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To continue your PA-A3-IMA port adapter installation, you must configure the IMA interfaces as IMA groups or as individual ATM interfaces. 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. Enter the privileged level of the EXEC command interpreter with the enable command before you 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:
Step 1 At the user-level EXEC prompt, enter the enable command. The EXEC prompts you for a privileged-level password as follows:
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-mode system prompt (#):
Router#
To configure the new interfaces, proceed to the "Configuring the Interfaces" section.
After you verify that the new PA-A3-IMA is installed correctly (the enabled LED goes on), use the privileged-level configure command to configure the new interfaces. Be prepared with the information you need, such as the following:
If you installed a new PA-A3-IMA 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-A3-IMA that was previously configured, the system recognizes the new interfaces and brings each of them up in their existing configurations.
For a summary of the configuration options available and instructions for configuring interfaces on a PA-A3-IMA, 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.)
This section contains the following subsections:
Before you remove an interface cable or remove a port adapter that you will not replace, use the shutdown command to shut down (disable) the interfaces to prevent anomalies when you reinstall the new or reconfigured interface processor. When you shut down an interface, it is designated administratively down in the show command displays.
Follow these steps to shut down an interface:
Step 1 Enter the privileged level of the EXEC command interpreter (also called enable mode). (See the "Using the EXEC Command Interpreter" section for instructions.)
Step 2 At the privileged-level prompt, enter configuration mode and specify that the console terminal is the source of the configuration subcommands, as follows:
Router# configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router(config)#
Step 3 Shut down interfaces by entering the interface atm subcommand (followed by the interface address of the interface), and then enter the shutdown command. Table 5-1 shows the command syntax.
When you have finished, 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.
Cisco 7120 series routers | interface, followed by the type (atm) and slot/port (port-adapter-slot-number/ | The example is for interface 0 and interface 1 on a port adapter in port adapter slot 3. Router(config-if)# interface atm 3/0 Router(config-if)# shutdown Router(config-if)# interface atm 3/1 Router(config-if)# shutdown Ctrl-Z Router# |
Cisco 7140 series routers | interface, followed by the type (atm) and slot/port (port-adapter-slot-number/ | The example is for interface 0 and interface 1 on a port adapter in port adapter slot 4. Router(config-if)# interface atm 4/0 Router(config-if)# shutdown Router(config-if)# interface atm 4/1 Router(config-if)# shutdown Ctrl-Z Router# |
Cisco 7200 series routers | interface, followed by the type (atm) and slot/port (port-adapter-slot-number/ | The example is for interface 0 and interface 1 on a port adapter in port adapter slot 6. Router(config-if)# interface atm 6/0 Router(config-if)# shutdown Router(config-if)# interface atm 6/1 Router(config-if)# shutdown Ctrl-Z Router# |
VIP2 in Cisco 7500 series routers | interface, followed by the type (atm) and slot/port adapter/port (interface-processor-slot-number/ | The example is for interface 0 on a port adapter in Router(config-if)# interface atm 1/1/1 Router(config-if)# shutdown Router(config-if)# interface atm 1/1/0 Router(config-if)# shutdown Ctrl-Z Router# |
Step 4 Write the new configuration to NVRAM as follows:
Router# copy running-config startup-config [OK] Router#
The system displays an OK message when the configuration has been stored in NVRAM.
Step 5 Verify that the new interfaces are now in the correct state (shut down) using the show interfaces command (followed by the interface type and interface address of the interface) to display the specific interface. Table 5-2 provides examples.
| Platform | Command | Example |
|---|---|---|
Cisco 7120 series routers | show interfaces atm, followed by slot/port (port-adapter-slot-number/ | The example is for interface 0 on a port adapter in port adapter slot 3. Router# show interfaces atm 3/0
Serial 3/0 is administratively down, line protocol is down
[Additional display text omitted from this example] |
Cisco 7140 series routers | show interfaces atm, followed by slot/port (port-adapter-slot-number/ | The example is for interface 0 on a port adapter in port adapter slot 4. Router# show interfaces atm 4/0
Serial 4/0 is administratively down, line protocol is down
[Additional display text omitted from this example] |
Cisco 7200 series routers | show interfaces atm, followed by slot/port (port-adapter-slot-number/ | The example is for interface 0 on a port adapter in port adapter slot 6. Router# show interfaces atm 6/0
Serial 6/0 is administratively down, line protocol is down
[Additional display text omitted from this example] |
VIP2 in Cisco 7500 series routers | show interfaces atm, followed by slot/port adapter/port (interface-processor-slot-number/ | The example is for interface 0 on a port adapter in port adapter slot 1 of a VIP2 in interface processor slot 1. Router# show interfaces atm 1/1/0
Serial 1/1/0 is administratively down, line protocol is down
[Additional display text omitted from this example] |
Step 6 Reenable interfaces by doing the following:
(a) Repeat Step 3 to reenable an interface. Substitute the no shutdown command for the shutdown command.
