Let me guess, on Cisco Router A you got an ARP entry for Cisco Router B's address when you put a Cisco router in the middle, as the Cisco router has proxy-arp enabled by default.
Or to put it more clearly the IP addresses used FR p2p pvc is a subset of the IP addresses used on the link between Cisco Router A and Juniper Router. Or on Cisco router A you have a static route without a next-hop address to the IP subnet used on the FR link In either case it's a mis configuration, that gets 'saved'/'hidden' by the fact proxy-arp is enabled by default on the Cisco router. /Jesper On Thu, Jul 17, 2008 at 04:06:31PM +0500, Farhan Jaffer wrote: > Hi, > > There is an interesting situation, let me discuss the scenario first, > > Cisco Router A ----(same n/w) ---- Juniper Router -----(FR > point-to-point pvc) ------- Cisco Router B. > > PVC is Active & point to point connectivity is OK. But the ping > response from cisco router A to B via FR is unreachable & vice versa. > > however if i replace Juniper router with Cisco Router, it works fine. > > Is there any IP forwarding like thing? or any other problem. > > Thanks very much in advance. > > -FJ > _______________________________________________ > juniper-nsp mailing list juniper-nsp@puck.nether.net > https://puck.nether.net/mailman/listinfo/juniper-nsp /Jesper -- Jesper Skriver, jesper(at)skriver(dot)dk - CCIE #5456 One Unix to rule them all, One Resolver to find them, One IP to bring them all and in the zone to bind them. _______________________________________________ juniper-nsp mailing list juniper-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/juniper-nsp
