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To continue your PA-POS-OC3 port adapter installation, you must configure the OC-3 interface. The instructions that follow apply to all supported platforms. The instructions that follow apply to all supported platforms. Minor differences between the platforms—with Cisco IOS software commands—are noted. This chapter contains the following sections:
You modify the configuration of your router through the software command interpreter called the EXEC (also called enable mode). You must enter the privileged level of the EXEC command interpreter with the enable command before you can use the configure command to configure a new interface or change the existing configuration of an interface. The system prompts you for a password if one has been set.
The system prompt for the privileged level ends with a pound sign (#) instead of an angle bracket (>). At the console terminal, use the following procedure to enter the privileged level:
Router> enable
Password:
Step 2 Enter the password (the password is case sensitive). For security purposes, the password is not displayed.
When you enter the correct password, the system displays the privileged-level system prompt (#):
Router#
To configure the new interfaces, proceed to the "Configuring the Interfaces" section.
After you verify that the new PA-POS-OC3 is installed correctly (the enabled LED goes on), use the privileged-level configure command to configure the new interface. Have the following information available:
If you installed a new PA-POS-OC3 or if you want to change the configuration of an existing interface, you must enter configuration mode to configure the new interfaces. If you replaced a PA-POS-OC3 that was previously configured, the system recognizes the new interfaces and brings each of them up in their existing configuration.
For a summary of the configuration options available and instructions for configuring the interface on a PA-POS-OC3, refer to the appropriate configuration publications listed in the "Related Documentation" section.
You execute configuration commands from the privileged level of the EXEC command interpreter, which usually requires password access. Contact your system administrator, if necessary, to obtain password access. (See the "Using the EXEC Command Interpreter" section for an explanation of the privileged level of the EXEC.)
On power up, the OC-3 interface on a new PA-POS-OC3 is shut down. To enable the interface, you must enter the no shutdown command in configuration mode.
When the OC-3 interface is enabled (taken out of shutdown) with no additional arguments, the default interface configuration file parameters are as listed in .
| Parameter1 | Configuration Commands | Default Value |
|---|---|---|
MTU | mtu bytes (no mtu bytes) | 4470 bytes |
Framing | pos framing-sdh (no pos framing-sdh) | SONET framing |
Loopback internal | loop internal (no loop internal) | No internal loopback |
Loopback line | loop line (no loop line) | No line loopback |
Transmit clocking source | clock source internal | Loop timing |
Cyclic redundancy checks | crc 16 | crc 16 |
SONET payload scrambling | pos scramble-atm (no pos scramble-atm) | No scrambling |
| 1These default parameters apply to the PA-POS-OC3 in all supported platforms. |
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Note The outputs that appear in this document may not match the output you receive when running these commands. The outputs in this document are examples only. |
This section describes the procedures for performing a basic configuration: enabling an interface (with the no shutdown command) and specifying IP routing. You might also need to enter other configuration subcommands, depending on the requirements for your system configuration and the protocols you plan to route on the interface.
In the following procedure, press the Return key after each step unless otherwise noted. At any time you can exit the privileged level and return to the user level by entering disable at the prompt as follows:
Router# disable Router>
Router# configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router(config)#
Step 2 Specify the new interface to configure by entering the interface pos command, followed by the interface address of the interface you plan to configure. Table 4-2 gives examples.