(b) Repeat Step 4 to write the new configuration to memory.
(c) Repeat Step 5 to verify that the interfaces are in the correct state. Use the show interfaces command followed by the interface type and interface address of the interface.
For complete descriptions of software configuration commands, refer to the publications listed in the "Related Documentation" section.
Following are instructions for a basic configuration. 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. For complete descriptions of configuration subcommands and the configuration options available for ATM interfaces, refer to the appropriate software documentation.
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>
Step 1 Enter configuration mode and specify that the console terminal is the source of the configuration subcommands, as follows:
Router# configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router(config)#
Step 2 Specify the first interface to configure by entering the interface atm subcommand, followed by the interface address of the interface you plan to configure. Table 5-3 gives examples.
| Platform | Command | Example |
|---|---|---|
Cisco 7120 series routers | interface atm, followed by slot/port (port-adapter-slot-number/ | The example is for the first interface of a Router(config)# interface atm 3/0 Router(config-if)# |
Cisco 7140 series routers | interface atm, followed by slot/port (port-adapter-slot-number/ | The example is for the first interface of a Router(config)# interface atm 4/0 Router(config-if)# |
Cisco 7200 series routers and Cisco 7200VXR | interface atm, followed by slot/port (port-adapter-slot-number/ | The example is for the first interface of a Router(config)# interface atm 6/0 Router(config-if)# |
VIP2 in Cisco 7500 series routers | interface atm, followed by slot/port adapter/port (interface-processor-slot-number/ | The example is for the first interface of a Router(config)# interface atm 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) by using the ip address subcommand, as in the following example:
Router(config-if)# ip address 10.0.0.10 255.255.255.0
Step 4 Add any additional configuration subcommands required to enable routing protocols and set the interface characteristics.
Step 5 Configure the port for the type of framing used by entering the framing configuration command. The following example sets the framing type of a T1 port to Extended Superframe (ESF):
Router(config-if)# framing esf
The following example sets the framing type of an E1 port to CRC4:
Router(config-if)# framing crc4
The default is ESF for T1 ports and pcm30adm for E1 ports.
Step 6 Configure transmit attenuation and cable length for applicable T1 links using the lbo configuration command. The example below sets the cable length to long and the gain to 26 dB, with a -15 dB pulse:
Router(config-if)# lbo long gain26 -15db
| Cable Length Range | Value |
|---|---|
0 to 133 ft. (0 to 39.9 m) | 133 |
133 to 266 ft. (39.9 to 79.8 m) | 266 |
266 to 399 ft. (79.8 to 119.7 m) | 399 |
399 to 533 ft. (119.7 to 159.9 m) | 533 |
533 to 655 ft. (159.9 to 196.5 m) | 655 |
Step 7 Set the clock source of the port using the clock source command. The default value is line. The example below shows the clock source being set to internal:
Router(config-if)# clock source internal
Step 8 Set the line code of the port using the linecode command. The example below sets the line code of a T1 port to alternate mark inversion (AMI):
Router(config-if)# linecode ami
The default values are b8zs for T1 and hdb3 for E1.
Step 9 On T1 ports with ESF framing, use the fdl command to enable Facility Data Link (FDL) performance reporting. The default value is no fdl. The example below selects ANSI T1.403 for Facility Data Link support.
Router(config-if)# fdl ansi
Step 10 On E1 ports, set the national and international reserve bits using the national reserve command as in the example below:
Router(config-if)# national reserve 0 1 1 1 1 0
The default values are 1 1 1 1 1 1 1.
Step 11 To enable cell payload scrambling, use the scrambling command. The default value is no scrambling.
Router(config-if)# scrambling cell-payload
Step 12 Set the maximum transmission unit (MTU) size. The range is 64 through 9188 bytes. The default is 4470 bytes. Use the mtu command in interface configuration mode to change the maximum MTU packet size, as shown in the following example:
Router(config-if)# mtu 5260
Step 13 Change the shutdown state to up and enable the interface:
Router(config-int)# no shutdown
Step 14 Repeat Step 2 through Step 12 to configure additional interfaces as required.
Step 15 When you have included all of the configuration subcommands to complete the configuration, press Ctrl-Z to exit configuration mode.
Step 16 Write the new configuration to nonvolatile memory:
Router# copy running-config startup-config [OK] Router#
Each port on the PA-A3-IMA can be configured in one of two ways:
The PA-A3-IMA can be configured with as many as four IMA groups. An IMA group works by inverse multiplexing an ATM cell stream over the multiple physical links of the group and recombining the cells into a single stream at the other end of the connection. The ATM cells are distributed in a round robin fashion over the physical links of the IMA group, demultiplexed at the receiving IMA group, and passed in their original form to the ATM layer (see Figure 1-3). The combined links of an IMA group provide the approximate bandwidth of the sum of the individual link rates.
The following sections include steps for configuring and customizing IMA groups:
An IMA group can function with some of the IMA links disabled. The minimum number of active IMA links needed before the IMA group fails can be set using the ima active-links-minimum command in interface configuration mode. See the "Setting the Minimum Number of Active Links" section for an example of this command.
