Routing Information Protocol

Routing Information Protocol (RIP) is a distance-vector routing protocol that uses hop count as the metric for path selection. When RIP is enabled on an interface, the interface exchanges RIP broadcasts with neighboring devices to dynamically learn about and advertise routes.

The security appliance support both RIP version 1 and RIP version 2. RIP version 1 does not send the subnet mask with the routing update. RIP version 2 sends the subnet mask with the routing update and supports variable-length subnet masks. Additionally, RIP version 2 supports neighbor authentication when routing updates are exchanged. This authentication ensures that the security appliance receives reliable routing information from a trusted source.

You can have two OSPF routing processes and one RIP routing process running on the security appliance at the same time.

Limitations

RIP has the following limitations:

•The security appliance cannot pass RIP updates between interfaces.

•RIP Version 1 does not support variable-length subnet masks.

•RIP has a maximum hop count of 15. A route with a hop count greater than 15 is considered unreachable.

•RIP convergence is relatively slow compared to other routing protocols.

•You can only enable a single RIP process on the security appliance.