PA-MC-E3 Multi-Channel E3 Port Adapter Installation and Configuration
Configuring the PA-MC-E3 Multi-Channel E3 Port Adapter
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Configuring the PA-MC-E3

Table Of Contents

Configuring the PA-MC-E3

Using the EXEC Command Interpreter

Configuring the Interfaces

Shutting Down an Interface

Performing a Basic Interface Configuration

Configuring the PA-MC-E3

Configuring the E3 Controller

Configuring E1 Lines

Configuring the Serial Interface

Configuration Example

Configuring a BERT on an E1 Line

Sending a BERT Pattern on an E1 Line

Viewing BERT Results

Configuring Cyclic Redundancy Checks

Checking the Configuration

Using show Commands to Verify the New Interface Status

Using the show version or show hardware Commands

Using the show diag Command

Using the show interfaces Command

Using the ping Command to Verify Network Connectivity

Using loopback Commands


Configuring the PA-MC-E3


To continue your PA-MC-E3 port adapter installation, you must configure the serial 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:

Using the EXEC Command Interpreter

Configuring the Interfaces

Checking the Configuration

Using the EXEC Command Interpreter

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:


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-level system prompt (#):

Router#


To configure the new interfaces, proceed to the "Configuring the Interfaces" section.

Configuring the Interfaces

After you verify that the new PA-MC-E3 is installed correctly (the ENABLED LED goes on), use the privileged-level configure command to configure the new interfaces. Have the following information available:

Protocols you plan to route on each new interface

IP addresses, if you plan to configure the interfaces for IP routing

Bridging protocols you plan to use

Clock timing source you plan to use for each new interface and clock speeds for external timing.

If you installed a new PA-MC-E3 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-MC-E3 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-MC-E3, refer to the appropriate configuration publications listed in the "Related Documentation" section on page viii.

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:

Shutting Down an Interface

Performing a Basic Interface Configuration

Configuring the PA-MC-E3

Configuring a BERT on an E1 Line

Configuring Cyclic Redundancy Checks

Shutting Down an Interface

Before you remove an interface that you will not replace, replace a coaxial serial cable, or replace port adapters, 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 serial subcommand (followed by the interface address of the interface), and then enter the shutdown command.

Table 4-1 shows the shutdown command syntax for the supported platforms.

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.

Table 4-1 Syntax of the shutdown Command for the Supported Platforms 

Platform
Command
Example

Catalyst RSM/VIP2 in Catalyst 5000 family switches

interface, followed by the type (serial) and slot/port (port-adapter-slot-number/
interface-port-number)

shutdown

The example is for interface 0 on a port adapter in port adapter slot 1.

Router(config-if)# interface serial 1/0
Router(config-if)# shutdown
Ctrl-Z
Router#

Catalyst 6000 family FlexWAN module in Catalyst 6000 family switches

interface, followed by the type (serial) and mod-num/bay/port (module-slot-number/
port-adapter-bay-number/
interface-port-number)

shutdown

The example is for interface 0 on a port adapter in port adapter bay 0 of a FlexWAN module installed in slot 3.

Router(config-if)# interface serial 3/0/0
Router(config-if)# shutdown
Ctrl-Z
Router#

Cisco 7200 series routers and Cisco 7200 VXR routers

interface, followed by the type (serial) and slot/port (port-adapter-slot-number/
interface-port-number)

shutdown

The example is for interface 0 on a port adapter in port adapter slot 6.

Router(config-if)# interface serial 6/0
Router(config-if)# shutdown
Ctrl-Z
Router#

Cisco uBR7223 router

interface, followed by the type (serial) and slot/port (port-adapter-slot-number/
interface-port-number)

shutdown

The example is for interface 0 on a port adapter in port adapter slot 1.

Router(config-if)# interface serial 1/0
Router(config-if)# shutdown
Ctrl-Z
Router#

Cisco uBR7246 router

interface, followed by the type (serial) and slot/port (port-adapter-slot-number/
interface-port-number)

shutdown

The example is for interface 0 on a port adapter in port adapter slot 2.

Router(config-if)# interface serial 2/0
Router(config-if)# shutdown
Ctrl-Z
Router#

Cisco7201 router

interface, followed by the type (serial) and slot/port (port-adapter-slot-number/
interface-port-number)

shutdown

The example is for interface 0 on a port adapter in port adapter slot 1.

Router(config-if)# interface serial 1/0
Router(config-if)# shutdown
Ctrl-Z
Router#

Cisco7301 router

interface, followed by the type (serial) and slot/port (port-adapter-slot-number/
interface-port-number)

shutdown

The example is for interface 0 on a port adapter in port adapter slot 1.

Router(config-if)# interface serial 1/0
Router(config-if)# shutdown
Ctrl-Z
Router#

Cisco 7304 PCI Port Adapter Carrier Card in a Cisco 7304 router

interface, followed by the type (serial) and slot/port (module-slot-number/
interface-port-number)

shutdown

The example is for interface 0 on a port adapter in a Cisco 7304 PCI Port Adapter Carrier Card in module slot 3 of a Cisco 7304 router.

Router(config-if)# interface serial 3/0 
Router(config-if)# shutdown 
Ctrl-Z 
Router# 

VIP in Cisco 7000 series routers or Cisco 7500 series routers

interface, followed by the type (serial) and slot/port adapter/port (interface-processor-slot-number
port-adapter-slot-number/
interface-port-number)

shutdown

The example is for interface 0 on a port adapter in port adapter slot 1 of a VIP installed
in interface processor slot 1.

Router(config-if)# interface serial 1/1/0
Router(config-if)# shutdown
Ctrl-Z
Router#


Note If you need to shut down additional interfaces, enter the interface serial command (followed by the interface address of the interface) for each of the interfaces on your port adapter. Use the no shutdown command to enable the interface.


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 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 4-2 provides examples of the show interfaces serial command for supported platforms.

Table 4-2 Examples of the show interfaces serial Command for the Supported Platforms 

Platform
Command
Example

Catalyst RSM/VIP2 in Catalyst 5000 family switches

show interfaces serial, followed by slot/port (port-adapter-slot-number/
interface-port-number)

The example is for interface 0 on a port adapter in port adapter slot 1.

Router# show interfaces serial 1/0

Serial 1/0 is administratively down, 
line protocol is down

[Additional display text omitted from 
this example]

Catalyst 6000 family FlexWAN module in Catalyst 6000 family switches

show interfaces serial, followed by mod-num/bay/port (module-slot-number/
port-adapter-bay-number/
interface-port-number)

The example is for interface 0 on a port adapter in port adapter bay 0 of a FlexWAN module installed in slot 3.

Router# show interfaces serial 3/0/0

Serial 3/0/0 is administratively down, 
line protocol is down

[Additional display text omitted from 
this example]

Cisco 7200 series routers and Cisco 7200 VXR routers

show interfaces serial, followed by slot/port (port-adapter-slot-number/
interface-port-number)

The example is for interface 0 on a port adapter in port adapter slot 6.

Router# show interfaces serial 6/0

Serial 6/0 is administratively down, 
line protocol is down

[Additional display text omitted from 
this example]

Cisco 7201 router

show interfaces serial, followed by slot/port (port-adapter-slot- number/
interface-port-number)

The example is for interface 0 on a port adapter in port adapter slot 1.

Router# show interfaces serial 1/0

Serial 1/0 is administratively down, 
line protocol is down

[Additional display text omitted from 
this example]

Cisco uBR7223 router

show interfaces serial, followed by slot/port (port-adapter-slot- number/
interface-port-number)

The example is for interface 0 on a port adapter in port adapter slot 1.

