I'm not sure I understand your entire question. But, I hope this helps... you have to many formulas.
What the recommendation states is that if you are running other routing protocols like ospf who takes its decisions based on bandwidth statements then you shouldn't change them, because it will also affect ospf. But here think about this you could change the K values for Eigrp, to only look at delay. then adjust the delay for what you wish. Hans PHAM wrote: >Hi, > >By default EIGRP uses 2 metric: Bandwidth and Delay to calculate routes. It >is recomended that we should not change the Actual Bandwith, but we can >change the interface delay for the traffic enginering purposes. > >The metric is : Min Bandwidth + Cumulative Delay. > >This can end up with a problem of "route non-consiste1nce". Here is my >counter example: > > R2 > / \ > / \ >R1 R4-----R5 > \ / > \ / > R3 > > >Link >1-2 : Bandwidth = 10M, delay = 10ms >2-4 : Bandwidth = 20M, delay = 5ms >1-3 : Bandwidth = 20M, delay = 15ms >3-4 : Bandwidth = 20M, delay = 5ms > >4-5 : Bandwidth = 10M, delay = 10ms > >The traffic from R1 to a network directly connected to R4 will be load >balance between routes R1-R2-R4 and R1-R3-R4. because the Metric of the two >routes are the same: > >R1-R2-R4 = Bandwidth (i.e. 10^7 / 10000) + Delay (i.e 1000 + 500) = = 1000 >+ 1000 + 500 = 2500 > >R1-R3-R4 = 500 + 1500 + 500 = 2500 > >However, traffic from R1 heading for R5 is not load-balanced because the >Metric R1-R2-R4-R5 is 3500 while the metric R1-R3-R4-R5 = 4000 > >that means all traffic from R1 -> R5 will go via R2 > >That's is a kind of inconcistence, which may lead to bottleneck, and cause >difficulty for traffic engineering. > >Could you please tell me if I am wrong or right ? > >If I am right, how we can overcome this problem. > > >Thanks a lot. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=38072&t=38043 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
