Configuring High System Availability
Automatic synchronization mode is on by default; however, to turn it on manually, use the following commands beginning in privileged EXEC configuration mode:
| Command | Purpose |
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Step 1 | Router# configure terminal | Enters global configuration mode. |
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Step 2 | Router(config)# slave | Enables automatic synchronization mode. |
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Step 3 | Router(config)# end | Exits global configuration mode. |
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Step 4 | Router# copy system: | Saves this information to your startup |
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| configuration and copies the configuration to the |
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| standby’s startup configuration. |
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The following example turns on automatic configuration file synchronization:
Router# configure terminal
Router(config)# slave
Router(config)# end
Router# copy
Ensuring that Both RSPs Contain the Same System Image
For simple hardware backup, ensure that both RSP cards have the same system image.
To ensure that both RSPs have the same system image, use the following commands beginning in privileged EXEC configuration mode:
| Command | Purpose |
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Step 1 | Router# show bootvar | Displays the contents of the BOOT environment variable |
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| to learn the current booting parameters for the active and |
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| the standby RSP. |
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Step 2 | Router# dir {bootflash: slot0: slot1:} | Verifies the location and version of the active RSP |
| or | software image. |
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| Router# show {bootflash: slot0: slot1:} |
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Step 3 | Router# dir {slavebootflash: slaveslot0: | Determines if the standby RSP contains the same |
| slaveslot1:} | software image in the same location. |
| or |
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| Router# show {slavebootflash: slaveslot0: |
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| slaveslot1:} |
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Step 4 | Router# copy {bootflash:[filename] | Copies the active’s system image to the appropriate |
| slot0:[filename] | standby location. Use this command if the standby RSP |
| slot1:[filename]}{slavebootflash:[filename] | does not contain the same system image in the same |
| slaveslot0:[filename] slaveslot1:[filename]} | location. |
| Note You might also have to use the delete and/or | Note Deleted space is not reusable until after you |
| squeeze command in conjunction with the | perform the squeeze command. |
| copy command to accomplish this step. |
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Route Switch Processor (RSP8) Installation and Configuration Guide
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