Notes: RIP, metrics, and updates

You can manipulate metrics in RIP using offset-list.

• offset-list {access-list-number | name} { in | out} offset [type number]

access-list 1 permit 10.11.0.0 0.0.0.0
router rip
network 192.168.12.0
network 10.0.0.0
offset-list 1 in 3 Serial0

The access list above identifies a route to subnet 10.11.0.0. The offset list is read as, "Examine RIP advertisements incoming from interface S0/0/0:0. For route entries matching the addresses specified in access list 1, add 3 hops to the metric."

A way to minimize RIP updates is to use triggered updates - ip rip triggered.

Some RIP commands:

Command	Description
debug ip rip [events]	Summarizes RIP traffic to and from the router
ip address ip-address mask secondary	Configures an interface with the indicated IP address as a secondary address
ip rip triggered	Configures triggered extensions to RIP on an interface
neighbor ip-address	Establishes the link indicated by the IP address as a neighbor of the interface
network network-number	Specifies the indicated network as one that will run RIP
offset-list {access-list-number | name} {in | out} offset [type number]	Stipulates that a route entry belonging to the indicated access list will have the indicated offset number added to its metric
output-delay delay	Sets an interpacket gap of the indicated delay length to accommodate processing delays between high-speed and low-speed routers
passive-interface type number	Blocks RIP broadcasts on the interface indicated by type and number
router rip	Enables RIP
timers basic update invalid holddown flush	Manipulates the value of the indicated timer