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This chapter describes the function and displays the syntax for basic interface commands. For more information about defaults and usage guidelines, see the corresponding chapter of the Interface Command Reference.
Use the access-list global configuration command to establish MAC address access lists. Use the no form of this command to remove a single access list entry.
access-list access-list-number {permit | deny} address mask
access-list-number | Integer from 700 to 799 that you select for the list. |
permit | Permits the frame. |
deny | Denies the frame. |
address mask | 48-bit MAC addresses written in dotted triplet form. The ones bits in the mask argument are the bits to be ignored in the address value. |
Use the access-list global configuration command to build type-code access lists. Use the no form of this command to remove a single access list entry.
access-list access-list-number {permit | deny} type-code wild-mask
access-list-number | User-selectable number between 200 and 299 that identifies the list. |
permit | Permits the frame. |
deny | Denies the frame. |
type-code | 16-bit hexadecimal number written with a leading "0x"; for example, 0x6000. You can specify either an Ethernet type code for Ethernet-encapsulated packets, or a DSAP/SSAP pair for 802.3 or 802.5-encapsulated packets. |
wild-mask | 16-bit hexadecimal number whose ones bits correspond to bits in the type-code argument that should be ignored when making a comparison. (A mask for a DSAP/SSAP pair should always be at least 0x0101. This is because these two bits are used for purposes other than identifying the SAP codes.) |
To enable authentication and specify the string that must be present to accept any packet on the out-of-band (OOB) communications channel on a packet-over-SONET (POS) interface, use the aps authenticate interface configuration command. Use the no form of this command, to disable authentication.
aps authenticate string
string | Text that must be present to accept the packet on a protected or working interface. Up to eight alphanumeric characters are accepted. |
To manually switch the specified circuit to a protect interface, unless a request of equal or higher priority is in effect, use the aps force interface configuration command. Use the no form of this command, to cancel the switch.
aps force circuit-number
circuit-number | Number of the circuit to switch to the protect interface. |
To allow more than one protect and working interface to be supported on a router, use the aps group interface configuration command. Use the no form of this command, to remove a group.
aps group group-number
group-number | Number of the group. The default group number is 0. |
To prevent a working interface from switching to a protect interface, use the aps lockout interface configuration command. Use the no form of this command, to remove the lockout.
aps lockout circuit-number
circuit-number | Number of the circuit to lock out. |
To manually switch a circuit to a protect interface, use the aps manual interface configuration command. Use the no form of this command, to cancel the switch.
aps manual circuit-number
circuit-number | Number of the circuit to switch to a protect interface. |
To enable a POS interface as a protect interface, use the aps protect interface command. Use the no form of this command, to remove the POS interface as a protect interface.
aps protect circuit-number ip-address
circuit-number | Number of the circuit to enable as a protect interface. |
ip-address | IP address of the router that has the working POS interface. |
To enable automatic switchover from the protect interface to the working interface after the working interface becomes available, use the asp revert interface command. Use the no form of this command, to disable automatic switchover.
aps revert minutes
minutes | Number of minutes until the circuit is switched back to the working interface after the working interface is available. |
To change the time between hello packets and the time before the protect interface process declares a working interface's router to be down, use the aps timers interface configuration command. Use the no form of this command, to return to the default timers.
aps timers seconds1 seconds2
seconds1 | Number of seconds to wait before sending a hello packet (hello timer). The default is 1 second. |
seconds2 | Number of seconds to wait to receive a response from a hello packet before the interface is declared down (hold timer). The default is 3 seconds. |
To configure a protect interface for unidirectional mode, use the aps unidirectional interface configuration command. Use the no form of this command, to return to the default, bidirectional mode.
aps unidirectionalTo configure a POS interface as a working interface, use the aps working interface configuration command. Use the no form of this command, to remove the protect from the POS interface.
aps working circuit-number
circuit-number | Circuit number associated with this working interface. |
To set the mode of operation and thus control the type of the ATM cell used for cell-rate decoupling on the SONET PLIM, use the atm sonet interface configuration command. Use the no form of this command, to restore the default Synchronous Transport Signal level 12, concatenated (STS-12c) operation.
atm sonet [stm-4]
stm-4 | (Optional) Synchronous Digital Hierarchy/Synchronous Transport Signal level 4 (SDH/STM-4) operation (ITU-T specification). |
To enable automatic receiver polarity reversal on a hub port connected to an Ethernet interface of a Cisco 2505 or Cisco 2507, use the auto-polarity hub configuration command. Use the no form of this command, to disable this feature.
auto-polarityTo set a bandwidth value for an interface, use the bandwidth interface configuration command. Use the no form of this command to restore the default values.
bandwidth kilobits
kilobits | Intended bandwidth in kilobits per second. For a full bandwidth DS3, enter the value 44736. |
To specify the distance of the cable from the routers to the network equipment, use the cablelength controller configuration command. Use the no form of this command to restore the default cable length.
cablelength feet
feet | Number of feet in the range of 0 to 450. The default varies for different routers. |
To increase the pulse of a signal at the receiver and decrease the pulse from the transmitter using pulse equalization and line build-out for a T1 cable on an AS5200, use the cablelength long controller configuration command. Use the no form of this command, to return the pulse equalization and line build-out values to their default settings.
cablelength long dbgain-value dbloss-value
dbgain-value | Number of decibels by which the receiver signal is increased. Use the keyword gain26 or gain36 to specify this value. |
dbloss-value | Number of decibels by which the transmit signal is decreased. Use one of the following keywords to specify this value:
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To set a cable length 655 feet or shorter for a DS1 link on the Cisco MC3810, use the cablelength short controller configuration command. This command is supported on T1 controllers only. The no form of this command deletes the cablelength short value. To set cable lengths longer than 655 feet, use the cablelength long command.
cablelength short {133 | 266 | 399 | 533 | 655}
133 | Specifies a cable length from 0-133 feet. |
266 | Specifies a cable length from 134-266 feet. |
399 | Specifies a cable length from 267-399 feet. |
533 | Specifies a cable length from 400-533 feet. |
655 | Specifies a cable length from 534-655 feet. |
To configure channelized T1 timeslots with channel associated signaling (also known as robbed bit signaling), which enables an AS5200 modem to answer and send an analog call, use the cas-group controller configuration command. Use the no form of this command to disable channel associated signaling for one or more timeslots.
cas-group channel-number [timeslots range]
channel-number | Specifies a single channel group number. The channel number can be between 0 and 23. |
timeslots range | (Optional) Specifies a timeslot range of values from 1 to 24. The default value configures 24 timeslots with the channel associated signal called E&M (Ear and Mouth), which is the default signal type. |
To assign a Fast Ethernet interface to a Fast EtherChannel group, use the channel-group interface configuration command. To remove a Fast Ethernet interface from a Fast EtherChannel group, use the no form of this command.
channel-group channel-number
channel-number | Port-channel number previously assigned to the port-channel interface when using the interface port-channel global configuration command. The range is 1 to 4. |
To reboot the LAN Extender chassis and restart its operating software, use the clear controller lex privileged EXEC command.
