My understanding is that when you enable RIP, it will broadcast the route
table out all interfaces where IP is running. The network statement is used
to designate which networks are added to the route table.
Example:
E1 = 10.1.1.1 /8
E2 = 11.1.1.1 /8
E3 = 192.168.1.1 /24
Router rip
Network 10.0.0.0
Network 11.0.0.0
The route table will contain the 10.0.0.0 /8 and 11.0.0.0 /8 networks and
NOT the 192.168.1.1 /24 network. However the route table will be broadcast
out all 3 Ethernet ports. If you do not want the table broadcast out a
certain port, then you have to use the passive-interface command.
Jason Coleman - CCNP, CCDP
Customer Engineer
-----Original Message-----
From: James Haynes [mailto:[EMAIL PROTECTED]]
Sent: Friday, April 27, 2001 10:47 AM
To: [EMAIL PROTECTED]
Subject: RIP Updates [7:2270]
I'm currently having a "discussion" with a fellow employee
who passed the
CCIE Written about a year ago. Has no plans to take the lab,
but that's
neither here no there. He claims that when RIP is enabled on
a router it
floods it's updates out all interfaces on the router by
default. I was of
the impression that the updates are only broadcast out
interfaces that have
ip addresses in the same major network as the network
command when
configuring RIP.
For example:
A router with four interfaces (addresses made up)
E0 130.10.12.1
E1 130.10.13.1
S0 130.10.20.1
S1 170.23.15.1
To0 no ip address, but up for bridging.
If I configure RIP as:
router rip
network 130.10.0.0
then E0,E1,and S0 will send Rip updates out those
interfaces, but S1, and
To0 interfaces will not. Is this correct? I've been looking
through some of
my books and on CCO and from what I gather RIP broadcasts a
RIP Request
Message on each RIP-enabled interface and receives a RIP
Response message
from a neighboring RIP router that includes that routers
routing table. Are
the RIP-enabled interfaces those interfaces in the same
major network as the
network command? Would a router running RIP on the far side
of a connection
on S1 send a request if it's network was specified in that
routers RIP
process causing the local router to send an update out the
S1 interface? If
anyone knows or can point me to the appropriate place for
the information
I'd appreciate it.
--
James Haynes
Network Architect
Cendant IT
A+,MCSE,CCNA,CCDA,CCNP,CCDP
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