Yes, I looked into router-maps for the policy routing bit and I'm just
reading more about using them for redistribution.......
Two different OSPF process - sounds interesting.......... will take that
idea to the lab now.
thanks
Kevin Wigle
----- Original Message -----
From: "Curtis Call" <[EMAIL PROTECTED]>
To: "Kevin Wigle" <[EMAIL PROTECTED]>
Cc: <[EMAIL PROTECTED]>
Sent: Friday, March 23, 2001 10:54 AM
Subject: Re: Route filtering - somewhat long
> You might want to look into using a route map to specify to only allow
each
> network into one particular area. If you can't get that to work then you
> could try using different ospf processes on the router one for 1015 and
one
> for 1020, and once again use a route-map to specify which networks to
> allow. That way area 1015 will only have an LSA 5 for 142.226.20.0 and
> area 1020 will only have an
> LSA 5 for 142.226.10.0
>
>
>
> At 08:25 AM 3/23/01, you wrote:
> >Dear Group,
> >
> >I have an interesting scenario I'm trying to mock up in the lab and
getting
> >nowhere fast.
> >
> >I'm not good at ascii art so I'll try to describe the setup.
> >
> >Imagine a core network with 4 routers, put them in a square, from the top
> >left clockwise, routerA, routerB, routerC, routerD.
> >
> >These routers are connected in a full mesh and OSPF is configured.
> >
> >Each router of course is in Area 0 but each router also has another area.
> >
> >routerA - 1005
> >routerB - 1010
> >routerC - 1015
> >routerD - 1020
> >
> >There is a fifth router at the bottom - routerE, connecting to routerC
and
> >routerD with equal cost circuits using point-to-point addresses.
> >
> >These transit routes are configured into OSPF, each network into the same
> >area as the core router where it terminates.
> >
> >On a third ( Ethernet ) interface on routerE there are two networks, one
as
> >primary and one as secondary. Let's use: primary 142.226.10.0 and
secondary:
> >142.226.20.0
> >
> >Policy routing has been configured to allow the prime network out the
> >routerE-routerD circuit and the secondary network has been configured to
go
> >out the routerE-routerC circuit.
> >
> >EIGRP has been configured for the networks on the inside of routerE and
is
> >redistributed into OSPF with no auto-summary.
> >
> >Now, when on either routerA or routerB, the inside routes are in the
routing
> >table as available through both routers.
> >
> >Objective.
> >
> >Have 142.226.10.0 only advertised out routerE-routerD
> >
> >and 142.226.20.0 only advertised out routerE-routerC
> >
> >Discussion.
> >
> >I have been reading madly about distribute lists and route-maps. It all
> >reads so simply but I think this particular situation is interesting
because
> >of the two networks on one interface.
> >
> >OSPF cannot use a distribute list and use the interface command (would
have
> >been perfect).
> >
> >OSPF cannot filter incoming updates (which would have been great on
routerC
> >and routerD).
> >
> >On the face of it this "seems" so simple - but - I'm stuck.
> >
> >Any ideas welcome.
> >
> >tia
> >
> >Kevin Wigle
> >
> >Using access-lists on the egress ports don't seem to do it either.
> >
> >
> >
> >_________________________________
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