clear controller lex number [prom]
number | Number of the LAN Extender interface corresponding to the LAN Extender to be rebooted. |
prom | (Optional) Forces a reload of the PROM image, regardless of any Flash image. |
slot | Refer to the appropriate hardware manual for slot and port information. |
port | Refer to the appropriate hardware manual for slot and port information. |
(Optional) Specifies the interface type. | |
port-adapter | Refer to the appropriate hardware manual for information about port adapter compatibility. |
To clear the interface counters, use the clear counters EXEC command.
clear counters [type number]
(Optional) Specifies the interface type; one of the keywords. | |
number | (Optional) Specifies the interface counter displayed with the show interfaces command. |
ethernet | (Optional) If the type is lex, you can clear the interface counters on the Ethernet interface. |
serial | (Optional) If the type is lex, you can clear the interface counters on the serial interface. |
slot | Refer to the appropriate hardware manual for slot and port information. |
port | Refer to the appropriate hardware manual for slot and port information. |
port-adapter | Refer to the appropriate hardware manual for information about port adapter compatibility. |
Use the clear hub EXEC command to reset and reinitialize the hub hardware connected to an interface of a Cisco 2505 or 2507 router.
clear hub ethernet number
ethernet | Indicates the hub in front of an Ethernet interface. |
number | Hub number to clear, starting with 0. Since there is currently only one hub, this number is 0. |
Use the clear hub counters EXEC command to set to zero the hub counters on an interface of a Cisco 2505 or 2507 router.
clear hub counters [ether number [port [end-port]]]
ether | (Optional) Indicates the hub in front of an Ethernet interface. |
number | (Optional) Hub number for which to clear counters. Since there is currently only one hub, this number is 0. If you specify the keyword ether, you must specify the number. |
port | (Optional) Port number on the hub. On the Cisco 2505 router, port numbers range from 1 to 8. On the Cisco 2507 router, port numbers range from 1 to 16. If a second port number follows, then this port number indicates the beginning of a port range. If you do not specify a port number, counters for all ports are cleared. |
end-port | (Optional) Ending port number of a range. |
Use the clear interface EXEC command to reset the hardware logic on an interface.
clear interface type number
Specifies the interface type. | |
number | Specifies the port, connector, or interface card number. |
slot | Refer to the appropriate hardware manual for slot and port information. |
port | Refer to the appropriate hardware manual for slot and port information. |
port-adapter | (Optional) Refer to the appropriate hardware manual for information about port adapter compatibility. |
:channel-group | (Optional) On Cisco 7500 series routers supporting channelized T1, specifies the channel from 0 to 23. This number is preceded by a colon. |
:t1-channel | (Optional) For the CT3IP, the T1 channel is a number between 1 and 28. T1 channels on the CT3IP are numbered 1 to 28 rather than the more traditional zero-based scheme (0 to 27) used with other Cisco products. This numbering scheme ensures consistency with telco numbering schemes for T1 channels within channelized T3 equipment. |
Use the clear interface fastethernet privileged EXEC command to reset the controller for a specified Fast Ethernet interface.
clear interface fastethernet number (Cisco 4500 and 4700 series routers)
number | Port, connector, or interface card number. On a Cisco 4500 or Cisco 4700 router, specifies the NPM number. The numbers are assigned at the factory at the time of installation or when added to a system. |
slot | Refer to the appropriate hardware manual for slot and port information. |
port | Refer to the appropriate hardware manual for slot and port information. |
port-adapter | Refer to the appropriate hardware manual for information about port adapter compatibility. |
Use the clear rif-cache EXEC command to clear entries from the Routing Information Field (RIF) cache.
clear rif-cacheUse the clear service-module serial privileged EXEC configuration command to reset an integrated CSU/DSU.
clear service-module serial number
number | Number of the serial interface. |
Use the clock rate interface configuration command to configure the clock rate for the hardware connections on serial interfaces such as network interface modules (NIMs) and interface processors to an acceptable bit rate. Use the no form of this command to remove the clock rate if you change the interface from a DCE to a DTE device. Using the no form of this command on a DCE interface sets the clock rate to the hardware-dependent default value.
clock rate bps
bps | Desired clock rate in bits per second: 1200 2400 4800 9600 19200 38400 56000 64000 72000 125000 148000 250000 500000 800000 1000000 1300000 2000000 4000000 or 8000000. For the synchronous serial port adapters (PA-8T-V35, PA-8T-X21, PA-8T-232, and PA-4T+), a nonstandard clock rate can be used. You can enter any value from 300 to 8000000 bps. The clock rate you enter is rounded (adjusted), if necessary, to the nearest value your hardware can support except for the following standard rates: 1200 2400 4800 9600 14400 19200 28800 38400 56000 64000 128000 or 2015232. |
Use the clock source interface configuration command to select the clock source for the time-division multiplexing (TDM) bus in a Cisco AS5200 access server. The no form of this command configures the clock source to its default setting.
clock source {line {primary | secondary} | internal}
line | Clock source on the active line. |
primary | Primary TDM clock source. |
secondary | Secondary TDM clock source. |
internal | Selects the free running clock (also known as internal clock) as the clock source. |
Use the clock source controller configuration command to specify the clock source of a DS1 link on the Cisco MC3810.
clock source {line | internal | loop-timed}
line | Specifies that the DS1 link uses the recovered clock. The line value is the default clock source used when the Multiflex Trunk (MFT) is installed. |
internal | Specifies that the DS1 link uses the internal clock. The internal value is the default clock source used when the Digital Voice Module (DVM) is installed. |
loop-timed | Specifies that the T1/E1 controller will take the clock from the Rx (line) and use it for Tx. This setting decouples the controller clock from the system-wide clock set with the network-clock-select command. The loop-timed clock enables the DVM to connect to a PBX and to connect the MFT to a central office when both the PBX and the central office function as DCE clock sources. This situation assumes that the PBX also takes the clocking from the central office thereby synchronizing the clocks on the DVM and the MFT. |
Use the clock source controller configuration command to set the T1-line clock-source for the MIP in the Cisco 7200 series and Cisco 7500 series or for the NPM in the Cisco 4000 series or a T3 interface or a PA-T3 serial port adapter.
clock source {line | internal}
line | Specifies that the interface will clock its transmitted data from a clock recovered from the line's receive data stream (default). |
internal | Specifies that the interface will clock its transmitted data from its internal clock. |
Use the clock source controller configuration command to specify where the clock source is obtained for use by the Channelized T3 Interface Processor (CT3IP) in Cisco 7500 series routers. Use the no form of this command to restore the default clock source.
clock source {internal | line | loop-timed}
internal | Specifies that the internal clock source is used. This is the default. |
line | Specifies that the network clock source is used. |
loop-timed | Decouples the controller clock from the system-wide clock set with the network-clock-select command. The loop-timed clock enables the DVM to connect to a PBX and to connect the MFT to a central office when both the PBX and the central office function as DCE clock sources. This situation assumes that the PBX also takes the clocking from the central office thereby synchronizing the clocks on the DVM and the MFT. |
To control the clock used by a G.703-E1 interface, an E1-G.703/G.704 serial port adapter, or a PA-E3 serial port adapter will use to clock its transmitted data from, use the clock source interface configuration command. Use the no form of this command, to restore the default value.
