EIGRP for CCIE Written [7:64707]
Is EIGRP a Hybrid or Distance Vector protocol? Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=64707&t=64707 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: EIGRP for CCIE Written [7:64707]
""Johan Bornman"" wrote in message news:[EMAIL PROTECTED] > Is EIGRP a Hybrid or Distance Vector protocol? > Yes. Cisco docs call it a "hybrid" protocol because it combines some link state features, yet also has hop count ( distance ) limitations. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=64717&t=64707 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: EIGRP for CCIE Written [7:64707]
Hybrid. ""Johan Bornman"" wrote in message news:[EMAIL PROTECTED] > Is EIGRP a Hybrid or Distance Vector protocol? Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=64718&t=64707 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: EIGRP for CCIE Written [7:64707]
EIGRP is a hybrid. It can be said that it is a distance vector routing protocol that acts like a link state routing protocol. Scott - Original Message - From: "Johan Bornman" To: Sent: Friday, March 07, 2003 7:11 AM Subject: EIGRP for CCIE Written [7:64707] > Is EIGRP a Hybrid or Distance Vector protocol? Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=64721&t=64707 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: EIGRP for CCIE Written [7:64707]
speaking of NDA... Dave Reza wrote: > Hybrid. > > > ""Johan Bornman"" wrote in message > news:[EMAIL PROTECTED] > >>Is EIGRP a Hybrid or Distance Vector protocol? -- David Madland CCIE# 2016 Sr. Network Engineer Qwest Communications 612-664-3367 I would rather have a German division in front of me than a French one behind me." --- General George S. Patton Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=64723&t=64707 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: EIGRP for CCIE Written [7:64707]
At 12:11 PM 3/7/2003 +, Johan Bornman wrote: >Is EIGRP a Hybrid or Distance Vector protocol? Cisco calls it Hybrid. It looks pretty distance vector to me though. A hello mechanism and adjacencies does not a link state one make. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=64724&t=64707 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: EIGRP for CCIE Written [7:64707]
""MADMAN"" wrote in message news:[EMAIL PROTECTED] > speaking of NDA... if this is a question directly off the CCIE written it deserves to be revealed and publicly ridiculed :-> > >Dave > > Reza wrote: > > Hybrid. > > > > > > ""Johan Bornman"" wrote in message > > news:[EMAIL PROTECTED] > > > >>Is EIGRP a Hybrid or Distance Vector protocol? > -- > David Madland > CCIE# 2016 > Sr. Network Engineer > Qwest Communications > 612-664-3367 > > I would rather have a German division in front of me than a French one > behind me." > --- General George S. Patton Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=64727&t=64707 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: EIGRP for CCIE Written [7:64707]
""Peter van Oene"" wrote in message news:[EMAIL PROTECTED] > At 12:11 PM 3/7/2003 +, Johan Bornman wrote: > >Is EIGRP a Hybrid or Distance Vector protocol? > > Cisco calls it Hybrid. It looks pretty distance vector to me though. in what way? the hop count is pretty well hidden in the dark interior of the code. all those cost numbers, the ( also somewhat hidden ) topology table, and the ( somewaht hidden ) successor table certainly give it the appearance of link state. Chuck who considers all this stuff a kind of magic >A hello mechanism and adjacencies does not a link state one make. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=64728&t=64707 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: EIGRP for CCIE Written [7:64707]
Maybe the fact that EIGRP has an option to turn SPLIT HORIZON on/off is a big clue towards it being a DV protocol. Last time I checked OSPF/ISIS didn't have this option ;-) Cheers, Willy -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of The Long and Winding Road Sent: vrijdag 7 maart 2003 16:54 To: [EMAIL PROTECTED] Subject: Re: EIGRP for CCIE Written [7:64707] ""Peter van Oene"" wrote in message news:[EMAIL PROTECTED] > At 12:11 PM 3/7/2003 +, Johan Bornman wrote: > >Is EIGRP a Hybrid or Distance Vector protocol? > > Cisco calls it Hybrid. It looks pretty distance vector to me though. in what way? the hop count is pretty well hidden in the dark interior of the code. all those cost numbers, the ( also somewhat hidden ) topology table, and the ( somewaht hidden ) successor table certainly give it the appearance of link state. Chuck who considers all this stuff a kind of magic >A hello mechanism and adjacencies does not a link state one make. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=64729&t=64707 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: EIGRP for CCIE Written [7:64707]
