Ip Routing Protocols; Routing Information Protocol (Rip) - 3Com SuperStack 3 3250 Implementation Manual

90 C 11: IP R
HAPTER

IP Routing Protocols

Routing Information
Protocol (RIP)
OUTING
Static routes take precedence over dynamically learned routes to
the same destination.
Static routes are included in periodic RIP updates sent by your
Layer 3 Switch.
IP protocols are a set of uniquely defined interactions that allow data
communications to occur. Protocols are the rules to which networks must
adhere in order to successfully operate. Protocols that are discussed in
this section include:

Routing Information Protocol (RIP)

User Datagram Protocol (UDP) Helper
Address Resolution Protocol (ARP)
Internet Control Message Protocol (ICMP)
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 subnetwork 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.
Basic RIP Parameters
There are several parameters to consider when you set up RIP for your
network. When you configure an IP interface, the Switch already has the
RIP parameters set to the defaults listed in Table 6.