From: GOLBERY Irčne (irene.golbery@xxxxxxxx)
Date: Mon May 20 2002 - 04:51:34 GMT-3
Hi Mateo,
Thanks for your answer , TCP/IP routing p 224 is an intersting example.
RIP RFC 1058 helps me too.
Irene.
-----Message d'origine-----
De : donny.mateo@sg.ca-indosuez.com
[mailto:donny.mateo@sg.ca-indosuez.com]
Envoyi : lundi 20 mai 2002 05:10
@ : GOLBERY Irhne
Objet : Re: RIP V1 sending update
Hi Irene,
there is a good case study on Doyle but I will try to explain to you.
The host address update is not sent. I think it's received. When one router
adversing a route to the other router where in both router different subnet
mask
is used on their common link. If the receiving router has a shorter subnet
mask
then the sending router, there is a possibility that the sending router
would
send a route which has an address host bit set to 1 when the receiving
router
applied the shorter subnet mask configured on it's receiving interface.
Take this as an example on Doyle page Routing TCP/IP vol 1 page 224.
The network 172.16.26.5/23 is received by RTR B as 172.16.26.0/32 because
when
RTR B put the router to the routing table, it uses the subnet mask on the
interface where it received the route from which in this case has a subnet
mask
of /22. and it just happends that 26 has a "1" on the host part of the
address.
172.16.00010110, and so it's is considred to be a host adress rather then a
subnet in the point of view of RTR B.
hope that explain, and if I'm wrong pls someone correct me.
Donny
GOLBERY Irhne <irene.golbery@arche.fr>@groupstudy.com on 19-05-2002 23:25:40
Please respond to GOLBERY Irhne <irene.golbery@arche.fr>
Sent by: nobody@groupstudy.com
To: ccielab@groupstudy.com
cc:
Subject: RIP V1 sending update
Hi all,
Need some help to understand in which condition RIP V1 send in it's update
host address ?
Thanks,
Irene.
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