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Graceful Routing Engine Switchover

The extended DHCP relay agent supports graceful Routing Engine switchover on all routing platforms that contain dual Routing Engines. To support graceful Routing Engine switchover, the DHCP relay agent automatically mirrors (replicates) information about the state of bound DHCP clients from the master Routing Engine to the backup Routing Engine.

To enable graceful Routing Engine switchover support for the extended DHCP relay agent, include the graceful-switchover statement at the [edit chassis redundancy] hierarchy level. You cannot disable graceful Routing Engine switchover support for the extended DHCP relay agent when the router is configured to support graceful Routing Engine switchover.

For more information about using graceful Routing Engine switchover, see the JUNOS High Availability Configuration Guide.

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