At 03:54 PM 3/7/2003 +, The Long and Winding Road wrote: >""Peter van Oene"" wrote in message >news:[EMAIL PROTECTED] > > At 12:11 PM 3/7/2003 +, Johan Bornman wrote: > > >Is EIGRP a Hybrid or Distance Vector protocol? > > > > Cisco calls it Hybrid. It looks pretty distance vector to me though. > >in what way? the hop count is pretty well hidden in the dark interior of the >code. all those cost numbers, the ( also somewhat hidden ) topology table, >and the ( somewaht hidden ) successor table certainly give it the appearance >of link state. In a link state algorithm, a router builds a complete topology table for the bounded area in which it operates and then uses a spanning tree like algorithm (dijkstra in most cases) to calculate loop free paths. EIGRP simply does not do this. Primary and secondary paths in EIGRP are calculated based upon indirect information relayed by direct neighbors only using an advanced distance vector algorithm (DUAL). I think Cisco likes to call it Hybrid since many folks feel distance vector routing is inferior to link state and thus by labelling EIGRP as the best of both approaches, Cisco has put a positive spin on the protocol. This is typical marketing garbage from one of the best spin companies on the planet (in a neck and neck race with Microsoft and Harley Davidson for that matter) Pete >Chuck >who considers all this stuff a kind of magic > > > > >A hello mechanism and adjacencies does not a link state one make. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=64732&t=64707 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: EIGRP for CCIE Written [7:64707]
At 04:31 PM 3/7/2003 +, Willy Schoots wrote: >Maybe the fact that EIGRP has an option to turn SPLIT HORIZON on/off is >a big clue towards it being a DV protocol. Last time I checked OSPF/ISIS >didn't have this option ;-) OSPF and ISIS are actually distance vector between areas and use a strict two level hierarchy with a single backbone along with some LSP/LSA process rules that prevent loops. >Cheers, > >Willy > >-Original Message- >From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of >The Long and Winding Road >Sent: vrijdag 7 maart 2003 16:54 >To: [EMAIL PROTECTED] >Subject: Re: EIGRP for CCIE Written [7:64707] > >""Peter van Oene"" wrote in message >news:[EMAIL PROTECTED] > > At 12:11 PM 3/7/2003 +, Johan Bornman wrote: > > >Is EIGRP a Hybrid or Distance Vector protocol? > > > > Cisco calls it Hybrid. It looks pretty distance vector to me though. > >in what way? the hop count is pretty well hidden in the dark interior of >the >code. all those cost numbers, the ( also somewhat hidden ) topology >table, >and the ( somewaht hidden ) successor table certainly give it the >appearance >of link state. > >Chuck >who considers all this stuff a kind of magic > > > > >A hello mechanism and adjacencies does not a link state one make. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=64734&t=64707 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: EIGRP for CCIE Written [7:64707]
I agree completely. I think the whole "hybrid" was a marketing department decision. I'm just glad to find out I wasn't the only one who thought this. scott ""Peter van Oene"" wrote in message news:[EMAIL PROTECTED] > At 03:54 PM 3/7/2003 +, The Long and Winding Road wrote: > >""Peter van Oene"" wrote in message > >news:[EMAIL PROTECTED] > > > At 12:11 PM 3/7/2003 +, Johan Bornman wrote: > > > >Is EIGRP a Hybrid or Distance Vector protocol? > > > > > > Cisco calls it Hybrid. It looks pretty distance vector to me though. > > > >in what way? the hop count is pretty well hidden in the dark interior of the > >code. all those cost numbers, the ( also somewhat hidden ) topology table, > >and the ( somewaht hidden ) successor table certainly give it the appearance > >of link state. > > In a link state algorithm, a router builds a complete topology table for > the bounded area in which it operates and then uses a spanning tree like > algorithm (dijkstra in most cases) to calculate loop free paths. EIGRP > simply does not do this. Primary and secondary paths in EIGRP are > calculated based upon indirect information relayed by direct neighbors only > using an advanced distance vector algorithm (DUAL). > > I think Cisco likes to call it Hybrid since many folks feel distance vector > routing is inferior to link state and thus by labelling EIGRP as the best > of both approaches, Cisco has put a positive spin on the protocol. This is > typical marketing garbage from one of the best spin companies on the planet > (in a neck and neck race with Microsoft and Harley Davidson for that matter) > > Pete > > > > >Chuck > >who considers all this stuff a kind of magic > > > > > > > > >A hello mechanism and adjacencies does not a link state one make. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=64741&t=64707 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: EIGRP for CCIE Written [7:64707]
