From: Reza Toghraee (reza@toghraee.com)
Date: Sat Oct 18 2008 - 10:09:08 ART
You cannot filter intra area LSAs.
R2 creates the LSA for your summary network and advertises into AREA 10.
There is no way to customize the LSA advertisement inside an area.
You can only filter on R1's routing table to prevent this summary to be
installed in routing table.
R2 as ABR between AREA0, AREA10 can do LSA type 3 filtering for the WHOLE
AREA10.
Reza
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
stephen skinner
Sent: Saturday, October 18, 2008 3:43 PM
To: Cisco certification
Subject: OSPF Summerisation seen on one spoke but not another
hello,
could anyone shed some light on this please.
i have the following topology
R1 R3
- -
- -
--
R2 -----------R4
hub and spoke topology for R1 , R2, R3 all using physicall interfaces.
Ethernet topology fot R2-R4
R1,R2,R3 area in area 10 ( OSPF point-to-Multipoint interfaces)
R2 and R4 are in area 0 ( OSPF Broadcast interfaces)
R4 area 0 is sending the following networks
10.10.10.0/24
10.10.11.0/24
10.10.12.0/24
and i have created a summary on R2 using a /22 network to send to area 11.
is there any way to send this summary to just R3 instead of R1 ???
i know i can filter it out on R1, but i wanted to try and stop it leaving R2
bound for R1
i have been trying differnet things, Area filter , outbound distribute list
,
but nothing seems to work ,
does anyone have any idea.
TIA
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