| Platform | Command | Example |
|---|---|---|
Catalyst RSM/VIP2 in Catalyst 5000 family switches | interface pos, followed by slot/0 or 1/0 (port-adapter-slot-number/interface- | The example is for the OC-3 interface of a PA-POS-OC3 in port adapter slot 0. Router(config)# interface pos 0/0 Router(config-if)# |
Catalyst 6000 family FlexWAN module in Catalyst 6000 family switches | interface, followed by the type (pos) and mod_num/bay/port (module-slot-number/ | The example is for interface 0 and interface 1 on a port adapter in port adapter bay 0 of a FlexWAN module installed in slot 3. Router(config-if)# interface pos 3/0/0 Router(config-if)# shutdown Ctrl-Z Router# |
Cisco 7200 series routers1 | interface pos, followed by slot/0 (port-adapter-slot-number/ | The example is for the OC-3 interface of a PA-POS-OC3 in port adapter slot 6. Router(config)# interface pos 6/0 Router(config-if)# |
Cisco uBR7223 router | interface pos, followed by 1/0 (port-adapter-slot-number/ | The example is for the OC-3 interface of a PA-POS-OC3 in port adapter slot 1. Router(config)# interface pos 1/0 Router(config-if)# |
Cisco uBR7246 and Cisco uBR7246 VXR routers | interface pos, followed by 1 or 2/0 (port-adapter-slot-number/ | The example is for the OC-3 interface of a PA-POS-OC3 in port adapter slot 2. Router(config)# interface pos 2/0 Router(config-if)# |
VIP2 or VIP4 in Cisco 7000 series or Cisco 7500 series routers | interface pos, followed by slot/0 or 1/0 (interface-processor-slot-number/ | The example is for the OC-3 interface of a PA-POS-OC3 in port adapter slot 1 of a VIP2 in interface processor slot 1. Router(config)# interface pos 1/1/0 Router(config-if)# |
Step 3 Assign an IP address and subnet mask to the interface (if IP routing is enabled on the system) with the ip address configuration subcommand, as in the following example:
Router(config-if)# ip address 10.0.0.10 255.255.255.255
Step 4 Change the shutdown state to up and enable the interface as follows:
Router(config-if)# no shutdown
The no shutdown command passes an enable command to the interface and causes the PA-POS-OC3 to configure itself based on the previous configuration commands sent.
Step 5 Add any additional configuration subcommands required to enable routing protocols and adjust the interface characteristics.
Step 6 After including all of the configuration subcommands to complete your configuration, press Ctrl-Z—hold down the Control key while you press Z—or enter end or exit to exit configuration mode and return to the EXEC command interpreter prompt.
Step 7 Write the new configuration to NVRAM as follows:
Router# copy running-config startup-config [OK] Router#
This completes the procedure for creating a basic configuration.
You can change the default values of all configuration parameters to match your network environment. Use the interface subcommands in the following sections if you need to customize the PA-POS-OC3 configuration:
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Note The interface subcommands that follow function the same regardless of the platform in which your PA-POS-OC3 is installed; however, all of these commands require that you first enter the interface pos command to select the interface that you want to configure. In all of the configuration examples that follow, the interface address argument for the interface pos command is for a Cisco 7200 series router: 3/0 (port adapter slot 3, interface 0). For the appropriate interface pos command syntax to use for your particular platform, see Table 4-2 on page -3. |
The default maximum transmission unit (MTU) size is 4470 bytes. To set the MTU size, enter the mtu bytes command, where bytes is a value in the range of 64 through 4470. (The value 4470 bytes exactly matches the MTU of FDDI and HSSI interfaces for autonomous switching.)
Router(config)# interface pos 3/0 Router(config-if)# mtu 3000
To restore the default of 4470 bytes, enter the no mtu command.
The default framing setting is SONET STS-3c. To configure for SDH STM-1, enter the pos framing-sdh command:
Router(config)# interface pos 3/0 Router(config-if)# pos framing-sdh
To change back to SONET STS-3c, enter the no pos framing-sdh command.
The clocking default specifies that the PA-POS-OC3 uses the recovered receive (RX) clock to provide transmit (TX) clocking (called loop timing). To specify that the PA-POS-OC3 generates the transmit clock internally, enter the clock source internal command:
Router(config)# interface pos 3/0 Router(config-if)# clock source internal
To restore loop timing, enter the no clock source internal command or the clock source line command.
