RIP configuration commands let you set parameters related to Routing Information Protocol (RIP).
Table 2-13. RIP Configuration Commands (1 of 3)
[no] auto-summary
Minimum Access Level: Administrator Command Mode: config-router
Use the auto-summary command to control auto-summarization.
Route summarization is used to reduce the routing information in routing tables. RIP Version 1 by definition uses automatic summarization. For RIP Version 2, auto-summary is enabled by default. However, it can be turned off by specifying the no auto-summary command. Automatic summarization should be disabled for configurations that require routing between disconnected subnets. Subnets are advertised when automatic summarization is disabled.
[no] default-information originate
Minimum Access Level: Administrator Command Mode: config-router
Use the default-information originate command to cause RIP to distribute a default route.
The default-information originate command causes the iMarc router to distribute the default route (0.0.0.0/0) if one has been previously inserted in the routing table.
Use the no default-information originate form of the command to disable the default route.
[no] ip rip receive version [1 | 2 | 1 2 | none]
Minimum Access Level: Administrator Command Mode: config-if, config-subif
Use the ip rip receive version interface configuration command to set the RIP version for received RIP updates on a specific interface. To revert to the device-level version rules, use the no ip rip receive version command.
When the router rip command is used, RIP is enabled on all interfaces carrying user data. The ip rip receive version none form of this command can be used to make RIP ignore RIP updates on the specific interface. When used in conjunction with ip rip send version none, RIP can be disabled on a specific interface.
The default is to operate according to the version command (see page 2-30).
1 – Only RIP version 1 packets will be received over the interface. 2 – Only RIP version 2 packets will be received over the interface
1 2 – Either RIP version 1 or RIP version 2 will be received over the interface. none – No RIP packets will be accepted over the interface.
[no] ip rip send version [1 | 2 | none]
Minimum Access Level: Administrator Command Mode: config-if, config-subif
Use the ip rip send version interface configuration command to set the RIP version used for sending RIP updates to a specific interface. To revert to the device-level version rules, use the no ip rip send version command.
When the router rip command is used, RIP is enabled on all interfaces carrying user data. The ip rip send version none form of this command can be used to keep RIP from sending updates to a specific interface. When used in conjunction with ip rip receive version none, RIP can be disabled on a specific interface.
The default is to operate according to the version command (see page 2-30).
1 – Only RIP version 1 packets will be sent over the interface. 2 – Only RIP version 2 packets will be sent over the interface none – No RIP packets will be sent over the interface. [no] ip split-horizon
Minimum Access Level: Administrator Command Mode: config-if, config-subif
The ip split-horizon interface configuration command is used to enable the split horizon function. Use the no ip split-horizon command to disable split horizon. Split horizon is enabled by default for both Ethernet and the network side.
[no] timers basic update invalid holddown flush
Minimum Access Level: Administrator Command Mode: config-router
Use the timers basic router configuration command to change the values of the RIP network timers. The no timers basic form of this command is used to restore the timer defaults.
update – The rate (in seconds) at which updates are transmitted. The default is 30 seconds.
invalid – The Interval of time (in seconds), after which, a route is declared invalid. It is suggested that the interval be at least three times the value of update time. Interval measurement starts when the previous update is received for the route. A route is declared invalid when no updates occur for the invalid time. The route is then marked inaccessible and advertised as unreachable. However, the route will forward packets until the flush interval expires. The default is 180 seconds.
holddown – Holddown is the Interval (in seconds) during which routing information for better paths is suppressed. A value is required to maintain compatibility with other routers, but is ignored. On iMarc routers, the actual holddown value used by RIP is 180 seconds. flush – Flush indicates the period (in seconds) that must pass before the route can be removed from the routing table. The period is measured from the last update received for the route. The flush time should be longer than the greater of the invalid and holddown values. Note: If the flush time is less than the sum of the update and holddown values, the proper holddown interval cannot end, resulting in a new route being accepted before the holddown interval expires. The default is 240 seconds.
[no] version [1 | 2]
Minimum Access Level: Administrator Command Mode: config-router
Use the version configuration command is used to set the RIP version used globally by the router.
The default value is restored by the no version form of this command. By default, RIP will send Version 1 packets but receive Version 1 or Version 2 packets. It is possible to override these values with the ip rip receive version and ip rip send
version commands.
1 – Specifies RIP Version 1
2 – Specifies RIP Version 2