Router# show interfaces serial 1/0

Serial 1/0 is administratively down, 
line protocol is down

[Additional display text omitted from 
this example]

Cisco uBR7246 router

show interfaces serial, followed by slot/port (port-adapter-slot-number/
interface-port-number)

The example is for interface 0 on a port adapter in port adapter slot 2.

Router# show interfaces serial 2/0

Serial 2/0 is administratively down, 
line protocol is down

[Additional display text omitted from 
this example]

Cisco 7301 router

show interfaces serial, followed by slot/port (port-adapter-slot- number/
interface-port-number)

The example is for interface 0 on a port adapter in port adapter slot 1.

Router# show interfaces serial 1/0

Serial 1/0 is administratively down, 
line protocol is down

[Additional display text omitted from 
this example]

Cisco 7304 PCI Port Adapter Carrier Card in a Cisco 7304 router

show interfaces serial, followed by slot/port (module-slot-number/
interface-port-number)

The example is for interface 0 on a port adapter in a Cisco 7304 PCI Port Adapter Carrier Card in module slot 3 of a Cisco 7304 router.

Router(config-if)# show interfaces 
serial 3/0
 
Serial 3/0 is administratively down, 
line protocol is down 
 
[Additional display text omitted from 
this example]

VIP in Cisco 7000 series routers or Cisco 7500 series routers

show interfaces serial, followed by slot/port adapter/port (interface-processor-slot-number/
port-adapter-slot-number/
interface-port-number)

The example is for interface 0 on a port adapter in port adapter slot 1 of a VIP in interface processor slot 1.

Router# show interfaces serial 1/1/0

Serial 1/1/0 is administratively down, 
line protocol is down

[Additional display text omitted from 
this example]

Step 6 Re-enable interfaces by doing the following:

a. Repeat Step 3 to re-enable an interface. Substitute the no shutdown command for the shutdown command.

b. Repeat Step 4 to write the new configuration to memory. Use the copy running-config startup-config command.

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 on page viii.

Performing a Basic Interface Configuration

Following are instructions for a basic configuration, which include enabling an interface, specifying IP routing, and setting up external timing on a DCE interface. 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 serial 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 serial subcommand, followed by the interface address of the interface you plan to configure.

Table 4-3 provides examples of the interface serial subcommand for the supported platforms.

Table 4-3 Examples of the interface serial Subcommand for Supported Platforms 

Platform
Command
Example

Catalyst RSM/VIP2 in Catalyst 5000 family switches

interface serial, followed by slot/port (port-adapter-slot-number/
interface-port-number)

The example is for interface 0 of a port adapter in port adapter slot 0.

Router(config)# interface serial 0/0
Router(config-if)#

Catalyst 6000 family FlexWAN module in Catalyst 6000 family switches

interface serial, followed by mod-num/bay/port (module-slot-number/
port-adapter-bay-number/
interface-port-number)

The example is for interface 0 of a port adapter in port adapter bay 0 of a FlexWAN module installed in slot 3.

Router(config)# interface serial 3/0/0
Router(config-if)#

Cisco 7200 series routers and Cisco 7200 VXR routers

interface serial, followed by slot/port (port-adapter-slot-number/
interface-port-number)

The example is for interface 0 of a port adapter in port adapter slot 6.

Router(config)# interface serial 6/0
Router(config-if)#

Cisco 7201 router

interface serial, followed by slot/port (port-adapter-slot-number/
interface-port-number)

The example is for interface 0 of a
port adapter in port adapter slot 1.

Router(config)# interface serial 1/0
Router(config-if)#

Cisco uBR7223 router

interface serial, followed by slot/port (port-adapter-slot-number/
interface-port-number)

The example is for interface 0 of a
port adapter in port adapter slot 1.

Router(config)# interface serial 1/0
Router(config-if)#

Cisco uBR7246 router

interface serial, followed by slot/port (port-adapter-slot-number/
interface-port-number)

The example is for interface 0 of a
port adapter in port adapter slot 2.

Router(config)# interface serial 2/0
Router(config-if)#

Cisco 7301 router

interface serial, followed by slot/port (port-adapter-slot-number/
interface-port-number)

The example is for interface 0 of a
port adapter in port adapter slot 1.

Router(config)# interface serial 1/0
Router(config-if)#

Cisco 7304 PCI Port Adapter Carrier Card in a Cisco 7304 router

interface serial, followed by slot/port (module-slot-number/
interface-port-number)

The example is for interface 0 on a port adapter in a Cisco 7304 PCI Port Adapter Carrier Card in module slot 3 of a Cisco 7304 router.

Router(config-if)# interface serial 3/0 
Router(config-if)# 

VIP in Cisco 7000 series routers or Cisco 7500 series routers

interface serial, followed by slot/port adapter/port (interface-processor-slot-number/
port-adapter-slot-number/
interface-port-number)

The example is for interface 0 of a
port adapter in port adapter slot 1 of a VIP in interface processor slot 1.

Router(config)# interface serial 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 10.0.0.0 10.255.255.255 

Step 4 Add any additional configuration subcommands required to enable routing protocols and set the interface characteristics.

Step 5 Re-enable the interfaces using the no shutdown command. (See the "Shutting Down an Interface" section.)

Step 6 Configure all additional port adapter interfaces as required.

Step 7 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 8 Write the new configuration to NVRAM as follows:

Router# copy running-config startup-config
[OK]
Router#

Configuring the PA-MC-E3

Following are the procedures to configure the E3 controller, E1 lines, and serial interfaces for the PA-MC-E3. Note that all of these procedures are optional except for "Configuring E1 Lines":

Configuring the E3 Controller

Configuring E1 Lines

Configuring the Serial Interface

These procedures are followed by a sample configuration in the "Configuration Example" section.

Configuring the E3 Controller

If you do not modify the E3 controller configuration of the PA-MC-E3, the configuration defaults in Table 4-4 are used:

Table 4-4 PA-MC-E3 Controller Defaults

Attribute
Default Value

Clock source

line

National reserve bit

1

Idle pattern

0x55


This procedure is optional, however, if you need to change any of the default configuration attributes, follow these steps:


Step 1 Select the E3 controller and enter controller configuration mode:

Router(config)# controller E3 0/0 (Catalyst RSM/VIP2)
Router(config)# controller E3 3/0/0 (Catalyst 6000 family FlexWAN module)
Router(config)# controller E3 1/0 (Cisco 7200 series router)
Router(config)# controller E3 1/0 (Cisco uBR7200 series router)
Router(config)# controller E3 1/0 (Cisco 7201, Cisco 7301)
Router(config)# controller E3 3/0 (Cisco 7304 PCI Port Adapter Carrier Card in a Cisco 
7304 router)
Router(config)# controller E3 1/0/0 (Cisco 7000 and 7500 series routers with VIP)


Note The port number for the PA-MC-E3 is always 0.


Step 2 Change the clock source used by the E3 controller:

Router(config-controller)# clock source {internal | line}

Step 3 Change the national reserve bit.

Router(config-controller)# national bit {0 | 1}

Step 4 Change the idle pattern.

Router(config-controller)# idle pattern hex-number


Configuring E1 Lines

You can configure the E1 lines as any of the following four configuration options:

Channelized

Fractional

Unframed

PRI ISDN

If you assign only one channel group to an E1 line, it is a fractional E1 line. If you assign more than one channel group to an E1 line, it is a channelized E1 line.

For channelized (e1 channel-group command), fractional (e1 channel-group command), and unframed (e1 unframed command) configurations, each configured channel group, which might contain individual timeslots and/or ranges of timeslots, uses only one of the 128 available logical channels. For example, if you assign the range of timeslots 3-7 to a channel group, only one logical channel is used. Likewise, if you assign just timeslot 3 to a channel group, only one logical channel is used.

