Hot swapping, Hot swapping an at-ar040 or at-ar040-b nsm – Allied Telesis AT-AR048-B User Manual
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Network Service Module
613-000610 Rev C
Hot Swapping
There are two methods for installing and removing NSMs: the standard installation
method and the hot swap installation method. The software release running on your
switch or router determines which of these two methods should be used.
If your switch or router is running Software Version 2.2.3 or earlier, follow the
standard method. If your switch or router is running Software Version 2.3.1 or later,
you can use the hot swap method.
To find out which software release your switch or router is running, use the
command:
show system
The following installation procedure describes how to install an NSM using either
installation method.
Hot swapping an AT-AR040 or AT-AR040-B NSM
Caution You cannot install PICs into an AT-AR040 or AT-AR040-B NSM that has
power applied to it. This includes NSMs that have been deactivated using the hot
swap button, but not physically removed from the switch or router. To ensure that
all power is removed from the NSM bay, you must either physically remove it from
the switch or router using the hot swap method, or disconnect all power sources to
the switch or router.
If you are installing an AT-AR040 or AT-AR040-B NSM and you have PICs to install,
follow the Port Interface Card Installation and Safety Guide. You can download this
document from
If there are more PIC bays
than PICs, use the bays on the switch or router base unit first, then fill the NSM PIC
bays starting with bay 0.
You can hot swap the AT-AR040 or AT-AR040-B NSM with PICs already installed in
its PIC bays. There is no need to remove the PICs before hot swapping. See the
Network Service Module Hardware Reference for information on the operational
characteristics of hot swapped interfaces. You can download this document from
.