Hot swapping, Hot swapping an at-ar040 – Allied Telesis Network Service Module User Manual
Page 7
6
Network Service Module
613-000610 Rev B
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
Caution You cannot install PICs into an AT-AR040 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 NSM and you have PICs to install, follow the Port
Interface Card Installation and Safety Guide. You can download this document from
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 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