Introduction To Rip Configuration Tasks - 3Com 7757 Configuration Manual

290 C 33: RIP C
HAPTER
RIP Startup and
Operation
Introduction to RIP
Configuration Tasks
ONFIGURATION
Garbage-collection timer: An unreachable route will be completely deleted
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from the routing table if no update packet for the route is received from the
neighbor before this timer times out.
The whole process of RIP startup and operation is as follows:
Once RIP is enabled on a router, the router broadcasts or multicasts a request
■
packet to its neighbors. Upon receiving the packet, each neighbor running RIP
answers a response packet containing its routing table information.
When this router receives a response packet, it modifies its local routing table
■
and sends an update triggering packet to the neighbor. Upon receiving the
update triggering packet, the neighbor sends the packet to all its neighbors.
After a series of update triggering processes, each router can get and keep the
updated routing information.
By default, RIP sends its routing table to its neighbors every 30 seconds. Upon
■
receiving the packets, the neighbors maintain their own routing tables and
select optimal routes, and then advertise update information to their respective
neighbors so as to make the updated routes known globally. Furthermore, RIP
uses the timeout mechanism to handle the timeout routes so as to ensure
real-time and valid routes.
RIP is commonly used by most IP router suppliers. It can be used in most campus
networks and the regional networks that are simple and less dispersive. For larger
and more complicated networks, RIP is not recommended.
Table 213 RIP configuration tasks
Configuration Task
Configuring Basic RIP
Functions
Description
Enabling RIP globally Required
and on the interface of
a specified network
segment
Setting the RIP Optional
operating status on an
interface
Specifying the RIP Optional
version on an interface
Related section
"Enabling RIP
globally and on the
interface of a
specified network
segment" on page
292
"Setting the RIP
operating status on
an interface" on
page 292
"Specifying the RIP
version on an
interface" on page
292