clock source {line | internal}
line | Specifies that the interface will clock its transmitted data from a clock recovered from the line's receive data stream (default). |
internal | Specifies that the interface will clock its transmitted data from its internal clock. |
primary | Primary TDM clock source. |
secondary | Secondary TDM clock source. |
Use the cmt connect EXEC command to start the processes that perform the connection management (CMT) function and allow the ring on one fiber to be started.
cmt connect [interface-name [phy-a | phy-b]]
interface-name | (Optional) Specifies the FDDI interface. |
phy-a | (Optional) Selects Physical Sublayer A. |
phy-b | (Optional) Selects Physical Sublayer B. |
Use the cmt disconnect EXEC command to stop the processes that perform the connection management (CMT) function and allow the ring on one fiber to be stopped.
cmt disconnect [interface-name [phy-a | phy-b]]
interface-name | (Optional) Specifies the FDDI interface. |
phy-a | (Optional) Selects Physical Sublayer A. |
phy-b | (Optional) Selects Physical Sublayer B. |
To configure compression for Link Access Procedure, Balanced (LAPB), Point-to-Point Protocol (PPP), and High-Level Data Link Control (HDLC) encapsulations, use the compress interface configuration command. On Cisco 7200 series routers and Cisco 7500 series routers, hardware compression on the compression service adapter (CSA) is supported for PPP links. To disable compression, use the no form of this command.
compress {predictor | stac}
predictor | Specifies that a predictor (RAND) compression algorithm will be used on LAPB and PPP encapsulation. Compression is implemented in the software installed in the router's main processor. |
stac |
On Cisco 7200 series, on VIP2s in Cisco 7500 series specifying the compress stac command with no options causes the router to use the fastest available compression method for PPP encapsulation only: · If the router contains a compression service adapter (CSA), compression is performed in the CSA hardware (hardware compression). · If the CSA is not available, compression is performed in the software installed on the VIP2 (distributed compression). · If the VIP2 is not available, compression is performed in the router's main processor (software compression). |
distributed | (Optional) Specifies that compression is implemented in the software that is installed in a VIP2. If the VIP2 is not available, compression is performed in the router's main processor (software compression). |
software | (Optional) Specifies that compression is implemented in the Cisco IOS software installed in the router's main processor. |
csa slot | (Optional) Specifies the CSA to use for a particular interface. This option applies only to Cisco 7200 series routers. |
To configure the Channelized T3 Interface Processor (CT3IP) in Cisco 7500 series routers, use the controller t3 global configuration command.
controller t3 slot/port-adapter/port
slot | Refer to the appropriate hardware manual for slot and port information. |
port-adapter | Refer to the appropriate hardware manual for information about port adapter compatibilty. |
port | Refer to the appropriate hardware manual for slot and port information. |
To download an executable image from Flash memory on the core router to the LAN Extender chassis, use the copy flash lex privileged EXEC command.
copy flash lex number
number | Number of the LAN Extender interface to which to download an image from Flash memory. |
To download an executable image from a TFTP server to the LAN Extender, use the copy tftp lex privileged EXEC command.
copy tftp lex number
number | Number of the LAN Extender interface to which to download an image. |
To set the length of the cyclic redundancy check (CRC) on a Fast Serial Interface Processor (FSIP) or HSSI Interface Processor (HIP) of the Cisco 7500 series routers or on a 4-port serial adapter of the Cisco 7200 series routers, use the crc interface configuration command. To set the CRC length to 16 bits, use the no form of this command.
crc size
size | CRC size (16 or 32 bits). |
To enable generation of CRC5 (per ITU Recommendation G.704 and G.703) to improve data integrity, use the crc bits 5 interface configuration command. To disable this feature, use the no form of this command.
crc bits 5To enable generation of CRC4 (per ITU Recommendation G.704 and G.703) to improve data integrity, use the crc4 interface configuration command. To disable this feature, use the no form of this command.
crc4To configure the interfaces on the PA-12E/2FE port adapter to use cut-through switching technology between interfaces within the same bridge group, use the cut-through interface command. To return each interface to store-and-forward switching, use the no form of this command.
cut-through [receive | transmit]
receive | (Optional) Selects cut-through switching technology on received data. |
transmit | (Optional) Selects cut-through switching technology on transmitted data. |
To set a delay value for an interface, use the delay interface configuration command. Use the no form of this command to restore the default delay value.
delay tens-of-microseconds
tens-of-microseconds | Integer that specifies the delay in tens of microseconds for an interface or network segment. |
When running the line at high speeds and long distances, use the dce-terminal-timing enable interface configuration command to prevent phase shifting of the data with respect to the clock. If SCTE is not available from the DTE, use no form of this command, which causes the DCE to use its own clock instead of SCTE from the DTE.
dce-terminal-timing enableUse the description controller configuration command to add a description to an E1 or T1 controller or the Channelized T3 Interface Processor (CT3IP) in Cisco 7500 series routers. Use the no form of this command to remove the description.
description string
string | Comment or a description to help you remember what is attached to the interface. Up to 80 characters. |
Use the down-when-looped interface configuration command to configure an interface to inform the system it is down when loopback is detected.
down-when-loopedTo specify the maximum allowable bandwidth used by the PA-E3 port adapter and PA-T3 port adapter, use the dsu bandwidth interface configuration command. To return to the default bandwidth, use the no form of this command.
dsu bandwidth kbps
kbps | Maximum bandwidth in the range of 22 kbps to 44736 kbps. The default varies for different port adapters. |
To specify the interoperability mode used by a PA-E3 port adapter or PA-T3 port adapter, use the dsu mode interface configuration command. To return to the default mode, use the no form of this command.
dsu mode {0 | 1 | 2}
0 | Sets the interoperability mode to 0. This is the default. Specify mode 0 to connect a PA-E3 port adapter to another PA-E3 port adapter or to a Digital Link DSU (DL3100). Use mode 0 to connect a PA-T3 port adapter to another PA-T3 port adapter or to a Digital Link DSU (DL3100). |
1 | Sets the interoperability mode to 1. Specify mode 1 to connect a PA-E3 port adapter or PA-T3 port adapter to a Kentrox DSU. |
2 | Sets the interoperability mode to 2. Specify mode 2 to connect a PA-T3 port adapter to a Larscom DSU. |
Use the dte-invert-txc interface configuration command to invert the TXC clock signal received from the DCE. Use the no form of this command if the DCE accepts SCTE from the DTE.
dte-invert-txcTo configure the duplex operation on an interface, use the duplex interface configuration command. Use the no form of this command to return the system to half-duplex mode, which is the system default.
duplex {full | half | auto}
full | Specifies full-duplex operation. |
half | Specifies half-duplex operation. |
auto | Specifies the auto negotiation capability. The interface automatically operates at half or full duplex, depending on environmental factors, such as the type of media and transmission speeds for the peer routers, hubs, and switches used in the network configuration. |
To enable early token release on Token Ring interfaces, use the early-token-release interface configuration command. Once enabled, use the no form of this command to disable this feature.
early-token-releaseTo set the encapsulation method used by the interface, use the encapsulation interface configuration command.
