Cisco 15327 - Manual (Page 163)

11-5
Ethernet Card Software Feature and Configuration Guide, R7.2
Chapter 11 Configuring Networking Protocols
Configuring RIP
Using RIP, the switch sends routing information updates (advertisements) every 30 seconds. If a router
does not receive an update from another router for 180 seconds or more, it marks the routes served by
that router as unusable. If there is still no update after 240 seconds, the router removes all routing table
entries for the nonupdating router.
RIP uses hop counts to rate the value of different routes. The hop count is the number of routers that can
be traversed in a route. A directly connected network has a hop count of zero; a network with a hop count
of 16 is unreachable. This small range (0 to 15) makes RIP unsuitable for large networks.
If the router has a default network path, RIP advertises a route that links the router to the pseudo network
0.0.0.0. The 0.0.0.0 network does not exist; it is treated by RIP as a network to implement the default
routing feature. The switch advertises the default network if a default was learned by RIP or if the router
has a gateway of last resort and RIP is configured with a default metric. RIP sends updates to the
interfaces in specified networks. If an interface’s network is not specified, it is not advertised in any
RIP update.
Table 11-1 shows the default RIP configuration.
To configure RIP, enable RIP routing for a network and optionally configure other parameters.
Beginning in privileged EXEC mode, follow this procedure to enable and configure RIP:
Table 11-1 Default RIP Configuration
Feature Default Setting
Auto summary Enabled
Default-information originate Disabled
Default metric Built-in; automatic metric translations
IP RIP authentication key-chain No authentication
Authentication mode: clear text
IP RIP receive version According to the version router configuration command
IP RIP send version According to the version router configuration command
IP RIP triggered According to the version router configuration command
IP split horizon Varies with media
Neighbor None defined
Network None specified
Offset list Disabled
Output delay 0 milliseconds
Timers basic Update: 30 seconds
Invalid: 180 seconds
Hold-down: 180 seconds
Flush: 240 seconds
Validate-update-source Enabled
Version Receives RIP Version 1 and Version 2 packets;
sends Version 1 packets