Cisco ASR 5500 Installatiehandleiding - Pagina 20

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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.

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.

Switching MIOs

When the system boots up, the MIO/UMIO/MIO2 installed in chassis slot 5 will boot into the Active mode

and begin booting other system components. The MIO/UMIO/MIO2 installed in chassis slot 6 will automatically

be booted into Standby mode dictating that it will serve as a redundant component. The active

MIO/UMIO/MIO2 automatically synchronizes currently running tasks or processes with the standby

MIO/UMIO/MIO2.

In the event of a critical failure on the MIO/UMIO/MIO2 in slot 5, system control will be automatically

switched to the standby MIO/UMIO/MIO2 in slot 6. This is a relatively seamless transition because the two

are synchronized. The formerly active MIO 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 switchover can be invoked by executing the following commands from the Exec mode prompt.

Step 1

Initiate a manual MIO/UMIO/MIO2 switch over by entering the following command:

[local]host_name#

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 show card table command at the Exec mode prompt:

Check the entry in the Oper State column next to the MIO/UMIO/MIO2 just switched. Its state should be Standby.

Busying Out a DPC

This busy-out command moves processes from the source DPC/UDPC or DPC2/UDPC2 to the destination

DPC/UDPC or DPC2/UDPC2, or disables the DPC/UDPC or DPC2/UDPC2 from accepting any new calls.

When busy-out is enabled, the DPC/UDPC or DPC2/UDPC2 stops receiving new calls but continues to process

calls until they are completed. The command prompt is returned once the command is initiated. The busy-out

procedure is completed in background.

Step 1

Initiate a busy-out by entering the following command:

[local]host_name#

Troubleshooting

card switch from

<5 or 6>

card busy-out

slot_number

<6 or 5>

Troubleshooting