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

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Field Description
Output:0 packets, 0 bytes
0 errors, 0 underruns, 0 collisions
0 deferred
Sent statistics on the BRI interface:
• errors—Number of error packets detected at the physical layer.
• underruns—Number of packets that fail to be forwarded
because the interface reads from memory at a slower speed
than it forwards packets.
• collisions—Number of packets with collisions detected.
• deferred—Number of deferred or timeout packets.
Link: ADM - administratively down; Stby -
standby
Link status:
• ADM—The interface has been administratively shut down. To
recover its physical state, use the undo shutdown command.
• Stby—The interface is operating as a backup interface. To see
the primary interface, use the display standby state command
in High Availability Command Reference.
Protocol: (s) - spoofing
If the network layer protocol state of an interface is shown as UP,
but its link is an on-demand link or not present at all, its protocol
attribute includes the spoofing flag (an s in parentheses).
Interface Abbreviated interface name.
Link
Physical link state of the interface:
• UP—The link is up.
• ADM—The link has been administratively shut down. To
recover its physical state, use the undo shutdown command.
Protocol
Protocol connection state of the interface, which can be UP,
DOWN, or UP(s).
Main IP Main IP address of the interface.
Description Description of the interface.
Cause
Cause of a DOWN physical link. If the port has been shut down
with the shutdown command, this field displays Administratively.
To restore the physical state of the interface, use the undo
shutdown command.
loopback (ISDN BRI interface)
Use loopback to set the B1, B2, or both channels on the ISDN BRI interface in external loopback. This
allows data from a line to be sent back to the line.
Use undo loopback to restore the default.
Syntax
loopback { b1 | b2 | both }
undo loopback
Default
Loopback is disabled on ISDN BRI interfaces.
Views
ISDN BRI interface view