RIP Commands:

Allowing Unicast Updates for RIP (version 1 and 2)

Router(config-router)# neighbor ip-address

This doesn't disable broadcast/multicast updates. Combine with "passive interface xxx" 

Applying Offsets to Routing Metrics

Router(config-router)# offset-list [access-list-number | access-list-name] {in | out} offset [interface-type interface-number]

Increase incoming and outgoing metrics to routes learned via RIP. Per route (acl) and/or per interface.

Specifying a RIP Version

Router(config-router)# version {1 | 2}

To control which RIP version an interface sends:

Router(config-if)# ip rip send version 1

Router(config-if)# ip rip send version 2

Router(config-if)# ip rip send version 1 2 To control how packets received from an interface are processed:

Router(config-if)# ip rip receive version 1

Router(config-if)# ip rip receive version 2

Router(config-if)# ip rip receive version 1 2

Enabling RIP Authentication

RIP Version 1 does not support authentication. A key chain must be defined first.Router(config-if)# ip rip authentication key-chain name-of-chainRouter(config-if)# ip rip authentication mode {text | md5}

RIP Route Summarization

Interface command: ip summary-address rip
 Example:ip summary-address rip 10.1.1.0 255.255.255.0The router advertises 10.1.1.0/24 route. Advertisement of smaller routes is suppressed. Automatic summary overrides configured summary address except when:

• The configured interface summary address and the IP address of the configured interface share the same major network (the classful, nonsubnetted portion of the IP address).

AND 

• Split horizon is not enabled on the interface.

Disabling the Validation of Source IP Addresses

Router validates the source IP address of incoming RIP routing updates. If that source address is not valid, the software discards the routing update. To disable this feature (router is “off network” and you want to receive its updates): Router(config-router)# no validate-update-source

Enabling or Disabling Split Horizon

Split horizon blocks information about routes from being advertised by a router out of any interface from which that information originated.For nonbroadcast networks you may want to disable split horizon with RIP.Router(config-if)# ip split-horizonRouter(config-if)# no ip split-horizon Split horizon for Frame Relay is disabled by default. For all other encapsulations, split horizon is enabled by default.

Configuring Interpacket Delay

Software adds no delay between packets in a multiple-packet RIP update being sent. If you have a high-end router sending to a low-speed router, you might want to add such interpacket delay to RIP updates.Router(config-router)# output-delay milliseconds

Connecting RIP to on demand circuits

RIP sends information only when there has been an update to the routing database. Periodic update packets are suppressed over the interface on which this feature is enabled.Router(config)# interface serial controller-numberRouter(config-if)# ip rip triggered