Frank, This is a function of CEF, which actually performs the forwarding. Look at the CEF entries for the next hop and you will see adjacencies for each interface. Turn off CEF and then test some more :)
On Thu, Apr 8, 2010 at 12:43 PM, Frank <[email protected]> wrote: > > All, > > I'm still struggling with some of the frame-relay concept. In the DSG two > multipoint sub-interfaces are used with the same IP subnet: > > interface Serial2/0.25 multipoint > ip address 150.100.100.2 255.255.255.0 > ip rip authentication mode md5 > ip rip authentication key-chain R2R5 > frame-relay map ip 150.100.100.5 205 broadcast > ! > interface Serial2/0.26 multipoint > ip address 150.100.100.2 255.255.255.0 > ip rip authentication mode md5 > ip rip authentication key-chain R2R6 > frame-relay map ip 150.100.100.6 206 broadcast > > > But, when we look at the routing table: > > R2#sh ip route 150.100.100.5 > Routing entry for 150.100.100.0/24 > Known via "connected", distance 0, metric 0 (connected, via interface) > Redistributing via rip > Advertised by rip > Routing Descriptor Blocks: > * directly connected, via Serial2/0.26 > Route metric is 0, traffic share count is 1 > directly connected, via Serial2/0.25 > Route metric is 0, traffic share count is 1 > > R2#sh ip route 150.100.100.6 > Routing entry for 150.100.100.0/24 > Known via "connected", distance 0, metric 0 (connected, via interface) > Redistributing via rip > Advertised by rip > Routing Descriptor Blocks: > * directly connected, via Serial2/0.26 > Route metric is 0, traffic share count is 1 > directly connected, via Serial2/0.25 > Route metric is 0, traffic share count is 1 > > two identical routes exist towards a next hop. > > The thing that I still can't grasp is the relation between the IP routing > table and the frame-relay map. > From the routing table point of view there are two identical paths towards > the next hop, yet always the correct path seems to be picked. How? > > Regards, > > Frank > > > > > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > > -- Bryan Bartik CCIE #23707 (R&S, SP), CCNP Sr. Support Engineer - IPexpert, Inc. URL: http://www.IPexpert.com
_______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com
