Cisco 350XG series Administration Manual page 383

IP Configuration: RIPv2
How Rip Operates on the Device
Cisco 350XG & 550XG Series 10G Stackable Managed Switches
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 Displaying RIPv2 Statistic Counters
for more information.
for a description of these counters.
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