Enterasys Networks X-Pedition XSR CLI - Manual (Page 77)

T1/E1 & T3/E3 Commands
XSR CLI Reference Guide 2-71
Syntax of the “no” Form
no loopback
Default
Disabled
Mode
Controller configuration: XSR(config-controller<xx>)#
Examples
The following example initiates a local loopback test:
XSR(config)#controller t1 1/0
XSR(config-controller)#framing esf
XSR(config-controller)#linecode b8zs
XSR(config-controller)#channel-group 0 timeslot 1-24 speed 64
XSR(config-controller)#loopback local
The following example configures an IP address as a loopback interface:
XSR(config)#interface loopback 0
XSR(config-if)#ip address 193.23.24.1 255.255.255.255
XSR(config-if)#no shutdown
national bit
For E3 controllers only
This command sets the national bit in the E3 frame ‐ bit 12.
Syntax
national bit {0 | 1}
Syntax of the “no” Form
The no form of this command sets the national bit to the default value:
no national bit
local line Local loopback mode loops the entire bandwidth of the T1/E1/ISDN‐PRI
line toward the network. Use external equipment to verify that the T1/E1/
ISDN‐PRI port is connected to the line.
local payload Same as Local line, it merely loops back the T1 payload, that is, the XSR
generates framing at 1.536 MBytes/sec.
0 Sets the national reserved bit to 0.
1 Sets the national reserved bit to 1.