For PRI ISDN (e1 pri-group command) configurations, each timeslot you assign to a PRI group for a configured E1 line, including each timeslot within a range of timeslots, uses one of the 128 available logical channels. For example, if you assign the range of timeslots 3-7 to a PRI group, five logical channels are used (because you assigned timeslots 3, 4, 5, 6, and 7), whereas if you assign just timeslot 3 to a PRI group, only one logical channel is used.

After you configure the E1 lines, they are recognized by the software as a serial interface, and all configuration commands for a serial interface are available. You can configure the serial interface to carry data traffic with the encapsulation of PPP, HDLC, SMDS, and Frame Relay. For information on configuring a serial interface, see the "Configuring the Serial Interface" section.

Changing the E1 Channel Default Settings

If you do not modify the E1configuration of the PA-MC-E3, the configuration defaults in Table 4-5 are used:

Table 4-5 PA-MC-E3 E1 Channel Defaults

Attribute
Default Value

Clock source

line

National reserve bit pattern

0x1f1

Framing format

crc4


If you need to change any of the default configuration attributes, follow these steps:


Step 1 Select the E3 controller and enter controller configuration mode:

Router(config)# controller E3 0/0 (Catalyst RSM/VIP2)
Router(config)# controller E3 3/0/0 (Catalyst 6000 family FlexWAN module)
Router(config)# controller E3 1/0 (Cisco 7200 series router)
Router(config)# controller E3 1/0 (Cisco uBR7200 series router)
Router(config)# controller E3 1/0 (Cisco 7201, Cisco 7301)
Router(config)# controller E3 3/0 (Cisco 7304 PCI Port Adapter Carrier Card in a Cisco 
7304 router)
Router(config)# controller E3 1/0/0 (Cisco 7000 and 7500 series routers with VIP)


Note The port number for the PA-MC-E3 is always 0; the e1 line is a value from 1 to 16.


Step 2 Change the clock source used by the E3 controller:

Router(config-controller)# e1 line clock source {internal | line}


Caution Hardware version 3.1.0 of the PA-MC-E3 port adapter has a limitation on the use of the internal clock. In this hardware, if you change the E1 clock source from line to internal or from internal to line, it is possible, although rare, that the change will cause the E1 line to transmit an invalid E1 framing pattern causing a loss of frame at the far end. To recover from this condition, manually reset the affected E1 line by using the e1 shutdown controller configuration command followed by the no e1 shutdown controller configuration command. To determine the hardware version on the port adapter, use the show controllers e3 EXEC command. You cannot use the e1 shutdown command while running BERT or loopbacks; you must stop these functions first. In addition, you cannot start a BERT or loopback while an E1 line is shut down.

Step 3 Change the national reserve bit pattern:

Router(config-controller)# e1 line national bit hex-number

Step 4 Change the framing format:

Router(config-controller)# e1 line framing {crc4 | no-crc4 | none}


Configuring Channelized E1 Lines

You can configure any of the 16 E1 lines as channelized E1 lines, but you are limited to a total of 128 logical channels. You can group the time slots in these E1 lines into several individual logical channel groups, each of which carries data with different data link layer protocol encapsulations. You can configure timeslot 16 as a data channel, although it is typically used for common channel signaling. Channel associated signaling (CAS) for voice channels and E1 Facilities Data Link (FDL) on timeslot 16 are not supported.

Each logical channel group can be composed of individual 64-kbps timeslots and/or ranges of timeslots, for example, 1, 9, 12-14. Each logical channel group can contain from 1-31 timeslots maximum; the same timeslot cannot be used in more than one logical channel group. Any unused timeslots are filled with programmable idle-channel data.


Note If you assign only one channel group to an E1 line, it is a fractional E1 line. If you assign more than one channel group to an E1 line, it is a channelized E1 line.


To configure a channelized E1 line, following these steps, beginning in global configuration mode:


Step 1 Select the E3 controller and enter controller configuration mode:

Router(config)# controller E3 0/0 (Catalyst RSM/VIP2)
Router(config)# controller E3 3/0/0 (Catalyst 6000 family FlexWAN module)
Router(config)# controller E3 1/0 (Cisco 7200 series router)
Router(config)# controller E3 1/0 (Cisco uBR7200 series router)
Router(config)# controller E3 1/0 (Cisco 7201, Cisco 7301)
Router(config)# controller E3 3/0 (Cisco 7304 PCI Port Adapter Carrier Card in a Cisco 
7304 router)
Router(config)# controller E3 1/0/0 (Cisco 7000 and 7500 series routers with VIP)

Step 2 Configure the E1 line (values are 1 to 16) in a logical channel group (values are 0 to 30) and specify the timeslots (values are 1 to 31).

Router(config-controller)# e1 line channel-group number timeslots range

Step 3 Repeat Step 2 for each logical channel group and exit when done.

Router(config-controller)# exit


This configuration creates a serial interface. For more information on serial interfaces, see the "Configuring the Serial Interface" section.

Configuring Fractional E1 Lines

You can configure any of the 16 E1 lines as fractional E1 lines, each of which can be either E1 frames or E1 cyclic redundancy check (CRC) multiframes, as specified by CCITT/ITU G.704 and G.706. A fractional E1 line is a subset of the full E1 bandwidth, which uses Nx64 kbps; where N is a timeslot in the range of 1-31.

Fractional E1 lines contain only a single logical channel group that can be either a single 64-kbps timeslot or a range of timeslots; for example timeslot 1, or timeslots 15-23. Any unused timeslots are filled with programmable idle-channel data (idle pattern controller configuration command).


Note If you assign only one channel group to an E1 line, it is a fractional E1 line. If you assign more than one channel group to an E1 line, it is a channelized E1 line.


To configure a fractional E1 line, follow these steps, beginning in global configuration mode:


Step 1 Select the E3 controller and enter controller configuration mode:

Router(config)# controller E3 0/0 (Catalyst RSM/VIP2)
Router(config)# controller E3 3/0/0 (Catalyst 6000 family FlexWAN module)
Router(config)# controller E3 1/0 (Cisco 7200 series router)
Router(config)# controller E3 1/0 (Cisco uBR7200 series router)
Router(config)# controller E3 1/0 (Cisco 7201, Cisco 7301)
Router(config)# controller E3 3/0 (Cisco 7304 PCI Port Adapter Carrier Card in a Cisco 
7304 router)
Router(config)# controller E3 1/0/0 (Cisco 7000 and 7500 series routers with VIP)

Step 2 Configure the E1 line (values are 1 to 16) in a logical channel group (values are 0 to 30) and specify the timeslots (values are 1 to 31).

Router(config-controller)# e1 line channel-group number timeslots range


This configuration creates a serial interface. For more information on serial interfaces, see the "Configuring the Serial Interface" section.

Configuring Unframed E1 Lines

You can configure any of the 16 E1 lines as unframed E1 data lines. Each unframed E1 line contains no framing overhead and is not divided into timeslots.

To configure an unframed E1 line, follow these steps, beginning in global configuration mode:


Step 1 Select the E3 controller and enter controller configuration mode:

Router(config)# controller E3 0/0 (Catalyst RSM/VIP2)
Router(config)# controller E3 3/0/0 (Catalyst 6000 family FlexWAN module)
Router(config)# controller E3 1/0 (Cisco 7200 series router)
Router(config)# controller E3 1/0 (Cisco uBR7200 series router)
Router(config)# controller E3 1/0 (Cisco 7201, Cisco 7301)
Router(config)# controller E3 3/0 (Cisco 7304 PCI Port Adapter Carrier Card in a Cisco 
7304 router)
Router(config)# controller E3 1/0/0 (Cisco 7000 and 7500 series routers with VIP)

Step 2 Configure an unframed E1 line (values are 1 to 16).

Router(config-controller)# e1 line unframed


This configuration creates a serial interface. For more information on serial interfaces, see the "Configuring the Serial Interface" section.