Create IMA groups by assigning individual IMA ports to the same IMA group number. This defines the port as an IMA link. Use the interface atm slot/port (or processor-slot/port-adapter slot/port for a VIP2) command, followed by the ima-group number command in configuration mode to define an IMA link.
The example below shows the sequence of commands used to define the first five ports (ports 0-4) of the PA-A3-IMA located in slot 1 as IMA links in IMA group number 1, and the last three ports (ports 5-7) as IMA links in IMA group number 2:
Router(config)# interface atm 1/0 Router(config-if)# ima-group 1 Router(config-if)# no shutdown Router(config-if)# exit Router(config)# interface atm 1/1 Router(config-if)# ima-group 1 Router(config-if)# no shutdown Router(config-if)# exit Router(config)# interface atm 1/2 Router(config-if)# ima-group 1 Router(config-if)# no shutdown Router(config-if)# exit
Router(config)# interface atm 1/3 Router(config-if)# ima-group 1 Router(config-if)# no shutdown Router(config-if)# exit Router(config)# interface atm 1/4 Router(config-if)# ima-group 1 Router(config-if)# no shutdown Router(config-if)# exit Router(config)# interface atm 1/5 Router(config-if)# ima-group 2 Router(config-if)# no shutdown Router(config-if)# exit Router(config)# interface atm 1/6 Router(config-if)# ima-group 2 Router(config-if)# no shutdown Router(config-if)# exit Router(config)# interface atm 1/7 Router(config-if)# ima-group 2 Router(config-if)# no shutdown Router(config-if)# exit
After assigning each port on the PA-A3-IMA to an IMA group, create IMA groups by using the interface atm slot/port (or processor-slot/port-adapter slot/port for a VIP2) ima group number command as follows:
Router(config)# interface atm 1/ima1 Router(config-if)# no shutdown Router(config)# interface atm 1/ima2 Router(config-if)# no shutdown
A maximum of four IMA groups can be created for each PA-A3-IMA. When T1 or E1 ports are assigned to an IMA group, the connecting side (remote end) should also be in the IMA mode of operation. T1 or E1 links that are not assigned to any IMA group will function as standard ATM UNI ports.
The following commands set the clock mode, maximum differential delay, frame length, and minimum number of active IMA links allowed in the IMA group. These commands are all entered from interface configuration mode. The examples below show the PA-A3-IMA in port adapter slot 1, interface port 1 in IMA group 1.
The transmit clock mode determines how the individual IMA links in a group are clocked. To set the transmit clock mode for the IMA group, use the ima clock-mode command.
Router(config)# interface atm 1/ima1 Router(config-if)# ima clock-mode common 2
The command arguments are as follows:
The differential-delay-maximum command sets the maximum delay allowed between the reception of packets from adjacent IMA links on the receiving end. When this delay is exceeded, the data stream cannot be reconstructed correctly. The example below shows the maximum differential delay being set to 75 milliseconds:
Router(config)# interface atm 1/ima1 Router(config-if)# ima differential-delay-maximum 75
The ima frame-length command sets the number of cells in the packets sent over the IMA links. The example below shows the size of the packet being set to 128:
Router(config)# interface atm 1/ima1 Router(config-if)# ima frame-length 128
An IMA group can function with some of the IMA links disabled. Set the minimum number of active IMA links needed before the IMA group fails, using the ima active-links-minimum command in interface configuration mode. The example below shows the minimum number of active links being set to 5.
Router(config-if)# ima active-links-minimum 5
A virtual circuit (VC) is a point-to-point connection between remote hosts and routers. A VC is established for each ATM end node with which the router communicates. The characteristics of the VC are established when the VC is created and include the following:
When you assign class of service to a VC for QoS management, the following default priority levels apply:
1. OAM (Operation, Administration, and Maintenance) and signaling (highest level)
2. nrt-VBR (non-real-time variable bit rate)
3. Unspecified bit rate (UBR), ILMI (lowest level)
Each VC supports the following router functions:
Fast switching is the default on all PA-A3-IMA interfaces. All switching features can be turned off with interface configuration commands. Optimum, flow, or CEF switching must be explicitly enabled for each interface.
To use a permanent virtual circuit (PVC), you must configure the PVC in both the router and the ATM switch. PVCs remain active until the circuit is removed from either configuration.
When a PVC is configured, all of the configuration options are passed on to the PA-A3-IMA. You can write these PVCs into nonvolatile RAM (NVRAM); they are used when the system image is reloaded.
Some ATM switches might have point-to-multipoint PVCs that do the equivalent of broadcasting. If a point-to-multipoint PVC exists, it can be used as the sole broadcast PVC for all multicast requests.
