From: Adel Abushaev (adel@netmasterclass.net)
Date: Wed Dec 10 2003 - 22:53:59 GMT-3
Make 1.1.1.0 and 2.2.2.0 admin distance in OSPF higher than EIGRP external
on routers R1 and R3. Set it up to 171 in OSPF for these specific prefixes.
You may do it by creating an access-list:
access-list 10 permit 1.1.1.0
access-list 10 permit 2.2.2.0
and applying it under router OSPF:
router ospf 100
distance 171 0.0.0.0 255.255.255.255 10
Is tagging part of the requirement? You can set metric in route map based on
access-list on R1 and R3. Also, you may want not to redistribute these
prefixes back into EIGRP, because they are coming from EIGRP at the first
place.
Adel Abouchaev
CCIE# 12037, MCSE
http://www.netmasterclass.net
----- Original Message -----
From: "Peng Zheng" <zpnist@yahoo.com>
To: <ccielab@groupstudy.com>
Sent: Wednesday, December 10, 2003 8:17 PM
Subject: Redistribute issue
> Topology:
>
> |--------R2--------|
> | |
> R1 R3
> | |
> |--------R4--------|
>
> OSPF among R1, R2, R3.
> EIGRP among R1, R3, R4.
>
> There are two loopback 1.1.1.0/24,2.2.2.0/24 on R4.
>
> They are redistributed into eigrp.
>
> Mutual redistribute between OSPF and EIGRP on R1 and
> R3.
>
> Requirement:
>
> R2 preferred R2 to 1.1.1.0/24, and R3 to 2.2.2.0/24.
>
> Solution:
>
> 1) set tag 1 and 2 for 1.1.1.0/24 and 2.2.2.0/24 when
> redistributed into eigrp.
> 2) Set metric 1 for tag 1 and metric 2 for tag 2 on R1
> and Set metric 2 for tag 1 and metric 1 for tag 2 on
> R3 when redistribute from eigrp to OSPF.
>
> After I did this, R2 prefer one of R1 and R3 to get
> both 1.1.1.0/24 and 2.2.2.0/24. And Sometimes R1
> prefer OSPF for both routes, and sometimes R3 prefer
> OSPF for both routes. It's because EIGRP external has
> larger AD than OSPF.
>
> R2 only see these routes in ospf database from one of
> R1 and R3, not both of them.
>
>
> What else I need to do?
>
>
> Thanks.
>
>
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This archive was generated by hypermail 2.1.4 : Sat Jan 03 2004 - 08:25:39 GMT-3