Cisco 10000 Series Router Line Card Configuration Guide
24-Port Channelized E1/T1 Line Card Configuration
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Table Of Contents

24-Port Channelized E1/T1 Line Card Configuration

Software Support

Checking Hardware and Software Compatibility

Commands and Default Values

E1 Commands

E1 Interface Numbering Syntax

T1 Commands

T1 Interface Numbering Syntax

Configuration Task Overview

E1 Configuration Examples

Configuring an E1 Controller

Configuring Full-Rate Unchannelized E1 Bandwidths

Configuring Full-Rate Channelized E1 Bandwidths

Configuring Fractional Channelized E1 Bandwidths

Configuring E1 Serial Interfaces

T1 Configuration Examples

Configuring a T1 Controller

Configuring Full-Rate Channelized T1 Bandwidths

Configuring Fractional Channelized T1 Bandwidths

Configuring T1 Serial Interfaces

Command Descriptions

Privileged EXEC Commands

Simulating Line Card Installation and Removal

Displaying Controller Information

Displaying Interface Information

Global Configuration Commands

Preconfiguring a Line Card

Shutting Down Line Card Simulation

Configuring a Controller

Configuring a Serial Interface

Controller Configuration Commands

E1 Port Interface Density

T1 Port Interface Density

Controller Commands

Running a BER Test

Specifying T1 Short-Haul Cable Length

Specifying Channel Groups

Specifying a Clock Source

Adding a Controller Description

Enabling T1 Facility Data Link Performance Monitoring

Specifying Framing

Specifying Linecoding

Specifying Loopbacks

Specifying E1 National Reserve Bits

Specifying a T1 Yellow Alarm

Specifying Shutdown


24-Port Channelized E1/T1 Line Card Configuration

This chapter describes the procedures for configuring the Cisco 10000 series 24-Port Channelized E1/T1 line card, hereafter known as the 24-Port Channelized E1/T1 line card.

The 24-Port Channelized E1/T1 line card provides Cisco 10000 routers with 24 copper channelized or unchannelized interface ports that you can configure as E1 or T1 interfaces.

This chapter contains the following sections:

•Software Support

•Commands and Default Values

•Configuration Task Overview

•Command Descriptions

•Controller Configuration Commands

Software Support

Table 5-1 shows the minimum Cisco IOS release on each release train that supports the 24-Port Channelized E1/T1 line card.

Table 5-1 24-Port Channelized E1/T1 Line Card Software Support 

Required PRE
Minimum Cisco IOS Releases

PRE1

Cisco IOS Release 12.0(22)S and later releases of Cisco IOS Release 12.0S

PRE2

Cisco IOS Release 12.2(15)BX and later releases of Cisco IOS Release 12.2BX
Cisco IOS Release 12.3(7)XI and later releases of Cisco IOS 12.3XI
Cisco IOS Release 12.2(28)SB and later releases of Cisco IOS 12.2SB


Checking Hardware and Software Compatibility

The PRE installed in the Cisco 10000 series router chassis must support the Cisco IOS software running on the router. Use the show version command to check the PRE version installed.

To see if a feature is supported by a Cisco IOS release, to locate the software document for that feature, or to check the minimum software requirements of Cisco IOS software with the hardware installed on your router, Cisco maintains the Software Advisor tool on Cisco.com at http://www.cisco.com/pcgi-bin/Support/CompNav/Index.pl

This tool does not verify whether line cards within a system are compatible, but does provide the minimum Cisco IOS requirements for individual hardware line cards, modules, or options.

You must be a registered user on Cisco.com to access this tool.

Commands and Default Values

You can operate all the line card ports to accept either E1 or T1 lines, but not both. Once you configure a line card in E1 or T1 mode, you configure all ports on that line card as the same type controller. The commands for configuring either E1 or T1 interfaces are described in the following sections.

E1 Commands

Table 5-2 lists line card commands, default values, and specifies the command syntax you use. This table also includes the commands to use to modify a default value, and indicates whether a similar value (on the remote end of the connection) must be the same (or opposite).

Table 5-2 E1 Line Card Commands and Default Values 

Command Name
Default Value
Command Syntax
Remote Device Setting
Enable Commands

hw-module (reset)

— 
hw-module slot slot reset | subslot 
slot/subslot reset
—

show controllers

— 
show controllers e1 slot/subslot/port
—

show interfaces

— 
show interface serial 
slot/subslot/port:channel-group {accounting 
| controller | crb | description | 
fair-queue | irb | mac-accounting | mpls-exp 
| precedence | random-detect | rate-limit | 
shape}
—
Configure Commands

card

mode e1 

[no] card slot/subslot 24che1t1-1 mode {e1 | 
t1}
—

hw-module (shutdown)

no hw-module 

[no] hw-module {slot slot shutdown | subslot 
slot/subslot shutdown}
—

controller

— 

controller {e1 | t1} slot/subslot/port

—

interface

— 
[no] interface serial 
slot/subslot/port:channel-group
—
Controller Configuration Commands

bert

No bert 

[no] bert pattern {2^11 | 2^15 | 2^20-0153 | 
2^20-QRSS} interval minutes

—

channel-group

No channel-group 

[no] channel-group channel number {timeslots 
timeslots [speed 64] | unframed}

—

clock source

line 

[no] clock source {internal | line}

At least one side set to internal

description

No description 

[no] description text

—

framing

crc4 

[no] framing {crc4 [australia]| no-crc4 
[australia]}

—

linecode

hdb3 

[no] linecode hdb3

—

loopback

No loopback 

[no] loopback {local | network {line | 
payload}}

—

national reserve

No national reserve (0) 

[no] national reserve int sa4 sa5 sa6 sa7 
sa8

—

shutdown

no shutdown 

[no] shutdown

—


E1 Interface Numbering Syntax

You can use the line card in different Cisco series 10000 router chassis. To specify line card E1 interfaces, use the syntax listed in Table 5-3 for the router chassis in use.

Table 5-3 E1 Line Card Interface Syntax

Router
Con troller
Slot
Subslot
Port Number
Channel Group Number

Cisco 10008

E1

1 to 8

/0

/0 to /23

:1 to:31

Cisco 10005

E1

1 to 5

/0

/0 to /23

:1 to:31


Note Because this is a full-height line card, its subslot value is always 0.

Examples:

•Modify E1 controller 0 in slot 2 in controller configuration mode: 

Router(config)# controller e1 2/0/0

Router(config-controller)# command

Router(config-controller)#

•Modifying E1 controller 0, channel-group number 8 in interface configuration mode: 

Router(config)# interface serial 2/0/0:8

Router(config-if)# command

Router(config-if)#

You use the syntax in Table 5-3 to specify slot, subslot, port numbers, and channel-group numbers when configuring ports for E1 operation on a 24-Port Channelized E1/T1 line card.

You can configure a maximum of 744 channelized E1 interfaces on the 24 line card ports (24 ports x 31 E1 timeslots). To do this, you assign a channel-group number to the timeslots of the E1 interface you configure at each port (see the "Specifying E1 Channel Groups" section).

