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Chapter 2: Hot Swapping Line Cards and Control Modules
52 SmartSwitch Router User Reference Manual
Warning
: You can only hot swap an inactive Control Module. You should never remove
the active Control Module from the SSR. Doing so will crash the system.
The procedure for hot swapping a control module is similar to the procedure for hot
swapping a line card. You must deactivate the Control Module, remove it from the SSR,
and insert another Control Module or line card in the slot.
Deactivating the Control Module
To deactivate the Control Module:
1. Determine which is the secondary Control Module.
Control Modules can reside in slot CM or slot CM/1 on the SSR. Usually slot CM
contains the primary Control Module, and slot CM/1 contains the secondary Control
Module. On the primary Control Module, the Online LED is lit, and on the secondary
Control Module, the Offline LED is lit.
Note: The Offline LED on the Control Module has a different function from the
Offline LED on a line card. On a line card, it means that the line card has been
deactivated. On a Control Module, a lit Offline LED means that it is standing
by to take over as the primary Control Module if necessary; it does not mean
that the Control Module has been deactivated.
2. Press the Hot Swap button on the secondary Control Module.
When you press the Hot Swap button, all the LEDs on the Control Module (including
the Offline LED) are deactivated. Figure 2 shows the location of the Offline LED and
Hot Swap button on a Control Module.
Figure 2. Location of Offline LED and Hot Swap button on a Control Module
Removing the Control Module
To remove a Control Module from the SSR:
1. Make sure that none of the LEDs on the Control Module are lit.
2. Loosen the captive screws on each side of the Control Module.
3. Carefully remove the Control Module from its slot in the SSR chassis.
10/100 Mgmt
Console
RST
SYS
OK
ERR DIAG
HBT
Hot
Swap
Online Offline
Hot Swap Button
SSR-CM2 CONTROL MODULE
Offline LED