My netacad states: "Technically, EIGRP is an advanced distance-vector routing protocol that relies on features commonly associated with link-state protocols" Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=64733&t=64707 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: EIGRP for CCIE Written [7:64707]
The most correct answer, IMO, is that EIGRP is an enhanced distance vector protocol. Were I taking a cisco exam though, out of your two choices I'd go with hybrid. > -Original Message- > From: Johan Bornman [mailto:[EMAIL PROTECTED] > Sent: Friday, March 07, 2003 7:11 AM > To: [EMAIL PROTECTED] > Subject: EIGRP for CCIE Written [7:64707] > > > Is EIGRP a Hybrid or Distance Vector protocol? Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=64726&t=64707 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: EIGRP for CCIE Written [7:64707]
""John Hutchison"" wrote in message news:[EMAIL PROTECTED] > My netacad states: > > "Technically, EIGRP is an advanced distance-vector routing protocol that > relies on features commonly associated with link-state protocols" > in none of the Cisco exams I have ever taken has there ever been the more appropriate answer of "it depends" :-> Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=64745&t=64707 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: EIGRP for CCIE Written [7:64707]
The Cisco answer is hybrid, but that's a load of bullhocky. EIGRP is a DV protocol. Cisco marketing likes to call it a hybrid because it has some features that are also present in link state protocols, but they're not specifically link state features. EIGRP is NOT a link state protocol in any way. It is an advanced distance vector protocol. Period. Okay, I definitely need some coffee. :-) My head hurts and I'm grumpy. John >Hybrid. > > >""Johan Bornman"" wrote in message >news:[EMAIL PROTECTED] >> Is EIGRP a Hybrid or Distance Vector protocol? Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=64725&t=64707 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: EIGRP for CCIE Written [7:64707]
This really isn't the case. EIGRP is purely distance vector. In no way does it behave like a link state protocol. It establishes neighbor relationships and it uses hellos, as do OSPF and IS-IS, but those have nothing whatsoever to do with whether protocol is DV or LS. Some people get hung up on the complex metric, but who says DV protocols have to use only hop count? The actual operation of EIGRP is DV. There are no LS components to EIGRP. Regards, John >>> "Scott Terminiello" 3/7/03 8:28:00 AM >>> EIGRP is a hybrid. It can be said that it is a distance vector routing protocol that acts like a link state routing protocol. Scott - Original Message - From: "Johan Bornman" To: Sent: Friday, March 07, 2003 7:11 AM Subject: EIGRP for CCIE Written [7:64707] > Is EIGRP a Hybrid or Distance Vector protocol? Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=64752&t=64707 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: EIGRP for CCIE Written [7:64707]
I seem to recall a question on the recert along those lines. I can pretty much remeber the questions but I am not going to post it. This post would help one come to the correct conclusion. Dave The Long and Winding Road wrote: > ""MADMAN"" wrote in message > news:[EMAIL PROTECTED] > >>speaking of NDA... > > > > if this is a question directly off the CCIE written it deserves to be > revealed and publicly ridiculed :-> > > >> Dave >> >>Reza wrote: >> >>>Hybrid. >>> >>> >>>""Johan Bornman"" wrote in message >>>news:[EMAIL PROTECTED] >>> >>> Is EIGRP a Hybrid or Distance Vector protocol? >>> >>-- >>David Madland >>CCIE# 2016 >>Sr. Network Engineer >>Qwest Communications >>612-664-3367 >> >>I would rather have a German division in front of me than a French one >>behind me." >>--- General George S. Patton -- David Madland CCIE# 2016 Sr. Network Engineer Qwest Communications 612-664-3367 I would rather have a German division in front of me than a French one behind me." --- General George S. Patton Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=64738&t=64707 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: EIGRP for CCIE Written [7:64707]