T1 Commands

Table 5-4 lists T1 configuration default values, line card commands, and specifies the values you use. The table includes the commands you use for modifying a default value and indicates whether a similar value, on the remote end of the connection, needs to be the same (or opposite).

Table 5-4 T1 Line Card Commands and Default Values 

Command Name
Default Values
Command Syntax
Remote Device Setting
Enable Commands

hw-module (reset)

— 
hw-module slot slot reset | subslot 
slot/subslot reset
—

show controllers

— 
show controllers t1 slot/subslot/port 
[remote performance]
—

show interface

— 
show interface serial 
slot/subslot/port:channel-group 
{accounting | controller | crb | 
description | fair-queue | irb | 
mac-accounting | mpls-exp | precedence | 
random-detect | rate-limit | shape}
—
Configure Commands

card

mode e1 

[no] card slot/subslot 24che1t1-1 [mode 
{e1 | t1}]
—

hw-module (shutdown)

no hw-module 

[no] hw-module {slot slot shutdown | 
subslot slot/subslot shutdown}
—

controller

— 

controller {e1 | t1} slot/subslot/port

—

interface

— 
[no] interface serial 
slot/subslot/port:channel-group
—
Controller Configuration Commands

bert

No bert 

[no] bert pattern {2^11 | 2^15 | 
2^20-0153 | 2^20-QRSS} interval minutes

—

cablelength

No cablelength 

[no] cablelength short {110 | 220 | 330 | 
440 | 550 | 660}
 

channel-group

No channel-group 

[no] channel-group channel number 
timeslots timeslots [speed {56 | 64}]

—

clock source

line 

[no] clock source {internal | line}

At least one side set to internal

description

No description 

[no] description text

—

fdl

No fdl 

[no] fdl {ansi | att}

—

framing

esf 

[no] framing {esf | sf}

—

linecode

b8zs 

[no] linecode {ami | b8zs}

—

loopback

No loopback 

[no] loop {local | network {line | 
payload} | remote {esf {line | payload} | 
iboc}}

—

shutdown

no shutdown 

[no] shutdown

—

yellow

yellow 

[no] yellow {generation | detection}

—


T1 Interface Numbering Syntax

You can use the line card in different Cisco series 10000 router chassis. To specify line card T1 interfaces, use the syntax listed in Table 5-5 for the router chassis in use.

Table 5-5 T1 Line Card Interface Syntax

Router
Line Interface
Slot
Subslot
Port Number
Channel Group Number

Cisco 10008

T1

1 to 8

/0

/0 to /23

:1 to:24

Cisco 10005

T1

1 to 5

/0

/0 to /23

:1 to:24


Examples:

•Modify T1 controller 0 on slot 2 in controller configuration mode: 

Router(config)# controller T1 2/0/0

Router(config-controller)# command

Router(config-controller)#

•Modifying T1 controller 0, channel-group number 8 in interface configuration mode: 

Router(config)# interface serial 2/0/0:8

Router(config-if)# command

Router(config-if)

You use the syntax in Table 5-4 to specify slot, subslot, port numbers, and channel-group numbers when configuring a port as an T1 controller on a 24-Port Channelized E1/T1 line card.

You can configure a maximum of 576 channelized T1 interfaces on the 24 line card ports (24 ports x 24 T1 timeslots). To do this, you assign a T1 channel-group number to the timeslots of each interface you configure at each port (see the "Specifying T1 Channel Groups" section).

Configuration Task Overview

You can configure the ports of the 24-Port Channelized E1/T1 line card as channelized or unframed E1 interfaces, or as channelized T1 interfaces. To configure an E1 or T1 line card interface, perform the following procedure:

Step 1 Designate the card mode as T1 or E1.

Step 2 Configure the controller parameters and save the configuration to NVRAM.

Step 3 Create one or more serial interfaces at each active port.

Step 4 Specify the interface parameters for each port channel-group and save the configuration to NVRAM.

Note Each time you change the card mode (from E1 to T1 or from T1 to E1), the existing running configuration for the card interface is erased. If you want to keep a line card configuration, you must save it before you change the card mode.

E1 Configuration Examples

The examples in this section familiarize you with the line card configuration tasks and typify how you apply the commands listed in Table 5-2 and the syntax in Table 5-3 to configure a port as an E1 controller. These examples also show how to configure E1 channel-group bandwidth at any of the 24 available ports on the line card. The example steps are intended to quickly familiarize you with the procedures you use to set up an E1 port as an E1 controller.

Note You must be in privileged EXEC mode to specify and configure a port as an E1 controller on any line card port.

Configuring an E1 Controller

From the IOS global configuration mode, you use the config terminal command to enter the controller configuration mode and to configure a card as E1 mode (see the "Configuring a Controller" section for details).

Configuring Full-Rate Unchannelized E1 Bandwidths

To configure the full-rate unchannelized E1 bandwidth at a port, you assign the maximum bandwidth (2048 kbps) when you include unframed on the command line in controller configuration mode. The following example shows the steps you use to create full-rate unchannelized E1 operation at any port.

Step 1 Specify a Controller: To configure the available full E1 bandwidth on an unchannelized port, you select the E1 controller from the global configuration mode: 

Router> enable

Password: (you enter your administrative password)

Router# config terminal 
Enter Configuration commands, one per line. End with CNTRL/Z. 
Router(config)# controller e1 2/0/0

Step 2 Specify a Channel Group: To specify a channel group number as a full-rate unchannelized E1 port, you assign a channel-group number from 1 to 31 and specify unframed: 

Router(config-controller)# channel-group 6 unframed

Router(config-controller)

Note You can not make timeslot assignments on unframed E1 ports.

The channel group command assigns channel-group number 6 to timeslots 0 to 31 (the entire available E1 unframed bandwidth) and subslot 0 at port 0 of the 24-Port Channelized E1/T1 line card in router chassis slot 2.

Whenever you configure an E1 channel-group as unframed, you assign all 32 timeslots (the entire available 2048 kbps E1 bandwidth) to that port and channel group.

Note When you specify unframed for an E1 channel, you only configure a single channel on a port.

Step 3 Specify Additional Controller Parameters: Specify any other E1 controller parameters for this port and other ports (see Table 5-2 and the "Controller Configuration Commands" section).

Step 4 Save the controller configuration to NVRAM 

Router(config-if)# end

Router# write

Step 5 Specify Interface Parameters: Go to interface configuration mode for any channel group you created in the controller configuration mode: 

Router(config)# interface serial 2/0/2:6

Router(config-if)#

Step 6 Enter a value for protocol encapsulation. This example shows the command for using frame relay. You can also choose PPP or HDLC (default). 

Router(config-if)# encapsulation frame-relay

Router(config-if)#

Step 7 If IP routing is enabled on the system, assign an IP address and subnet mask. For example: 

Router(config-if)# ip address 10.16.32.49 255.255.240.0

Step 8 Add any other serial interface configuration commands required to enable other routing protocols and to set other interface characteristics.

Step 9 Be sure all physical port connections have been made on the 24-Port Channelized E1/T1 line card in the Cisco series 10000 router chassis (see the Cisco 10000 Series Router Line Card Hardware Installation Guide).

