Interesting! I learned OSPF on BSCN book but never deploy it. EIGRP has been very easy to configured and very fast converged comparing to RIP/RIPv2. It seems OSPF gets lots of favor as a stardard protocol. I am curious if OSPF support load sharing on equal / unequal paths? Thanks All for the input!
Thomas ""Priscilla Oppenheimer"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > Good answers. Here are a few additional comments. > > OSPF is an IETF standard, which has the following advantages: > > You have access to the RFCs that describe it, which can help when > troubleshooting and designing network changes, even though the RFCs aren't > very readable. > > Engineers from around the world can enhance OSPF, using standard IETF > procedures and taking advantage of IETF work on advanced routing protocol > features. > > > EIGRP is not an IETF standard. You said below that the spec if available, > but that's not true. Cisco has lots of documentaton on EIGRP but they have > not released a specification for it. > > The fact that EIGRP is not a standard means that it probably won't be able > to take advantage of new IETF work, or at least not as easily, and not with > so much input from engineers around the world. > > > By the way, EIGRP converges very quickly too. And it doesn't use load and > reliability in its metric by default. Also it passes MTU info around, but > MTU isn't part of the metric. In fact, figuring out exactly how a router > running EIGRP uses MTU is one of those things that you can't find a > specification on. > > > Good discussion! > > Priscilla > > > [EMAIL PROTECTED] (Kaj J. Niemi) wrote: > > > > In mail.net.groupstudy.pro, you wrote: > > > > > I have been using EIGRP for our routing protocol for the > > last couple years, > > > which is prettly great. The controversal of selecting the > > routing protocol > > > came up again recently. I would like to have your opinion > > on EIGRP vs. > > > OSPF, which one is refered? What's the weakness and > > advantage? Thanks! > > > > - OSPF is pretty much supported by all vendors nowadays. > > - OSPF calculates a tree from the point of origin using > > Dijkstra's > > algorithm (SPF) > > - OSPF is a link-state protocol, you get really fast > > convergence by tuning > > the timers > > - All area 0 (ie. backbone) routers have a complete overview of > > the > > network > > - Easy to deploy > > - By default link-cost is calculated from the bandwidth of the > > link > > - Only for IP > > - Filtering on ABR/ASBR only, between areas preferably > > > > - EIGRP, although the spec is available, only you usually find > > it on only > > brand Ci$co routers. > > - EIGRP calculates it's view of the world using DUAL (Diffusing > > update > > algorithm) > > - Router stores its neighbors routing tables and queries its > > neighbors if > > no specific route is found > > - It's pretty much a distance-vector protocol with some > > features borrowed > > from link-state ones. > > - Pretty easy to deploy > > - Is bugwards compatible with IGRP > > - Works with IP and IPX > > - Easy to filter and aggregate, on any interface (ie you can do > > "areas" > > quite easily) > > - Takes into account path reliability, loading, MTU, lowest > > bandwidth > > between destinations, total delay when calculating the best > > way of > > getting to the destination. > > - Enterprise people tend to prefer EIGRP over others because > > it's easy to > > do ISDN backup with it > > > > > > Most people would nowadays choose OSPF because their CIOs might > > want to > > keep a second vendor option on the table. Service providers > > would probably > > choose IS-IS (my favorite) or OSPF. > > > > > > > > // kaj Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=62459&t=62419 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