Configuring PRI ISDN E1 Lines

You can configure any of the E1 lines to support the PRI ISDN application. You assign a PRI group to the E1 line. Each PRI group can contain from 1-31 timeslots maximum. It is not necessary to allocate all 30 timeslots for the ISDN application. Timeslot 16 is used for common channel signaling. Any unused timeslot are filled with programmable idle-channel data (idle pattern controller configuration command).

To configure an E1 line to support the PRI ISDN, follow these steps, beginning in global configuration mode:


Step 1 Select the E3 controller and enter controller configuration mode:

Router(config)# controller E3 0/0 (Catalyst RSM/VIP2)
Router(config)# controller E3 3/0/0 (Catalyst 6000 family FlexWAN module)
Router(config)# controller E3 1/0 (Cisco 7200 series router)
Router(config)# controller E3 1/0 (Cisco uBR7200 series router)
Router(config)# controller E3 1/0 (Cisco 7201, Cisco 7301)
Router(config)# controller E3 3/0 (Cisco 7304 PCI Port Adapter Carrier Card in a Cisco 
7304 router)
Router(config)# controller E3 1/0/0 (Cisco 7000 and 7500 series routers with VIP)

Step 2 Configure the E1 line (values are 1 to 16) as a PRI group and specify the timeslots (values are 1 to 31 the default is all timeslots):

Router(config-controller)# e1 line pri-group [timeslots range]


This configuration creates a serial interface. For more information on serial interfaces, see the "Configuring the Serial Interface" section.

Configuring the Serial Interface

After you configure the E1 lines on the PA-MC-E3, you can continue configuring it as you would a normal serial interface. All serial interface commands might not be applicable to the E1 channel. You can configure the serial interface to carry data traffic with the encapsulation of PPP, HDLC, SMDS, and Frame Relay.

For more information on other commands available for serial interfaces, refer to the "Configure a Synchronous Serial Interface" subsection in the "Configuring Interfaces" chapter of the Configuration Fundamentals Configuration Guide.

To enter interface configuration mode and configure the serial interface that corresponds to an E1 line, enter the interfaces serial command in global configuration mode.


Note When configuring the serial interface, you must specify the e1 line number and channel in addition to the standard slot and port information for each router. For unframed E1 lines, the channel is always zero (for example, interface serial 3/0/0/1:0). For channelized and fractional E1 lines, the channel is the number specified as the channel group number (for example, interface serial 3/0/0/3:20, where 20 is the channel group number). For PRI E1 lines, the channel is always 15 (for example, interface serial 3/0/0/3:15).


Table 4-6 provides examples of the interface serial subcommand for an E1 line for the supported platforms.

Table 4-6 Examples of the interface serial Subcommand for an E1 Line for Supported Platforms 

Platform
Command
Example

Catalyst RSM/VIP2 in Catalyst 5000 family switches

interface serial, followed by slot/port/e1-line:channel (port-adapter-slot-number/
interface-port-number/e1-line-
number:channel-group-number)

The example is for interface 0 of a port adapter in port adapter slot 0.

Router(config)# interface serial 
0/0/1:0
Router(config-if)#

Catalyst 6000 family FlexWAN module in Catalyst 6000 family switches

interface serial, followed by mod-num/bay/port/e1-line:
channel
(module-slot-number/
port-adapter-bay-number/
interface-port-number/e1-line-
number:channel-group-number)

The example is for interface 0 of a port adapter in port adapter bay 0 of a FlexWAN module installed in slot 3.

Router(config)# interface serial 
3/0/0/1:0
Router(config-if)#

Cisco 7200 series routers and Cisco 7200 VXR routers

interface serial, followed by slot/port/e1-line:channel (port-adapter-slot-number/
interface-port-number/e1-line-
number:channel-group-number)

The example is for interface 0 of a port adapter in port adapter slot 6.

Router(config)# interface serial 
6/0/1:0
Router(config-if)#

Cisco 7201 router

interface serial, followed by slot/port/e1-line:channel (port-adapter-slot-number/
interface-port-number/e1-line-
number:channel-group-number)

The example is for interface 0 of a
port adapter in port adapter slot 1.

Router(config)# interface serial 
1/0/1:0
Router(config-if)#

Cisco uBR7223 router

interface serial, followed by slot/port/e1-line:channel (port-adapter-slot-number/
interface-port-number/e1-line-
number:channel-group-number)

The example is for interface 0 of a
port adapter in port adapter slot 1.

Router(config)# interface serial 
1/0/1:0
Router(config-if)#

Cisco uBR7246 router

interface serial, followed by slot/port/e1-line:channel (port-adapter-slot-number/
interface-port-number/e1-line-
number:channel-group-number)

The example is for interface 0 of a
port adapter in port adapter slot 2.

Router(config)# interface serial 
2/0/1:0
Router(config-if)#

Cisco 7301 router

interface serial, followed by slot/port/e1-line:channel (port-adapter-slot-number/
interface-port-number/e1-line-
number:channel-group-number)

The example is for interface 0 of a
port adapter in port adapter slot 1.

Router(config)# interface serial 
1/0/1:0
Router(config-if)#

Cisco 7304 PCI Port Adapter Carrier Card in a Cisco 7304 router

interface serial, followed by slot/port/e1-line:channel (module-slot-number/
interface-port-number/e1-line-
number:channel-group-number)

The example is for interface 0 on a port adapter in a Cisco 7304 PCI Port Adapter Carrier Card in module slot 3 of a Cisco 7304 router.

Router(config-if)# interface serial 
3/0/1:0 
Router(config-if)# 

VIP in Cisco 7000 series routers or Cisco 7500 series routers

interface serial, followed by slot/port adapter/port/e1-line:channel (interface-processor-slot-number/
port-adapter-slot-number/
interface-port-number/e1-line-
number:channel-group-number)

The example is for interface 0 of a
port adapter in port adapter slot 1 of a VIP in interface processor slot 1.

Router(config)# interface serial 
1/1/0/1:0
Router(config-if)#

Configuration Example

The following example shows a condensed PA-MC-E3 configuration example in which multiple E1 lines at remote sites are aggregated onto a single E3 line at the edge router. This example concentrates the E1 lines to the router without an E123 multiplexer or E1 CSU/DSU.

In the following example, the PA-MC-E3 in slot 4 is configured as follows:

E1 line 2 is assigned to channel group 0 and is using all timeslots (full E1 bandwidth)

E1 line 3 is assigned to channel group 0 and is using timeslots 1 through 15

E1 line 3 is also assigned to channel group 1 and is using timeslots 16 through 31

For the E3, the default clock source, national, bit, and idle pattern are used

For each E1 line, the default framing, national bits, and clock source are used

Each E1 channel is assigned an IP address

Note that the example below is only a partial example; other interface configuration commands can be assigned to the E1 channel.

For more information, refer to the "Configuring the E3 Controller" section and the "Configuring E1 Lines" section.

Router# configure terminal

Enter configuration commands, one per line. End with CNTL/Z. 
Router(config)# controller e3 4/0/0

Router(config-controller)# e1 2 channel-group 0 timeslot 1-31

Router(config-controller)# e1 3 channel-group 0 timeslot 1-15

Router(config-controller)# e1 3 channel-group 1 timeslot 16-31

...
Router(config)# interface serial 4/0/0/2:0

Router(config-if)# ip address 10.20.30.1 255.255.255.0

Router(config)# interface serial 4/0/0/3:0

Router(config-if)# ip address 10.20.40.1 255.255.255.0

Router(config)# interface serial 4/0/0/3:1

Router(config-if)# ip address 10.20.50.1 255.255.255.0

...
Router(config-if)# end

Configuring a BERT on an E1 Line

Bit error rate test (BERT) circuitry is built into the PA-MC-E3. Using BERTs you can test cables and signal problems in the field. You can configure any E1 line to connect to the onboard BERT circuitry.