Step 10 When you have entered all of the necessary interface configuration commands (see the Cisco IOS Interface and Hardware Component Configuration Guide), to complete the configuration, return to the privileged EXEC mode. 

Router(config-if)# end

Router#

Step 11 Write the new configuration to NVRAM: 

Router# copy running-config startup-config

Router#

Configuring Full-Rate Channelized E1 Bandwidths

The following example shows you the steps you use to create a channelized full-rate interface:

Step 1 Specify a Controller: To configure the available channelized full-rate bandwidth of an interface on port 1 of a line card in router chassis slot 2, you must first select the E1 controller from the global configuration mode: 

Router(config)# controller e1 2/0/1

Router(config-controller)

Step 2 Specify a Channel Group: To specify a channel group number for a full-rate channelized E1 port, you assign a channel-group number from 1 to 31 from the controller configuration mode: 

Router(config-controller)# channel-group 7 timeslots 1-31

Router(config-controller)

This command assigns channel-group number 7 and timeslots 1 through 31 (the maximum available 1984 kbps channelized E1 bandwidth) to port 1 of the line card in router chassis slot 2.

Step 3 Specify Controller Parameters: to specify any other controller parameters you enter the controller parameters for the port you have selected (see Table 5-2 and the "Controller Configuration Commands" section).

Step 4 Specify Interface Parameters: Go to interface configuration mode for any channel group you created and specify interface parameters: 

Router(config)# interface serial 2/0/2:6

Router(config-if)#

Configuring Fractional Channelized E1 Bandwidths

To configure an available channelized (framed) fractional E1 bandwidth on a port, you must select the E1 controller from the global configuration mode.

Step 1 The following two examples in this step show you how to configure all the available port 2 E1 timeslots into two interfaces:

Example 1: 

Router(config)# controller e1 2/0/2 
Router(config-controller)# channel-group 8 timeslots 1, 2, 5, 11-31

Router(config-controller)#

These commands configure port 2 time slots 1, 2, 5, and 11 to 31, of the line card in router chassis slot 2 as channel-group (interface) number 8.

Example 2: 

Router(config-controller)# channel-group 9 timeslots 3, 4, 6-10

Router(config-controller)#

Because you are still in the controller configuration mode, you use this command to configure channel-group (interface) number 9 and remaining timeslots 3, 4, and 6 to 10 on port 2 of the 24-Port Channelized E1/T1 line card in router chassis slot 2.

Step 2 Specify Controller Parameters: to specify any other controller parameters you enter the controller parameters for the port you have selected (see Table 5-2 and the "Controller Configuration Commands" section).

To view the available commands you use to configure E1 controller parameters, type a question mark on the command line from the controller configuration mode (see step 2 of the "Configuring Full-Rate Unchannelized E1 Bandwidths" section).

Configuring E1 Serial Interfaces

For a detailed description of how to configure, monitor, and troubleshoot an E1 serial interface, see the Configuration Fundamentals Configuration Guide and the Cisco IOS Interface and Hardware Component Configuration Guide. This section describes the general procedure you use for configuring an E1 controller and an E1 serial interface on any E1/T1 line-card port from the interface configuration mode.

Step 1 Enter the controller configuration mode to configure the controller (see the "Configuring a Controller" section for details).

Step 2 Use the channel-group command to assign framed or unframed E1 bandwidth allotments to the line card ports (see the "Specifying Channel Groups" section for details).

Step 3 Go to interface configuration mode for any channel group you created in the controller configuration mode (see the "Configuring a Serial Interface" section for details.

Step 4 Enter a value for protocol encapsulation. This example shows the command for using frame relay. You can also choose PPP or HDLC (default). 

Router(config-if)# encapsulation frame-relay

Router(config-if)#

Step 5 If IP routing is enabled on the system, assign an IP address and subnet mask. For example: 

Router(config-if)# ip address 10.16.32.49 255.255.240.0

Step 6 Add any other serial interface configuration commands required to enable other routing protocols and to set other interface characteristics.

Step 7 Be sure all physical port connections have been made on the 24-Port Channelized E1/T1 line card in the Cisco series 10000 router chassis (see the Cisco 10000 Series Router Line Card Hardware Installation Guide).


Step 8 When you have entered all of the necessary interface configuration commands (see the Cisco IOS Interface and Hardware Component Configuration Guide), to complete the configuration, return to the privileged EXEC mode. 

Router(config-if)# end

Router#

Step 9 Write the new configuration to NVRAM: 

Router# copy running-config startup-config

Router#

After you create the port serial interface configurations, you can modify them at any time using the appropriate Cisco IOS commands described in the following sections and in the Cisco IOS Interface and Hardware Component Configuration Guide and the Cisco IOS Command References.

T1 Configuration Examples

The examples in this section familiarize you with the line card configuration tasks and typify how you apply the commands listed in Table 5-4 and the syntax in Table 5-5 to configure a T1 controller. These examples also show how to configure T1 channel-group bandwidth at any of the 24 available ports on the line card. The example steps are intended to quickly familiarize you with the procedures you use to set up a T1 port.

Note You must be in privileged EXEC mode to specify and configure a controller for T1 operation on any line card port.

Configuring a T1 Controller

From the IOS global configuration mode, you use the config terminal command to enter the global configuration mode (see the "Configuring a Controller" section for details).

Configuring Full-Rate Channelized T1 Bandwidths

To configure the available channelized (framed) full-rate T1 bandwidth on a line card port, you must select a T1 controller from the global configuration mode. The following example shows you the steps you use to create a channelized full-rate T1 controller:

Step 1 Specify a Controller: To configure the available T1 channelized full-rate bandwidth of an interface on port 1 of a line card in router chassis slot 2, you select a T1 controller from the global configuration mode and then specify all available timeslots from the controller configuration mode: 

Router(config)# controller t1 2/0/1

Router(config-controller)# channel-group 7 timeslots 1-24

Router(config-controller)

These commands assign channel-group number 7 and timeslots 1 through 24 (the maximum available framed T1 bandwidth) to port 1 of the line card in router chassis slot 2.

Step 2 Specify Controller Parameters: to specify any other controller parameters you enter the controller parameters for the controller you have selected (see Table 5-4 and the "Controller Configuration Commands" section).

Configuring Fractional Channelized T1 Bandwidths

To configure an available channelized (framed) fractional T1 bandwidth on a port, you must select a T1 controller from the global configuration mode. The following example shows the procedure you use to create a fractional channelized T1 interface.

Step 1 The following two examples in this step show you how to configure all the available T1 mode port 2 timeslots as interfaces:

Example 1: 

Router(config)# controller t1 2/0/2 
Router(config-controller)# channel-group 8 timeslots 1, 2, 5, 11-24

Router(config-controller)#

These commands configure port 2 time slots 1, 2, 5, and 11 to 24, of the line card in router chassis slot 2 as T1 channel-group (interface) number 8.

