R0106-HP MSR Router Series Interface Command Reference(V7)

110
ff: Specifies the interframe filling tag type 0xFF.
Usage guidelines
Interframe filling tags are sent when no service data is sent on the timeslots that are bundled into logical
channels on a CT1/PRI interface.
Examples
# Set the interframe filling tag to 0xFF on T1 2/4/0.
<Sysname> system-view
[Sysname] controller t1 2/4/0
[Sysname-T1 2/4/0] itf type ff
# Set the number of interframe filling tags to 5 on T1 2/4/0.
<Sysname> system-view
[Sysname] controller t1 2/4/0
[Sysname-T1 2/4/0] itf number 5
loopback (CT1/PRI interface)
Use loopback to enable a type of loopback on a CT1/PRI interface.
Use undo loopback to restore the default.
Syntax
loopback { local | payload | remote }
undo loopback
Default
Loopback is disabled.
Views
CT1/PRI interface view
Predefined user roles
network-admin
Parameters
local: Enables local loopback.
payload: Enables external payload loopback.
remote: Enables remote loopback.
Usage guidelines
Loopback is intended for testing only. Disable the feature when the interface is operating correctly.
You can bundle timeslots on a CT1/PRI interface to form a serial interface and encapsulate it with PPP.
After you enable loopback on this serial interface, it is normal that the state of the link layer protocol is
reported as down.
Examples
# Enable local loopback on T1 2/4/0.
<Sysname> system-view
[Sysname] controller t1 2/4/0
[Sysname-T1 2/4/0] loopback local