I agree 100%, it is ENHANCED, read glorified, IGRP. Dave John Neiberger wrote: > This really isn't the case. EIGRP is purely distance vector. In no way > does it behave like a link state protocol. It establishes neighbor > relationships and it uses hellos, as do OSPF and IS-IS, but those have > nothing whatsoever to do with whether protocol is DV or LS. Some people > get hung up on the complex metric, but who says DV protocols have to use > only hop count? > > The actual operation of EIGRP is DV. There are no LS components to > EIGRP. > > Regards, > John > > >>>>"Scott Terminiello" 3/7/03 8:28:00 >>> > AM >>> > EIGRP is a hybrid. It can be said that it is a distance vector > routing > protocol that acts like a link state routing protocol. > > Scott > ----- Original Message ----- > From: "Johan Bornman" > To: > Sent: Friday, March 07, 2003 7:11 AM > Subject: EIGRP for CCIE Written [7:64707] > > > >>Is EIGRP a Hybrid or Distance Vector protocol? -- David Madland CCIE# 2016 Sr. Network Engineer Qwest Communications 612-664-3367 I would rather have a German division in front of me than a French one behind me." --- General George S. Patton Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=64773&t=64707 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: EIGRP for CCIE Written [7:64707]
""MADMAN"" wrote in message news:[EMAIL PROTECTED] > I agree 100%, it is ENHANCED, read glorified, IGRP. the REAL question is "which is better, EIGRP or L3 switching?" ;-> > >Dave > > John Neiberger wrote: > > This really isn't the case. EIGRP is purely distance vector. In no way > > does it behave like a link state protocol. It establishes neighbor > > relationships and it uses hellos, as do OSPF and IS-IS, but those have > > nothing whatsoever to do with whether protocol is DV or LS. Some people > > get hung up on the complex metric, but who says DV protocols have to use > > only hop count? > > > > The actual operation of EIGRP is DV. There are no LS components to > > EIGRP. > > > > Regards, > > John > > > > > >>>>"Scott Terminiello" 3/7/03 8:28:00 > >>> > > AM >>> > > EIGRP is a hybrid. It can be said that it is a distance vector > > routing > > protocol that acts like a link state routing protocol. > > > > Scott > > - Original Message - > > From: "Johan Bornman" > > To: > > Sent: Friday, March 07, 2003 7:11 AM > > Subject: EIGRP for CCIE Written [7:64707] > > > > > > > >>Is EIGRP a Hybrid or Distance Vector protocol? > -- > David Madland > CCIE# 2016 > Sr. Network Engineer > Qwest Communications > 612-664-3367 > > I would rather have a German division in front of me than a French one > behind me." > --- General George S. Patton Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=64775&t=64707 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: EIGRP for CCIE Written [7:64707]
At 9:12 PM + 3/7/03, MADMAN wrote: >I agree 100%, it is ENHANCED, read glorified, IGRP. > >Dave While it isn't link state, the DUAL algorithm is completely different than that of IGRP. > >John Neiberger wrote: >> This really isn't the case. EIGRP is purely distance vector. In no way >> does it behave like a link state protocol. It establishes neighbor >> relationships and it uses hellos, as do OSPF and IS-IS, but those have >> nothing whatsoever to do with whether protocol is DV or LS. Some people >> get hung up on the complex metric, but who says DV protocols have to use >> only hop count? >> >> The actual operation of EIGRP is DV. There are no LS components to >> EIGRP. >> >> Regards, >> John >> >> >>>>>"Scott Terminiello" 3/7/03 8:28:00 >>>> >> AM >>> >> EIGRP is a hybrid. It can be said that it is a distance vector >> routing >> protocol that acts like a link state routing protocol. >> >> Scott >> - Original Message - >> From: "Johan Bornman" >> To: >> Sent: Friday, March 07, 2003 7:11 AM >> Subject: EIGRP for CCIE Written [7:64707] >> >> >> >>>Is EIGRP a Hybrid or Distance Vector protocol? >-- >David Madland >CCIE# 2016 >Sr. Network Engineer >Qwest Communications >612-664-3367 > >I would rather have a German division in front of me than a French one >behind me." >--- General George S. Patton Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=64785&t=64707 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: EIGRP for CCIE Written [7:64707]
That is true but that behavior is not specific to link state protocols. I've already deleted the earlier posts from this thread but I believe it was Peter Van Oene (and maybe someone else) who explained the technical differences between DV and LS operations. If you don't have that message any longer you can go to the GroupStudy website and look at it on the web board. I thought that post explained the differences between LS and DV very well. John >>> "Scott Terminiello" 3/7/03 1:13:02 PM >>> It was my understanding that EIGRP only notifies its neighbors of topology changes the same way OSPF works. This is in contrast to RIP which sends out an update at specified intervals (30 secs for RIPv1) regardless of whether a topology change or not. Scott - Original Message - From: "John Neiberger" To: Sent: Friday, March 07, 