From: EA Louie (elouie@xxxxxxxxx)
Date: Fri Dec 14 2001 - 04:57:00 GMT-3
> > Steve Feldberg gave us an elegant solution using 'area range' and the
only
> > catch was the introduction of an additional area (making the ASBR an ABR
as
> > well). The summary-address command works okay in 12.0, but not in 12.1,
and
> > apparently, not in 12.2 either.
> >
> > here's the link
> > http://www.groupstudy.com/archives/ccielab/200112/msg00148.html (watch
the
> > URL wrap)
>
> But, this adds route to the null0, it is more often dissalowed 8-(
>
Says who? are you making that up? to GET a summary into the routing table
a null0 route *has* to be added. What's the crime as long as there is no
associated STATIC route in the *configuration*? Are you confusing summary
null0 routes ADDED to the RT with static null0 routes that you configure to
do the same thing? Remember too, the most specific route will be used
first, so anything routed to 130.7.235.1 thru 15 will be sent to s1/0.235,
and anything from 16 thru 255 will be dropped into the null0 bit bucket.
> r1(config-router)#area 0 range 130.7.235.0 255.255.255.0
> RT: add 130.7.235.0/24 via 0.0.0.0, ospf metric
that command is fine to add a null0 route. This one isn't:
ip route 130.7.235.0 255.255.255.0 null0 (besides, this one won't propagate
into OSPF unless redist static is used)
> sh ip ro:
>
> 130.7.235.0/24 is a summary, 00:00:57, Null0
> 130.7.235.0/28 is directly connected, Serial1/0.235
>
>
>
> > > Ok, before I start I have searched the archives and found 2 solutions,
one
> > > works in my lab and one does not. Here is the setup, one router
running
> > > OSPF and IGRP, it is an ASBR. One router running IGRP only. One of
the
> > > interfaces on the ASBR is in 147.1.76.0/22, the interface connected to
the
> > > IGRP router is in 147.1.5.0/24. Now I know that because they are part
of
> > > the same classful network and the subnets are not the same the OSPF
router
> > > will not advertise the 147.1.76.0/22 network. I found 2 solutions to
> > this,
> > > a "summary-address 147.1.77.0 255.255.255.0" in the OSPF config which
does
> > > not seem to work for me, and the other solution is a route map on the
IGRP
> > > only router specifying the next hop address for the networks that I am
> > > trying to reach. While the route map works, it does not put the
routes in
> > > the routing table on the IGRP router. I have heard that on some IOS
> > > versions the summary address command does not work for redistribution,
I
> > am
> > > running 12.2(1b) on both routers. Sorry to open this can of worms
again,
> > > any help is, as always, appreciated.
>
> --
> awo
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 10:32:43 GMT-3