To configure a PVC, you first create a PVC and then map a protocol address to it, as described in the following sections:
To create a PVC on the PA-A3-IMA interface, use the atm pvc vcd vpi vci aal-encap [[peak average {burst}]] [oam {seconds}] [{inarp {minutes}] command in interface configuration mode, where the command arguments are as follows:
The atm pvc command creates PVC n and attaches the PVC to VPI and VCI. When you create any PVC, you also specify the ATM adaptation layer (AAL) and encapsulation. The AAL used is specified by aal and encapsulation by encap.
The peak and avg rate selection values are specified in kilobits per second. Omitting peak and average values causes the PVC and those values to default to the line rate, with the peak and average values being equal.
You can configure the PVC for communication with ILMI. Doing so enables the router to receive Simple Network Management Protocol (SNMP) traps and new network prefixes. Refer to the Wide-Area Networking Configuration Guide publication for details.
You can also configure the PVC to send Operation, Administration, and Maintenance (OAM) F5 loopback cells, which verify connectivity on the virtual circuit. The remote end must respond by echoing back such cells.
The following example creates a PVC on interface port 0 with a PA-A3-IMA in a Cisco 7200 series router port adapter slot 2 with VPI 0 and VCI 6. The PVC uses AAL AAL5-MUX with IP:
router(config-if)# interface atm 2/0 router(config-if)# atm pvc 1 0 6 aal5mux ip
This section describes the procedure for mapping a protocol address to a PVC, which is a required task if you are configuring a PVC. The ATM interface supports a static mapping scheme that identifies the ATM addresses of remote hosts or routers. An address is specified as a virtual circuit descriptor (VCD) for a PVC (or a network services access point [NSAP] address for switched virtual circuit operation).
You enter mapping commands as groups. You first create a map list and then associate it with an interface. Begin the following task steps in global configuration mode:
| Step | Command | Purpose | ||
|---|---|---|---|---|
| map-list name | Create a map list by naming it, and enter map-list configuration mode. | ||
| protocol protocol-address atm-vc vcd [broadcast] | Associate a protocol and an address to a specific virtual circuit. | ||
| protocol protocol-address atm-vc vcd [broadcast] | Associate a protocol and an address to a different virtual circuit. | ||
| interface atm slot/port (or processor-slot/ | Specify an ATM interface and enter interface configuration mode. | ||
| atm pvc vcd vpi vci aal-encap [[peak average {burst}]] [oam {seconds}] [{inarp {minutes}] | Create a PVC. | ||
| map-group name
| Associate a map list to an interface. |
A map list can contain multiple map entries, as Step 2 and Step 3 in the preceding task table illustrate. The broadcast keyword specifies that this map entry is to be used when the corresponding protocol sends broadcast packets to the interface (for example, any network routing protocol updates). If you do not specify broadcast, the ATM software is prevented from sending routing protocol updates to the remote hosts.
If you do specify broadcast but do not set up point-to-multipoint signaling, pseudobroadcasting is enabled. To eliminate pseudobroadcasting and set up point-to-multipoint signaling on virtual circuits configured for broadcasting, refer to the Wide-Area Networking Configuration Guide publication.
When the map list is complete, you associate it with an ATM interface by using the name argument (see Step 6).
You can create multiple map lists and associate them with one ATM interface only. You must create different map lists to associate with different interfaces.
For further information on configuring the IMA port adapter for PVCs, refer to the Wide-Area Networking Configuration Guide publication.
ATM switched virtual circuit (SVC) service operates much like X.25 SVC service, although ATM allows much higher throughput. Virtual circuits are created and released dynamically, providing user bandwidth on demand. This service requires a signaling protocol between the router and the switch.
The ATM signaling software provides a method of dynamically establishing, maintaining, and clearing ATM connections at the User-Network Interface (UNI). The ATM signaling software conforms to the ATM Forum UNI 3.0 specification.
In UNI mode, the user is the router, and the network is an ATM switch. This is an important distinction. The Cisco router does not perform ATM-level call routing. Instead, the ATM switch does the ATM call routing, and the router routes packets through the resulting circuit. The router is viewed as the user and the LAN interconnection device at the end of the circuit, and the ATM switch is viewed as the network.
Figure 5-1 illustrates the router position in a basic ATM environment. The router is used primarily to interconnect LANs through an ATM network. Workstation C in Figure 5-1 is connected directly to the destination ATM switch. You can connect not only routers to ATM switches, but also any computer with an ATM interface that conforms to the ATM Forum UNI specification.
To use SVCs, you first configure the PVC that performs SVC call setup and then configure the network service access point address, as described in the following sections:
For further information on configuring the IMA port adapter for SVCs, refer to the Wide-Area Networking Configuration Guide publication.
Unlike X.25 service, which uses in-band signaling (connection establishment done on the same circuit as data transfer), ATM uses out-of-band signaling. One dedicated PVC exists between the router and the ATM switch, over which all SVC call establishment and call termination requests flow. After the call is established, data transfer occurs over the SVC, from router to router. The signaling that accomplishes the call setup and teardown is called Layer 3 signaling or the Q.2931 protocol.