There are two categories of test patterns that can be generated by the onboard BERT circuitry: pseudorandom and repetitive. The former test patterns are exponential numbers and conform to CCITT/ITU O.151 and O.153; the latter test patterns are zeroes or ones, or alternating zeroes and ones.

A description of each type of test pattern follows:

Pseudorandom patterns:

2^11 (per CCITT/ITU O.151)

2^15 (per CCITT/ITU O.151)

2^20 (per CCITT/ITU O.153)

2^20 QRSS (per CCITT/ITU O.151)

2^23 (per CCITT/ITU O.151)

Repetitive patterns:

All zeros (0s)

All ones (1s)

Alternating zeros (0s) and ones (1s)

Both the total number of error bits received and the total number of bits received are available for analysis. You can select the testing period from 1 minute to 24 hours, and you can also retrieve the error statistics anytime during the BERT. (Note that BER testing for the E3 link is not supported.) When running a BERT, your system expects to receive the same pattern that it is transmitting. To help ensure this, two common options are available:

Use a loopback somewhere in the link or network.

Configure remote testing equipment to transmit the same BER test pattern at the same time.

Sending a BERT Pattern on an E1 Line

You can send a BERT pattern on an E1 line with the following controller command:

e1 e1-line-number bert pattern pattern interval time.

where:

e1-line-number is 1-16

time is 1-1440 minutes

pattern is:

0s, repetitive test pattern of all zeros (as 00000...)

1s, repetitive test pattern or all ones (as 11111...)

2^11, pseudo-random test pattern (2,048 bits long)

2^15, pseudo-random O.151 test pattern (32,768 bits long)

2^20-O153, pseudo-random O.153 test pattern (1,048,575 bits long)

2^20-QRSS, pseudo-random QRSS O.151 test pattern (1,048,575 bits long)

2^23, pseudo-random O.151 test pattern (8,388,607 bits long)

alt-0-1, repetitive alternating test pattern of zeros (0s) and ones (1s), as 01010101...


Note To terminate a BER test during the specified test period, use the no e1 line bert command.


The following examples show how to configure a BER test to send a BERT pseudorandom pattern of 2^20 through E1 line 10 for 5 minutes for various supported routers:

For a Cisco 7200 series or a Cisco uBR7200 series router:

Router(config)# controller e3 1/0
Router(config-controller)# e1 10 bert pattern 2^20 interval 5

For a VIP2:

Router(config)# controller e3 1/0/0
Router(config-controller)# e1 10 bert pattern 2^20 interval 5

For a Catalyst RSM/VIP2:

Router(config)# controller e3 1/0
Router(config-controller)# e1 10 bert pattern 2^20 interval 5

Viewing BERT Results

To view the BERT results for the above examples, you would enter the following show controllers commands:

For the Cisco 7200 series or a Cisco uBR7200 series router:

Router(config)# show controllers e3 1/0/10

For a VIP2:

Router(config)# show controllers e3 1/0/0/10

For a Catalyst RSM/VIP2:

Router(config)# show controllers e3 1/0/10

Configuring Cyclic Redundancy Checks

Cyclic redundancy check (CRC) is an error-checking technique that uses a calculated numeric value to detect errors in transmitted data. All interfaces use a 16-bit CRC (CRC-CITT) by default but also support a 32-bit CRC. The sender of a data frame calculates the frame check sequence (FCS). Before it sends a frame, the sender appends the FCS value to the message. The receiver recalculates the FCS and compares its calculation to the FCS from the sender. If there is a difference between the two calculations, the receiver assumes that a transmission error occurred and sends a request to the sender to resend the frame.

Table 4-7 summarizes the CRC commands.

Table 4-7 CRC Commands

Command
Function
Example

crc size

Enable 32-bit CRC.

The following example enables 32-bit CRD on a serial interface:

Router(config)# interface serial 3/0
Router(config-if)# crc 32

no crc size

Return to default 16-bit CRC.

The following example disables 32-bit CRD on a serial interface and returns to the default 16-bit CRC:

Router(config)# interface serial 3/0
Router(config-if)# no crc 32

You enable 32-bit CRC using the crc 32 command. Before you can enable 32-bit CRC, you must use the interface serial command (followed by the interface address of the interface) to select the interface on which you want to enable 32-bit CRC. This command functions in the same way on all supported platforms.

In the example that follows, 32-bit CRC is specified:

Router(config-if)# crc 32

The preceding command example applies to all systems in which the PA-MC-E3 is supported. Use the no crc 32 command to disable CRC-32 and return the interface to the default CRC-16 (CRC-CITT) setting.

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 prompt. Then write the new configuration to NVRAM using the copy running-config startup-config command.

For command descriptions, refer to the Configuration Fundamentals Configuration Guide on Cisco.com.

Checking the Configuration

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:

Using show Commands to Verify the New Interface Status

Using the ping Command to Verify Network Connectivity

Using loopback Commands

Using show Commands to Verify the New Interface Status

Table 4-8 demonstrates how you can use the show commands to verify that new interfaces are configured and operating correctly and that the PA-MC-E3 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 on page viii.


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.


Table 4-8 Using show Commands 

Command
Function
Example

show version or
show hardware

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 controllers e3 [slot/port/e1-line] [brief | tabular]

Displays the status of the E3 controller on the Catalyst RSM/VIP2, Cisco7200 series routers, Cisco 7200 uBR series routers, Cisco 7200 VXR routers, Cisco 7201 router, Cisco 7301 router, and Cisco 7304 PCI Port Adapter Carrier Card in a Cisco 7304 router

Router# show controllers e3 1/0/1 
brief 

show controllers e3 [module-slot-
number/port-adapter-bay-number/
interface-port-number
/e1-line] [brief | tabular]

Displays the status of the E3 controller on a Catalyst 6000 family FlexWAN module

Router# show controllers e3 3/0/0/1 
brief

show controllers e3 [interface-processor-
slot
-number/port-adapter-slot-number/
interface-port-number/e1-line] [brief | tabular]

Displays the status of the E3 controller on a VIP in a Cisco 7000 series router or Cisco 7500 series router

Router# show controllers e3 3/1/0/1 
tabular

show diag slot

Note The slot argument is not required with Catalyst 5000 family switches.

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 type 0 or 1/
interface-port-number

Displays status information about a specific type of interface (for example, serial) on a Catalyst RSM/VIP2

Router# show interfaces serial 1/0

show interfaces type module-slot-
number/port-adapter-bay-number/
interface-port-number

Displays status information about a specific type of interface (for example, serial) on a Catalyst 6000 family FlexWAN module

Router# show interfaces serial 3/0/0

show interfaces type port-adapter-slot-number/
interface-port-number

Displays status information about a specific type of interface (for example, serial) in a Cisco 7200 series router, Cisco 7200 VXR router, Cisco 7201 router, or Cisco 7301 router

Router# show interfaces serial 1/0

show interfaces type 1/interface-port-number

Displays status information about a specific type of interface (for example, serial) in a
Cisco uBR7223 router

Router# show interfaces serial 1/1

show interfaces type 1 or 2/
interface-port-number

Displays status information about a specific type of interface (for example, serial) in a Cisco uBR7246 router

Router# show interfaces serial 2/0

show interfaces type module-slot-number/
interface-port-number

Displays status information about a specific type of interface (for example, serial) on a Cisco 7304 PCI Port Adapter Carrier Card in a Cisco 7304 router

Router# show interfaces serial 3/0

show interfaces type interface-processor-
slot
-number/port-adapter-slot-number/
interface-port-number

Displays status information about a specific type of interface (for example, serial) on a VIP in a Cisco 7000 series router or Cisco 7500 series router

