SMC Networks SMC6724L3 manual 176, Configuring General Protocol Settings

CONFIGURING THE SWITCH

•There are several serious problems with RIP that you should consider. First of all, RIP (version 1) has no knowledge of subnets, both RIP versions can take a long time to converge on a new route after the failure of a link or router during which time routing loops may occur, and its small hop count limitation of 15 restricts its use to smaller networks. Moreover, RIP (version 1) wastes valuable network bandwidth by propagating routing information via broadcasts; it also considers too few network variables to make the best routing decision.

Configuring General Protocol Settings

RIP is used to specify how routers exchange routing information. When RIP is enabled on this router, it sends RIP messages to all devices in the network every 30 seconds (by default), and updates its own routing table when RIP messages are received from other routers. To communicate properly with other routers using RIP, you need to specify the RIP version used globally by the router, as well as the RIP send and receive versions used on specific interfaces (page 3-179).

Command Usage

•When you specify a Global RIP Version, any VLAN interface not previously set to a specific Receive or Send Version (page 3-179)is set to the following values:

-RIP Version 1 configures previously unset interfaces to send RIPv1 compatible protocol messages and receive either RIPv1 or RIPv2 protocol messages.

-RIP Version 2 configures previously unset interfaces to use RIPv2 for both sending and receiving protocol messages.

•The update timer is the fundamental timer used to control all basic RIP processes.

-Setting the update timer to a short interval can cause the router to spend an excessive amount of time processing updates. On the other hand, setting it to an excessively long time will make the routing protocol less sensitive to changes in the network configuration.

-The timers must be set to the same values for all routers in the network.

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