Overview: Configuring Rip On The Ers 8600; Rip Support On The Ers8600 - Avaya 8600 Technical Configuration Manual

1. Overview: Configuring RIP on the ERS 8600

This document describes how to configure RIP and RIP Policies on the Ethernet Routing Switch 8600.
The Routing Information Protocol (RIP) is an interior gateway protocol (IGP). RIP is one of a class of
algorithms known as distance vector algorithms. The distance or hop count is used as the metric to
determine the best path to a remote network or host where the hop count does not exceed 15 hops
assuming a cost of one for each network. RIP uses broadcast User Datagram Protocol (UDP) data
packets to exchange routing information.
RIP sends routing information updates every 30 seconds. This update contains known networks and the
distances (hop count) associated with each one. For RIPv1, no mask information is exchanged; the
natural mask is always applied by the router receiving the update. For RIPv2, mask information is sent. If
information about a network is not received for 90 seconds, the metric associated with the network is
raised to infinity (U) – the metric is set for 16 which means the network becomes unreachable. If
information about a network is not received for 180 seconds (six update intervals), it is removed from the
routing table. These default timers can be changed by configuring the RIP Interface Timeout Timer
parameter and Holddown Timer parameters.

2. RIP support on the ERS8600

The Ethernet Routing Switch 8600 support fours RIP send modes that are configurable on all Router
interfaces:
1. rip1comp – Broadcast RIP-2 updates using RFC 1058 route consumption rules. This is the
default setting on the Ethernet Routing Switch 8600
o
Destination MAC is a broadcast, ff-ff-ff-ff-ff-ff
o
Destination IP is a broadcast for the network, i.e. 192.1.2.255
o
RIP Update is formed as a RIP-2 update, including network mask
o
RIP version = 2
2. rip1 – RIP updates compliant with RFC 1058
o
Destination MAC is a broadcast, ff-ff-ff-ff-ff-ff
o
Destination IP is a broadcast for the network, i.e. 192.1.2.255
o
RIP Update is formed as a RIP-1 update, no network mask included
o
RIP version = 1
3. rip2 – Multicast RIP-2 updates
o
Destination MAC is a multicast, 01-00-5e-00-00-09
o
Destination IP is the RIP-2 Multicast address, 224.0.0.9
o
RIP Update is formed as a RIP-2 update including network mask
o
RIP version = 2
4. nosend – No RIP updates are sent on the interface
November 2010
ERS 8600 / ERS 8800 RIP Technical Configuration Guide
avaya.com
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