Equipment Loopback Command - Cisco 10000 Series Configuration Manual

Interface Configuration Commands

Equipment Loopback Command

Use the equipment loopback command to specify whether or not a T3 port for the near-end device will
accept remote loopback requests from the far-end device.
Note Because remote loopback requests are available only when c-bit framing is invoked, the equipment
loopback command is useful only when framing is set to c-bit or auto-frame-detect.
[no] equipment [customer | network] loopback
The default mode is customer.
Use the no form of this command to disable the equipment selection and revert back to auto-detect as
the framing value (see
The following examples show how to the equipment loopback command:
Equipment Customer Loopback Command
When you invoke the equipment customer loopback command, the near-end T3 port accepts far-end
loopback requests.
Router(config)# interface dsx3 1/0/0
Router(config-if)# equipment customer loopback
Note Specify equipment customer loopback as the equipment type, unless you want to block the far end
from setting near-end loopbacks.
Equipment Network Loopback Command
When you invoke the equipment network loopback command, the near-end T3 port ignores far-end
loopback requests.
Router(controller)# interface dsx3 1/0/0
Router(config-if)# equipment network loopback
Fallback-Clocking Command
Use the fallback-clocking command to force the setting on the master clock to internal on receipt of an
AIS message. This command is used only for E3 serial interfaces.
We recommend that you use the fallback clock command only in countries in which regulations require
Note
it.
Use the fallback-clocking command using the following format:
[no] fallback-clocking [on | off]
The default is off.
Use the no form of this command to restore the E3 interface default, which causes the controller to revert
back to programmed E3 clocking.
Cisco 10000 Series Router Line Card Configuaration Guide
15-12
Setting the Framing Type, page
Chapter 15 8-Port Unchannelized E3/T3 Line Card Configuration
15-13).
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