>>>> 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=72434&t=72211 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
