Cisco 6500 - Catalyst Series 10 Gigabit EN Interface Module Expansion, Configuration Manual, Page: 163 / 742

8-21
Catalyst 6500 Series Switch and Cisco 7600 Series Router Firewall Services Module Configuration Guide using ASDM
OL-20748-01
Chapter 8 Configuring IP Routing and DHCP Services
Configuring RIP
Restarting the OSPF Process
To restart an OSPF process, clear redistribution, or counters, enter the following command:
hostname(config)# clear ospf pid { process | redistribution | counters
[ neighbor [ neighbor-interface ] [ neighbor-id ]]}
Configuring RIP
This section describes how to configure RIP. This section includes the following topics:
• RIP Overview, page 8-21
•
Enabling RIP, page 8-21
RIP Overview
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 initially.
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. Additionally, RIP cannot be enabled on a global
basis.
FWSM uses a limited version of RIP; it does not send out RIP updates that identify the networks that
FWSM can reach. However, you can enable one or both of the following methods:
•
Passive RIP—FWSM listens for RIP updates but does not send any updates about its networks out
of the interface.
Passive RIP allows FWSM to learn about networks to which it is not directly connected.
•
Default Route Updates—Instead of sending normal RIP updates that describe all the networks
reachable through FWSM, FWSM sends a default route to participating devices that identifies
FWSM as the default gateway.
You can use the default route option with passive RIP, or alone. You might use the default route
option alone if you use static routes on FWSM, but do not want to configure static routes on
downstream routers. Typically, you would not enable the default route option on the outside
interface, because FWSM is not typically the default gateway for the upstream router.
Enabling RIP
To enable RIP on an interface, enter the following command:
hostname(config)# rip if_name { default | passive } [ version { 1 | 2
[ authentication { text | md5 } key key_id ]}]
You can enable both the passive and default modes of RIP on an interface by entering the rip command
twice, one time for each method. For example, enter the following commands:
hostname(config)# rip inside default version 2 authentication md5 scorpius 1