Router# show interfaces serial 3/1/0

show interfaces serial slot/port/e1-line:channel-group

Display statistics about the serial information for a specific E1 line (values are 1 to 16) and channel group (values are 0 to 30) on the Catalyst RSM/VIP2, Cisco7200 series routers, Cisco 7200 uBR series routers, Cisco 7200 VXR routers, Cisco 7201 router, Cisco 7301 router, and Cisco 7304 PCI Port Adapter Carrier Card in a Cisco 7304 router

Router# show interfaces serial 1/0/1:0

show interfaces serial module-slot-
number/port-adapter-bay-number/
interface-port-number
/e1-line:channel-
group

Display statistics about the serial information for a specific E1 line (values are 1 to 16) and channel group (values are 0 to 30) on a Catalyst 6000 family FlexWAN module

Router# show interfaces serial 
3/0/1:0

show interfaces serial interface-processor-
slot
-number/port-adapter-slot-number
/e1-line:channel-group

Display statistics about the serial information for a specific E1 line (values are 1 to 16) and channel group (values are 0 to 30) on a VIP in a Cisco 7000 series router or Cisco 7500 series router

Router# show interfaces serial 
3/0/1:0

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

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 and offers some platform-specific output examples:

Using the show version or show hardware Commands

Using the show diag Command

Using the show interfaces Command

Choose the subsection appropriate for your system. Proceed to "Using the ping Command to Verify Network Connectivity" section when you have finished using the show commands.

Using the show version or show hardware 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.


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.


The following sections provide platform-specific output examples using the show version command:

Catalyst RSM/VIP2 in Catalyst 5000 Family Switches—Example Output of the show version Command

Catalyst 6000 Family FlexWAN Module—Example Output of the show version Command

Cisco 7200 Series Routers, Cisco 7200 VXR Routers, and Cisco uBR7200 Series Routers—Example Output of the show version Command

Cisco 7201 Router—Example Output of the show version Command

VIP in Cisco 7000 Series Routers and Cisco 7500 Series Routers—Example Output of the show version Command

Catalyst RSM/VIP2 in Catalyst 5000 Family Switches—Example Output of the show version Command

Following is an example of the show version command from a Catalyst 5000 family switch with the PA-MC-E3:

Router# show version

Cisco Internetwork Operating System Software
IOS (tm) C5RSM Software (C5RSM-JSV-M), Version 11.2(9)P
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.
1 C5IP controller (15 Vlan).
2 MIP controllers (4 E1).
1 VIP2 controller (2 E1)(4 Token Ring).
6 Channelized E1/PRI ports.
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

Catalyst 6000 Family FlexWAN Module—Example Output of the show version Command

Following is an example of the show version command from a Catalyst 6000 family switch with the PA-MC-E3:

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

Cisco 7200 Series Routers, Cisco 7200 VXR Routers, and Cisco uBR7200 Series Routers—Example Output of the show version Command

Following is an example of the show version command from a Cisco 7200 series router with the PA-MC-E3:

Router# show version

Cisco Internetwork Operating System Software
IOS (tm) 7200 Software (C7200-J-M), Version 11.1(7)CA [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.
4 Ethernet/IEEE 802.3 interfaces.
2 FastEthernet/IEEE 802.3 interfaces.
4 Token Ring /IEEE802.5 interfaces.
12 Serial network interfaces.
1 Compression port adapter.
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

Cisco 7201 Router—Example Output of the show version Command

Following is an example of the show version command from a Cisco 7201 router:

Router# show version 

Cisco IOS Software, 7200 Software (C7200P-ADVENTERPRISEK9-M), Version 
12.4(biffDEV.061001), INTERIM SOFTWARE Copyright (c) 1986-2006 by Cisco Systems, Inc.
Compiled Sun 01-Oct-06 23:42 by biff
ROM: System Bootstrap, Version 12.4(4r)XD5, RELEASE SOFTWARE (fc1)
BOOTLDR: Cisco IOS Software, 7200 Software (C7200P-KBOOT-M), Version 12.4(TAZ3DEV.060927), 
INTERIM SOFTWARE
c7201alpha1 uptime is 5 days, 18 hours, 32 minutes System returned to ROM by power-on 
System image file is "disk0:c7200p-adventerprisek9-mz.2006-10-01.biffdev"
This product contains cryptographic features and is subject to United States and local 
country laws governing import, export, transfer and use. Delivery of Cisco cryptographic 
products does not imply third-party authority to import, export, distribute or use 
encryption.
Importers, exporters, distributors and users are responsible for compliance with U.S. and 
local country laws. By using this product you agree to comply with applicable laws and 
regulations. If you are unable to comply with U.S. and local laws, return this product 
immediately.
A summary of U.S. laws governing Cisco cryptographic products may be found at:
http://www.cisco.com/wwl/export/crypto/tool/stqrg.html
If you require further assistance please contact us by sending email to export@cisco.com.
Cisco 7201 (c7201) processor (revision A) with 917504K/65536K bytes of memory.
Processor board ID 2222222222222
MPC7448 CPU at 1666Mhz, Implementation 0, Rev 2.2
1 slot midplane, Version 2.255
Last reset from power-on
1 FastEthernet interface
4 Gigabit Ethernet interfaces
2045K bytes of NVRAM.
62443K bytes of USB Flash usbflash0 (Read/Write)
250880K bytes of ATA PCMCIA card at slot 0 (Sector size 512 bytes).
65536K bytes of Flash internal SIMM (Sector size 512K).
Configuration register is 0x2

VIP in Cisco 7000 Series Routers and Cisco 7500 Series Routers—Example Output of the show version Command

Following is an example of the show version command from a Cisco 7500 series router with the PA-MC-E3:

Router# show version

Cisco Internetwork Operating System Software
IOS (tm) GS Software (RSP-A), Version 11.1(7)CA [biff 125]
Copyright (c) 1986-1996 by cisco Systems, Inc.
Compiled Sat 10-Aug-96 17:56 by biff
Image text-base: 0x600108A0, data-base: 0x60952000

ROM: System Bootstrap, Version 5.3(16645) [biff 571], RELEASE SOFTWARE
ROM: GS Software (RSP-BOOT-M), Version 11.1(7)CA, 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.
1 EIP controller (6 Ethernet).
1 VIP2 controller (8 Ethernet)(1 HSSI).
14 Ethernet/IEEE 802.3 interfaces.
1 HSSI network interface.
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

Using the show diag Command

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 Catalyst 5000 family switch, Cisco 7200 series router, Cisco 7200 VXR router, Cisco uBR7200 series router, Cisco 7201 router, Cisco 7301 router, or Cisco 7401ASR router, the module slot in a Cisco 7304 PCI Port Adapter Carrier Card in a Cisco 7304 router, and the interface processor slot in a Cisco 7000 series router or Cisco 7500 series router with a VIP. In the FlexWAN module, the show diag command is used without the slot designation.


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.



Note The slot argument is not required for Catalyst 5000 family switches.