The cyclic redundancy check (CRC) default is for a 16-bit CRC (CRC-CITT). The CRC is an error-checking technique that uses a calculated numeric value to detect errors in transmitted data. The PA-POS-OC3 also supports a 32-bit CRC. The sender of a data frame calculates the frame check sequence (FCS). The sender appends the FCS value to outgoing messages. The receiver recalculates the FCS and compares it to the FCS from the sender. If a difference exists, the receiver assumes that a transmission error occurred and sends a request to the sender to resend the frame. To configure an interface for a 32-bit CRC, enter the crc 32 command:
Router(config)# interface pos 3/0 Router(config-if)# crc 32
To disable the 32-bit CRC and return the interface to the default 16-bit CRC, enter the no crc 32 command.
The default is for SONET payload scrambling disabled. SONET payload scrambling applies a self-synchronous scrambler (x^43+1) to the Synchronous Payload Envelope (SPE) of the OC-3 interface to ensure sufficient bit-transition density.
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Note Both ends of the connection must use the same scrambling algorithm. |
You enable SONET payload scrambling using the pos scramble-atm command. (This command has no keywords or arguments.)
To enable SONET payload scrambling, use the following command sequence:
Router(config)# interface pos 3/0 Router(config-if)# pos scramble-atm Router(config-if)# no shutdown Router(config-if)# end
To verify that SONET payload scrambling is enabled on an interface, enter the show startup-config command. If scrambling is enabled, the following line is displayed in the configuration:
pos scramble-atm
To disable SONET payload scrambling, use the no pos scramble-atm command.
After configuring the new interface, use the show commands to display the status of the new interface or all interfaces, and use the ping command to check connectivity. This section includes the following subsections:
Table 4-1 demonstrates how you can use the show commands to verify that new interfaces are configured and operating correctly and that the PA-POS-OC3 appears in them correctly. Sample displays of the output of selected show commands appear in the sections that follow. For complete command descriptions and examples, refer to the publications listed in the "Related Documentation" section.
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Note The outputs that appear in this document may not match the output you receive when running these commands. The outputs in this document are examples only. |
| Command | Function | Example | ||
|---|---|---|---|---|
show version or | Displays system hardware configuration, the number of each interface type installed, Cisco IOS software version, names and sources of configuration files, and boot images | Router# show version | ||
show diag slot
| Displays types of port adapters installed in your system and information about a specific port adapter slot, interface processor slot, or chassis slot | Router# show diag 2 | ||
show interfaces pos 0 or 1/0 | Displays status information about the OC-3 interface on a Catalyst RSM/VIP2 | Router# show interfaces pos 0/0 | ||
show interfaces pos module-slot-
| Displays status information about the OC-3 interface on a Catalyst 6000 family FlexWAN module | Router# show interfaces pos 3/0/0 | ||
show interfaces pos port-adapter-slot-number/0 | Displays status information about the OC-3 interface in a Cisco 7200 series router | Router# show interfaces pos 3/0 | ||
show interfaces pos 1/0 | Displays status information about the OC-3 interface in a Cisco uBR7223 router | Router# show interfaces pos 1/1 | ||
show interfaces pos 1 or 2/0 | Displays status information about the OC-3 interface in a Cisco uBR7246 or Cisco uBR7246 VXR router | Router# show interfaces pos 1/0 | ||
show interfaces pos interface-processor- | Displays status information about the OC-3 interface on a VIP2 or VIP4 in a Cisco 7000 series or Cisco 7500 series router | Router# show interfaces pos 3/0/0 | ||
show controllers | Displays all the current interface processors and their interfaces | Router# show controllers | ||
show protocols | Displays protocols configured for the entire system and for specific interfaces | Router# show protocols | ||
show running-config | Displays the running configuration file | Router# show running-config | ||
show startup-config | Displays the configuration stored in NVRAM | Router# show startup-config |
If an interface is shut down and you configured it as up, or if the displays indicate that the hardware is not functioning properly, ensure that the interface is properly connected and terminated. If you still have problems bringing up the interface, contact a service representative for assistance. This section includes the following subsections:
Choose the subsection appropriate for your system. Proceed to the "Using the ping Command to Verify Network Connectivity" section when you have finished using the show commands.
