Cisco ASA 5505 Configuration Manual page 407

Configuring RIP
This chapter describes how to configure the adaptive security appliance to route data, perform
authentication, and redistribute routing information, using the Routing Information Protocol (RIP).
The chapter includes the following sections:
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Overview
The Routing Information Protocol, or RIP, as it is more commonly called, is one of the most enduring
of all routing protocols. RIP has four basic components: routing update process, RIP routing metrics,
routing stability, and routing timers. Devices that support RIP send routing-update messages at regular
intervals and when the network topology changes. These RIP packets contain information about the
networks that the devices can reach, as well as the number of routers or gateways that a packet must
travel through to reach the destination address. RIP generates more traffic than OSPF, but is easier to
configure.
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 adaptive 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 adaptive
security appliance receives reliable routing information from a trusted source.
RIP has advantages over static routes because the initial configuration is simple, and you do not need to
update the configuration when the topology changes. The disadvantage to RIP is that there is more
network and processing overhead than static routing.
OL-20339-01
Overview, page 22-1
Licensing Requirements for RIP, page 22-2
Guidelines and Limitations, page 22-3
Configuring RIP, page 22-3
Customizing RIP, page 22-5
Monitoring RIP, page 22-12
Configuration Example for RIP, page 22-13
Feature History for RIP, page 22-13
C H A P T E R
Cisco ASA 5500 Series Configuration Guide using ASDM
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