s on the situation. I would use them in the actual lab only if 1) I was told to 2) i have multiple redistribution points 3) its possible for the routes to leak back in (lab 9 has rip from one bb router and eigrp from the other. it has two eigrp to ospf redistribution points and the BB routers are connected to each other and exchange unfiltered routes. "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: mark salmon <[email protected]> Cc: IPExpert Online <[email protected]>; Chris Moore (CCIE Vegas) <[email protected]> Sent: Tuesday, November 29, 2011 4:56 PM Subject: Re: [OSL | CCIE_RS] Redistribution tagging? 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
