Configuring Loopback Mode - Cisco 10000 Series Configuration Manual

Channelized T3 Commands

Configuring Loopback Mode

You can configure the T3 controller for loopback mode using the loopback command.
[no] loopback
Local and network loopbacks are the same.
To cancel a loopback, use the no form of the command.
For more information on the loopback command, refer to the online
Troubleshooting
Examples:
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Note
Running Equipment Loopbacks
Use the equipment loopback command to run loopbacks in conjunction with remote equipment.
[no] equipment
Where:
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Use the no form of the command to terminate the loopback.
For more information on the loopback command, refer to the online
Troubleshooting
In the following example, an equipment network loopback is configured:
Router(config)# interface serial 1/0/0
Router(config-if)# equipment network loopback
Channelized T3 Commands
By default, a T3 interface on a 4-Port Channelized T3 Half-Height line card is channelized into 28 T1
interfaces. This section describes the commands you use to customize and test a channelized T3
interface. This section describes:
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Cisco 10000 Series Router Line Card Configuaration Guide
4-12
[ |
local network
Guide.
Configure the T3 controller for local loopback.
Router(config)# interface serial 1/0/0
Router(config-if)# loopback local
Configure the T3 controller for remote loopback.
Router(config)# interface serial 1/0/0
Router(config-if)# framing c-bit
Router(config-if)# loopback remote
Remote loopback works only when framing is set to c-bit.
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customer network
customer enables the line card to respond to remote T3 loopback commands from the remote T3
equipment.
network causes the line card to ignore remote T3 loopback commands.
Guide.
Configuring a T3 Interface as Channelized, page 4-13
Specifying the Cable Length, page 4-14
Chapter 4 4-Port Channelized T3 Half-Height Line Card Configuration
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remote
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loopback
Cisco 10000 Series Internet Router
Cisco 10000 Series Internet Router
OL-8834-04