From: Brian McGahan (bmcgahan@internetworkexpert.com)
Date: Thu Mar 08 2007 - 22:44:29 ART
Yes, this is what the OSPF network types point-to-multipoint and
point-to-multipoint non-broadcast are designed to do. Even those these
hosts are on the same logical subnet R1 and R2 must physically go
through R3 to reach each other, hence the next-hop should be the
directly (not logically) connected neighbor.
HTH,
Brian McGahan, CCIE #8593 (R&S/SP)
bmcgahan@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
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-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
achievewoo@gmail.com
Sent: Thursday, March 08, 2007 7:38 PM
To: ccielab@groupstudy.com
Subject: Manipulate OSPF Routing table
Hi,everyone
There is a case. R1&R2&R3 are running ospf(area 0) in frame-realy
network.
R1--------------------------R2
|
|
|
|
|
R3
As diagram shows, R3 play roles as hub using subinterface multipoint. R1
and R2 are spokes. R1's loopback interface 0 (IP add 100.100.100.1)is
advertised in OSPF area.
R1: S0/0 1.1.123.1 lo0 100.100.100.1
R2: S0/0 1.1.123.2
R3: s0/0.123 1.1.123.3
On R2's routing table, there is one route
O 100.100.100.1/32 [110/65] via 1.1.123.1, 01:39:34, Serial0/0
From this route, R2's next hop is R1 (1.1.123.1). However, When I use
traceroute command, the traffic, actually, go through R3 firstly, then
R1.
Is it normal?
Is possible to change that route to:
O 100.100.100.1/32 [110/65] via 1.1.123.3, 01:39:34, Serial0/0
Thanks!
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