Behaviour Of Hot Swapped Interfaces - Allied Telesis AT-AR020 PRI E1/T1 Hardware Reference Manual

24
7. Secure the PIC by tightening its thumbscrews
8. Return the NSM bay to use
Press the recessed Hot Swap button. The Swap LED will go out and the
In Use LED will light.
If the In Use LED lights only briefly and the Swap LED then lights
continuously, the software release does not support hot swapping of this
type of PIC.
9. Test the PIC
There are several ways to check that the PIC is installed and functioning
correctly.
The show system command displays general system information about
PICs and any other hardware installed, as well as memory, software release
and patches loaded on the switch or router.
"PIC Testing and Verification" on page 26
procedure for testing PICs, and
possible faults and their solutions.

Behaviour of Hot Swapped Interfaces

When an interface (PIC or NSM) is hot-swapped out, its interface instances
become dormant. They stay dormant until either another interface of the same
type is hot-swapped into the bay, in which case they are reactivated, or an
interface of a different type is hot-swapped into the bay, in which case they are
discarded.
Dormant interfaces are included in the show interface command output and in
the SNMP interfaces MIB, marked as swapped out. In other router or switch
commands, however, the router or switch behaves as though dormant
interfaces do not exist.
Instances of higher-level modules (such as LAPD and Q931, ISDNCC, PPP, and
IP) do not become dormant when an interface becomes dormant. Instead they
behave as if the interface has stopped communicating, for example, as if the
cable has been unplugged.
The configuration script is not scanned for commands relating to hot-inserted
interfaces until the switch or router is restarted. These interfaces must be
configured manually.
The switch or router does not update the MAC address of any hot-swapped
Ethernet interface until the switch or router is restarted.
The show interface command is modified to show "Swapped out" in the
ifOperStatus column for dormant interface instances.
All other commands that show or set interface properties behave as if
swapped-out interfaces do not exist. Commands that operate on multiple
interfaces skip swapped-out interfaces. Commands specified explicitly to a
dormant interface display an error message.
describes the recommended
"Troubleshooting" on page 45
Port Interface Card
outlines
C613-03023-00 REV J