Cisco ASR 5000 Installation Manual - Page 22
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Manually Initiating a Management Card Switchover
The system provides several redundancy and fail-over mechanisms to address issues with application and line
cards in order to minimize system downtime and data loss. These mechanisms are described in the sections
that follow.
Manually Initiating a Management Card Switchover
When the system boots up, the SMC installed in chassis slot 8 will boot into the "active" mode and begin
booting other system components. The SMC installed in chassis slot 9 will automatically be booted into
"standby" mode dictating that it will serve as a redundant component. However, the active SMC will frequently
synchronize currently running tasks or processes with the redundant SMC.
In the event of a critical failure on the SMC in slot 8, system control will be switched to the redundant SMC
in slot 9. This is a relatively seamless transition because the two are synchronized. The formerly active SMC
will then enter the standby mode allowing it to be safely replaced or restored.
In the event that an issue arises that is not severe enough for the system to perform an automatic switchover,
a manual switch over can be invoked by executing the following instructions from the Exec mode prompt.
Step 1
Initiate a manual SMC switch over by entering the following command:
host_name
[local]
host_name
[local]
You will receive the following prompt:
Are You Sure? [Yes|No]:
Step 2
Press Y to start the switchover.
Step 3
Verify that the switchover was successful by entering the following command.
host_name
[local]
Check the entry in the Oper State column next to the SMC just switched. Its state should be Standby.
Manually Initiating a Packet Processing Card Migration
When the system boots up, all packet processing cards enter the "standby" mode. The standby mode indicates
that the card is available for use but is not configured for operation. Installed components can be made active
through the software configuration process. Cards that are not configured to enter the "active" mode will
remain in standby mode for use as redundant components.
In the event of the critical failure of a packet processing card, tasks will be automatically be migrated from
the active card to a redundant card in standby mode. The line card installed behind the packet processing card
that was formerly active will still be used to maintain the interfaces to external network equipment. Installed
Redundancy Crossbar Cards (RCCs) will provide a path for signalling and data traffic between the line card
and the now active packet processing card. Therefore, redundant packet processing cards do not require that
line cards be installed behind them.
ASR 5000 System Administration Guide, StarOS Release 21.2
22
card smc switchover
#
card switch from <24 or 25> to <25 or 24>
#
show card table
#
Troubleshooting