Does anyone else use tags when redistributing from one protocol to the next (for the Lab only)?
For instance, I'm learing routes from R4 that get redistributed from RIP into OSPF on R5. There are 2 Frame-Relay peers: R2 and R6. R2 is redistributing from OSPF to RIP, and R6 is redistributing from OSPF to EIGRP. Each redistribution is done mutually. This is IPX V3 Lab1, in case it looks familiar. R2 /\ / \ R5 R6 / || R4 R9 Summary- When redistributing on a router, say R5 (RIP to OSPF), I use a route-map on the redistribution point and set a tag. This way, I know what protocol and router it originated from. (I remove the non-essential commands here to make this as clear as possible) R5 --- router ospf 1 redistribute rip subnets route-map RtoO network 5.5.5.5 0.0.0.0 area 0 network 141.41.26.5 0.0.0.0 area 256 ! router rip version 2 redistribute ospf 1 metric 1 route-map OtoR network 141.141.0.0 no auto-summary ! route-map RtoO permit 10 set tag 5120 ! route-map OtoR permit 10 set tag 5110 ! My result is this; I can see that it was redistributed on R5, and was originally RIP. Even if this was 6 routers and 4 protocols later, I could trace them out to eventually see that it was R5 and RIP. Reverse Engineering the routes on R9, the route shows in EIGRP as coming from R6 (redist via OSPF), then from R5 (redist via RIP), and originating from R4 (RIP). R9#sh ip route 172.20.42.2 Routing entry for 172.20.42.2/32 Known via "eigrp 679", distance 170, metric 2560512256 Tag 6110, type external Redistributing via eigrp 679 Last update from 141.41.69.6 on Serial0/0/0, 00:18:47 ago Routing Descriptor Blocks: * 141.41.69.6, from 141.41.69.6, 00:18:47 ago, via Serial0/0/0 Route metric is 2560512256, traffic share count is 1 Total delay is 20010 microseconds, minimum bandwidth is 1 Kbit Reliability 1/255, minimum MTU 1 bytes Loading 1/255, Hops 1 Route tag 6110 R6#sh ip route 172.20.42.2 Routing entry for 172.20.42.2/32 Known via "ospf 1", distance 110, metric 20 Tag 5120, type extern 2, forward metric 65 Redistributing via eigrp 679 Advertised by eigrp 679 metric 1 1 1 1 1 route-map OtoE Last update from 141.41.26.5 on Serial0/0/0, 00:22:24 ago Routing Descriptor Blocks: * 141.41.26.5, from 5.5.5.5, 00:22:24 ago, via Serial0/0/0 Route metric is 20, traffic share count is 1 Route tag 5120 R5(config)#do sh ip route 172.20.42.2 Routing entry for 172.20.42.2/32 Known via "rip", distance 105, metric 2 Redistributing via ospf 1, rip Advertised by ospf 1 subnets route-map RtoO Last update from 141.141.45.4 on Virtual-Access1, 00:00:12 ago Routing Descriptor Blocks: * 141.141.45.4, from 141.141.45.4, 00:00:12 ago, via Virtual-Access1 Route metric is 2, traffic share count is 1 (no tag) Regards, Jay McMickle- CCNP, CCSP, CCDP, MCSE http://mycciepursuit.wordpress.com/ Support me in the MS150 Challenge! http://main.nationalmssociety.org/site/TR/Bike/TXHBikeEvents?px=5886043&pg=personal&fr_id=17896 _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com To Unsubscribe from this list please visit the following link and follow the directions to unsubscribe. http://onlinestudylist.com/mailman/listinfo/ccie_rs