Example 2: 

Router(config-controller)# channel-group 9 timeslots 3, 4, 6-10

Router(config-controller)#

Because you are still in the controller configuration mode, you use this command to configure T1 channel-group (interface) number 9 and remaining timeslots 3, 4, and 6 to 10 on port 2 of the line card in router chassis slot 2.

Step 2 Specify Controller Parameters: to specify any other controller parameters you enter the controller parameters for the controller you have selected (see Table 5-4 and the "Controller Configuration Commands" section).

Configuring T1 Serial Interfaces

For a detailed description of how to configure, monitor, and troubleshoot a T1 serial interface, see the Configuration Fundamentals Configuration Guide and the Cisco IOS Interface and Hardware Component Configuration Guide. This section describes the general procedure you use for configuring a T1 serial interface on any line-card port from the interface configuration mode.

Step 1 Enter the controller configuration mode to configure the T1 controller (see the "Configuring a T1 Controller" section).

Step 2 Use the channel-group command to assign framed T1 bandwidths to the line card ports.

Step 3 Go to interface configuration mode for any T1 channel group you created in the controller configuration mode and specify the serial interface channel-group number: 

Router(config)# interface serial 2/0/2:20

Router(config-if)#

Step 4 Enter a value for protocol encapsulation. This example shows the command for using frame relay. You can also choose PPP or HDLC (default). 

Router(config-if)# encapsulation frame relay

Router(config-if)#

Step 5 If IP routing is enabled on the system, assign an IP address and subnet mask. For example: 

Router(config-if)# ip address 10.16.32.49 255.255.240.0

Step 6 Add any other configuration commands required to enable other routing protocols and to set other interface characteristics.

Step 7 Be sure all physical port connections have been made on the line card in the Cisco series 10000 router chassis (see the Cisco 10000 Series Router Line Card Hardware Installation Guide).


Step 8 When you have entered all of the necessary interface configuration commands (see the Cisco IOS Interface and Hardware Component Configuration Guide publication), to complete the configuration, return to the privileged EXEC mode. 

Router(config-if)# end

Router#

Step 9 Write the new configuration to NVRAM: 

Router# copy running-config startup-config

Router#

After you create the port interface configurations, you can modify them at any time using the appropriate Cisco IOS commands described in the following sections and in the Cisco IOS Interface and Hardware Component Configuration Guide and the Cisco IOS Command References.

Command Descriptions

You invoke the various IOS commands using the following Cisco IOS command modes (see Table 5-2):

•Privileged EXEC

•Global Configuration

•Controller Configuration

•Interface Configuration

You must begin configuring the 24-Port Channelized E1/T1 line card from the privileged EXEC command mode.

Privileged EXEC Commands

The Cisco IOS privileged EXEC mode commands are:

•hw-module

•show controllers

•show interfaces

You enter the privileged EXEC configuration mode from the user EXEC mode: 

Router> enable

Password: (you enter your administrative password)

Router#

When your prompt changes to Router# you are in the privileged EXEC mode.

Simulating Line Card Installation and Removal

You use this hw-module command to simulate installation and removal of a line card at any router chassis slot you previously referenced using the card command (see the "Preconfiguring a Line Card" section): 

Router# hw-module {slot slot reset | subslot slot/subslot reset}

Router#

Example:

Router# hw-module slot 5 reset

This command simulates removal and installation of any line card in router chassis slot 5.

This command does not have a no form.

Displaying Controller Information

You use the show controllers command to display information about an E1 or T1 controller configuration at any of the 24 line card ports. Use the following syntax for an E1 controller: 

show controllers e1 slot/subslot/port

Example 1: The following example shows the output displayed on the system console for line card E1 operation in router chassis slot 1, subslot 0, port 0 when this command executes: 

Router# show controller e1 1/0/0

1 1/0/0 is down.

Applique type is Channelized E1 - balanced

Receiver has loss of signal.

Framing is CRC4, Line Code is HDB3, Clock Source is Line.

International Bit: 1, National Bits: 11111

Data in current interval (12 seconds elapsed):

0 Line Code Violations, 0 Path Code Violations

0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins

0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 12 Unavail Secs

Hardware is C10K CHE1T1 line card

Router#

Example 2: The following example shows the output displayed on the system console for a line card operating in T1 mode in router chassis slot 1, subslot 0, port 0 when this command executes: 

Router# show controller t1 1/0/0

1 1/0/0 is down.

Applique type is Channelized T1 - balanced

Receiver has loss of signal.

Framing is esf, Line Code is ami, Clock Source is Line.

Data in current interval (12 seconds elapsed):

0 Line Code Violations, 0 Path Code Violations

0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins

0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 12 Unavail Secs

Hardware is C10K CHE1T1 line card

Router#

Displaying Interface Information

You use the show interface command to display information about the current E1/T1 channel-group (interface) at any of the 24 24-Port Channelized E1/T1 line card ports using the following syntax: 

show interfaces serial slot/subslot/port:channel-group [subcommand]

The Following example shows the output displayed on the system console for the serial interface configuration on router chassis slot 1, subslot 0, port 0, and channel-group 0 when this command executes: 

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

Serial1/0/0:0 is down, line protocol is down 

Hardware is Channelized E1T1 controller

MTU 1500 bytes, BW 64 Kbit, DLY 20000 usec, rely 255/255, load 1/255

Encapsulation HDLC, crc 16, loopback not set

Keepalive set (10 sec)

Last input never, output never, output hang never

Last clearing of "show interface" counters 00:00:18

Queueing strategy: PXF First-In-First-Out

Output queue 0/32, 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

0 carrier transitions alarm present

Timeslot(s) Used: 1, subrate: 64Kb/s, transmit delay is 0 flags

non-inverted data

Router#

This command does not have a no form. You must specify at least one channel group when you use this command. You can also specify a subcommand from a number of associated subcommands (see Table 5-2 and Table 5-4).

Global Configuration Commands

The line card Cisco IOS global configuration commands are:

•card

•hw-module (shutdown)

•controller

•interface

You use the configure terminal command to enter the global mode from the privileged EXEC mode:

Example: 

Router> enable

Password: (you enter your administrative password)

Router# config terminal

Enter Configuration commands, one per line. End with CNTRL/Z. 
Router(config)#

When your prompt changes to Router(config)# you are in the global configuration mode.

Preconfiguring a Line Card

Using the card command you can preconfigure a router chassis slot for a specific line card and operating mode in the absence of such a line card in that slot. After you have preconfigured a router chassis slot for a 24-Port Channelized E1/T1 line card and E1 or T1 operation, when you install a 24-Port Channelized E1/T1 line card into the preconfigured slot, that line card is ready to operate in the preconfigured mode.

When you install a 24-Port Channelized E1/T1 line card in the router chassis slot you have preconfigured, a power-on self test (POST) should immediately take place and the line card should then be ready for operation.

You use the card command in the global configuration mode to preprovision any Cisco 10000 series router chassis slot for line card E1 or T1 operation when no line card is available, or to change modes for a line card that is already installed: 

Router(config)# [no] card slot/subslot 24che1t1-1 [mode {e1 | t1}]

Router(config)#

Where:

•24che1t1-1 is the Cisco E1/T1 line-card Cisco product reference, which you select from a list of optional product references for any line card you can install and configure in a Cisco series 10000 router chassis.

