Basic System Configuration Guide System Management
Edition: 01 3HE 11010 AAAC TQZZA 213
6.3.1 Active and Standby Designations
Typically, the first CSM installed in a 7705 SAR chassis assumes the role as active,
regardless of being inserted in Slot A or B. The next CSM installed in the same
chassis then assumes the role as the standby CSM. If two CSMs are inserted
simultaneously (or almost simultaneously) and are booting at the same time,
preference is given to the CSM installed in Slot A.
If only one CSM is installed in a 7705 SAR, then it becomes the active CSM
regardless of the slot it is installed in.
To visually determine the active and standby designations, the MS/CTL LED on the
faceplate is lit green (steady) to indicate the active designation. The MS/CTL LED on
the second CSM faceplate is flashing green to indicate the standby designation.
The following output shows that the CSMv2 installed in Slot A is acting as the active
CSM and the CSMv2 installed in Slot B is acting as the standby.
ALU-1# show card
===============================================================================
Card Summary
===============================================================================
Slot Provisioned Type Admin Operational Comments
Equipped Type (if different) State State
-------------------------------------------------------------------------------
1 iom-sar up up
A csmv2-10g up up/active
B csmv2-10g up down/standby
===============================================================================
6.3.2 When the Active CSM Goes Offline
When an active CSM goes offline (due to reboot, removal, or failure), the standby
CSM takes control without rebooting or initializing itself. It is assumed that the CSMs
are synchronized; therefore, there is no delay in operability. When the CSM that went
offline boots and then comes back online, it becomes the standby CSM.
Note: In the CLI, the CSMv2 is shown as csmv2-10g. The CSMv2 supports bandwidth of
10 Gb/s, 2.5 Gb/s and 1 Gb/s in the first two adapter card slots and 2.5 Gb/s and 1 Gb/s in
the remaining four adapter card slots. Support for 2.5 Gb/s and 10 Gb/s adapter cards by
the CSMv2 is only available on the 7705 SAR-8 Shelf V2.
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