Cisco 350 Series Administration Manual page 435

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Router rA does not support RIP. Therefore, routing entries with an appropriate metric are
configured statically on this router. While on router rB the route to router rA is considered a
connected route. In contrast, routers rB and rC derive and distribute their routing entries using
RIP.
The connected route configuration of router rB, can be propagated to router rC using either the
default metric or transparent system. A static/connected route is redistributed either with the
route's metric (transparent metric) or with the metric defined by the default-metric command.
See Redistribution Feature
RIP Authentication
You can disable authentication of RIP messages per IP interface or enable one of the following
types of authentication:
• Plain text or password—Uses a key password (string) that is sent along with the route
to another router. The receiving router compares this key to its own configured key. If
they are the same, it accepts the route.
• MD5—Uses MD5 digest authentication. Each router is configured with a set of secret
keys. This set is called a key chain. Each key chain consists of one or more keys. Each
key has an identifying number (key identifier), key string and optionally, a send-
lifetime and accept-lifetime value. The send-lifetime is the time period during which
an authentication key on a key chain is valid to be sent; the accept-lifetime is the time
period during which the authentication key on a key chain is received as valid.
Each transmitted RIP message contains the calculated MD5 digest of the message
(containing the key chain), plus the key identifier of the used key string. The receiver
also has the key chain configured on it. The key identifier is used by the receiver to
select the key for validating the MD5 digest.
RIP Statistical Counters
You can monitor the RIP operation by checking statistical counters per IP interface. See
Statistic for a description of these counters.
RIP Peers Database
You can monitor the RIP peers database per IP interface. See
description of these counters
for more information.
Cisco 350, 350X and 550X Series Managed Switches, Firmware Release 2.4, ver 0.4
IP Configuration: RIPv2
How Rip Operates on the Device
RIPv2 Peers Database for a
RIPv2