Note The -1 number specifies the current 24-Port Channelized E1/T1 line card revision and may change.

•mode e1 configures all the line card ports for the E1 framing format.

•mode t1 configures the line card ports for the T1 framing format.

The following examples show how to use the card command to simulate the line card controller E1 mode and E1 operation:

•Example 1: In the following example, you configure router chassis slot 3 for E1 operation and use the hw-module and card commands to simulate a 24-Port Channelized E1/T1 line card installation: 

Router> enable

Password: (you enter your administrative password)

Router# hw-module slot 3 reset

Router# config terminal

Enter Configuration commands, one per line. End with CNTRL/Z. 
Router(config)# card 3/0 24che1t1-1 mode e1

Router(config)#

•Example 2: In the following example, you configure router chassis slot 3 for the T1 operation and use the hw-module and card commands to simulate a 24-Port Channelized E1/T1 line card installation: 

Router> enable

Password: (you enter your administrative password)

Router# hw-module slot 3 reset

Router# config terminal

Enter Configuration commands, one per line. End with CNTRL/Z. 
Router(config)# card 3/0 24che1t1-1 mode t1

Router(config)#

The following relationships exist between the Cisco series 10000 router on-line insertion (OIR) feature and the card command:

–When you install a 24-Port Channelized E1/T1 line card into a router chassis slot for which a 24che1t1-1 entry already exists in the running configuration, the OIR feature invokes the existing E1 or T1 controller configuration.

–When you install a 24-Port Channelized E1/T1 line card into a router chassis slot for which no 24che1t1-1 entry exists in the running configuration, the OIR feature invokes the default configuration.

–When you install a 24-Port Channelized E1/T1 line card into a router chassis slot for which a product reference other than 24che1t1-1 exists, the OIR feature invokes the default configuration.

•In this example you simulate the removal of a 24-Port Channelized E1/T1 line card from router chassis slot 3, which you previously specified with the card command.

Note To use the "no" form of card command, the line card must be physically removed from the chassis. 

Router(config)# hw-module slot 3 shutdown

Router(config)# no card 3/0 
Router(config)#

Shutting Down Line Card Simulation

You use this command to turn on and shut down simulated 24-Port Channelized E1/T1 line card operation using the following syntax: 

Router (config)#	[no] hw-module {slot slot shutdown | subslot subslot/slot shutdown}

The following examples show how you use the hw-module shutdown command to shut down or turn on the E1/T1 line-card simulated running configuration:

•In this example, you shut down a simulated running configuration in router chassis slot 5: 

Router(config)# hw-module slot 5 shutdown

Router(config)#

•In this example, you turn on the simulated running configuration of the line card in router chassis slot 5: 

Router(config)# no hw-module slot 5 shutdown

Router(config)#

Configuring a Controller

You use the configure terminal command to enter the global configuration mode and to configure the E1 or T1 controller. To select a chassis slot, subslot, and port E1 controller, you use the following syntax from the global configuration mode: 

Router(config)# controller {t1 | e1} slot/subslot/port

Example 1: In the following example, you select chassis slot 2 E1 controller: 

Router> enable

Password: (you enter your administrative password)

Router# config terminal
Enter Configuration commands, one per line. End with CNTRL/Z.
Router(config)# controller e1 2/0/0
Router(config-controller)#

Example 2: In the following example, you select chassis slot 2 T1 controller: 

Router> enable

Password: (you enter your administrative password)

Router# config terminal
Enter Configuration commands, one per line. End with CNTRL/Z.
Router(config)# controller t1 2/0/0
Router(config-controller)#

Configuring a Serial Interface

For each port you configure at the controller configuration level, you must also configure various associated serial interface parameters for each channel group you previously created at that port. To configure 24-Port Channelized E1/T1 line card serial interfaces for their serial interface parameters, you must be in the interface configuration mode. To specify interface parameters for any channel group you previously created, use the following syntax: 

[no] interface serial slot/subslot/port:channel-group

Use the no form of the channel-group command (see the "Specifying E1 Channel Groups" section and the "Specifying T1 Channel Groups" section) to disable a serial interface at an E1 or T1 port, respectively, and a channel group you previously provisioned.

Example: 

Router> enable

Password: (you enter your administrative Password)

Router# config terminal
Enter Configuration commands, one per line. End with CNTRL/Z.
Router(config)# interface serial 2/0/0:20
Router(config-if)#

These commands establishes the interface configuration mode for the 24-Port Channelized E1/T1 line card in router chassis slot 2, subslot 0, port 0 and channel-group 20. When your prompt changes to Router(config-if)# you can configure the channel group serial interface parameters.

Note You can not specify a channel group until you have first selected an E1 or T1 controller.

Controller Configuration Commands

After installing a 24-Port Channelized E1/T1 line card into a router chassis slot, you configure it in controller configuration mode. You can also preconfigure a router chassis slot and the line-card ports for E1 or T1 mode, and as serial interfaces, before you install a line card into the preconfigured slot (see the "Preconfiguring a Line Card" section).

The controller configuration commands listed in Table 5-2 and in Table 5-4 are those you use to preconfigure or configure a 24-Port Channelized E1/T1 line card controller. You also use these commands to provide the line card with its system functionality. To configure the line card at the E1 or T1 controller level, you perform the following general procedure:

Step 1 Configure or preconfigure a chassis slot for E1 or T1 mode.

Step 2 Configure or preconfigure controller timeslots as channel groups (interfaces).

Step 3 Specify any other E1 or T1 controller parameters.

Step 4 Save the controller configuration by writing it to NVRAM.

E1 Port Interface Density

Using all 24 line card ports, you can configure as many as 744 CE1 interfaces (channels) of any 24-Port Channelized E1/T1 line card you install in a router chassis slot. You can also preconfigure as many channels for that same chassis slot even though the slot does not contain a line card. You use the card command (see the "Preconfiguring a Line Card" section) to preconfigure any router chassis slot, subslot, and port for E1 controller mode that does not contain a line card.

T1 Port Interface Density

Using all 24 line card ports, you can configure as many as 576 CT1 interfaces (channels) of any 24-Port Channelized E1/T1 line card you install in a router chassis slot. You can also preconfigure as many channels for that same chassis slot even though the slot does not contain a T1 line card. You use the card command (see the "Preconfiguring a Line Card" section) to preconfigure any router chassis slot, subslot, and port for T1 controller mode that does not contain a line card.

Controller Commands

This section describes the commands you use to create, customize, and test an E1 or T1 interface at the system level.