For out-of-band signaling, a signaling PVC must be configured before any SVCs can be set up. In Figure 5-2, a signaling PVC from the source router to the ATM switch is used to set up two SVCs. This is a fully meshed network; workstations A, B, and C all can communicate with one other.
To configure the signaling PVC for all SVC connections, use the atm pvc command in interface configuration mode.
The VPI and VCI values must be configured to be consistent with those of the local switch. The standard value of VPI is 0; the standard value of VCI is 5.
Every ATM interface involved with signaling must be configured with a network service access point (NSAP) address. The NSAP address is the ATM address of the interface and must be unique across the network.
You can do one of the following to configure an NSAP address:
When you configure the ATM NSAP address manually, you must enter the entire address in hexadecimal format; that is, each digit entered represents a hexadecimal digit. To represent the complete NSAP address, you must enter 40 hexadecimal digits in the following format:
XX.XXXX.XX.XXXXXX.XXXX.XXXX.XXXX.XXXX.XXXX.XXXX.XX
Because the interface has no default NSAP address, you must configure the NSAP address for SVCs. To set the ATM interface's source NSAP address, use the atm nsap-address command in interface configuration mode.
The following is an example of an NSAP address assigned to ATM interface 4/0 on a Cisco 7200 series router:
Router(Config-if)# interface atm 4/0 Router(Config-if)# atm nsap-address AB.CDEF.01.234567.890A.BCDE.F012.3456.7890.1234.12
You can display the ATM address for the interface by executing the show interfaces atm command.
You can configure the router to get the NSAP address prefix from the switch; however, the switch must be capable of delivering the NSAP address prefix to the router through ILMI, and the router must be configured with a PVC for communication with the switch through ILMI.
To configure the router to get the NSAP prefix from the switch and use locally entered values for the remaining fields of the address, complete the following tasks in interface configuration mode:
| Step | Command | Purpose | ||
|---|---|---|---|---|
| atm pvc vcd 0 16 ilmi | Configure a PVC for communicating with the switch through ILMI. | ||
| atm esi-address esi.selector | Enter the ESI and Selector fields of the NSAP address. |
In the atm esi-address command, the esi argument is 6 hexadecimal bytes long (12 digits), and the selector argument is 1 hexadecimal byte long (2 digits).
In the following example on a Cisco 7200 series router, the ESI and Selector field values are assigned, and the ILMI PVC is set up:
Router(config-if)# interface atm 4/0 Router(config-if)# atm pvc 2 0 16 ilmi Router(config-if)# atm esi-address 345678901234.12
Cisco implements both the ATM Address Resolution Protocol (ARP) server and ATM ARP client functions described in RFC 1577. RFC 1577 models an ATM network as a logical IP subnetwork on a LAN.
The tasks required to configure classical IP and ARP over ATM depend on whether the environment uses SVCs or PVCs. For further information, refer to the Wide-Area Networking Configuration Guide publication.
After configuring the new interface, use the show commands to display the status of the new interface or all interfaces, and use the ping and loopback commands to check connectivity. This section includes the following subsections:
Table 5-5 demonstrates how you can use the show commands to verify that new interfaces are configured and operating correctly and that the PA-A3-IMA appears in them correctly. Sample displays of the output of selected show commands appear in the sections that follow. Table 5-6 demonstrates how you can use the ATM show commands to verify the current state of the ATM network and connected virtual circuits. For complete command descriptions and examples, refer to the publications listed in the "Related Documentation" section.
| Command | Function | Example |
|---|---|---|
show version | 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 controllers | Displays all the current interface processors and their interfaces | Router# show controllers |
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 atm slot 3/interface-port-number | Displays status information about an ATM interface in a Cisco 7120 series router | Router# show interfaces atm 3/1 |
show interfaces atm slot 4/interface-port-number | Displays status information about an ATM interface in a Cisco 7140 series router | Router# show interfaces atm 4/1
|
show interfaces atm interface-processor-slot-number/port-adapter-slot number/interface-port-number | Displays status information about an ATM interface on a VIP2 in a Cisco 7500 series router | Router# show interfaces atm 3/1/0 |
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 |
| Command | Function | Example |
|---|---|---|
show atm interface atm slot
| Displays ATM-specific information about an ATM interface. | Router# show atm interfaces atm 1/ima1 |
show atm map | Displays the configured list of ATM static maps to remote hosts on an ATM network. | Router# show atm map |
show atm traffic | Displays information about global traffic to and from all ATM networks connected to the router. Displays a list of counters of all ATM traffic on this router. | Router# show atm traffic |