2003 2:02 PM Subject: Re: EIGRP for CCIE Written [7:64707] > This really isn't the case. EIGRP is purely distance vector. In no way > does it behave like a link state protocol. It establishes neighbor > relationships and it uses hellos, as do OSPF and IS-IS, but those have > nothing whatsoever to do with whether protocol is DV or LS. Some people > get hung up on the complex metric, but who says DV protocols have to use > only hop count? > > The actual operation of EIGRP is DV. There are no LS components to > EIGRP. > > Regards, > John > > >>> "Scott Terminiello" 3/7/03 8:28:00 > AM >>> > EIGRP is a hybrid. It can be said that it is a distance vector > routing > protocol that acts like a link state routing protocol. > > Scott > - Original Message - > From: "Johan Bornman" > To: > Sent: Friday, March 07, 2003 7:11 AM > Subject: EIGRP for CCIE Written [7:64707] > > > > Is EIGRP a Hybrid or Distance Vector protocol? [EMAIL PROTECTED] Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=64793&t=64707 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: EIGRP for CCIE Written [7:64707]
It was my understanding that EIGRP only notifies its neighbors of topology changes the same way OSPF works. This is in contrast to RIP which sends out an update at specified intervals (30 secs for RIPv1) regardless of whether a topology change or not. Scott - Original Message - From: "John Neiberger" To: Sent: Friday, March 07, 2003 2:02 PM Subject: Re: EIGRP for CCIE Written [7:64707] > This really isn't the case. EIGRP is purely distance vector. In no way > does it behave like a link state protocol. It establishes neighbor > relationships and it uses hellos, as do OSPF and IS-IS, but those have > nothing whatsoever to do with whether protocol is DV or LS. Some people > get hung up on the complex metric, but who says DV protocols have to use > only hop count? > > The actual operation of EIGRP is DV. There are no LS components to > EIGRP. > > Regards, > John > > >>> "Scott Terminiello" 3/7/03 8:28:00 > AM >>> > EIGRP is a hybrid. It can be said that it is a distance vector > routing > protocol that acts like a link state routing protocol. > > Scott > ----- Original Message ----- > From: "Johan Bornman" > To: > Sent: Friday, March 07, 2003 7:11 AM > Subject: EIGRP for CCIE Written [7:64707] > > > > Is EIGRP a Hybrid or Distance Vector protocol? Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=64761&t=64707 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: EIGRP for CCIE Written [7:64707]
Scott Terminiello wrote: > > It was my understanding that EIGRP only notifies its neighbors > of topology > changes the same way OSPF works. This is in contrast to RIP > which sends out > an update at specified intervals (30 secs for RIPv1) regardless > of whether a > topology change or not. That doesn't make EIGRP a link-state protocol though. Cats and dogs have a lot of the same features. A cat is not a dog, though. Cats purr. Dogs slobber. End of story. (Cats are superior.) Seriously, a link-state routing protocol creates a mathematical graph that depicts the internetwork. Then it runs a shortest path algorithm to determine the shortest path to all points in the graph when the nodes and links in the graph are known Look up shortest path algorithm in Google. There's some great stuff out there, including animated demonstrations. A shortest path algorithm is used for many applications, especially training computer scientists. It turns out that one can find the shortest path from a given source to all points in a graph in the same time that one can find the shortest path to a single destination, hence this problem is sometimes called the single-source shortest path problem. Dijstra's algorithm, used in most link-state routing protocols, solve the single-source shortest path problem. A distance-vector routing protocol, such as EIGRP, doesn't use a shortest-path algorithm but instead creates a consolidated list of all reachable destinations. (Notice that the data structure is a list, not a graph.) If the list contains multiple entries for a destination (because there are multiple ways to reach the destination), the entries are sorted by metric and the one with the lowest metric is selected. EIGRP does a few other things that most DV protocols don't do. It keeps track of feasible successors, for example. So, it needs more than just a list data structure, but it doesn't have a graph of the internetwork, and it doesn't run the shortest path algorithm. And see Peter's message for the definitive answer! (Well, not the one about ARP switching. :-) Priscilla > > Scott > > - Original Message - > From: "John Neiberger" > To: > Sent: Friday, March 07, 2003 2:02 PM > Subject: Re: EIGRP for CCIE Written [7:64707] > > > > This really