R2511-HP MSR Router Series Interface Command Reference(V5)

289
Views
POS interface view
Default command level
2: System level
Parameters
fr: Specifies Frame Relay as the link layer protocol of the interface.
ietf: Adopts the Interface Engineering Task Force (IETF) standard encapsulation format, which is the
default encapsulation format.
mfr interface-number: MFR interface or subinterface number. The specified interface must be one that
already exists.
nonstandard: Adopts non-IETF standard compatible encapsulation format.
hdlc: Specifies High-level Data Link Control (HDLC) as the link layer protocol of the interface.
ppp: Specifies the Point-to-Point protocol (PPP) as the link layer protocol of the interface.
Examples
# Specify HDLC as the link protocol of POS 1/0.
<Sysname> system-view
[Sysname] interface pos 1/0
[Sysname-Pos1/0] link-protocol hdlc
loopback
Use loopback to enable loopback for a POS interface.
Use undo loopback to disable loopback.
Syntax
loopback { local | remote }
undo loopback
Default
Loopback is disabled.
Views
POS interface view
Default command level
2: System level
Parameters
local: Enables internal loopback.
remote: Enables external loopback.
Usage guidelines
Loopback is intended for test use. Disable it otherwise.
If you enable loopback on a POS interface encapsulated with PPP, it is normal that the state of the link
layer protocol is reported up.