Display the configuration of the system hardware, the number of each interface type installed, the Cisco IOS software version, the names and sources of configuration files, and the boot images, using the show version (or show hardware) command.
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Note The outputs that appear in this document may not match the output you receive when running these commands. The outputs in this document are examples only. |
Following is an example of the show version command from a Catalyst 5000 family switch with the PA-POS-OC3:
Router# show version Cisco Internetwork Operating System Software IOS (tm) C5RSM Software (C5RSM-JSV-M), Version 12.0(3)T Copyright (c) 1986-1997 by cisco Systems, Inc. Compiled Tue 24-Jun-97 17:09 by biff Image text-base: 0x600108E0, data-base: 0x6095E000 ROM: System Bootstrap, Version 11.2(15707) BOOTFLASH: C5RSM Software (C5RSM-JSV-M), Version 11.2 Router uptime is 17 hours, 17 minutes System restarted by reload System image file is "c5rsm-jsv-mz.7P", booted via tftp cisco RSP2 (R4700) processor with 32768K bytes of memory. R4700 processor, Implementation 33, Revision 1.0 Last reset from power-on G.703/E1 software, Version 1.0. SuperLAT software (copyright 1990 by Meridian Technology Corp). Bridging software. X.25 software, Version 2.0, NET2, BFE and GOSIP compliant. TN3270 Emulation software. [Additional display text omitted from this example] 1 VIP2 controller (1 POS). 1 Packet over SONET network interface(s) [Additional display text omitted from this example] 123K bytes of non-volatile configuration memory. 16384K bytes of Flash PCMCIA card at slot 0 (Sector size 128K). 8192K bytes of Flash internal SIMM (Sector size 256K). Configuration register is 0x100
Following is an example of the show version command for a Catalyst 6000 family FlexWAN module:
Router# show version Cisco Internetwork Operating System Software IOS (tm) MSFC Software (C6MSFC-JSV-M), Experimental Version 12.1(20000209:134547) [amcrae-cosmos_e_nightly 163] Copyright (c) 1986-2000 by cisco Systems, Inc. Compiled Wed 09-Feb-00 07:10 by Image text-base: 0x60008900, data-base: 0x6140E000 ROM: System Bootstrap, Version 12.0(3)XE, RELEASE SOFTWARE const-uut uptime is 5 minutes System returned to ROM by reload System image file is "bootflash:c6msfc-jsv-mz.Feb9" cisco Cat6k-MSFC (R5000) processor with 122880K/8192K bytes of memory. Processor board ID SAD03457061 R5000 CPU at 200Mhz, Implementation 35, Rev 2.1, 512KB L2 Cache Last reset from power-on Channelized E1, Version 1.0. Bridging software. X.25 software, Version 3.0.0. SuperLAT software (copyright 1990 by Meridian Technology Corp). TN3270 Emulation software. Primary Rate ISDN software, Version 1.1. 6 FlexWAN controllers (13 Serial)(8 E1)(8 T1)(2 HSSI)(2 ATM)(1 Channelized T3)(1 Channelized E3)(2 POS). 1 Virtual Ethernet/IEEE 802.3 interface(s) 17 Serial network interface(s) 2 HSSI network interface(s) 2 ATM network interface(s) 2 Packet over SONET network interface(s) 1 Channelized T3 port(s) 1 Channelized E3 port(s) 123K bytes of non-volatile configuration memory. 4096K bytes of packet SRAM memory. 16384K bytes of Flash internal SIMM (Sector size 256K). Configuration register is 0x1