encapsulation encapsulation-type
encapsulation-type | Encapsulation type; one of the following keywords: · atm-dxi---Asynchronous Transfer Mode-Data Exchange Interface. · bstun---Block Serial Tunnel. · frame-relay---Frame Relay (for serial interface). · hdlc---High-Level Data Link Control (HDLC) protocol for serial interface. This encapsulation method provides the synchronous framing and error detection functions of HDLC without windowing or retransmission. · isl --- Inter-Switch Link (ISL) (for virtual LANs) · lapb---X.25 LAPB DTE operation (for serial interface). · ppp---Point-to-Point Protocol (PPP) (for serial interface). · sde---IEEE 802.10 Security Data Exchange. · sdlc---IBM serial SNA. · sdlc-primary---IBM serial SNA (for primary serial interface). · sdlc-secondary---IBM serial SNA (for secondary serial interface). · smds---Switched Multimegabit Data Services (SMDS) (for serial interface). |
Use the fddi burst-count interface configuration command to allow the FCI card to preallocate buffers to handle bursty FDDI traffic (for example, NFS bursty traffic). Use the no form of this command to revert to the default value.
fddi burst-count numbernumber | Number of preallocated buffers in the range from 1 to 10. The default is 3 buffers. |
To set the C-Min timer on the PCM, use the fddi c-min interface configuration command. Use the no form of this command to revert to the default value.
fddi c-min microsecondsmicroseconds | Sets the timer value in microseconds. The default is 1600 microseconds. |
To control the information transmitted during the connection management (CMT) signaling phase, use the fddi cmt-signal-bits interface configuration command.
fddi cmt-signal-bits signal-bits [phy-a | phy-b]
signal-bits | A hexadecimal number preceded by 0x; for example, 0x208. The FDDI standard defines ten bits of signaling information that must be transmitted, as follows: · bit 0---Escape bit. Reserved for future assignment by the FDDI standards committee. · bits 1 and 2---Physical type. · bit 3---Physical compatibility. Set if topology rules include the connection of a physical-to-physical type at the end of the connection. · bits 4 and 5---Link confidence test duration. · bit 6---Media Access Control (MAC) available for link confidence test. · bit 7---Link confidence test failed. The setting of bit 7 indicates that the link confidence was failed by the Cisco end of the connection. · bit 8---MAC for local loop. · bit 9---MAC on physical output. |
phy-a | (Optional) Selects Physical Sublayer A. |
phy-b | (Optional) Selects Physical Sublayer B. |
Use the fddi duplicate-address-check interface configuration command to turn on the duplicate address detection capability on the FDDI. Use the no form of this command to disable this feature.
fddi duplicate-address-checkUse the fddi encapsulate interface configuration command to specify encapsulating bridge mode on the CSC-C2/FCIT interface card. Use the no form of this command to turn off encapsulation bridging and return the FCIT interface to its translational, nonencapsulating mode.
fddi encapsulateTo specify the maximum number of frames that the FDDI interface will transmit per token capture, use the fddi frames-per-token interface configuration command. Us the no form of this command to revert to the default value.
fddi frames-per-token number
number | Maximum number of frames to transmit per token capture. Valid values are from 1 to 10. the default is 3. |
To enable the SMT frame processing capability on the FDDI, use the fddi smt-frames interface configuration command. Use the no form of this command to disable this function and prevent the Cisco IOS software from generating or responding to SMT frames.
fddi smt-framesTo set the TB-Min timer in the physical connection management (PCM), use the fddi tb-min interface configuration command. Use the no form of this command to revert to the default value.
fddi tb-min millisecondsmilliseconds | Number that sets the TB-Min timer value. The default is 100 milliseconds. |
To control the TL-Min time (the minimum time to transmit a Physical Sublayer, or PHY line state, before advancing to the next physical connection management [PCM] state, as defined by the X3T9.5 specification), use the fddi tl-min-time interface configuration command.
fddi tl-min-time microseconds
microseconds | Number that specifies the time used during the connection management (CMT) phase to ensure that signals are maintained for at least the value of TL-Min so the remote station can acquire the signal. The default is 30 microseconds. |
To set the t-out timer in the physical connection management (PCM), use the fddi t-out interface configuration command. Use the no form of this command to revert to the default value.
fddi t-out millisecondsmilliseconds | Number that sets the timeout timer. The default is 100 milliseconds. |
To control ring scheduling during normal operation and to detect and recover from serious ring error situations, use the fddi token-rotation-time interface configuration command.
fddi token-rotation-time microseconds
microseconds | Number that specifies the token rotation time (TRT). The default is 5000 microseconds. |
To recover from a transient ring error, use the fddi valid-transmission-time interface configuration command.
fddi valid-transmission-time microseconds
microseconds | Number that specifies the transmission valid timer (TVX) interval. The default is 2500 microseconds. |
To set the facilities data link exchange standard for the CSU controllers, enter the fdl controller configuration command. Use the no form of this command, to disables facilities data-link support.
fdl {att | ansi | both}
att | Selects AT&T technical reference 54016 for extended superframe facilities data link exchange support. |
ansi | Selects ANSI T1.403 for extended superframe facilities data link exchange support. |
both | (Supported on the Cisco MC3810 only) Specifies to support both AT&T technical reference 54016 and ANSI T1.403 for extended superframe facilities data link excchange support. |
Use the framing controller configuration command to select the frame type for the E1 or T1 data line.
framing {sf | esf} (for T1 lines)
sf | Specifies super frame as the T1 frame type. |
esf | Specifies extended super frame as the T1 frame type. |
crc4 | Specifies CRC4 frame as the E1 frame type. |
no-crc4 | Specifies no CRC4 frame as the E1 frame type. |
australia | (Optional) Specifies the E1 frame type used in Australia. |
To specify E3 or T3 line framing for a PA-E3 port adapter or PA-T3 port adapter, use the framing interface configuration command. To return to the default G.751 framing or C-bit framing, use the no form of this command.
framing {bypass | g751} (PA-E3)
bypass | Specifies bypass E3 framing. |
g751 | Specifies G.751 E3 framing. This is the default for the PA-E3. |
c-bit | Specifies that the C-bit framing is used as the T3 framing type. This is the default for the PA-T3. |
m13 | Specifies m13 T3 framing. |
To specify T3 line framing used by the CT3IP port adapter, use the framing controller configuration command. Use the no form of this command to restore the default framing type.
framing {c-bit | m23 | auto-detect}
c-bit | Specifies that the C-bit framing is used as the T3 framing type. |
m23 | Specifies that the M23 framing is used as the T3 framing type. |
auto-detect | Specifies that the CT3IP detects the framing type it receives from the far-end equipment. This is the default. |
To specify full-duplex mode on full-duplex single-mode and multimode port adapters, use the full-duplex interface configuration command. Use the no form of this command to restore the default half-duplex mode.
full-duplexUse the half-duplex interface configuration command to specify half-duplex mode on an SDLC interface or on the FDDI full-duplex, single-mode port adapter and FDDI full-duplex, multimode port adapter on the Cisco 7200 series, and Cisco 7500 series routers. Refer to the Cisco Product Catalog for specific model numbers of port adapters.
half-duplexUse the half-duplex controlled-carrier interface configuration command to place a low-speed serial interface in controlled-carrier mode, instead of constant-carrier mode. Use the no form of this command to return the interface to constant-carrier mode.
