Version 6.8 53 Mediant MSBR
Configuration Guide 11. Dynamic IP Routing
11 Dynamic IP Routing
While the concept of data IP routing deals with getting data from point A to point B over the
network, it is important to note that there are two distinct methods for doing this:
Static routing: specifically and manually pointing the router as to through which next-
hop to route to which destination.
Dynamic routing: configuring a dynamic routing protocol on all the routers in the
network, enabling them to become aware of each other and the different subnets in
the network and dynamically learn the best route to each destination.
The advantages of dynamic routing are clear – it is automated, adaptive, makes routers
network-aware and provides even redundant routing paths.
This chapter elaborates on the different dynamic routing protocols that are supported by
the MSBR.
11.1 RIP Routing Protocol
Routing Information Protocol (RIP) is a dynamic routing protocol from the Distance Vector
family which uses hop-count as a routing metric. The protocol is limited to 15 hops per
route, which prevents loops; however also limits the network size and scalability.
Low metric routes are considered “better” and a route with hop count (metric) of 16 is
considered “unreachable”.
RIP is considered a “chatty” and bandwidth consuming protocol due to the fact it “floods” its
routing database once in a period (default is 30 seconds).
RIP can work both in broadcast and unicast modes (without or with peers, respectively).
The MSBR supports both RIP versions, RIPv1 (RFC 1058) and RIPv2 (RFC 2453).
11.1.1 Configuring RIP
Command Description
Enters the data configuration menu.
(config-data)# router rip
Enters the RIP configuration mode.
default-information
originate
Configures whether to advertise the default
route.
(conf-router)# default-metric
Configures the metric for redistributed routes.
Configures the AD for the protocol.
(conf-router)# distribute-list
prefix list-name <in/out>
interface
Configures filtering of incoming/outgoing routing
updates.
(conf-router)# neighbor IPaddress
password Password
Configures a neighbor with secured session
password.
Configures a neighbor router.
Configures a network or interface upon which to
enable RIP routing.
(conf-router)# passive-interface
interface
Configures suppression of routing updates on an
interface.
(conf-router)# redistribute
Configures redistribution of routes from other