Hot Swapping The Ar040 Nsm With Pics; How To Hot Swap A Pic - Allied Telesis AT-AR020 PRI E1/T1 Hardware Reference Manual

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Hot Swapping the AR040 NSM with PICs

The AT-AR040 NSM can be hot swapped with PICs installed in its PIC bays.
There is no need to remove the PICs before hot swapping the NSM.
When an AR040 NSM with PIC cards is hot swapped out, and an identical
combination of AR040 and PICs is hot swapped into the same bay, the software
configurations for the PIC interfaces are preserved across the hot swap. In this
case, modules configured to the PIC interfaces transfer to the newly swapped
in interfaces.
When an AR040 NSM with PICs is hot swapped out and a different
combination of AR040 and PICs is hot swapped into the same bay, new
interface instances are created for any new PIC types or PIC types that are in
different bays (the old interface instances are discarded). For any PIC in the
combination that is replaced by a PIC of the same type, interface instances are
preserved.
The recessed Hot Swap button must be used when hot swapping NSMs. See
the NSM Quick Install Guide or NSM Hardware Reference for the correct
procedure for hot swapping PICs.

How to Hot Swap a PIC

Use this method if the PIC is to be installed or removed from an AR040 NSM,
and the NSM is installed in a switch or router running Software Release 2.3.1 or
later.
WARNING: Failure to follow this procedure when hot swapping a PIC will
cause the router to crash, and may damage files stored in FLASH.
1. Gather the tools and equipment you will need
A medium-sized flat-bladed screwdriver may be useful when loosening
the PIC thumbscrews.
You should also have any cables required for connecting the PIC to a wide
area network or other network devices.
2. Prepare the PIC bay for hot swap
Do not attempt to hot swap while the contents of FLASH are being modified;
for instance, during FLASH compaction or when files are being loaded onto the
switch or router. If the switch or router crashes while FLASH is being modified,
configuration files, software release files, feature licences and other files may be
damaged.
If the In Use LED (next to the NSM bay) is lit, use a pencil tip or similar
object to press the recessed Hot Swap button. The In Use LED should go
out and the Swap LED should light.
If the In Use LED remains lit, or if neither the In Use or Swap LED are lit,
the software release does not support hot swapping, and the Standard
Installation Method must be used to install or remove the PIC.
Port Interface Card
C613-03023-00 REV J