show atm-vc [vcd] | Displays ATM virtual circuit and traffic information about all PVCs and SVCs (or a specific virtual circuit). | Router# show atm-vc |
show atm-vc [vcd] n | Displays ATM virtual circuit information for a particular PVC (where n is the VCD unique index value). | Router# show atm-vc 4 |
show sscop | Displays Service Specific Connection-Oriented Protocol (SSCOP) details for an ATM interface. | Router# show sscop atm 1/ima1 |
show atm arp-server | Displays the ATM ARP server table. | Router# show atm arp-server |
show atm ilmi | Displays ATM ILMI information. | Router# show atm ilmi |
show ima interface atm slot/ima group number | Displays IMA information of an IMA group. | Router# show ima interface atm 1/ima 1 |
show ima interface atm slot/link number | Displays IMA information of an IMA link. | Router# show ima interface atm 1/1 |
show atm interface atm slot
| Displays ATM-specific information about an ATM interface. | Router# show atm interface atm 1/1 |
show atm interface atm slot/ima group number
| Displays port adapter-specific error statistics, such as CRC errors, giants received, no buffers available, framing errors, application or physical layer errors, and packet timeout errors on receive. | Router# show interfaces atm 1/ima1 |
show atm map | Displays the configured list of ATM static maps to remote hosts on an ATM network. | Router# show atm map |
show atm traffic | Displays information about global traffic to and from all ATM networks connected to the router. Displays a list of counters of all ATM traffic on this router. | Router# show atm traffic |
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:
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 version command from a Cisco 7100 series router with the PA-A3-IMA. Router# show version Cisco Internetwork Operating System Software IOS (tm) EGR Software (C7100-JS-M), Version 12.0(6)XE Copyright (c) 1986-1999 by cisco Systems, Inc. Compiled Tue 07-Sep-99 21:42 by rs Image text-base:0x60008900, data-base:0x61360000 ROM:System Bootstrap, Version 12.0(6)XE [100]RELEASE SOFTWARE BOOTFLASH:EGR Software (c7100-BOOT-M), Version 12.0(6)XE (fc1) Router uptime is 10 hours 32 minutes System returned to ROM by power-on System image file is "c7100-js-mz" cisco 7140-2MM3 (EGR) processor with 61440K/69632K bytes of memory. R7000 CPU at 262Mhz, Implementation 39, Rev 1.0, 256KB L2, 2048KB L3 Cache Last reset from power-on Bridging software. X.25 software, Version 3.0.0. SuperLAT software (copyright 1990 by Meridian Technology Corp). TN3270 Emulation software. 2 FastEthernet/IEEE 802.3 interface(s) 11 ATM network interface(s) 125K 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 0x0
Following is an example of the show version command from a Cisco 7200 series router with the PA-A3-IMA. Router# show version Cisco Internetwork Operating System Software IOS (tm) 7200 Software (C7200-J-M), Version 12.0(5)XE Copyright (c) 1986-1998 by cisco Systems, Inc. Compiled Mon 27-Apr-98 16:59 by mwu Image text-base: 0x600088E0, data-base: 0x6083C000 ROM: System Bootstrap, Version 12.0(5)XE [rson 5], RELEASE SOFTWARE (fc1) ROM: 7200 Software (C7200-BOOT-M), Release Version 12.0(5)XE [dx5 118] router uptime is 22 hours, 57 minutes System restarted by reload at 15:56:03 UTC Tue Apr 28 1998 System image file is "c7200-j-mz.atmdx.0424", cisco 7206 (NPE200) processor with 57344K/8192K bytes of memory. R4700 processor, Implementation 33, Revision 1.0 (512KB 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). 4 Ethernet/IEEE 802.3 interfaces. 2 FastEthernet/IEEE 802.3 interfaces. 8 ATM network interfaces. 125K bytes of non-volatile configuration memory. 1024K bytes of packet SRAM memory. 8192K bytes of Flash PCMCIA card at slot 0 (Sector size 128K). 20480K bytes of Flash PCMCIA card at slot 1 (Sector size 128K). 4096K bytes of Flash internal SIMM (Sector size 256K). Configuration register is 0x0
VIP2 in Cisco 7500 Series Routers
Following is an example of the show version command from a Cisco 7500 series router with the PA-A3-IMA. Router# show version Cisco Internetwork Operating System Software IOS (tm) RSP Software (RSP-JV-M), Version 12.0(5)XE Copyright (c) 1986-1999 by cisco Systems, Inc. Compiled Fri 01-Oct-99 18:01 by rs Image text-base:0x60010908, data-base:0x612E2000 ROM:System Bootstrap, Version 12.0(5) RELEASE SOFTWARE(fc1) BOOTFLASH:RSP Software (RSP-BOOT-M), Version 12.0(5) [rs] Router uptime is 1 day, 20 hours, 23 minutes System returned to ROM by abort at PC 0x602B8BE0 System image file is "rsp-jv-mztest" cisco RSP4 (R5000) processor with 131072K/2072K bytes of memory. R5000 CPU at 200Mhz, Implementation 35, Rev 2.1, 512KB L2 Cache Last reset from power-on G.703/E1 software, Version 1.0. G.703/JT2 software, Version 1.0. X.25 software, Version 3.0.0. SuperLAT software (copyright 1990 by Meridian Technology Corp). Bridging software. TN3270 Emulation software. Chassis Interface. 1 VIP2 controller (8 ATM). 1 VIP2 R5K controller (4 Ethernet)(9 ATM). 4 Ethernet/IEEE 802.3 interface(s) 17 ATM network interface(s) 123K bytes of non-volatile configuration memory. 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 7100 series,
Cisco 7200 series, and the interface processor slot in a Cisco 7500 series router with a VIP2.