Following is an example of the show version command from a Cisco 7200 series router with the PA-POS-OC3:
Router# show version Cisco Internetwork Operating System Software IOS (tm) 7200 Software (C7200-J-M), Version 11.1(21)CC [biff 105] Copyright (c) 1986-1996 by cisco Systems, Inc. Compiled Sun 04-Aug-96 06:00 by biff Image text-base: 0x600088A0, data-base: 0x605A4000 ROM: System Bootstrap, Version 11.1(7)CA RELEASED SOFTWARE Router uptime is 4 hours, 22 minutes System restarted by reload System image file is "c7200-j-mz", booted via slot0 cisco 7206 (NPE150) processor with 12288K/4096K bytes of memory. R4700 processor, Implementation 33, Revision 1.0 (Level 2 Cache) Last reset from power-on Bridging software. SuperLAT software (copyright 1990 by Meridian Technology Corp). X.25 software, Version 2.0, NET2, BFE and GOSIP compliant. TN3270 Emulation software (copyright 1994 by TGV INC). Chassis Interface. [Additional display text omitted from this example] 1 Packet over SONET network interface(s) [Additional display text omitted from this example] 125K bytes of non-volatile configuration memory. 1024K bytes of packet SRAM memory. 20480K bytes of Flash PCMCIA card at slot 0 (Sector size 128K). 8192K bytes of Flash internal SIMM (Sector size 256K). Configuration register is 0x2
Following is an example of the show version command from a Cisco 7500 series router with the PA-POS-OC3:
Router# show version Cisco Internetwork Operating System Software IOS (tm) GS Software (RSP-A),Version 12.0(8)S [biff 125]Copyright (c) 1986-1999 by cisco Systems, Inc.Compiled Wed 06-Oct-99 14:30 by biffImage text-base: 0x600108A0, data-base: 0x60952000 ROM: System Bootstrap, Version 11.1(2) [biff], RELEASE SOFTWARE BOOTFLASH:RSP Software (RSP-BOOT-M) RELEASE SOFTWARE (fc1) Router uptime is 5 days, 4 minutes System restarted by reload System image file is "rsp-jv-mz", booted via slot0 cisco RSP2 (R4600) processor with 16384K bytes of memory. R4600 processor, Implementation 32, Revision 2.0 Last reset from power-on G.703/E1 software, Version 1.0. SuperLAT software (copyright 1990 by Meridian Technology Corp). Bridging software. X.25 software, Version 2.0, NET2, BFE and GOSIP compliant. TN3270 Emulation software (copyright 1994 by TGV Inc). Chassis Interface. [Additional display text omitted from this example] 1 VIP4 RM7000 controller (1 POS). 1 Packet over SONET network interface(s) [Additional display text omitted from this example] 125K bytes of non-volatile configuration memory. 8192K bytes of Flash PCMCIA card at slot 0 (Sector size 128K). 8192K bytes of Flash internal SIMM (Sector size 256K). Configuration register is 0x0
Display the types of port adapters installed in your system (and specific information about each) using the show diag slot command, where slot is the port adapter slot in a Cisco 7200 series, and Cisco uBR7200 series router and the interface processor slot in a Cisco 7000 series or Cisco 7500 series router with a VIP2 or VIP4. (The slot argument is not required for the PA-POS-OC3 installed on the Catalyst RSM-VIP2 in Catalyst 5000 family switches.)
