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ATM Switch Router Software Configuration Guide
OL-7396-01
Chapter 5 Configuring Redundancy
Configuring Switch Fabric Enhanced High System Availability Operation (Catalyst 8540 MSR)
Caution Do not hot swap an active switch processor module before putting it in standby mode. Removing an
active switch processor breaks active connections and stops the flow of traffic through the switch. Put
an active switch in standby mode using the redundancy preferred-switch-card-slots command before
removing it from the chassis.
When a switchover to the standby switch processor occurs, the system resets and all connections are lost.
When the system comes up again, all PVCs, PVPs, Soft VCs, and Soft VPs are reestablished
automatically.
Configuring Preferred Switching Processors (Catalyst 8540 MSR)
To configure which two of the three switch processors are active and which runs in standby mode, use
the following privileged EXEC command on the primary route processor:
Example
In the following example, the preferred switch processors are configured to be in slots 5 and 7 with the
slot 6 switch processor running in standby mode:
Switch# redundancy preferred-switch-card-slots 5 7
The preferred switch cards selected are already active
Note The preferred switch card slot configuration reverts to the default configuration when the switch is power
cycled.
Displaying the Preferred Switch Processor Redundancy Configuration (Catalyst 8540 MSR)
To display the preferred switch processor redundancy configuration, use the following privileged EXEC
commands:
The following example shows the preferred switch processor configuration and status:
Switch# show preferred-switch-card-slots
The currently preferred switch card slots are slot: 5 and slot: 7
The currently active switch card slots are slot: 5 and slot: 7
Switch# show switch fabric
swc_presence_mask: 0x5
Switch mode: NR_20G
Number of Switch Cards present in the Chassis: 2
Command Purpose
redundancy preferred-switch-card-slots
{5 | 6 | 7} {5 | 6 | 7}
Configures the active and standby switch
processors.
Command Purpose
show preferred-switch-card-slots Displays the preferred switch processor
configuration.
show switch fabric Displays the switch processor status.