half-duplex controlled-carrierTo tune half-duplex timers, use the half-duplex timer interface configuration command. Use the no form of this command, along with the appropriate keyword, to return to the default value for that parameter.
half-duplex timer {cts-delay value | cts-drop-timeout value | dcd-drop-delay value |
cts-delay value | Specifies the delay introduced by the DCE interface between the time it detects RTS to the time it asserts CTS in response. The range is dependent on the serial interface hardware. The default value is 0 milliseconds. |
cts-drop-timeout value | Determines the amount of time a DTE interface waits for CTS to be deasserted after it has deasserted RTS. If CTS is not deasserted during this time, an error counter is incremented to note this event. The range is 0 to 1140000 milliseconds (1140 seconds). The default value is 250 milliseconds. |
dcd-drop-delay value | Applies to DCE half-duplex interfaces operating in controlled-carrier mode (see the half-duplex controlled-carrier command). This timer determines the delay between the end of transmission by the DCE and the deassertion of DCD. The range is 0 to 4400 milliseconds (4.4 seconds). The default value is 100 milliseconds. |
dcd-txstart-delay value | Applies to DCE half-duplex interfaces operating in controlled-carrier mode. This timer determines the time delay between the assertion of DCD and the start of data transmission by the DCE interface. The range is 0 to 1140000 ms (1140 seconds). The default value is 100 milliseconds. |
rts-drop-delay value | Specifies the time delay between the end of transmission by the DTE interface and deassertion of RTS. The range is 0 to 1140000 milliseconds (1140 seconds). The default value is 3 milliseconds. |
rts-timeout value | Determines the number of milliseconds the DTE waits for CTS to be asserted after the assertion of RTS before giving up on its transmission attempt. If CTS is not asserted in the specified amount of time, an error counter is incremented. The range is dependent on the serial interface hardware. The default value is 3 milliseconds. |
transmit-delay value | Specifies the number of milliseconds a half-duplex interface will delay the start of transmission. In the case of a DTE interface, this delay specifies how long the interface waits after something shows up in the transmit queue before asserting RTS. For a DCE interface, this dictates how long the interface waits after data is placed in the transmit queue before starting transmission. If the DCE interface is in controlled-carrier mode, this delay shows up as a delayed assertion of DCD. This timer enables the transmitter to be adjusted if the receiver is a little slow and is not able to keep up with the transmitter. The range is 0 to 4400 milliseconds (4.4 seconds). The default value is 0 milliseconds. |
To specify the hold-queue limit of an interface, use the hold-queue interface configuration command. Use the no form of this command with the appropriate keyword to restore the default values for an interface.
hold-queue length {in | out}
length | Integer that specifies the maximum number of packets in the queue. |
in | Specifies the input queue. |
out | Specifies the output queue. |
Use the hssi external-loop-request interface configuration command to allow the router to support a CSU/DSU that uses the LC signal to request a loopback from the router. Use the no form of this command to disable the feature.
hssi external-loop-requestTo convert the HSSI interface into a clock master, use the hssi internal-clock interface configuration command. Use the no form of this command to disable the clock master mode.
hssi internal-clockTo enable and configure a port on an Ethernet hub of a Cisco 2505 or Cisco 2507, use the hub global configuration command.
hub ethernet number port [end-port]
ethernet | Indicates that the hub is in front of an Ethernet interface. |
number | Hub number, starting with 0. Since there is currently only one hub, this number is 0. |
port | Port number on the hub. On the Cisco 2505, port numbers range from 1 to 8. On the Cisco 2507, port numbers range from 1 to 16. If a second port number follows, then the first port number indicates the beginning of a port range. |
end-port | (Optional) Last port number of a range. |
Use the ignore-dcd interface configuration command to configure the serial interface to monitor the DSR signal (instead of the DCD signal) as the line up/down indicator. Use the no form of this command to restore the default.
ignore-dcdTo disable the monitoring of the LL pin when in DCE mode, enable the ingnore-hw local-loopback interface configuration command. To return to the default, use the no form of this command.
ignore-hw local-loopbackUse the interface global configuration command to configure an interface type and enter interface configuration mode.
interface type number
Type of interface to be configured. | |
number | Port, connector, or interface card number. On a Cisco 4000 series router, specifies the NPM number. The numbers are assigned at the factory at the time of installation or when added to a system, and can be displayed with the show interfaces command. |
slot | Refer to the appropriate hardware manual for slot and port information. |
port | Refer to the appropriate hardware manual for slot and port information. |
port-adapter | Refer to the appropriate hardware manual for information about port adapter compatibility. |
:channel-group | The Cisco 4000 series routers specifies the T1 channel group number in the range of 0 to 23 defined with the channel-group controller configuration command. On a dual port card, it is possible to run channelized on one port and primary rate on the other port. The Cisco MC3810 specifies the T1/E1 channel group number in the range of 0 to 23 defined with the channel-group controller configuration command. |
.subinterface-number | Subinterface number in the range 1 to 4294967293. The number that precedes the period (.) must match the number to which this subinterface belongs. |
multipoint | point-to-point | Specifies a multipoint or point-to-point subinterface. There is no default. |
To designate a dialer rotary group leader, use the interface dialer global configuration command.
interface dialer interface-number
interface-number | Integer that you select to indicate a dialer rotary group in the range 0 to 9. |
To select a particular Fast Ethernet interface for configuration, use the interface fastethernet global configuration command.
interface fastethernet number (Cisco 4500 and 4700 series routers)
number | Port, connector, or interface card number. On a Cisco 4500 or 4700 series routers, specifies the NIM or NPM number. The numbers are assigned at the factory at the time of installation or when added to a system. |
slot | Refer to the appropriate hardware manual for slot and port information. |
port | Refer to the appropriate hardware manual for slot and port information. |
port-adapter | Refer to the appropriate hardware manual for information about port adapter compatibility. |
To create a group interface that will serve as master, to which asynchronous interfaces can be associated as members, use the interface group-async global configuration command. Use the no form of the command to restore the default.
interface group-async unit-number
unit-number | The number of the asynchronous group interface being created. |
To specify a Fast EtherChannel and enter interface configuration mode, use the interface port-channel global configuration command.
interface port-channel channel-number
channel-number | Channel number assigned to this port-channel interface. Range is 1 to 4. |
Use the interface vg-anylan global configuration command to specify the interface on a 100VG-AnyLAN port adapter and enter interface configuration mode on Cisco 7200 series routers and Cisco 7500 series routers.
interface vg-anylan slot/port-adapter/port (VIP cards in Cisco 7500 series routers)
slot | Refer to the appropriate hardware manual for slot and port information. |
port | Refer to the appropriate hardware manual for slot and port information. |
port-adapter | Refer to the appropriate hardware manual for information about port adapter compatibility. |
To set the E3 international bit in the G.751 frame used by the PA-E3 port adapter, use the international bit interface configuration command. To return to the default international bit, use the no form of this command.
international bit {0 | 1} {0 | 1}
0 | 1 | Specifies the value of the first international bit in the G.751 frame. The default is 0. |
0 | 1 | Specifies the value of the second international bit in the G.751 frame. The default is 0. |
To invert the data stream, use the invert data interface configuration command. This command applies only to the Cisco 7000 series routers with the RSP7000 and RSP7000CI, Cisco 7200 series routers, and Cisco 7500 series routers. Use the no form of this command to disable inverting the data stream.
invert dataTo configure UIO serial port 0 or 1 on the Cisco MC3810 when the cable connected is DCE type, use the invert rxclock interface configuration command. The command inverts the phase of the RX clock on the UIO serial interface, which does not use the T1/E1 interface. To disable the phase inversion, use the no form of this command.
invert rxclockThe invert txclock command replaces this command. Refer to the description of invert txclock in this chapter for further details.