The following sections provide platform-specific output examples using the show diag command:

Catalyst RSM/VIP2 in Catalyst 5000 Family Switches—Example Output of the show diag Command

Cisco 6000 Family FlexWAN Module—Example Output of the show diag Command

Cisco 7200 Series Routers, Cisco 7200 VXR Routers, and Cisco uBR7200 Series Routers—Example Output of the show diag Command

Cisco 7201 Router —Example Output of the show diag Command

VIP in Cisco 7000 Series Routers and Cisco 7500 Series Routers—Example Output of the show diag Command

Catalyst RSM/VIP2 in Catalyst 5000 Family Switches—Example Output of the show diag Command

Following is an example of the show diag command that shows a PA-MC-E3 on a Catalyst RSM/VIP2:

Router# show diag
Slot 0:
        Physical slot 0, ~physical slot 0xF, logical slot 0, CBus 1
        Microcode Status 0x4
        Master Enable, LED, WCS Loaded
        Board is analyzed
        Pending I/O Status: Console I/O, Debug I/O
        EEPROM format version 1
        C5IP controller, HW rev 1.0, board revision A0
        Serial number: 00000001  Part number: 00-0000-01
        Test history: 0x00        RMA number: 00-00-00
        Flags: cisco 7000 board; 7500 compatible
EEPROM contents (hex):
          0x20: 01 1C 01 00 00 00 00 01 00 00 00 01 00 00 00 00
          0x30: 50 00 00 00 00 00 00 00 00 00 00 78 00 00 00 00
[Additional display text omitted]

Cisco 6000 Family FlexWAN Module—Example Output of the show diag Command

Following is an example of the show diag command that shows a PA-MC-E3 on a Catalyst 6000 family FlexWAN module:

Router# show diag

(Additional displayed text omitted from this example.)

Slot 5: Logical_index 11
     Board is analyzed ipc ready FlexWAN controller

     Slot database information:
     Flags: 0x2004	Insertion time: unknown

     CWAN Controller Memory Size: Unknown
     PA Bay 1 Information:
          CE3 PA, 1 port
     EEPROM format version 0
     HW rev 0.00, Board revision UNKNOWN
     Serial number: 00000000  Part number: 00-0000-00 

Cisco 7200 Series Routers, Cisco 7200 VXR Routers, and Cisco uBR7200 Series Routers—Example Output of the show diag Command

Following is an example of the show diag command that shows a PA-MC-E3 in port adapter slot 1 of a Cisco 7200 series router:

Router# show diag 1
Slot 1:
CE3 Port adapter, 1 port
Port adapter is analyzed
Port adapter insertion time 00:18:56 ago
EEPROM contents at hardware discovery:
Hardware revision 1.0           Board revision A0
Serial number     9007030       Part number    73-2410-02
Test history      0x0           RMA number     00-00-00
EEPROM format version 1
EEPROM contents (hex):
0x20:01 61 01 00 00 89 6F B6 49 09 6A 02 00 00 00 00
0x30:50 00 00 00 98 05 26 00 FF FF FF FF FF FF FF FF

Cisco 7201 Router —Example Output of the show diag Command

Following is an example of the show diag command on a Cisco 7201 router:

Router# show diag 1
Slot 1:
Dual OC3 POS Port adapter, 2 ports
Port adapter is analyzed 
Port adapter insertion time 00:02:19 ago
EEPROM contents at hardware discovery:
Hardware Revision : 1.0
PCB Serial Number : JAE07520DYL
Part Number : 73-8220-02
Board Revision : A0
RMA Test History : 00
RMA Number : 0-0-0-0
RMA History : 00
Deviation Number : 0
Product (FRU) Number : PA-POS-2OC3
Top Assy. Part Number : 800-21857-02
EEPROM format version 4
EEPROM contents (hex):
0x00: 04 FF 40 03 E3 41 01 00 C1 8B 4A 41 45 30 37 35
0x10: 32 30 44 59 4C 82 49 20 1C 02 42 41 30 03 00 81
0x20: 00 00 00 00 04 00 88 00 00 00 00 CB 94 50 41 2D
0x30: 50 4F 53 2D 32 4F 43 33 20 20 20 20 20 20 20 20
0x40: 20 C0 46 03 20 00 55 61 02 FF FF FF FF FF FF FF
0x50: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0x60: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
0x70: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

VIP in Cisco 7000 Series Routers and Cisco 7500 Series Routers—Example Output of the show diag Command

Following is an example of the show diag command that shows a PA-MC-E3 in port adapter
slot 0 on a VIP2 in interface processor slot 1:

Router# show diag 1
Slot 1:
Mueslix serial (RS232) port adapter, 8 ports
Port adapter is analyzed
Port adapter insertion time 2d09h ago
Hardware revision 1.4           Board revision UNKNOWN
Serial number     4294967295    Part number    255-65535-255
Test history      0xFF          RMA number     255-255-255
EEPROM format version 1
EEPROM contents (hex):
0x20:01 0F 01 04 FF FF FF FF FF FF FF FF FF FF FF FF
0x30:FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
        Slot database information:
        Flags: 0x4      Insertion time: 0x12A0 (08:56:58 ago)
 
        Controller Memory Size: 8 MBytes
 
        PA Bay 0 Information:
                Mueslix Serial PA, 8 ports
                EEPROM format version 1
                HW rev 1.0, Board revision A0
                Serial number: 4294967295  Part number: 255-65535-255 
 
        PA Bay 1 Information:
                Fast-Serial PA, 4 ports
                EEPROM format version 1
                HW rev 1.0, Board revision A0
                Serial number: 02024473  Part number: 73-1389-05

Using the show interfaces Command

Display status information (including the physical slot and interface address) for the interfaces you specify using the show interfaces command.

For complete descriptions of interface subcommands and the configuration options available for the individual platforms and VIP interfaces, refer to the publications listed in the "Related Documentation" section on page viii.


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.


The following sections provide platform-specific output examples using the show interfaces command:

Catalyst RSM/VIP2 in Catalyst 5000 Family Switches—Example Output of the show interfaces Command

Catalyst 6000 Family FlexWAN Module—Example Output of the show interfaces Command

Cisco 7200 Series Routers, Cisco 7200 VXR Routers, and Cisco uBR7200 Series Routers—Example Output of the show interfaces Command

Cisco 7201 Router—Example Output of the show interfaces Command

VIP in Cisco 7000 Series Routers or Cisco 7500 Series Routers—Example Output of the show interfaces Command

Catalyst RSM/VIP2 in Catalyst 5000 Family Switches—Example Output of the show interfaces Command

Following are examples of the show interfaces serial command from a Catalyst RSM/VIP2.I n these examples, the eight serial interfaces (0 to 7) are on a port adapter in port adapter slot 1 of a Catalyst RSM/VIP2; also, most of the status information for each interface is omitted. (Interfaces are administratively shut down until you enable them.)

Router# show interfaces serial 1/0
Serial1/0 is up, line protocol is up
	Hardware is cyBus Serial
  Internet address is 10.0.0.1
   MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255
  Encapsulation HDLC, loopback not set, keepalive not set
[Additional display text omitted from this example]

Router# show interfaces serial 1/1
Serial1/1 is up, line protocol is up
	Hardware is cyBus Serial
  Internet address is 10.0.0.1
  MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255
  Encapsulation HDLC, loopback not set, keepalive not set
[Additional display text omitted from this example]
 

Router# show interfaces serial 1/2
Serial1/2 is up, line protocol is up
	Hardware is cyBus Serial
  Internet address is 10.0.0.2
  MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255
  Encapsulation HDLC, loopback not set, keepalive not set
[Additional display text for remaining interfaces omitted] 

Catalyst 6000 Family FlexWAN Module—Example Output of the show interfaces Command

Following is an example of the show interfaces serial command from a Catalyst 6000 family FlexWAN module. In this example, the Catalyst 6000 family FlexWAN module is in slot 5, and the MC-E3 port adapter is in port adapter bay 1:

Router(config)# show interface serial 5/1/0/1:0
Serial5/1/0/1:0 is down, line protocol is down 
  Hardware is E3
  MTU 1500 bytes, BW 1984 Kbit, DLY 20000 usec, 
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation HDLC, crc 16, loopback not set
  Keepalive not set
  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, 2 interface resets
     0 output buffer failures, 0 output buffers swapped out
     0 carrier transitions alarm present
  Timeslot(s) Used:1-31, Transmitter delay is 0 flags, transmit queue length 999

Cisco 7200 Series Routers, Cisco 7200 VXR Routers, and Cisco uBR7200 Series Routers—Example Output of the show interfaces Command

Following are examples of the show interfaces serial command from a Cisco 7200 series router. In these examples, the eight serial interfaces (0 to 7) are on a port adapter in port adapter slot 1; also, most of the status information for each interface is omitted. (Interfaces are administratively shut down until you enable them.)

