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Enabling Nonstop Active Routing

Nonstop active routing (NSR) requires you to configure graceful Routing Engine switchover (GRES). To enable graceful Routing Engine switchover, include the graceful-switchover statement at the [edit chassis redundancy] hierarchy level:



[edit chassis redundancy]

graceful-switchover;

By default, nonstop active routing is disabled. To enable nonstop active routing, include the nonstop-routing statement at the [edit routing-options] hierarchy level:



[edit routing-options]

nonstop-routing;

To disable nonstop active routing, remove the nonstop-routing statement from the [edit routing-options] hierarchy level.

Note: When you enable nonstop active routing, you cannot enable automatic route distinguishers for multicast VPN routing instances. Automatic route distinguishers are enabled by configuring the route-distinguisher-id statement at the [edit routing-instances instance-name] hierarchy level; for more information, see the JUNOS VPNs Configuration Guide.

To enable the routing platform to switch over to the backup Routing Engine when the routing protocol process (rpd) fails rapidly three times in succession, include the other-routing-engine statement at the [edit system processes routing failover] hierarchy level.

For more information about the other-routing-engine statement, see the JUNOS System Basics Configuration Guide.

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