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Note The outputs that appear in this document may not match the output you receive when running these commands. The outputs in this document are examples only. |
Following is an example of the show diag command for a PA-POS-OC3 on a Catalyst RSM/VIP2:
Router# show diag
Slot 3:
Physical slot 0, ~physical slot 0xF, logical slot 0, CBus 0
Microcode Status 0x4
Master Enable, LED, WCS Loaded
Board is analyzed
Pending I/O Status: None
EEPROM format version 1
VIP2 R5K controller, HW rev 2.01, board revision B0
Serial number: 06747824 Part number: 73-2167-03
Test history: 0x00 RMA number: 00-00-00
Flags: cisco 7000 board; 7500 compatible
EEPROM contents (hex):
0x20: 01 1E 02 01 00 66 F6 B0 49 08 77 03 00 00 00 00
0x30: 58 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Slot database information:
Flags: 0x4 Insertion time: 0x245C (00:06:51 ago)
Controller Memory Size: 128 MBytes DRAM, 4096 KBytes SRAM
PA Bay 0 Information:
POS PA, 1 port, PA-POSSW-MM
EEPROM format version 1
HW rev 2.00, Board revision A0
Serial number: 012345 Part number: 73-3192-02
Following is an example of the show diag command that shows a PA-POS-OC3 in port adapter bay 0 on a Catalyst 6000 family FlexWAN module in module slot 4:
Router# show diag 4 Slot 4: Logical_index 9 Board is analyzed ipc ready FlexWAN controller Slot database information: Flags: 0x2004 Insertion time: unknown CWAN Controller Memory Size: Unknown PA Bay 1 Information: POS PA, 1 port EEPROM format version 0 HW rev 0.00, Board revision UNKNOWN Serial number: 00000000 Part number: 00-0000-00
For complete command descriptions and examples for the Catalyst 6000 family FlexWAN module, refer to the publications listed in the "Related Documentation" section. Proceed to the "Using the ping Command to Verify Network Connectivity" section.
Following is an example of the show diag slot command for a PA-POS-OC3 in port adapter slot 3 of a Cisco 7200 series router:
Router# show diag 3
Slot 3:
OC3-POS (multimode) port adapter, 1 port
Port adapter is analyzed
Port adapter insertion time 00:09:13 ago
Hardware revision 2.0 Board revision A0
Serial number 012340 Part number 73-3192-02
Test history 0x0 RMA number 00-00-00
EEPROM format version 1
EEPROM contents (hex):
0x20: 01 96 02 00 00 92 71 38 49 0C 78 02 00 00 00 00
0x30: 02 00 00 00 FF FF FF FF FF FF FF FF FF FF FF FF
Following is an example of the show diag slot command for a PA-POS-OC3 in port adapter slot 0 of a VIP4 in interface processor slot 8:
Router# show diag 8
Slot 8:
Physical slot 8, ~physical slot 0x7, logical slot 8, CBus 0
Microcode Status 0x4
Master Enable, LED, WCS Loaded
Board is analyzed
Pending I/O Status:None
EEPROM format version 2
VIP4 RM7000 controller, HW rev 2.01, board revision A0
Serial number:11500489 Part number:211-18700-71
Test history:0x02 RMA number:00-00-00
Flags: unknown flags 0x7F; 7500 compatible
EEPROM contents (hex):
0x20:02 22 02 01 00 AF 7B C9 D3 49 0C 47 02 00 00 00
0x30:02 3A 0C FF FF FF FF FF FF FF FF FF FF FF FF FF
Slot database information:
Flags:0x4 Insertion time:0x3E39D4C (00:00:48 ago)
Controller Memory Size:64 MBytes DRAM, 65536 KBytes SRAM
PA Bay 0 Information:
POS PA, 1 port, PA-POSSW-MM
EEPROM format version 1
HW rev 2.00, Board revision A0
Serial number:123451 Part number:73-3192-02
For complete descriptions of interface subcommands and the configuration options available for interfaces on the Catalyst RSM/VIP2, Cisco 7200 routers, Cisco uBR7200 series routers, and VIP2 or VIP4, refer to the publications listed in the "Related Documentation" section.
