R3303-HP HSR6800 Routers Interface Command Reference

225
undo loopback
Default
Loopback is disabled.
Views
CPOS interface view
Default command level
2: System level
Parameters
local: Internal loopback, used for testing the physical interface itself.
remote: External loopback, used for testing the cable connected to the interface.
Usage guidelines
Loopback is intended for test use. Disable it otherwise.
Examples
# Enable external loopback testing on interface CPOS 2/0/0.
<Sysname> system-view
[Sysname] controller cpos 2/0/0
[Sysname-Cpos2/0/0] loopback remote
multiplex mode
Use multiplex mode to set AUG multiplexing mode.
Use undo multiplex mode to restore the default.
Syntax
multiplex mode { au-3 | au-4 }
undo multiplex mode
Default
The AUG multiplexing mode is au-4.
Views
CPOS interface view
Default command level
2: System level
Parameters
au-3: Gets AUG through AU-3.
au-4: Gets AUG through AU-4.
Usage guidelines
SDH provides two payload mapping/multiplexing solutions: ANSI and ETSI.
• ANSI uses the AU-3 multiplexing scheme, where the lower-order payload is aggregated into the
VC-3 higher-order path. VC-3 plus an AU pointer forms AU-3. Three such AU-3s can be
synchronized and multiplexed to form one AUG.