Thanks, guys. My lab is in 2 weeks (Yes Marc, Steve, and Chris- 14 days!), So I was just making sure it wasn't frowned upon as we use them in our production network as well.
Happy labbing! Regards, Jay McMickle- CCNP,CCSP,CCDP Sent from my iPhone http://mycciepursuit.wordpress.com On Nov 29, 2011, at 3:51 PM, mark salmon <[email protected]> wrote: > Its good practice to use tags so you can control the redistribution > especially when RIP is involved but as I found out the hard way in lab 9 even > with EIGRP and OSPF its good idea to use tags and filter on tags. > > "Question with boldness even the existence of a God; because, if there be > one, he must more approve of the homage of reason, than that of blind-folded > fear." Thomas Jefferson > " Where ignorance is bliss 'tis folly to be wise" > From: Jay McMickle <[email protected]> > To: IPExpert Online <[email protected]> > Cc: Chris Moore (CCIE Vegas) <[email protected]> > Sent: Tuesday, November 29, 2011 3:29 PM > Subject: [OSL | CCIE_RS] Redistribution tagging? > > 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 > > _______________________________________________ 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