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Note The ouputs that appear in this document may not match the output you receive when running these commands. The outputs in this document are examples only. |
Following is an example of the show interfaces PA-POS-OC3 in port adapter slot 1 of a Catalyst RSM/VIP2:
Router# show interfaces pos 1/0
POS1/0 is administratively down, line protocol is down
Hardware is cyBus Packet over Sonet
MTU 4470 bytes, BW 155000 Kbit, DLY 100 usec, rely 255/255, load 1/255
Encapsulation HDLC, loopback not set, keepalive set (10 sec)
Last input never, output never, output hang never
Last clearing of "show interface" counters never
Queueing strategy: fifo
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants 0 parity
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 packets output, 0 bytes, 0 underruns
0 output errors, 0 applique, 0 interface resets
0 output buffers copied, 0 interrupts, 0 failures, 0 carrier transitions
Following is an example of the show interfaces command for a PA-POS-OC3 in port adapter bay 1 of a Catalyst 6000 family FlexWAN module in module slot 4:
Router# show interfaces pos 4/1/0
POS4/1/0 is up, line protocol is up
Hardware is Packet over Sonet
MTU 4470 bytes, BW 155000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation HDLC, crc 16, loopback not set
Keepalive not set
Scramble disabled
Last input never, output never, output hang never
Last clearing of "show interface" counters never
Queueing strategy: fifo
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 parity
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
6 packets output, 1998 bytes, 0 underruns
0 output errors, 0 applique, 1 interface resets
0 output buffer failures, 0 output buffers swapped out
1 carrier transitions
Display the configuration of the system hardware, the number of each interface type installed, the Cisco IOS software version, the names and sources of configuration files, and the boot images, using the show version (or show hardware) command.
Following is an example of the show interfaces command for a PA-POS-OC3 in port adapter slot 3 of a Cisco 7200 series router:
Router# show interfaces pos 3/0
POS3/0 is administratively down, line protocol is down
Hardware is Packet over Sonet
MTU 4470 bytes, BW 155000 Kbit, DLY 100 usec, rely 255/255, load 1/255
Encapsulation HDLC, loopback not set, keepalive set (10 sec)
Last input never, output never, output hang never
Last clearing of "show interface" counters never
Queueing strategy: fifo
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants
0 parity
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
10 packets output, 234 bytes, 0 underruns
0 output errors, 0 applique, 0 interface resets
0 output buffers copied, 0 interrupts, 0 failures
0 carrier transitions
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Note For the Cisco 7206VXR and Cisco 7206 router shelves, the show interfaces pos command requires a shelf number in the format show interfaces pos shelf-number/port-adapter-slot-number/ interface-port. (For example the command show interfaces pos 5/3/0 specifies the OC-3 interface of a PA-POS-OC3 in port adapter slot 3 of router shelf 5.) |
Following is an example of the show interfaces command for PA-POS-OC3 in port adapter slot 0 of a VIP4 in interface processor slot 8 of a Cisco 7500 series router:
Router# show interfaces 8/0/0
POS8/0/0 is administratively down, line protocol is down
Hardware is cyBus Packet over Sonet
MTU 4470 bytes, BW 155000 Kbit, DLY 100 usec, rely 255/255, load 1/255
Encapsulation HDLC, crc 16, loopback not set
Keepalive set (10 sec)
Scramble disabled
Last input never, output never, output hang never
Last clearing of "show interface" counters never
Queueing strategy:fifo
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles, 0 parity
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 packets output, 0 bytes, 0 underruns
0 output errors, 0 applique, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
Proceed to the next section "Using the ping Command to Verify Network Connectivity," to check network connectivity between your network and the PA-POS-OC3 and router or switch.
Using the ping command, you can verify that an interface port is functioning properly. This section provides a brief description of this command. Refer to the publications listed in the "Related Documentation" section for detailed command descriptions and examples.
The ping command sends echo request packets out to a remote device at an IP address that you specify. After sending an echo request, the system waits a specified time for the remote device to reply. Each echo reply is displayed as an exclamation point (!) on the console terminal; each request that is not returned before the specified timeout is displayed as a period (.). A series of exclamation points (!!!!!) indicates a good connection; a series of periods (.....) or the messages [timed out] or [failed] indicate a bad connection.