Following is an example of the show diag slot command that shows a Fast Ethernet port adapter in port adapter slot 4 of a Cisco 7140 series router:
Router# show diag 4
Slot 4:
IMA WAN DS1 Port adapter, 8 ports
Port adapter is analyzed
Port adapter insertion time 00:04:23 ago
EEPROM contents at hardware discovery:
Hardware revision 1.0 Board revision UNKNOWN
Serial number 11560312 Part number 73-3614-01
Test history 0x0 RMA number 00-00-00
EEPROM format version 1
EEPROM contents (hex):
0x20:01 BA 01 00 00 B0 65 78 49 0E 1E 01 00 00 00 00
0x30:04 00 00 00 99 02 17 00 FF FF FF FF FF FF FF FF
Following is an example of the show diag slot command that shows a PA-A3-IMA in port adapter slot 1 of a Cisco 7200 series router:
Router# show diag 1
Slot 1:
IMA WAN DS1 port adapter, 8 ports
Port adapter is analyzed
Port adapter insertion time 1d15h ago
EEPROM contents at hardware discovery:
Hardware revision 1.0 Board revision UNKNOWN
Serial number 10972436 Part number 73-3614-01
Test history 0x0 RMA number 00-00-00
EEPROM format version 1
EEPROM contents (hex):
0x20: 01 BA 01 00 00 A7 6D 14 49 0E 1E 01 00 00 00 00
0x30: 05 00 00 00 98 11 05 00 FF FF FF FF FF FF FF FF
Following is an example of the show diag slot command that shows a PA-A3-IMA in port adapter
slot 0 on a VIP2 in interface processor slot 4:
Router# show diag 4
Slot 4:
Physical slot 4, ~physical slot 0xB, logical slot 4, CBus 0
Microcode Status 0x4
Master Enable, LED, WCS Loaded
Board is analyzed
Pending I/O Status:None
EEPROM format version 1
VIP2 controller, HW rev 2.11, board revision C0
Serial number:11208804 Part number:73-1684-04
Test history:0x00 RMA number:00-00-00
Flags:cisco 7000 board; 7500 compatible
Following is an example of the show interfaces command used with a Cisco 7120 series router and a Cisco 7140 series router.
Router# show interfaces ATM4/0
ATM4/0 is down, line protocol is down
Hardware is IMA PA
MTU 4470 bytes, BW 1544 Kbit, DLY 100 usec,
reliability 0/255, txload 1/255, rxload 1/255
Encapsulation UNKNOWN, loopback not set
Keepalive set (10 sec)
Encapsulation(s):AAL5
512 maximum active VCs, 0 current VCCs
VC idle disconnect time:300 seconds
0 carrier transitions
Last input never, output never, output hang never
Last clearing of "show interface" counters never
Input queue:0/75/0 (size/max/drops); Total output drops:0
Queueing strategy:weighted fair
Output queue:0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/0/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
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 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 packets output, 0 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
Following is an example of the show interfaces command for Cisco 7200 series routers. In this example, the eight ATM interfaces (0-7) are on a PA-A3-IMA in port adapter slot 4.
Router# show interfaces atm 1/4 ATM1/4 is up, line protocol is down Hardware is IMA PA Internet address is 192.168.0.0/24 MTU 4470 bytes, BW 1536 Kbit, DLY 20000 usec, reliablility 255/255, txload 1/255, rxload 1/255 Encapsulation UNKNOWN, loopback not set Keepalive set (10 sec) Encapsulation(s):AAL5 512 maximum active VCs, 0 current VCCs VC idle disconnect time:300 seconds 2 carrier transitions Last input never, output never, output hang never Last clearing of "show interface" counters never Input queue:0/75/0 (size/max/drops); Total output drops:0 Queueing strategy:weighted fair Output queue:0/1000/64/0 (size/max total/threshold/drops) Conversations 0/0/256 (active/max active/max total) Reserved Conversations 0/0 (allocated/max allocated) 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 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort 0 packets output, 0 bytes, 0 underruns 0 output errors, 0 collisions, 0 interface resets 0 output buffer failures, 0 output buffers swapped out
Following is an example of the show interfaces command used with the VIP2. In this example, the ATM interface (5) is on a port adapter in port adapter slot 1 of a VIP2 in interface processor slot 4.
