Avaya C360 - Manual (Page 165)

RIP (Routing Interchange Protocol) Configuration
Issue 1 July 2006 165
operating RIPv1, you must not configure variable length subnet masks (VLMS). Each IP
network must have a single mask, implying that all subnets in a given IP network are of the
same size. Also, when operating RIPv1, you must not configure supernets, which are networks
with a mask smaller than the natural net mask of the address class, such as 192.1.0.0 with
mask 255.255.0.0 (smaller than the natural class C mask which is 255.255.255.0). For detailed
descriptions of RIP refer to the standards and published literature.
RIPv2 is a new version of the RIP routing protocol but with some advantages over RIPv1. RIPv2
solves some of the problems associated with RIPv1. The most important change in RIPv2 is the
addition of a subnet mask field which allows RIPv2 to support variable length subnets. RIPv2
also includes an authentication mechanism similar to the one used in OSPF.
The RIP version, 1 or 2, is configured per IP interface. Configuration must be homogenous on
all routers on each subnet-there can not be both RIPv1 and RIPv2 routers configured on the
same subnet. However, different IP interfaces of the C360 can be configured with different RIP
versions (as long as all routers on the subnet are configured to the same version).
RIPv2 and RIPv1 are considered the same protocol with regard to redistribution to/from OSPF
and static route preferences.
RIP2
RIP2 overcomes some of the shortcomings of RIP. The table below summarizes the differences
between RIP and RIP2.
Table 34: DIfferences Between RIP and RIP2
RIP2 RIP
Multicast addressing Broadcast Addressing
Event-driven Timer-based (update every 30 seconds)
VLSM support (subnet information transmitted) Fixed subnet masks