Use the invert txclock interface configuration command to invert the transmit clock signal. Delays between the SCTE clock and data transmission indicate that the transmit clock signal might not be appropriate for the interface rate and length of cable being used. Different ends of the wire can have variances that differ slightly. The invert txclock command compensates for these variances. This command replaces the invert-transmit-clock command.
invert txclockTo set the keepalive timer for a specific interface, use the keepalive interface configuration command. To turn off keepalives entirely, use the no form of this command.
keepalive [seconds]
seconds | (Optional) Unsigned integer value greater than 0. The default is 10 seconds. |
To set the burned-in MAC address for a LAN Extender interface, use the lex burned-in-address interface configuration command. To clear the burned-in MAC address, use the no form of this command.
lex burned-in-address ieee-address
ieee-address | 48-bit IEEE MAC address written as a dotted triplet of four-digit hexadecimal numbers. |
To assign an access list that filters on MAC addresses, use the lex input-address-list interface configuration command. To remove an access list from the interface, use the no form of this command.
lex input-address-list access-list-number
access-list-number | Number of the access list you assigned with the access-list global configuration command. It can be a number from 700 to 799. |
Use the lex input-type-list interface configuration command to assign an access list that filters Ethernet packets by type code. To remove an access list from the interface, use the no form of this command.
lex input-type-list access-list-number
access-list-number | Number of the access list you assigned with the access-list global configuration command. It can be a number in the range 200 to 299. |
Use the lex priority-group interface configuration command to activate priority output queuing on the LAN Extender. To disable priority output queuing, use the no form of this command.
lex priority-group group
group | Number of the priority group. It can be a number in the range 1 to 10. |
Use the lex retry-count interface configuration command to define the number of times to resend commands to the LAN Extender chassis. To return to the default value, use the no form of this command.
lex retry-count number
number | Number of times to retry sending commands to the LAN Extender. It can be a number in the range 0 to 100. The default is 10 times. |
Use the lex timeout interface configuration command to define the amount of time to wait for a response from the LAN Extender. To return to the default time, use the no form of this command.
lex timeout milliseconds
milliseconds | Time, in milliseconds, to wait for a response from the LAN Extender before resending the command. It can be a number in the range 500 to 60000. The default is 2000 milliseconds (2 seconds). |
Use the linecode controller configuration command to select the line-code type for T1 or E1 line.
linecode {ami | b8zs | hdb3}
ami | Specifies alternate mark inversion (AMI) as the line-code type. Valid for T1 or E1 controllers. |
b8zs | Specifies B8ZS as the line-code type. Valid for T1 controller only. |
hdb3 | Specifies high-density bipolar 3 (hdb3) as the line-code type. Valid for E1 controller only. |
To reenable the link-test function on a port on an Ethernet hub of a Cisco 2505 or Cisco 2507, use the link-test hub configuration command. Use the no form of this command to disable this feature if a pre-10BaseT twisted-pair device not implementing link test is connected to the hub port.
link-testTo enable Lanoptics Hub Networking Management of a PCbus Token Ring interface, use the local-lnm interface configuration command. Use the no form of this command to disable Lanoptics Hub Networking Management.
local-lnmTo loop the serial interface on a PA-E3 or a PA-T3 port adapter, use the loopback interface configuration command. To remove the loopback, use the no form of this command.
loopback {dte | local | network {line | payload}} (PA-E3)
dte | Sets the loopback after the LIU toward the terminal. |
local | Sets the loopback after going through the framer toward the terminal. |
network {line | payload} | Sets the loopback toward the network before going through the framer (line) or after going through the framer (payload). |
remote | Sends a far-end alarm control (FEAC) to set the remote framer in loopback. |
To diagnose equipment malfunctions between interface and device, use the loopback interface configuration command. The no form of this command disables the test.
loopbackTo loop individual T1 channels on the Channelized T3 Interface Processor (CT3IP) in Cisco 7000 series routers with the RSP7000 and RSP7000CI and in Cisco 7500 series routers, use the loopback interface configuration command. Use the no form of this command to remove the loopback.
loopback [local | network {line | payload} | remote {line {fdl {ansi | bellcore} | inband} |
local | (Optional) Loops the router output data back toward the router at the T1 framer and sends an AIS signal out toward the network. |
network {line | payload} | (Optional) Loops the data back toward the network before the T1 framer and automatically sets a local loopback at the HDLC controllers (line) or loops the payload data back toward the network at the T1 framer and automatically sets a local loopback at the HDLC controllers (payload). |
remote line fdl {ansi | bellcore} | (Optional) Sends a repeating, 16-bit ESF data link code word (00001110 11111111 for FDL ANSI and 00010010 11111111 for FDL Bellcore) to the remote end requesting that it enter into a network line loopback. Specify the ansi keyword to enable the remote line Facility Data Link (FDL) ANSI bit loopback on the T1 channel, per the ANSI T1.403 Specification. Specify the bellcore keyword to enable the remote SmartJack loopback on the T1 channel, per the TR-TSY-000312 Specification. |
remote line inband | (Optional) Sends a repeating, 5-bit inband pattern (00001) to the remote end requesting that it enter into a network line loopback. |
remote payload [fdl] [ansi] | (Optional) Sends a repeating, 16-bit ESF data link code word (00010100 11111111) to the remote end requesting that it enter into a network payload loopback. Enables the remote payload Facility Data Link (FDL) ANSI bit loopback on the T1 channel. You can optionally specify fdl and ansi, but it is not necessary. |
To loop the entire T3 (all 28 T1 channels) on the Channelized T3 Interface Processor (CT3IP) in Cisco 7500 series routers, use the loopback controller configuration command. Use the no form of this command to remove the loopback.
loopback [local | network | remote]
local | (Optional) Loops the data back toward the router and sends an AIS signal out toward the network. |
network | (Optional) Loops the data toward the network at the T1 framer. |
remote | (Optional) Sends a far-end alarm control (FEAC) request to the remote end requesting that it enter into a network line loopback. FEAC requests (and therefore remote loopbacks) are only possible when the T3 is configured for C-bit framing. The type of framing used is determined by the equipment you are connecting to (for more information, see the framing controller command). |
To configure an internal loop on the HSSI applique, use the loopback interface configuration command. To remove the loop, use the no form of this command.
loopback appliqueTo loop packets back to the DTE from the CSU/DSU, when the device supports this feature, use the loopback interface configuration command. To remove the loop, use the no form of this command.
