# Enabling RIP on Dynamic IP Interfaces

You can use the ip rip copy-to-dynamic command to enable RIP on dynamic, unnumbered IP interfaces. This command allows the dynamic interfaces, as they are created, to copy RIP settings from a numbered IP interface to which the interfaces refer for their source address.

| Caution: RIP transmits a complete set of routing updates at each update interval. This can result in a very large number of RIP updates. When configuring RIP over dynamic interfaces, we strongly recommend that you configure an output policy on the reference interface to limit the amount of routing information that RIP transmits to each peer.

ip rip copy-to-dynamic

- Use to enable RIP on dynamic, unnumbered IP interfaces. This command allows the dynamic interfaces to copy RIP settings from the numbered IP interface to which the interfaces refer for their source address.
- Once created, the dynamic RIP interfaces do not track configuration changes on the numbered interface from which they originally inherited the configuration. To reinherit RIP settings, use the clear ip rip dynamic-interfaces command.

  | Caution: Issuing the ip rip copy-to-dynamic command enables RIP on all dynamic unnumbered interfaces that reference the interface and become active after issuing the command. This may unintentionally include dynamic interfaces created on MPLS tunnels or subscriber interfaces where you would not want to enable RIP. To avoid this possible misconfiguration, take care to reference dynamic interfaces where RIP is not required to another numbered interface on which RIP is not enabled.

- Example
  host1(config-if)#ip rip copy-to-dynamic
- Use the no version to stop the use of RIP configuration on any new, dynamic, unnumbered IP interfaces. The no version does not remove all existing, active RIP interfaces that were created after issuing this command. To remove all existing, active RIP interfaces, use the no rip copy-to-dynamic command to stop the use of RIP on any new, dynamic interfaces, and then use the clear ip rip dynamic-interfaces command to clear any existing RIP dynamic interfaces.
- See ip rip copy-to-dynamic