From: Fred Ingham (fningham@xxxxxxxxxxxxxxxx)
Date: Wed Mar 01 2000 - 07:14:52 GMT-3
Chen: OSPF summarization is only between areas. R2 will not see the
summarized route and thus does not redistribute it to IGRP. You can do
the redistribution by not including 120.1.2.1/28 in area 0, redistribute
connected under ospf, and use the summary-address command to summarize
to a /24.
You can also define a secondary address on the IGRP serial to be a /28,
turn
off ip split-horizon on r2 only and this will also distribute the /28 to
IGRP.
With split-horizon turned off you need to filter updates into r1 with a
distribute list to avoid /28 entries for r1 connected interfaces. (I
used a prefix-list). The r3 loopback will also appear as a /28.
HTH, Fred
Chun-Yu Chen wrote:
>
> > Dear all,
> >
> > I have a problem about route redistribute.
> > The figure as following,
> >
> > IGRP OSPF-Area0
> > ------R1----------R2-----------R3------
> > R1---R2 Serial 0---IGRP 120.1.21.0/24
> > R2---R3 Ethernet0--OSPF--Area0 120.1.22.0/24
> >
> > R1 loopback0 ip address is 120.1.1.1/24--IGRP
> > R2 loopback0 ip address is 120.1.2.1/28--OSPF Area0
> > R3 loopback0 ip address is 120.1.3.1/24--OSPF Area1
> >
> > The Problem is /28 subnet bits can't redistribute to IGRP,
> > I need use summarization in the R2 and R3.
> > I have use "area 1 range 120.1.3.0 255.255.255.0" in the R3 and "area 0
> > 120.1.2.0 255.255.255.0" in the R2.
> > The R2 Can't summary the 120.1.2.0/24, R3 can sent the summary route to R2
> and
> > redistribute to IGRP.
> >
> > Could you tell me why?
> > **Please read:http://www.groupstudy.com/list/posting.html
> **Please read:http://www.groupstudy.com/list/posting.html
**Please read:http://www.groupstudy.com/list/posting.html
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