Hi Jim, The formula is right above table 1:
EIGRP composite cost metric = 256*((K1*Bw) + (K2*Bw)/(256 - Load) + (K3*Delay)*(K5/(Reliability + K4))) So your solution (ignoring the leading 0, which off the top of my head I forget the significance of -- maybe that's the magic new K they added in recent code), would use BW, Delay, and then 0/Reliability+1, which clearly wouldn't do much for you. Off hand, I forget if IOS just ignores K4 if K5 is not also set, but you'd kind of think it would need to so as to avoid a divide-by-zero error. I always remember that the default is "10100" because it looks like 10/100 as in a switch port. So obviously positions 1 & 3 (K1, and K3) rep the default weighted values of BW and Delay. I'd look up anything else, as the consequences are huge to forgetting which on is reliability and which one is load (as you've observed). On Mon, Mar 31, 2014 at 1:43 PM, Jim Newell <[email protected]> wrote: > Thanks Bob. I navigated to that link yesterday while trying to complete a > task > and looked at the items listed in table 1 and the items in table 2 and > made an > assumption that they should be matched up according to the listed order. > When > checking the proposed solution later I had one value in the wrong location. > > Requirement was to use delay, load and bandwidth: > My solution: metric weights 0 1 0 1 1 0 > Proposed solution: metric weights 0 1 1 1 0 0 > > I have run into issues with this topic before, so it may just be that I am > missing something obvious > > Much appreciated > Kind regards > jpn > > ------ Original Message ------ > Received: 12:12 PM EDT, 03/31/2014 > From: Bob McCouch <[email protected]> > To: Jim Newell <[email protected]>Cc: CCIE OSL <[email protected] > > > Subject: Re: [OSL | CCIE_RS] EIGRP Metric Weight > > Doc-CD is a good place to start: > > > http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_eigrp/configuration/15-mt/ire-15-mt-book/ire-enhanced-igrp.html#GUID-79D5B9EF-B4D4-4034-B275-347E866420C0 > > Support Home > Products > Cisco IOS and NX-OS Software > Cisco IOS > Cisco > IOS Software Release 15M&T > Cisco IOS 15.1M&T > Cisco IOS 15.1(4)M > IP > Routing: EIGRP Configuration Guide > EIGRP > EIGRP Cost Metrics > > > > On Mon, Mar 31, 2014 at 8:59 AM, Jim Newell <[email protected]> wrote: > > > Greetings, > > I am not sure anyone else has had this same issue. I find myself always > > failing tasks that require adjusting the metric weights under the EIGRP > > process - something that should be easy points. I have searched > > unsuccessfully for a good reference that shows how bandwidth, delay and > > load > > are mapped to values K1, K2, etc. If anyone has a good, reliable > reference > > that clears this up can you kindly point me to it. > > > > Much appreciated > > Kind regards > > jpn > > > > _______________________________________________ > > Free CCIE R&S, Collaboration, Data Center, Wireless & Security Videos :: > > > > iPexpert on YouTube: www.youtube.com/ipexpertinc > > > > _______________________________________________ > Free CCIE R&S, Collaboration, Data Center, Wireless & Security Videos :: > > iPexpert on YouTube: www.youtube.com/ipexpertinc > _______________________________________________ Free CCIE R&S, Collaboration, Data Center, Wireless & Security Videos :: iPexpert on YouTube: www.youtube.com/ipexpertinc
