Cisco Cisco Packet Data Gateway (PDG) Ratgeber Für Administratoren
Troubleshooting
▀ Taking Corrective Action
▄ Cisco ASR 5000 System Administration Guide
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Taking Corrective Action
In the event that an issue was discovered with an installed application or line card, depending on the severity, it may be
necessary to take corrective action.
necessary to take corrective action.
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.
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.
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.
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:
switch over can be invoked by executing the following instructions from the Exec mode prompt:
[local]host_name#
Step 1
Initiate a manual SMC switch over by entering the following command:
card smc switchover
card switch from <24 or 25> to <25 or 24>
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 at the prompt:
show card table
Check the entry in the Oper State column next to the SMC just switched. Its state should be Standby.