After you configure the line card, slot, subslot, port, and channel-group numbers, you can configure other E1 or T1 controller parameters (see the "E1 Configuration Examples" section and the "T1 Configuration Examples" section). You configure the E1 or T1 controller configuration parameters using the commands described in this section:

•Running a BER Test

•Specifying T1 Short-Haul Cable Length

•Specifying Channel Groups

•Specifying a Clock Source

•Adding a Controller Description

•Enabling T1 Facility Data Link Performance Monitoring

•Specifying Framing

•Specifying Linecoding

•Specifying Loopbacks

•Specifying E1 National Reserve Bits

•Specifying a T1 Yellow Alarm

•Specifying Shutdown

Running a BER Test

You can configure an interface to run a BERT (Bit Error Rate Test). You use a BERT to isolate cable signal problems in the field, to check network cabling, and to isolate apparent signaling problems in the field.

Before you begin a network BERT, you need to set up a remote loopback from the far-end (remote) DSU/CSU (see the "Specifying Loopbacks" section).

Use the following loopback commands to set the near end devices (CSU/DSUs) to perform loopbacks:

•loopback local line—Use this loopback submode on both E1 and T1 ports. This submode configures the line card to loop transmitted packets back as received packets after the framer. The line card also receives all incoming packets and outgoing packets are also transmitted to the remote network device.

•loopback network—Use this loopback mode on both E1 and T1 ports. This mode configures the line card to loop packets transmitted from the line card to a remote device back to the line card as received packets. This loopback mode has the following submodes:

–loopback network line—Use this loopback submode on both E1 and T1 ports. This submode configures the line card to loop received packets back to the remote device without first framing them.

–loopback network payload—Use this loopback submode on both E1 and T1 ports. This submode configures the line card to loop received packets back to the remote device after first framing them.

•loopback remote — Operates in T1 mode only (see the "Specifying T1 Loopbacks" section). This loopback mode has the following submodes:

–loopback remote line—Use this loopback submode on T1 ports to configures the far-end device to loop received packets back to the line card without first framing them.

–loopback remote payload—Use this loopback submode on T1 ports to configures the far-end device to loop received packets back to the line card after framing them.

Running an E1 BERT

You can only run a BERT (bit-rate error test) over the full bandwidth of an E1 controller in unframed mode. To send a BERT pattern on a line card E1 interface, use the following controller configuration command syntax: 

[no] bert pattern pattern interval time [unframed]

Where:

•pattern pattern is:

–2^11—pseudorandom test pattern (32,768 bits long)

–2^15—pseudorandom O.151 test pattern (32,768 bits long)

–2^20-O153—pseudorandom O.153 test pattern (1,048,575 bits long)

–2^20-QRSS—pseudorandom QRSS O.151 test pattern (1,048,575 bits long)

•interval time is 1 to 1440 minutes. 

The no form of the bert command is the default. You can terminate a BERT at any time using the no bert 
command.

Note The no bert command terminates a running BERT and, whether running or stopped, inhibits the display of BERT information on the console when you invoke the show controllers command (see the "Displaying Controller Information" section).

Example:

To send a BERT pseudorandom pattern of 2^20-O.153 through E1 interface 1/0/0 for 5 minutes: 

Router(config)# controller e1 1/0/0

Router(config-controller)#	bert pattern 2^20-O153 interval 5 		unframed

Router(config-controller)#

For more information, see the Cisco IOS Interface and Hardware Component Configuration Guide and the Cisco 10000 Series Internet Router Troubleshooting Guide.

Running a T1 BERT

In addition to the local and network loopback configurations described in the "Running a BER Test" section, you can also perform remote loopback testing on T1 interfaces.

Note You can only perform remote loopback testing on T1 ports that also have C-bit parity framing configured.

To send a BERT pattern on a line card T1 interface configured for remote loopback, use the following controller configuration command syntax:

[no] bert pattern pattern interval time

Use the following command to send a BERT pattern to the far-end device:

Example:

To send a BERT pseudorandom pattern of 2^20-O.153 through T1 interface 1/0/0 to the far-end device for 5 minutes: 

Router(config)# controller t1 1/0/0

Router(config-controller)# bert pattern 2^20-O153 interval 5 
Router(config-controller)#

Specifying T1 Short-Haul Cable Length

You can only use the cablelength command on T1 ports. Use this command to compensate short haul lines (under 660 feet) for signal losses associated with line length. To specify cable length for short-haul cables use the following controller configuration command syntax: 

[no] cablelength short {110 | 220 | 330 | 440 | 550 | 660}

Use Table 5-6 to specify the proper short-haul cable length value for cables up to 660 feet long.

Table 5-6 T1 Short-Haul Line Buildout

Line Length (feet)
Cable Length Value

0 to 110

110

110 to 220

220

220 to 330

330

330 to 440

440

440 to 550

550

550 to 660

660


Specifying Channel Groups

A channel group is a serial interface. At a framed E1 port, you can assign bandwidth to as many as 31 channel groups numbered from 1 to 31 in 64-kbps increments called timeslots. When you specify an E1 port as unframed, you only assign a single channel group whose bandwidth is 2048 kbps. At a T1 port, you can assign bandwidth to as many as 24 channel groups in 56- or 64-kbps timeslot increments. T1 ports can not operate in unframed mode.

Specifying E1 Channel Groups

An E1 port has 32 fixed timeslots available. In framed mode, timeslot 0 is used for framing and can not be used. Each E1 timeslot is a 64-kbps DS0 band. To create E1 interfaces that supports subscriber traffic rates from 64 kbps to 2048 kbps on any of the 24 line card ports, you combine timeslots into channel groups. You use the channel-group command to create one or more interfaces at any port operating in E1 mode.

The E1 channel groups have these characteristics:

•A channel group is an interface.

•You partition each line card port into channel groups. A framed port can have as many as 31 E1 channel groups consisting of from 0 to 31 timeslots. At any port:

–A channel group that includes all 32 timeslots (0 to 31) is a single unframed (unchannelized) E1 interface whose bandwidth is 2048 kbps.

–A channel group that includes 31 timeslots (1 to 31) is a single framed (channelized) E1 interface whose bandwidth is 2048 kbps.

–A channel group that consists of fewer than 31 timeslots is a single framed fractional E1 interface whose bandwidth you assign from the port timeslot pool (see the "Configuring an E1 Controller" section).

•Each group of 31 framed timeslots can be grouped into multiple fractional E1 interfaces.

•A timeslot cannot be part of more than one E1 channel group.

After you configure a line card as an E1 controller, you can create one or more logical E1 channel groups from the timeslots available at each port using the following controller command syntax: 

[no] channel-group channel-group-number {timeslots list-of-timeslots [speed 64] | unframed}

Where:

•channel-group channel-group-number is a number from 0 to 30 that you assign to identify each channel group you create.

•timeslots list-of-timeslots can be a value from 1 to 31, or a combination of timeslots from 1 to 31. You indicate a timeslot range using a hyphen, commas, or a combination of both. One timeslot defines a single E1 channel as shown by the following examples.

•speed 64 specifies the digital data rate of a single timeslot as 64 kbps (default).

•unframed specifies a single digital interface whose bandwidth is 2048 kbps. If you do not specify this option, you invoke E1 framing and the channel-group bandwidth depends on the number of timeslots you assign to the interface.

Use the no form of the command to cancel a logical channel group previously created.

