From: Mark Lewis (markl11@xxxxxxxxxxx)
Date: Mon Sep 25 2000 - 16:29:11 GMT-3
Hi,
Well, there are a couple of ways to do it.
The problem on partially meshed fr network (eg.hub & spoke) is that the
default mechanism for mapping layer 3 addresses to layer 2 (dlcis) is only
good for point to point reachability (one end of pvc to other). I'm talking
about inv-arp of course.
So, solutions:
1.frame-relay maps (trad.solution). In, for example, a hub and spoke
scenario you would need maps from the spoke sites to the other spoke sites
(assuming a hub with a multipoint int.). The hub router doesn't need maps
because it's directly connected to the spoke sites.
2.make all the int.s point-to-point (even at the hub).Different subnets on
each point-to-point, of course.
3.route-maps. Force packets out of int. even if no map (either static or
dynamic)exists to the next-hop.
By the way,you still need this even if you are using OSPF. Try setting it up
with a hub & two spokes. You'll find that even though you get all the routes
(assuming otherwise good set up), you won't be able to ping all
destinations. Why not? Reachability to next hop (do the ping with debug ip
packet & watch for 'encapsulation failed' messages (indicates lack of map)).
Hope this helps,
Mark
>From: "Tony Olzak" <aolzak@buckeye-express.com>
>Reply-To: "Tony Olzak" <aolzak@buckeye-express.com>
>To: <ccielab@groupstudy.com>
>Subject: Frame-relay multipoint
>Date: Mon, 25 Sep 2000 14:49:51 -0400
>
>Guys,
>
>Without running a routing protocol like OSPF, how do you get two routers to
>ping each other over the frame cloud when they do not have a direct PVC to
>each other. For example, R1 has a pvc to R2 and one to R3. They are all on
>the same network but R2 has to go through R1 to ping R3. How can you
>accomplish this before a routing protocol is used? I'm guessing using
>policy-basd routing with a route map that sets the next hop?
>
>Also, how can you enable a router to ping itself on a frame connection?
>
>Thanks,
>
>Tony
>
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