loopback dteUse the loopback line interface configuration command, to loop packets completely through the CSU/DSU to configure the CSU loop. To remove the loop, use the no form of this command.
loopback line [payload]
payload | (Optional) Configures a loopback point at the DSU and loops back data to the network on an integrated CSU/DSU. |
To loop packets through a CSU/DSU, over a DS-3 link or a channelized T1 link, to the remote CSU/DSU and back, use the loopback remote interface configuration command. To remove the loopback, use the no form of this command.
loopback remote {full | payload | smart-jack} [0in1 | 1in1 | 1in2 | 1in5 | 1in8 | 3in24 | qrw |To configure the Maintenance Data Link (MDL) message defined in the ANSI T1.107a-1990 specification for the Channelized T3 Interface Processor (CT3IP) in Cisco 7500 series routers, use the mdl interface configuration command . Use the no form of this command to remove the message.
mdl {transmit {path | idle-signal | test-signal} | string {eic | lic | fic | unit | pfi | port |
transmit path | Enables transmission of the MDL Path message. |
transmit idle-signal | Enables transmission of the MDL Idle Signal message. |
transmit test-signal | Enables transmission of the MDL Test Signal message. |
string eic string | Specifies the Equipment Identification Code; can be up to 10 characters. |
string lic string | Specifies the Location Identification Code; can be up to 11 characters. |
string fic string | Specifies the Frame Identification Code; can be up to 10 characters. |
string unit string | Specifies the Unit Identification Code; can be up to 6 characters. |
string pfi string | Specifies the Facility Identification Code sent in the MDL Path message; can be up to 38 characters. |
string port string | Specifies the Port number string sent in the MDL Idle Signal message; can be up to 38 characters. |
string generator string | Specifies the Generator number string sent in the MDL Test Signal message; can be up to 38 characters. |
To specify the physical connection on an interface, use the media type interface configuration command. Use the no form of this command to restore the default value.
media-type {aui | 10baset | 100baset | mii}
aui | Selects a 15-pin physical connection. |
10baset | Selects an R-J45 10BaseT physical connection. |
100baset | Specifies an RJ-45 100BaseT physical connection. |
mii | Specifies a media-independent interface. |
Use the mop enabled interface configuration command to enable an interface to support the Maintenance Operation Protocol (MOP). To disable MOP on an interface, use the no form of this command.
mop enabledTo enable an interface to send out periodic Maintenance Operation Protocol (MOP) system identification messages, use the mop sysid interface configuration command. To disable MOP message support on an interface, use the no form of this command.
mop sysidTo adjust the maximum packet size or maximum transmission unit (MTU) size, use the mtu interface configuration command. Use the no form of this command to restore the MTU value to its original default value.
mtu bytes
bytes | Desired size in bytes. |
To set the E3 national bit in the G.751 frame used by the PA-E3 port adapter, use the national bit interface configuration command. To return to the default E3 national bit, use the no form of this command.
national bit {0 | 1}
0 | 1 | Specifies the E3 national bit in the G.751 frame. The default is 0. |
Use the nrzi-encoding interface configuration command to enable nonreturn-to-zero inverted (NRZI) line-coding format. Use the no form of this command to disable this capability.
nrzi-encoding [mark]
mark | (Optional) Specifies that NRZI mark encoding is required on the PA-8T and PA-4T+ synchronous serial port adapters on Cisco 7200 and 7500 series routers. If mark is not specified, NRZI space encoding is used. |
To specify the mode of a slow-speed serial interface on a router as either synchronous or asynchronous, use the physical-layer interface configuration command. To return the interface to the default mode of synchronous, use the no form of this command.
physical-layer {sync | async}
sync | Places the interface in synchronous mode. |
async | Places the interface in asynchronous mode. |
To enable an interface on a PA-4R-DTR port adapter to operate as a concentrator port, use the port interface configuration command. Use the no form of this command to restore the default station mode.
portTo set the SONET overhead bytes in the frame header to meet a specific standards requirement or to ensure interoperability with another vendor's equipment, use the pos flag interface configuration command. To remove the setting of the SONET overhead bytes, use the no form of this command.
pos flag {c2 | j0 | s1s0} value
c2 value | Path signal identifier used to identify the payload content type. |
j0 value | Section trace byte (formerly the C1 byte). For interoperability with SDH equipment in Japan, use the value 0x1. The byte value can be 0 to 255. |
sls0 value | S1 and S0 bits (bits 5 and 6 of the H1 #1 payload pointer byte). Use the following values to tell the SONET transmission equipment the SS bit: · For OC-3c, use 0 (this is the default). · For AU-4 container in SDH, use 2. The S1 and S0 bits can be 0 to 3. Values 1 and 3 are undefined. |
To specify the framing used on the POS interface, use the pos framing interface configuration command. To return to the default SONET STS-3c framing mode, use the no form of this command.
pos framing {sdh | sonet}
sdh | Selects SDH STM-1 framing. This framing mode is typically used in Europe. |
sonet | Selects SONET STS-3c framing. This is the default. |
The clock source (interface) command replaces this command. Refer to the description of clock source in this chapter for further details.
To permit selected SONET alarms to be logged to the console for a POS interface, use the pos report interface configuration command. To disable logging of select SONET alarms, use the no form of this command.
pos report {b1-tca | b2-tca | b3-tca | lais | lrdi | pais | plop | prdi | rdool | sd-ber | sf-ber |
b1-tca | Reports B1 bit error rate (BER) threshold crossing alarm errors. Reported by default. |
b2-tca | Reports B2 BER threshold crossing alarm errors. Reported by default. |
b3-tca | Reports B3 BER threshold crossing alarm errors. Reported by default. |
lais | Reports line alarm indication signal errors. |
lrdi | Reports line remote defect indication errors. |
pais | Reports path alarm indication signal errors. |
plop | Reports path loss of pointer errors. Reported by default. |
prdi | Reports path remote defect indication errors. |
rdool | Reports receive data out of lock errors. |
sd-ber | Reports signal degradation BER errors. |
sf-ber | Reports signal failure BER errors. Reported by default. |
slof | Reports section loss of frame errors. Reported by default. |
slos | Reports section los of signal errors. Reported by default. |
To enable SONET payload scrambling on a POS interface, use the pos scramble-atm interface configuration command. To disable scrambling, use the no form of this command.
pos scramble-atmTo set the BER threshold values of the specified alarms for a POS interface, use the pos threshold interface configuration command. To return to the default setting, use the no form of this command.
pos threshold {b1-tca | b2-tca | b3-tca | sd-ber | sf-ber} rate
b1-tca | B1 bit error rate (BER) threshold crossing alarm. |
b2-tca | B2 BER threshold crossing alarm. |
b3-tca | B3 BER threshold crossing alarm. |
sd-ber | Signal degrade BER threshold. |
sf-ber | Signal failure BER threshold. |
rate | Bit error rate from 3 to 9 (10-n). The default is 6 for all thresholds except for the sf-ber. For sf-ber, the default is 3 (that is, 10e-3). |
To specify ISDN Primary Rate Interface (PRI) on a channelized E1 or T1 card on Cisco 7500 series router, use the pri-group controller configuration command. Use the no form of this command to remove the ISDN PRI.