Router# show interfaces atm 4/1/5
ATM4/1/5 is up, line protocol is up
Hardware is cyBus IMA PA
Internet address is 10.0.0.3/24
MTU 4470 bytes, sub MTU 4470, BW 1920 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ATM, loopback not set
Keepalive not supported
Encapsulation(s):AAL5
512 maximum active VCs, 1 current VCCs
VC idle disconnect time:300 seconds
1 carrier transitions
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 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 packets output, 0 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
Use the show interfaces atm slot/ ima group-number command to display all the information specific to an IMA group, as shown in the example below:
Router# show interfaces atm 1/ima1 ATM1/ima1 is up, line protocol is up Hardware is IMA PA Internet address is 192.168.109.1/24 MTU 4470 bytes, sub MTU 4470, BW 1523 Kbit, DLY 20000 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation ATM, loopback not set Keepalive not supported Encapsulation(s):AAL5 1536 maximum active VCs, 1 current VCCs VC idle disconnect time:300 seconds 1 carrier transitions Last input 00:13:56, output 00:13:56, 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 5 packets input, 560 bytes, 0 no buffer Received 0 broadcasts, 0 runts, 0 giants, 0 throttles 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort 5 packets output, 540 bytes, 0 underruns 0 output errors, 0 collisions, 1 interface resets 0 output buffer failures, 0 output buffers swapped out
With the show interfaces type command, use arguments such as the interface type (atm, and so forth), and the port adapter slot and port number (slot/port or slot/port-adapter/port) to display information about a specific interface only.
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 requests 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] indicates that the connection failed.
Following is an example of a successful ping command to a remote device 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.
Proceed to the next section, "Using loopback Commands," to finish checking network connectivity.
With the loopback test, you can detect and isolate equipment malfunctions by testing the connection between the PA-A3-IMA interface and a remote device such as a modem or a CSU/DSU. The loopback subcommand places an interface in loopback mode, which enables test packets that are generated from the ping command to loop through a remote device. If the packets complete the loop, the connection is good. If not, you can isolate a fault to the remote device in the path of the loopback test.
The PA-A3-IMA supports three basic variations of loopback: diagnostic, local, and remote. The diagnostic variation loops the outgoing transmit signal back to incoming receive, and local loopback loops the incoming receive signal back out the transmitter. Remote loopback attempts to set the far end of the T1 interface into loopback mode.
Depending on the mode of the port, issuing the loopback command checks the following path:
To check bit errors using a bit error rate test (BERT), use the following command:
interface atm1/0 bert pattern {2^11 | 2^15 | 2^20 O.153 | 2^20 QRSS | 2^23 | 0s | 1s | alt-0-1} interval minutes
Here 2^11 is an exponential number that represents a pseudorandom repeating pattern that is 2048 bits long, 2^15 is an exponential number that represents a pseudorandom repeating pattern that is 32767 bits long, 2^20 is a pseudorandom repeating pattern that is 1048575 bits long, 2^23 is a pseudorandom repeating pattern that is 8388607 bits long, 0s is a pattern of all zeros (00000000...), 1s is a pattern of all 1s (111111...), and minutes are 1-14400, which designate the time the BERT will run. To stop the BERT, use the optional no form of the command.
In the following example, the pseudorandom pattern 2^20 is sent and repeats for 60 minutes:
Router# bert pattern 2^20 interval 60
The following is an example of running the BERT test and displaying the results from a Cisco 7200 series router:
Router# configure terminal
Router(config)# interface atm 1/0
Router(config-if)# bert pattern 2^20 interval 1
Router(config-if)# end
Router# show controller atm 1/0
Interface ATM1/0 is up
Hardware is IMA PA - E1 (2Mbps)
Lane client mac address is 0090.b1f8.e454
Framer is PMC PM7344, SAR is LSI ATMIZER II
Firmware rev:DG01, ATMIZER II rev:3
idb=0x61C03C58, ds=0x61C0B480, vc=0x61C2C860, pa=0x61BF9880
slot 3, unit 1, subunit 0, fci_type 0x00BB, ticks 658
400 rx buffers:size=512, encap=64, trailer=28, magic=4
linecode is HDB3
E1 Framing Mode: crc.4 adM format
LBO (Cablelength) is long gain43 120db
Facility Alarms:
No Alarm
Bert Information:
state :OFF, pattern :2^20
interval :0, result :IN_SYNC
sync count :1, bit errors :0
kbit count :122871
bit errors since last sync :0
kbit count since last sync :122871
Some display text omitted.
The following debug commands are available to aid in solving ATM network problems.
To create a dump of all protocol packets, use the debug atm packet command. The command displays the contents of the SNAP/NLPID/SMDS header followed by the first 40 bytes of a packet in hexadecimal format.
To display ATM errors, use the debug atm errors command. The command displays information from all detected ATM errors. This includes such errors as encapsulation failures and errors during ATM configuration.
To display ATM events, use the debug atm events command. The command displays event changes to the IMA port adapter. The command also shows reset, VC configurations, and PA-A3-IMA configurations.
To display information about OAM cells, use the debug atm oam command. The command displays the contents of OAM cells as they arrive from the network.
After using a debug command, turn off debugging with the no debug command.
Posted: Mon Aug 7 17:27:35 PDT 2000
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