At 10:19 PM 7/16/2003 +0000, Priscilla Oppenheimer wrote: >To be fair, I just checked, and Doyle didn't say anthing about >redistribution. > >The example simply shows configuring > >ip route 0.0.0.0 0.0.0.0 192.168.1.82 > >The text says that the router that has that config (which is running RIP by >the way) advertises the default to other RIP routers. > >It goes on to say: > >"After a default route is identified in the routing table, RIP, EIGRP, IGRP >will automatically advertise it." > >That's right, isn't it?
I don't think so. That's what the original poster questioned and I agree with him. If it is right, then I take back everything. Well, except that about BGP, there I am 100% sure nothing happens automatically. :) > If it were OSPF you would need redistribution And a 'default-info orig' as well. Thanks, Zsombor >, but >not for those others? > >That was the original question. Sorry I confused it with the statement from >CertZone, which really meant to cover a different situation. :-) > >Thanks, > >Priscilla > >John Neiberger wrote: > > > > >>>> Zsombor Papp 7/16/03 3:42:18 PM >>> > > >>I looked at that page in Doyle's book and I thought it's just > > a simple > > >>mistake, or maybe IOS changed since he wrote that, but after > > reading > > this: > > >> > > >>>"Handling of default routes varies from protocol to > > protocol. RIP, IGRP, > > >>>EIGRP and BGP automatically redistribute default routes > > while OSPF and > > >IS-IS > > >>>require you to explicitly advertise them with the > > default-information > > >>>originate statement in your router configuration." > > >> > > >>I start to think that these folks (Doyle included) have some > > basic problem > > > > >>with simple terminology. > > > > > >Actually this terminology might not be that simple after all, > > as it is not > > > > >clear whether something was redistributed unless it is > > advertised to peers. > > > > >So revised statement below. > > > > > >Also, I just realized that my above sentence sounds less > > respectful than I > > > > >intended, so I thought I would mention that I learnt a lot > > from "Routing > > >TCP/IP" and it's probably the most useful networking book I've > > ever read. > > > > > >> There is no way "BGP automatically redistributes default > > routes". > > >> However it's true that OSPF and ISIS don't advertise the > > default route > > >> even if it's redistributed into them, unless > > 'default-information > > >> originate' is specified. > > >> > > >>So the statement should be something like "RIP, IGRP, EIGRP > > and BGP > > >>automatically advertise default routes that are redistributed > > into them, > > >>while OSPF and ISIS require the 'default-information > > originate' > > >>statement." At least I hope that this is a true statement... > > :) > > > > > >Probably this one is better: > > > > > >"RIP, IGRP, EIGRP and BGP automatically accept default routes > > that are > > >redistributed into them, while OSPF and ISIS silently reject > > the > > >redistributed default route unless 'default-information > > originate' is > > >configured." > > > > > >Thanks, > > > > > >Zsombor > > > > Actually, I think I wrote that line and it is a little > > confusing, perhaps. I > > took great care to be specific with my terminology but it's > > easy to slip > > back into bad habits from time to time. Many people use terms > > in a haphazard > > way (like redistribute, advertise, originate, export, import, > > accept) > > without fully considering the implications of using one term > > over another. > > With Howard's approval perhaps we should have CZ update that > > line with your > > edited version! I like your version better, anyway. :-) > > > > Thanks, > > John Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=72442&t=72211 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
