Routing Information Protocol (Rip); Basic Rip Parameters - 3Com corebuilder 3500 Implementation Manual

296 C 11: I
HAPTER NTERNET
Routing
Information
Protocol (RIP)

Basic RIP Parameters

P (IP)
ROTOCOL
RIP is the protocol that implements routing. RIP does this by using
Distance Vector Algorithms (DVAs) to calculate the route with the fewest
number of hops to the destination of a route request. Each device keeps
its own set of routes in its routing table. RIP is an Interior Gateway
Protocol (IGP) for TCP/IP networks.
RIP operates using both active and passive devices.
Active devices, usually routers, broadcast RIP messages to all devices in
a network or subnet and update their internal routing tables when
they receive a RIP message.
Passive devices, usually hosts, listen for RIP messages and update their
internal routing tables, but do not send RIP messages.
An active router sends a broadcast RIP message every 30 seconds. This
message contains the IP address and a metric (distance) from the router
to each destination in the routing table. In RIP, each router through which
a packet must travel to reach a destination counts as one network hop.
RIP has several parameters to consider when you set up RIP to use in your
network. When you configure an IP interface, the system already has the
RIP parameters set to the defaults listed in Table 40.
Table 40 RIP Parameters
RIP Parameter
RIP-1 Mode
Compatibility
Cost
Poison Reverse
Advertisement Address
Default Value
learn
disable
1
enabled
limited broadcast address
(255.255.255.255)