Specifying Whether the Route Is Permanently Installed in the Forwarding Table

By default, statically configured routes are deleted from the forwarding table when the routing protocol process shuts down normally. To have an IPv4 static route remain in the forwarding table, include the retain statement. Doing this greatly reduces the time required to restart a system that has a large number of routes in its routing table.

To have an IPv6 static route remain in the forwarding table, include the retain statement. Doing this greatly reduces the time required to restart a system that has a large number of routes in its routing table.

To explicitly specify that IPv4 routes be deleted from the forwarding table, include the no-retain statement. Include this statement when configuring an individual route in the route portion of the static statement to override a retain option specified in the defaults portion of the statement.

To explicitly specify that IPv6 routes be deleted from the forwarding table, include the no-retain statement. Include this statement when configuring an individual route in the route portion of the static statement to override a retain statement specified in the defaults portion of the statement.

For a list of hierarchy levels at which you can include these statements, see the statement summary sections for these statements.

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