Well it seems to me that you can use different process ids to simulate areas and reditrubute as needed so that would give EIGRP an OSPF area flavor. We do this at work quiet a bit for our European customer. Raul ----- Original Message ----- From: "Scott Jensen" <[EMAIL PROTECTED]> To: "Brant Stevens" <[EMAIL PROTECTED]> Cc: "'David Cooper'" <[EMAIL PROTECTED]>; "'Howard C. Berkowitz'" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]> Sent: Friday, March 16, 2001 9:41 AM Subject: Re: OSPF > While I see what you are saying. EIGRP is still advertised as a flat routing > protocol by Cisco, while OSPF is advertised as being an "area-based hierarchical > system" with features found in that type of protocol. Scalabiliby being a very > important feature at that. > > Scott > > Brant Stevens wrote: > > > The use of IP address summarization creates FS query boundaries, and gives > > you a sense of hierarchy, but, you are correct in that there is not an > > area-based hierarchical system... > > > > -----Original Message----- > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of > > Scott Jensen > > Sent: Thursday, March 15, 2001 12:58 PM > > To: David Cooper > > Cc: Howard C. Berkowitz; [EMAIL PROTECTED] > > Subject: Re: OSPF > > > > also note in your reading that EIGRP is Flat where OSPF is hierarchical > > similar to BGP. > > > > Scott > > > > David Cooper wrote: > > > > > just what I was looking for :) > > > > > > Thanks, > > > Dave > > > > > > On Wednesday 14 March 2001 23:34, Howard C. Berkowitz wrote: > > > > >Hey all, > > > > > > > > > > I've been reading into BSCN here lately with Cisco press > > > > >books. In the book > > > > >there is a fairly detailed discussion of OSPF. I'm not in the least > > > > > opposed to learning it. One thing I would like to understand is why an > > > > > organization would use it. Is this used in ISP's? What are the > > advantages > > > > > of it over say, EIGRP? I always see it compared to RIPv1 but I find it > > > > > silly for advanced routing protocols to be compared with ripV1. > > > > > > > > I'll preface my remarks with the observation that all three advanced > > > > IGPs: OSPF, EIGRP, and ISIS, all work well. ISIS is more a niche > > > > protocol for ISPs. There are pros and cons for each one. > > > > > > > > OSPF and ISIS require structured network topology from the very > > > > beginning, while EIGRP is much more tolerant -- up to a point. For > > > > me, the definitive comment came over a few beers shared with a > > > > distinguished Cisco engineer. He observed, "to build a really big > > > > network, you absolutely have to have clue." He burped loudly, and > > > > then went on. "EIGRP has the advantage of letting you stay clueless > > > > for longer." > > > > > > > > The biggest argument against EIGRP is that it is Cisco proprietary. > > > > Being proprietary has implications beyond the multivendor question. > > > > Because some of the EIGRP mechanisms have not been published by > > > > Cisco, there isn't the external knowledge base about EIGRP that there > > > > is about OSPF and ISIS. Protocol and network architects have a very > > > > deep understanding how OSPF and ISIS will behave and what their > > > > strengths and weaknesses are, but no one who hasn't been a Cisco > > > > employee can have the same sort of insight. > > > > > > > > For similar topologies, EIGRP generally needs less processing than > > > > OSPF. On the other hand, with ever-faster processors, this may not be > > > > a significant constraint. In a fair test, with equivalent timers set > > > > to equivalent values, both converge very fast, and convergence time > > > > should not be an issue with any protocol (assuming reasonable network > > > > topology). EIGRP may be able to find an alternate path faster when > > > > that path goes through a neighbor, but OSPF is faster if the > > > > alternate path might be several hops away. > > > > > > > > If you run Appletalk or IPX routing, there is a definite advantage to > > > > using EIGRP. EIGRP also can bring incremental updating to a Netware > > > > 3.x environment that can't be upgraded. > > > > > > > > A few things to consider. > > > > > > > > >Please forgive me if this is shortsighted of me. > > > > > > > > > >Thanks in advance, > > > > >Dave > > > > > > > > > >_________________________________ > > > > >FAQ, list archives, and subscription info: > > > > >http://www.groupstudy.com/list/cisco.html > > > > >Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > > > > > > > > _________________________________ > > > > FAQ, list archives, and subscription info: > > > > http://www.groupstudy.com/list/cisco.html Report misconduct and > > > > Nondisclosure violations to [EMAIL PROTECTED] > > > > > > _________________________________ > > > FAQ, list archives, and subscription info: > > http://www.groupstudy.com/list/cisco.html > > > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > > > > _________________________________ > > FAQ, list archives, and subscription info: > > http://www.groupstudy.com/list/cisco.html > > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > > _________________________________ > FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > _________________________________ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