pri-group [timeslots range]
timeslots range | (Optional) Specifies a single range of values from 1 to 23. |
To enable pulsing DTR signal intervals on the serial interfaces, use the pulse-time interface configuration command. Use the no form of this command to restore the default interval.
pulse-time seconds
seconds | Integer that specifies the DTR signal interval in seconds. |
To set the ring speed for the CSC-1R and CSC-2R Token Ring interfaces, use the ring-speed interface configuration command.
ring-speed speed
speed | Integer that specifies the ring speed, either 4 for 4-Mbps or 16 for 16-Mbps operation. |
To enable scrambling of the payload on the PA-E3 port adapter and the PA-T3 port adapter, use the scramble interface configuration command. To disable scrambling, use the no form of this command.
scrambleTo configure the network line speed for a serial interface on a 4-wire, 56/64-kbps CSU/DSU module, use the service-module 56k clock rate interface configuration command. Use the no form of this command to enable a network line speed of 56 kbps, which is the default.
service-module 56k clock rate speed
speed | Network line speed in kbps. The default speed is 56 kbps. Choose from one of the following optional speeds: · 2.4---2400 kbps · 4.8---4800 kbps · 9.6---9600 kbps · 19.2---19200 kbps · 38.4---38400 kbps · 56---56000 kbps · 64---64000 kbps · auto---Automatic line speed mode. Configure this option if your line speed is constantly changing. |
To set up the clock source on a serial interface for a 4-wire, 56/64-kbps CSU/DSU module, use the service-module 56k clock source interface configuration command. Use the no form of this command to specify the clocking come from line.
service-module 56k clock source {line | internal}
line | Uses the clocking provided by the active line coming in to the router. |
internal | Uses the internal clocking provided by the hardware module. |
To prevent application data from replicating loopback codes when operating at 64 kbps on a 4-wire CSU/DSU, use the service-module 56k data-coding interface configuration command. Use the no form of this command to enable normal transmission.
service-module 56k data-coding {normal | scrambled}
normal | Specifies normal transmission of data. |
scrambled | Scrambles bit codes or user data before transmission. All control codes such as out of service and out of frame are avoided. |
To transmit packets in switched dial-up mode or digital data service (DDS) mode using a serial interface on a 4-wire, 56/64-kbps CSU/DSU module, use the service-module 56k network-type interface configuration command. Use the no form of this command to transmit from a dedicated leased line in DDS mode.
service-module 56k network-type {dds | switched}
dds | Transmits packets in DDS mode or through a dedicated leased line. |
switched | Transmits packets in switched dial-up mode. On a 2-wire, switched 56-kbps CSU/DSU module this is the default and only setting. |
To enable the acceptance of a remote loopback request on a serial interface on a 2- or 4-wire, 56/64-kbps CSU/DSU module, use the service-module 56k remote-loopback interface configuration command. Use the no form of this command to disable the module from entering loopback.
service-module 56k remote-loopbackTo select a service provider to use with a 2- or 4-wire, 56/64 kbps dial-up serial line, use the service-module 56k switched-carrier interface configuration command. Use the no form of this command to enable the default service provider.
service-module 56k switched-carrier {att | sprint | other}
att | AT&T or other digital network service provider. |
sprint | Sprint or other service provider whose network requires echo cancelers. |
other | Any other service provider. |
To specify the clock source for the fractional T1/T1 CSU/DSU module, use the service-module t1 clock source interface configuration command. Use the no form of this command to return to the default line clock.
service-module t1 clock source {internal | line}
internal | Specifies the CSU/DSU internal clock. |
line | Specifies the line clock. |
To guarantee the ones density requirement on an AMI line using the fractional T1/T1 module, use the service-module t1 data-coding interface configuration command. Use the no form of this command to enable normal data transmission.
service-module t1 data-coding {inverted | normal}
inverted | Inverts bit codes by changing all 1 bits into 0 bits and all 0 bits into 1 bits. |
normal | Requests that no bit codes be inverted before transmission. |
To set the fdl parameter to either att or ansi, use the service-module t1 fdl inteface configuration command. Use the no form of this command to ignore the fdl parameter.
service-module t1 fdl {ansi | att}
ansi | Sets the fdl parameter to ansi. |
att | Sets the fdl parameter to att. |
To select the frame type for a line using the fractional T1/T1 (FT1/T1) module, use the service-module t1 framing interface configuration command. Use the no form of this command to revert to the default, which is Extended Superframe.
service-module t1 framing {esf | sf}
esf | Specifies Extended Super Frame as the T1 frame type. |
sf | Specifies D4 Super Frame as the T1 frame type. |
To configure the CSU line build out (LBO) on a fractional T1/T1 CSU/DSU module, use the service-module t1 lbo interface configuration command. Use the no form of this command to disable line build out.
service-module t1 lbo {-15 db | -7.5 db | none}
-15 db | Decreases outgoing signal strength by 15 dB. |
-7.5 db | Decreases outgoing signal strength by 7.5 dB. |
none | Transmits packets without decreasing outgoing signal strength. |
To select the line code for the fractional T1/T1 module, use the service-module t1 linecode interface configuration command. Use the no form of this command to select the default, which is the B8ZS line code.
service-module t1 linecode {ami | b8zs}
ami | Specifies alternate mark inversion (AMI) as the line code. |
b8zs | Specifies binary 8 zero substitution (B8ZS) as the line code. |
To generate remote alarms (yellow alarms) at the local CSU/DSU or detect remote alarms sent from the remote CSU/DSU, use the service-module t1 remote-alarm-enable interface configuration command. Use the no form of this command to disable remote alarms.
service-module t1 remote-alarm-enableTo specify if the fractional T1/T1 CSU/DSU module enters loopback mode when it receives a loopback code on the line, use the service-module t1 remote-loopback interface configuration command. Use the no form of this command to disable remote loopbacks.
service-module t1 remote-loopback {full | payload} [alternate | v54]
full | Configures the remote loopback code used to transmit or accept CSU loopback requests. |
payload | Configures the loopback code used by the local CSU/DSU to generate or detect payload-loopback commands. |
alternate | (Optional) Transmits a remote CSU/DSU loopback request using a 4-in-5 pattern for loopup and 2-in-3 pattern for loopdown. This is an inverted version of the standard loopcode request. |
v54 | (Optional) Industry standard loopback code. Use this configuration for CSU/DSUs that may not support the Accunet loopup standards. This keyword is used only with a payload request, not a full request. |
To define timeslots that constitute a fractional T1/T1 (FT1/T1) channel, use the service-module t1 timeslots interface configuration command. Use the no form of this command to resume the default setting (all FT1/T1 timeslots transmit at 64 kbps).
service-module t1 timeslots {range | all} [speed {56 | 64}]
range | The DS0 timeslots that constitute the FT1/T1 channel. The range is from 1 to 24, where the first timeslot is numbered 1 and the last timeslot is numbered 24. Specify this field by using a series of subranges separated by commas. |
all | Selects all FT1/T1 timeslots. |
speed | (Optional) Specifies the timeslot speed. |
56 | (Optional) 56 kbps. |
64 | (Optional) 64 kbps. This is the default for all timeslots. |
Posted: Mon Feb 8 13:53:09 PST 1999
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