Router# show interfaces serial 1/0
Serial1/0 is up, line protocol is up
	Hardware is M8T-RS232
	Internet address is 10.0.0.0
	MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255
	Encapsulation HDLC, loopback not set, keepalive set (10 sec)
[Additional display text omitted from this example]

Router# show interfaces serial 1/1
Serial1/1 is up, line protocol is up
	Hardware is M8T-RS232
	Internet address is 10.0.0.1
	MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255
	Encapsulation HDLC, loopback not set, keepalive set (10 sec)
[Additional display text omitted from this example]

Router# show interfaces serial 1/2
Serial1/2 is up, line protocol is up
	Hardware is M8T-RS232
	Internet address is 10.0.0.2
	MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255
	Encapsulation HDLC, loopback not set, keepalive set (10 sec)
[Additional display text for remaining interfaces omitted]

Following is an example of the show interfaces serial command, which shows all of the information specific to interface port 0 on a PA-MC-E3 installed in port adapter slot 1:

Router# show interfaces serial 1/0
Serial1/0 is up, line protocol is up
  Hardware is M8T-RS232
  MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255
  Encapsulation HDLC, loopback not set, keepalive set (10 sec)
  Last input never, output 1d17h, output hang never
  Last clearing of "show interface" counters never
  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 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
     24 packets output, 5137 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 output buffer failures, 0 output buffers swapped out
     0 carrier transitions     DCD=down  DSR=down  DTR=down  RTS=down  CTS=down

Cisco 7201 Router—Example Output of the show interfaces Command

Following is an example of the show interfaces command from a Cisco 7201 router:

Router# show interfaces
GigabitEthernet0/0 is up, line protocol is up
  Hardware is MV64460 Internal MAC, address is 0019.56c5.2adb (bia
0019.56c5.2adb)
  Internet address is 209.165.200.225 
  MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec, 
     reliability 255/255, txload 1/255, rxload 45/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 1000Mb/s, media type is RJ45
  output flow-control is XON, input flow-control is XON
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:07:03, output 00:00:07, output hang never
  Last clearing of "show interface" counters 00:00:04
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 180240000 bits/sec, 430965 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     2222975 packets input, 133378500 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 watchdog, 0 multicast, 0 pause input
     0 input packets with dribble condition detected
     0 packets output, 0 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 pause output
     0 output buffer failures, 0 output buffers swapped out 

VIP in Cisco 7000 Series Routers or Cisco 7500 Series Routers—Example Output of the show interfaces Command

Following are examples of the show interfaces serial command used with the VIP. In these examples, the eight serial interfaces (0 to 7) are on a port adapter in port adapter slot 1 of a VIP in interface processor slot 3; also, most of the status information for each interface is omitted. (Interfaces are administratively shut down until you enable them.)

Router# show interfaces serial 3/1/0
Serial3/1/0 is up, line protocol is up
	Hardware is cyBus Serial
  Internet address is 10.0.0.0
  MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255
  Encapsulation HDLC, loopback not set, keepalive not set
[Additional display text omitted from this example]

Router# show interfaces serial 3/1/1
Serial3/1/1 is up, line protocol is up
	Hardware is cyBus Serial
  Internet address is 10.0.0.1
  MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255
  Encapsulation HDLC, loopback not set, keepalive not set
[Additional display text omitted from this example]

Router# show interfaces serial 3/1/2
Serial3/1/2 is up, line protocol is up
	Hardware is cyBus Serial
  Internet address is 10.0.0.2
  MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255
  Encapsulation HDLC, loopback not set, keepalive not set
[Additional display text for remaining interfaces omitted]

Following is an example of the show interfaces serial command, which shows all of the information specific to interface 0 on a port adapter in port adapter slot 1 of a VIP in interface processor slot 3:

Router# show interfaces serial 3/1/0
Serial3/1/0 is up, line protocol is up 
  Hardware is cyBus Serial
  Internet address is 10.0.0.0
  MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255
  Encapsulation HDLC, loopback not set, keepalive not set
  Last input 2d18h, output 00:00:54, 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: 0/64/0 (size/threshold/drops) 
     Conversations  0/1 (active/max active)
     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
     16 packets input, 1620 bytes, 0 no buffer
     Received 0 broadcasts, 0 runts, 0 giants
     0 input errors, 0 CRC, 0 frame, 0 overrun, 1 ignored, 0 abort
     3995 packets output, 1147800 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 output buffer failures, 0 output buffers swapped out
     1 carrier transitions
     RTS up, CTS up, DTR up, DCD up, DSR up

Proceed to the next section, "Using the ping Command to Verify Network Connectivity," to check network connectivity of the PA-MC-E3 and switch or router.

Using the ping Command to Verify Network Connectivity

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 on page viii 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.

Proceed to the next section, "Using loopback Commands," to finish checking network connectivity.

Using loopback Commands

Use the loopback {dte | local | network {line | payload} command to troubleshoot the E3 serial port adapter at the physical interface level. The command loops all packets from the E3 interface either back to the interface or from the network back out toward the network.

Use the no form of the command to remove the loop.

The following examples of the loopback {dte | local | network {line | payload} command that configure loopback modes on the single interface (interface 0) of a one-port E3 serial port adapter in port adapter slot 0 of a VIP2 in chassis slot 10 of a Cisco 7500 series router:

The loopback dte command places an interface into loopback data terminal equipment (DTE) mode, which loops the router output data back toward the router (after the line interface unit).

Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
router(config)# interface serial 10/0/0
router(config-if)# loopback dte

The loopback local command places an interface into local loopback mode, which loops the router output data back toward the router at the framer.

Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
router(config)# interface serial 10/0/0
router(config-if)# loopback local	

The loopback network line command places an interface into network line loopback mode, which loops the data back toward the network (before the framer).

Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
router(config)# interface serial 10/0/0
router(config-if)# loopback network line

The lookback network payload command places the interface into network payload loopback mode, which loops just the payload data back toward the network at the E3 framer.

Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
router(config)# interface serial 10/0/0
router(config-if)# loopback network payload

In addition to using loopback commands at the physical interface level, you can also use the loopback local command to diagnose problems with cables between the E3 controller and the central switching office at the E3 link level, or to diagnose problems with cables between the port adapter and the central switching office at the E1 line level.

An E3 local loopback simultaneously loops all channels toward the router and loops the E3 link back toward the network.

An E1 local loopback sets both local and line (remote) loopback modes simultaneously and loops data toward the router. An E1 remote line loopback loops the E1 line to the remote end. You can also use this loopback mode with bit error rate (BER) tests.

To set a loopback on the E3 or E1 lines, follow these steps, beginning in global configuration mode:


Step 1 Select the E3 controller and enter controller configuration mode:

Router(config)# controller E3 0/0 (Catalyst RSM/VIP2)
Router(config)# controller E3 3/0/0 (Catalyst 6000 family FlexWAN module)
Router(config)# controller E3 1/0 (Cisco 7200 series router)
Router(config)# controller E3 1/0 (Cisco uBR7200 series router)
Router(config)# controller E3 1/0 (Cisco 7201, Cisco 7301)
Router(config)# controller E3 3/0 (Cisco 7304 PCI Port Adapter Carrier Card in a Cisco 
7304 router)
Router(config)# controller E3 1/0/0 (Cisco 7000 and 7500 series routers with VIP)

Step 2 Set a local loopback on the E3 controller:

Router(config-controller)# loopback local

Step 3 Set a local loopback on the E1 line:

Router(config-controller)# e1 line loopback local