Following is an example of a successful ping command to a remote server with the address 10.0.0.10:
Router# ping 10.0.0.10 <Return> Type escape sequence to abort. Sending 5, 100-byte ICMP Echoes to 10.0.0.10, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 1/15/64 ms Router#
If the connection fails, verify that you have the correct IP address for the destination and that the device is active (powered on), and repeat the ping command.
The loopback test allows you to troubleshoot, detect, and isolate equipment malfunctions by testing the connection between the OC-3 interface and a remote device. The loop subcommand places an interface in internal loopback (also called local loopback) or line loopback mode, which enables test packets that are generated from the ping command to loop through a remote device or a cable. If the packets complete the loop, the connection is good. If not, you can isolate a fault to the remote device or the cable in the path of the loopback test.
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Note The interface subcommands that follow function the same regardless of the platform in which your PA-POS-OC3 is installed; however, these commands require that you first enter the interface pos command to select the interface that you want to configure. In the configuration examples that follow, the interface address argument for the interface pos command is for a Cisco 7200 series router: 3/0 (port adapter slot 3, interface 0). For the appropriate interface pos command syntax to use for your particular platform, see Table 4-2 on page -3. |
The default loopback setting is for no loopback. With internal (or local) loopback, packets from the router are looped back in the framer. Outgoing data gets looped back to the receiver without actually being transmitted. Internal loopback is useful for checking that the PA-POS-OC3 is working. To configure an interface for internal loopback, enter the loop internal command:
Router(config)# interface pos 3/0 Router(config-if)# loop internal
To disable internal loopback, enter the no loop internal command.
The default loopback setting is for no loopback. With line loopback, the receive (RX) fiber is logically connected to the transmit (TX) optical fiber cable so that packets from the remote router are looped back to it. Incoming data gets looped around and retransmitted without actually being received. To configure an interface for line loopback, enter the loop line command:
Router(config)# interface pos 3/0 Router(config-if)# loop line
To disable line loopback, enter the no loop line command.
For complete descriptions of interface subcommands and the configuration options available for Cisco 7200, Cisco uBR7200 series, and VIP2 or VIP4 interfaces, refer to the publications listed in the "Related Documentation" section.
The only error messages you should see are of the following type and format:
%POS-0-MSG:%DEBUGGER-0-STACK_DATA8: 00E0 FFFFFFFF 80057F50 00000000 00000000 FFFFFFFF 80032CD4 00000000 00000000
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Note Contact the Technical Assistance Center (TAC) for assistance with this error message. To contact the TAC, see the "Related Documentation" section. |
This section provides an example of two sample configuration files from two Cisco 7200 series routers or two Cisco 7000 series or Cisco 7500 series routers (with a VIP2 or VIP4) connected back-to-back through their OC-3 interfaces.
First router:
interface POS 3/0 <for a PA-POS-OC3 in a Cisco 7200 series router> interface POS 3/0/0 <for a PA-POS-OC-3 on a VIP2 or VIP4> ip address 10.0.0.10 no keepalive pos internal-clock
Second router:
interface POS 3/0 <for a PA-POS-OC3 in a Cisco 7200 series router> interface POS 3/0/0 <for a PA-POS-OC3 on a VIP2 or VIP4> ip address 10.0.0.20 no keepalive
To connect two PA-POS-OC3-equipped routers back to back, attach the appropriate cable between the OC-3 interface port on each PA-POS-OC3.
By default, the PA-POS-OC3 uses loop-timing mode. To specify that the PA-POS-OC3 generates the transmit clock internally, add the clock source internal command to your configuration (see the first router example above: pos internal-clock).
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Note For back-to-back operation, at least one of the OC-3 interfaces must be configured to supply its internal clock to the line. |
Posted: Tue Sep 26 08:17:01 PDT 2000
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