isn't the case. EIGRP is purely distance > vector. In no way > > does it behave like a link state protocol. It establishes > neighbor > > relationships and it uses hellos, as do OSPF and IS-IS, but > those have > > nothing whatsoever to do with whether protocol is DV or LS. > Some people > > get hung up on the complex metric, but who says DV protocols > have to use > > only hop count? > > > > The actual operation of EIGRP is DV. There are no LS > components to > > EIGRP. > > > > Regards, > > John > > > > >>> "Scott Terminiello" 3/7/03 8:28:00 > > AM >>> > > EIGRP is a hybrid. It can be said that it is a distance > vector > > routing > > protocol that acts like a link state routing protocol. > > > > Scott > > - Original Message - > > From: "Johan Bornman" > > To: > > Sent: Friday, March 07, 2003 7:11 AM > > Subject: EIGRP for CCIE Written [7:64707] > > > > > > > Is EIGRP a Hybrid or Distance Vector protocol? > > Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=64795&t=64707 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: EIGRP for CCIE Written [7:64707]
Cats are great. Depends what kind of sauce you use thoughJust kidding. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=64861&t=64707 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
OT: Re: EIGRP for CCIE Written [7:64707]
At 09:30 PM 3/7/2003 +, The Long and Winding Road wrote: >""MADMAN"" wrote in message >news:[EMAIL PROTECTED] > > I agree 100%, it is ENHANCED, read glorified, IGRP. > > >the REAL question is "which is better, EIGRP or L3 switching?" ;-> I'm working on a draft for ARP switching. Still struggling with what layer it works at though and what it specifically does. I'll let you know when I'm finished. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=64782&t=64707 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
OT Re: EIGRP for CCIE Written [7:64707]
I have an Akita dog. (pure bred) She's a year and a couple months old. She's 5 ft tall and about 100 pounds. She'll eat any cat. Dogs are superior. :) Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=64825&t=64707 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Dogs and Cats, Re: OT Re: EIGRP for CCIE Written [7:64707]
""John Hutchison"" wrote in message news:[EMAIL PROTECTED] > I have an Akita dog. (pure bred) She's a year and a couple months old. She's > 5 ft tall and about 100 pounds. She'll eat any cat. Dogs are superior. :) Dogs naturally love people; cats naturally dislike people and you have to train them to be friendly. :-) Dogs have owners, cats have staff. Dogs are better. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=64835&t=64707 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Dogs and Cats, Re: OT Re: EIGRP for CCIE Written [7:64707]
Ahhh, but cats are better because dogs won't try and sit between you and your monitor; on top of your monitor swinging their tail in front of it; or lay with all their body weight on your mouse-hand, do they? Oh wait... those aren't good things, are they - never mind... At least cats sleep alot, and they generally leave you alone while their doing that, right? Just believe me, cats are better... --- Dennis - Original Message - From: "John Neiberger" To: Sent: Saturday, March 08, 2003 9:50 AM Subject: Dogs and Cats, Re: OT Re: EIGRP for CCIE Written [7:64707] > ""John Hutchison"" wrote in message > news:[EMAIL PROTECTED] > > I have an Akita dog. (pure bred) She's a year and a couple months old. > She's > > 5 ft tall and about 100 pounds. She'll eat any cat. Dogs are superior. :) > > Dogs naturally love people; cats naturally dislike people and you have to > train them to be friendly. :-) > > Dogs have owners, cats have staff. > > Dogs are better. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=64836&t=64707 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Dogs and Cats, Re: OT Re: EIGRP for CCIE Written [7:64707]
You are correct about cats disliking people, I never like cat, I love dogs, Our dogs love our kids and our kids love our dogs...Our dog is part of our family..Dog are better than cats. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of John Neiberger Sent: Saturday, March 08, 2003 12:51 PM To: [EMAIL PROTECTED] Subject: Dogs and Cats, Re: OT Re: EIGRP for CCIE Written [7:64707] ""John Hutchison"" wrote in message news:[EMAIL PROTECTED] > I have an Akita dog. (pure bred) She's a year and a couple months old. She's > 5 ft tall and about 100 pounds. She'll eat any cat. Dogs are superior. :) Dogs naturally love people; cats naturally dislike people and you have to train them to be friendly. :-) Dogs have owners, cats have staff. Dogs are better. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=64838&t=64707 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