The following examples show how you use the channel-group command in E1 mode:

•In this example, you configure channel group 20 as nine timeslots, whose bandwidth is 576 kbps, on port 0: 

Router(config)# controller E1 1/0/0 

Router(config-controller)# channel-group 20 timeslots 1-9

Router(config-controller)#

To access the interface configuration mode for this channel group, you enter: 

Router(config)# interface serial 1/0/0:20

Router (config-if)#

•In this example, an E1 interface includes channel group 18 and consists of all 31 timeslots, creating a full-rate framed E1 interface at port 0: 

Router(config)# controller E1 1/0/0 

Router(config-controller)# channel-group 18 timeslots 1-31

Router(config-controller)#

To access interface configuration mode for this channel group, enter: 

Router(config)# interface serial 1/0/0:18

Router(config-if)#

•In this example, three channelized E1 interfaces are configured as three channel groups, which use 11 of the 31 available timeslots, at port 0: 

Router(config)# controller E1 1/0/0 

Router(config-controller)# channel-group 19 timeslots 1-6

Router(config-controller)# channel-group 20 timeslots 10

Router(config-controller)# channel-group 21 timeslots 7-9, 24

Router(config-controller)#

•In this example, channel groups 19, 20, and 21 are cancelled and timeslots 1 to 10, and 24 are restored to the available port 0 channel-group pool. 

Router(config)# controller E1 1/0/0

Router(config-controller)# no channel-group 19

Router(config-controller)# no channel-group 20

Router(config-controller)# no channel-group 21

Router(config-controller)#

Specifying T1 Channel Groups

A T1 port has 24 fixed timeslots available. Each T1 timeslot is a 56- or 64-kbps DS0 band depending on the configured line speed. To create T1 interfaces that support subscriber traffic rates from 56 kbps to 1344 kbps on any of the 24 line card ports operating at 56 kbps, you combine timeslots into framed channel groups.

To create T1 interfaces that support subscriber traffic rates from 64 kbps to 1536 kbps on any of the 24 line card ports operating at 64 kbps, you do the same.

You use the channel-group command to create one or more interfaces at any port operating in T1 mode. The T1 channel groups have these characteristics:

•A channel group is an interface.

•You partition the line card ports into channel groups. A port can have as many as 24 channel groups consisting of from 1 to 24 (DS0) timeslots. At any port:

–A channel group that includes 24 timeslots (1 to 24) is a single framed (channelized) T1 interface whose bandwidth is 1536 kbps.

–A channel group that consists of fewer than 24 timeslots is a single framed fractional T1 interface whose bandwidth you assign from the T1 port timeslot pool (see the "Configuring a T1 Controller" section).

•Each group of 24 framed timeslots can be grouped into multiple fractional T1 interfaces.

•A channel group cannot be part of more than one T1 interface.

After you configure a line card for T1 mode, you can create one or more logical T1 channel groups from the timeslots available at each port using the following controller command syntax: 

[no] channel-group channel-group-number {timeslots list-of-timeslots [speed 56] | 64}

Where:

•channel-group channel-group-number, timeslots list-of-timeslots, and speed 64 (default) have the same significance as the options described for the E1 channel-group command above in the "Specifying E1 Channel Groups" section.

•speed 56 specifies the digital data rate of a single timeslot as 56 kbps.

The following examples show how you use the channel-group command in T1 mode:

•In this example, you configure channel group 20 as nine timeslots, whose bandwidth is 576 kbps (64 kbps default speed) on port 0: 

Router(config)# controller t1 1/0/0 

Router(config-controller)# channel-group 20 timeslots 1-9

Router(config-controller)#

To access the interface configuration mode for this channel group, you enter: 

Router(config)# interface serial 1/0/0:20

Router (config-if)#

•In this example, a T1 interface includes channel group 18 and consists of all 24 timeslots, creating a full-rate framed T1 interface at port 0: 

Router(config)# controller t1 1/0/0 

Router(config-controller)# channel-group 18 timeslots 1-24

Router(config-controller)#

To access interface configuration mode for this channel group, enter: 

Router(config)# interface serial 1/0/0:18

Router(config-if)#

•In this example, three channelized T1 interfaces are configured as three channel groups, which use 11 of the 24 available timeslots, at port 0: 

Router(config)# controller t1 1/0/0 

Router(config-controller)# channel-group 19 timeslots 1-6

Router(config-controller)# channel-group 20 timeslots 10

Router(config-controller)# channel-group 21 timeslots 7-9, 24

Router(config-controller)#

•In this example, channel groups 19, 20, and 21 are cancelled and timeslots 1 to 10, and 24 are restored to the available port 0 channel-group pool. 

Router(config)# controller t1 1/0/0

Router(config-controller)# no channel-group 19

Router(config-controller)# no channel-group 20

Router(config-controller)# no channel-group 21

Router(config-controller)#

Specifying a Clock Source

You use the clock command to choose whether the transmitted clock signal comes from the received clock or is generated by an internal clock source. You use the following controller command to specify the transmit timing source: 

[no] clock source {line | internal}

Example: 

Router(config-controller)# clock source line

The no form of this command sets the clock source to line, the default state.

Caution You should never configure both sides of an E1 or T1 link to clock source line.

Adding a Controller Description

You can use the description command to identify particulars about a controller interface. You can enter up to 80 characters in your controller description string. To provide additional information about an interface you use to the following controller command: 

[no] description text

Where: text is the description string.

Example: 

Router(config-controller)# description Subscriber X

Enabling T1 Facility Data Link Performance Monitoring

In T1 mode, you can specify the type of FDL (Facility Data Link) performance monitoring to use. You use FDL performance monitoring to verify the integrity of the data link and to transfer statistics between devices. FDL data is a diagnostic tool you use in remote testing of T1 network data links. You can specify either of 2 FDL performance monitoring versions for use in T1 networks:

•ANSI

•ATT

The version differences lie in the message protocols sent to or received from the remote device. To specify the FDL version, use the fdl command: 

[no] fdl {ansi | att}

Where:

•ansi—Conforms with the requirements of the ANSI T1.403-1995 specification to communicate 16-bit data-link code words between the line card and the remote device.

•att—Conforms with the requirements of the AT&T TR 54016-1989 specification to receive 16-bit data-link code words between the line card and the remote device. Note that the 24-port 24-Port Channelized E1/T1 line card will not generate remote performance statistics requests. It only responds to received performance statistics requests.

Specifying Framing

North American T1 facilities operate at a line speed of 1544 kbps. Framing conforms to either of 2 standards:

•D4 Superframe Format (SF)—The standard D4 SF consists of twelve 24-timeslot frames.

•Extended Superframe Format (ESF)—The ESF consists of twenty-four 24-timeslot frames.

European, Australian, and some Asian E1 facilities operate at a maximum line speed of 2048 kbps. Framing conforms to the CCITT G.704 or G.732 specification, which defines sixteen 32-timeslot multiframes. The initial timeslot (0) is used for framing.

Specifying E1 Framing

To specify framing for an E1 interface, use the following framing command: 

[no] framing {crc4 [australia] | no crc4 [australia]}

Example: 

Router# configure terminal

Enter configuration commands, one per line. End with CNTRL/Z.

