From: Brian Hescock (bhescock@xxxxxxxxx)
Date: Sun Oct 28 2001 - 21:36:18 GMT-3
David and I have been discussing it off-line and we haven't found a way
to do it in earlier code (i.e no wildcard bits for eigrp).
Passive-interface won't work, it prevents advertisement of updates out
that interface but you still have that network added to eigrp topology
table and would advertise it out any other eigrp interfaces that you
didn't put passive-int on. Configuring "network 10.0.0.0" under router
eigrp turns on eigrp on all interfaces with 10.x.x.x and places it in
the eigrp topology table. It would then be known as an internal eigrp
route, admin distance 90. The ospf route would be redistributed and
would be an external eigrp route, admin distance 170. So somehow you
would have to make the route learned via ospf a lower admin distance or
an equal admin distance and tweak the metrics when it's redistributed.
Perhaps there's a hack to do it I hadn't thought of but I looked at all
available commands in a route-map and haven't come across anything.
Note: the ospf route isn't learned via ospf, it's a directly
connected network on the router.
Brian
routerjocky wrote:
>just off the top of my head, passive interfaces in conjunction with no
>auto-summary on eigrp should probably work, because of the way passive
>interface works with eigrp (turns off the routing protocol on those
>interfaces)
>
>-e-
>
>----- Original Message -----
>From: "David Knot" <david_knot@yahoo.com>
>To: "Brian Hescock" <bhescock@cisco.com>
>Cc: <ccielab@groupstudy.com>
>Sent: Sunday, October 28, 2001 3:09 PM
>Subject: Re: OSPF <-> EIGRP Redistribution
>
>
>>Brian
>>
>>Agree that passive-interface won't work!
>>
>>I've tried distance command on Router A but since the
>>route is directly connected one, it doesn't sort it
>>out.
>>
>>Thanks
>>
>>--- Brian Hescock <bhescock@cisco.com> wrote:
>>
>>>David,
>>> The response someone gave you with
>>>passive-interface won't work but
>>>what should work (if you have older code) is use the
>>>"distance" command
>>>to set the admin distance higher so the ospf route
>>>is preferred.
>>> You''ll still have the route in the eigrp topology
>>>table but it won't
>>>be in the routing table.
>>>
>>>Brian
>>>
>>>David Knot wrote:
>>>
>>>>Hi guys
>>>>
>>>>Can someone help with this OSPF <-> EIGRP
>>>>redistribution lab exercise.
>>>>
>>>>Router B has 2 serial 0, serial 1 & Ethernet 0
>>>>interfaces. The serials are running OSPF on them &
>>>>they lead to OSPF IP cloud. The e0 is running EIGRP
>>>>
>>>on
>>>
>>>>it & they leads to EIGRP IP cloud. All IP subnet
>>>>addresses have prefix of 180.99.X.X.
>>>>
>>>>The problem is when EIGRP is configured it grapes
>>>>
>>>all
>>>
>>>>180.99.X.X interfaces (including the s0 & s1 IP
>>>>subnets) & sends them out. The requirement is to
>>>>
>>>have
>>>
>>>>OSPF on 2 serials ONLY (this is easy since OSPF
>>>>network command is granular) & EIGRP is to run on
>>>>
>>>e0
>>>
>>>>ONLY (this is where I need help since EIGRP network
>>>>command is NOT granular). I tried a distribute list
>>>>(distribute-list 99 out e0 with ACL denying the 2
>>>>serial subnets). But this stops OSPF to EIGRP
>>>>redistribution of these 2 subnets.
>>>>
>>>>Help please!
>>>>
>>>>
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