From: Chris Lewis (chrlewiscsco@gmail.com)
Date: Tue May 09 2006 - 18:48:03 ART
I do not think this is a simple case to solve using just OSPF. THis is after
all destination based routing based iff link cost and there is no way I know
of within OSPF to associate different link costs to different destination
routes.
If redundancy was not required, route filtering would be possible as you
state. But if you want redundancy the only option I can think of is to use
PBR with the set ip default next-hop command. This will use the routing
table first, then if there is no matching routing table route it uses the
PBR next hop, so if you filter routes to send the traffic via OSPF routes
the way you want them, then have the PBR to route the other way if the
routing table information disappears, you meet all the requirements.
Chris
On 5/9/06, Tag Spivey <tagspivey@gmail.com> wrote:
>
> L10 L20
> |---------s0[rtr R]s1----------|
> | |
> | |
> s0[rtr A]e0--|---e0[rtr B]s0
> |
> |
> e0
> [rtr C]
> L30 L40
>
> Hello all,
> I know this is elementery ospf stuff but Im drawing a blank for some
> reason.
> Im struggling with the proper way to handle this scenario.
>
> Router R has loopbacks 10 (10.10.10.1/24) and 20 (20.20.20.1/24)
>
> Router R has equal links to A and B.
>
> Routers A and B exist on a common lan with router C
>
> Router C has loopbacks 30 (30.30.30.1/24) and 40 (40.40.40.1/24)
>
>
> When net 30 wants to talk to net 10 I always want it to take the path
> through A and viceversa when 10 wants to talk to 30
>
> By the same token when 40 wants 20 or 20 wants 40 I always want to
> take the path through B
>
> no statics of course ;)
>
> Ive tried multi areas with distribution lists and route filters etc
> but im having trouble getting it to work and still have the links R-A
> and R-B pass all traffic should one or the other fail.
>
> If anyone could throw me a bone Id sure appreciate it!!!!!!
>
> Best Regards,
> Tag
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
This archive was generated by hypermail 2.1.4 : Thu Jun 01 2006 - 06:33:21 ART