Router(config)# controller e1 1/0/0 

Router(config-controller)# framing crc4

Router(config-controller)#

Where crc4 is a checksum format used in framing timeslot 0 to provide error detection.

The default framing type is CRC4.

The no form of this command sets framing to the default value.

In Australia, you must also specify australia to obtain proper handling of the clock setting when AIS (alarm indication signal) detection occurs. 

Router(config)# controller e1 1/0/0 

Router(config-controller)# framing crc4 australia

Router(config-controller)#

Specifying T1 Framing

To specify framing for a T1 interface, use the following framing command: 

[no] framing {esf | sf }

Where:

•esf—Specifies the extended superframe format

•sf—Specifies the superframe format

Example: 

Router# configure terminal

Enter configuration commands, one per line. End with CNTRL/Z.

Router(config)# controller t1 1/0/0 

Router(config-controller)# framing sf hdlc-idle 0x7E

Router(config-controller)#

Specifying Linecoding

You specify line coding to establish how physical data appears on the interface line using one of the following formats:

T1 formats:

•AMI (Alternate Mark Inversion)

•B8ZS (Binary 8 Zero Substitution)

E1 formats:

•HDB3 (High Density Bipolar 3)

These line coding formats ensure that line synchronization is maintained.

Specifying E1 Linecoding

Linecode format HDB3 ensures that the E1 receiver remains synchronized in the presence of consecutive 0 bits in received data. In E1 mode, the line card supports HDB3 line encoding only:

[no] linecode hdb3

Where hdb3 specifies the high-density bipolar 3 linecode in which every other 1 bit is of the opposite polarity and bipolar violations are used to automatically maintain proper 1s density.

The no form of this command sets the E1 default linecode to hdb3.

Example: 

Router# configure terminal

Enter configuration commands, one per line. End with CNTRL/Z.

Router(config)# controller e1 1/0/0 

Router(config-controller)# framing hdb3

Router(config-controller)#

Specifying T1 Linecoding

You can specify either AMI or B8ZS line coding for T1 interfaces. In T1 mode, use the following linecode command:

[no] linecode {ami | b8zs}

•ami——specifies alternate mark inversion coding in which every other 1s bit is of the opposite polarity. If two consecutive bits have the same polarity, a bipolar violation occurs.

•b8zs——specifies binary 8 zero substitution in which each group of 8 consecutive zeros is replaced with a bipolar violation to maintain synchronization.

Example: 

Router# configure terminal

Enter configuration commands, one per line. End with CNTRL/Z.

Router(config)# controller t1 1/0/0 

Router(config-controller)# linecode ami

Router(config-controller)#

Specifying Loopbacks

This line card supports local and network E1 and T1 loopback modes, and remote T1 loopback modes for testing, network fault isolation, and agency compliance. You can test E1 and T1 lines in local and network loopback modes. You can also test T1 lines in remote mode.

Specifying E1 Loopbacks

If problems occur when you configure an E1 interface, you can troubleshoot the line card by using the following command in controller configuration mode: 

[no] loopback {local | network {line | payload}}

Where:

•local—Configures the line card to loop transmitted traffic back to the line card as E1 received traffic and sends the local transmit signal to the remote receiver.

Note An E1 port in local loopback mode cannot send AIS due to hardware limitations. It only transmits to the line what it loops back to it's receive. As a result, the remote end will keep receiving packets from a port in local loopback.

•network line—Configures the line card to loop received traffic back to the remote device without passing them through the framer.

•network payload—Configures the line card to loop received traffic back to the remote device after passing them through the framer.

Use the no form of the command to terminate a loopback.

For more information on this command, see the online Cisco 10000 Series Internet Router Troubleshooting Guide.

Example 1:

•Configure an E1 controller port for local loopback. 

Router(config)# controller e1 1/0/0

Router(config-controller)# loopback local

Router(config-controller)#

Example 2:

The following commands configure the E1 controller for local loopback at port 0, channel group 1 

Router(config)# controller e1 1/0/0

Router(config-controller)# loopback local

Router(config-controller)#

Specifying T1 Loopbacks

If problems occur when you configure an T1 interface, you can troubleshoot the line card by using the following command in controller configuration mode: 

[no] loop {local | network {line | payload} | remote {line | payload | iboc}}

Where:

•local—Configures the line card to loop transmitted traffic back to the line card as T1 received traffic and sends the local transmit signal to the remote receiver.

Note A T1 port in local loopback mode cannot send AIS due to hardware limitations. It only transmits to the line what it loops back to it's receive. As a result, the remote end will keep receiving packets from a port in local loopback.

•network line—Configures the T1 framer for the network line submode. In this mode, the line card transmitted packets are not reframed before they are sent to the remote device. The line card also receives all incoming packets.

•network payload—Configures the T1 framer for the network payload submode. In this mode, the line card received packets are reframed before they are sent back to the remote device.

•remote line—Configures the far end T1 in line loopback using the
ESF ANSI protocol.

•remote payload—Configures the far end T1 in payload loopback using the ESF ANSI protocol.

•remote iboc—Configures the far end T1 in line loopback using the SF inband protocol.

Specifying E1 National Reserve Bits

You use national reserve bits, which are embedded in-band control timeslot TS0 to codify a framing protocol for national variations: 

[no] national reserve int sa4 sa5 sa6 sa7 sa8

Where:

•int—This is the national reserved bit.

•Sa4 to Sa8—Specify the country-code bit values.

Example:

Router(config-controller)# controller 2/0/2
Router(config-controller)# national reserve 1 1 1 1 0 1
Router(config-controller)#

The default [no] value of this command is 000000.

Note National reserve bits are active only when the framing no-crc4 command is invoked (see the "Specifying E1 Framing" section).

Specifying a T1 Yellow Alarm

This line card supports the ability to control generation and detection of a T1 yellow Remote Alarm Indication (RAI). You enable or inhibit the RAI yellow alarm using the yellow command:

[no] yellow {generation | detection}

Where:

generation—Enables or inhibits the near- and far-end RAI yellow alarms.

detection—Inhibits or enables the near- end RAI yellow alarms.

Example 1:

This command inhibits far-end yellow alarms. 

Router# configure terminal

Enter configuration commands, one per line. End with CNTRL/Z.

Router(config)# controller t1 1/0/0 

Router(config-controller)# no yellow generation

Router(config-controller)#

Example 2:

This command enables far-end yellow alarms. 

Router# configure terminal

Enter configuration commands, one per line. End with CNTRL/Z.

Router(config)# controller t1 1/0/0 

Router(config-controller)# yellow generation

Router(config-controller)#

Specifying Shutdown

You can shut down an interface. Doing so disables all interface functions and marks the interface as unavailable when you invoke monitoring commands such as show. You enable or shut down operation of an interface using the shutdown command:

[no] shutdown

Example 1: 

Router(config-controller)# no shutdown

Router(config-controller)#

This command enables operation of the specified interface.

Example 2: 

Router(config-controller)# shutdown

Router(config-controller)#

This command halts operation of the specified interface.