From: Koen Zeilstra (koen@koenzeilstra.com)
Date: Mon May 22 2006 - 01:46:29 ART
So how would you specify routes other than selecting them manually? You
can only set a route-map inbound with distrbute list. The hub has a
multipoint sub so no interface specific filtering over there. PBR or
yanking out the routes is not an option because I would like to hold the
link as backup.
-----------------------
How come wrong numbers are never busy?
On Sun, 21 May 2006, Godswill Oletu wrote:
| Koen,
|
| There are many methods out there that, you can use to achive your stated
| objective. One of them that come to mind is to use the 'distance <ad>
| <source address>' command on R1 to increase the AD of all routes that R3 is
| sending to R1 or use it to reduce the AD of all routes that R2 is sending to
| R1; which ever way you choose, R2 routes will make it into the routing table
| of R1 and R3 routes will be floating around for redundancy.
|
| Another method is to use the distribute-list on R1 and yank out all R3
| routes; well you will also method method your stated objective with this
| method, but will loose redundancy.
|
| You can also do some policy based routing on R1, this will create a routing
| exception on R1 and allow it to forward traffic according to the policy that
| you have setup.
|
| Choose, the method that is most suitable and go for it and there might be
| other methods that I cannot think of now, these 3 or 4 methods are a good
| place to start off.
|
| HTH
| Godswill Oletu
|
| ----- Original Message -----
| From: "Koen Zeilstra" <koen@koenzeilstra.com>
| To: <ccielab@groupstudy.com>
| Sent: Sunday, May 21, 2006 8:15 AM
| Subject: prefer link in OSPF using multipoint FR interface
|
|
| > Hi group,
| >
| > Suppose you have 3 routers.
| >
| > R1 is the frame-relay hub with a multipoint sub interface. R2 and R3 are
| > spokes with a physical FR interface.
| >
| > R2 and R3 have a shared ethernet segment.
| >
| > R1-------(FR)-------|
| > | |
| > | |
| > (FR) |
| > | |
| > | |
| > R2----(ethernet)-----R3
| >
| >
| > I want to like to prefer the path for R2 to go via R3 for routes behind
| > R1 instead of directly to R1.
| >
| > I can use ip ospf cost on the physical interface of R2 to make the FR link
| > less interesting and prefer the ethernet to R3. However for traffic coming
| > from networks behind R1 this won't work. That traffic will still go trough
| > the FR link R1-R2 instead of using R1-R3-R2. I cannot set ip ospf cost on
| > an interface basis on R1 since that is a multipoint sub. Setting cost on a
| > neigbhor is also not allowed for the same reason.
| >
| > Hope this is clear.
| >
| > Anybody a solution for this?
| >
| > thanks,
| >
| > Koen
| >
| > -----------------------
| > If little else, the brain is an educational toy.
| > -- Tom Robbins
| >
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