Administration of the Avaya G350 Media Gateway - Avaya Support

Configuring RIPRIPv1RIPv2The very simplicity of RIP has a disadvantage however. This protocol does not take into accountnetwork bandwidth, physical cost, and data priority. The Avaya G350 Media Gateway supportstwo versions of RIP:●●RIPv1RIPv2RIPv1 is the original version of the RIP protocol. The RIPv1 protocol imposes some limitationson the network design with regard to subnetting. When operating RIPv1, you must not configurevariable length subnetwork masks (VLMS). Each IP network must have a single mask, implyingthat all subnetworks in a given IP network are of the same size. Also, when operating RIPv1,you must not configure supernets. RIPv1 is defined in RFC 1058.RIPv2 is a newer version of the RIP routing protocol. RIPv2 solves some of the problemsassociated with RIPv1. The most important change in RIPv2 is the addition of a subnetworkmask field which allows RIPv2 to support variable length subnetworks. RIPv2 also includes anauthentication mechanism similar to the one used in OSPF. RIPv2 is defined in RFC 2453.Table 9: RIPv1 vs. RIPv2 on page 191 summarizes the differences between RIP and RIP2.Table 9: RIPv1 vs. RIPv2RIPv1Broadcast addressingTimer-based – updated every 30 secondsFixed subnetwork masksNo securityNo provision for external protocolsRIPv2Multicast addressingTimer-based – updated every 30 secondsVLSM support – subnet information transmittedSecurity (authentication)Provision for EGP/BGP (Route tag)Preventing routing loops in RIPYou can use the following features in RIP to help avoid routing loops:●Split-horizon● Poison-reverseThe split-horizon technique prevents information about routes from exiting the router interfacethrough which the information was received. This prevents small routing loops. Use theip rip split-horizon command to enable the split-horizon mechanism. Use the no formof this command to disable the split-horizon mechanism. By default, split-horizon is enabled.Issue 3 January 2005 191