RIP Version 1 (RIP v1)
is a classful, distance-vector protocol that is considered the easiest routing
protocol to implement. Unlike OSPF, RIP broadcasts User Datagram Protocol (UDP)
data packets to exchange routing information in internetworks that are flat
rather than hierarchical. Network complexity and network management time is
reduced. However, as a classful routing protocol, RIP v1 allows only contiguous
blocks of hosts, subnets or networks to be represented by a single route,
severely limiting its usefulness.
RIP v2 allows more
information carried in RIP update packets, such as support for:
interdomain routing (CIDR)
subnet masks (VLSMs)
and the use of redistribution
The metric that RIP
uses to rate the value of different routes is
The hop count is the number of routers that can be traversed in a
route. A directly connected network has a metric of zero; an unreachable
network has a metric of 16. This small range of metrics makes RIP an unsuitable
routing protocol for large networks.
updates are advertised every 30 seconds by default, and new updates discovered
from neighbor routers are stored in a routing table.
Only RIP Version 2
(RIP v2), as specified in RFC 2453, is supported on
Cisco IOS XR software and, by default, the software only sends and receives RIP v2
packets. However, you can configure the software to send, or receive, or both,
only Version 1 packets or only Version 2 packets or both version type packets
Here are some good
reasons to use RIP:
diverse network devices
Best for small
networks, because there is very little overhead, in terms of bandwidth used,
configuration, and management time
Support for legacy
Because of RIP’s ease
of use, it is implemented in networks worldwide.
VRF does not allow
configuration of a group applied directly under router RIP. A group can be
configured if it is applied globally or under VRF.