Comments on: EIGRP metrics and path selection http://ccnprecertification.com/2004/05/05/eigrp-metrics-and-path-selection/ Study notes for the Cisco CCNP exam Sun, 25 Jul 2010 02:25:15 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: Kishore http://ccnprecertification.com/2004/05/05/eigrp-metrics-and-path-selection/comment-page-1/#comment-92014 Kishore Wed, 07 Jul 2010 07:00:15 +0000 http://ertw.com/ccnp/?p=22#comment-92014 MTU doesnt affect path selection but I guess its just been included so that maybe in future they might put that in as a consideration as well. just like ospf does check MTU when exchanging DD packets, maybe in future Eigrp might use this as well. Who knows;-) MTU doesnt affect path selection but I guess its just been included so that maybe in future they might put that in as a consideration as well.

just like ospf does check MTU when exchanging DD packets, maybe in future Eigrp might use this as well. Who knows;-)

]]> By: sean http://ccnprecertification.com/2004/05/05/eigrp-metrics-and-path-selection/comment-page-1/#comment-92011 sean Sun, 04 Jul 2010 01:46:39 +0000 http://ertw.com/ccnp/?p=22#comment-92011 You guys are right, it's tracked but not used in the calculation. Why the heck does every book I see, from a CCNA text up to Doyle, feel the need to include it when talking about metrics when it's really not used? You guys are right, it’s tracked but not used in the calculation.

Why the heck does every book I see, from a CCNA text up to Doyle, feel the need to include it when talking about metrics when it’s really not used?

]]> By: Tom http://ccnprecertification.com/2004/05/05/eigrp-metrics-and-path-selection/comment-page-1/#comment-92008 Tom Fri, 02 Jul 2010 09:19:54 +0000 http://ertw.com/ccnp/?p=22#comment-92008 Although MTU and hop count are mentioned in <b>show ip eigrp topology</b>, they aren't in the formula for calculating the metric, being <i>metric = [K1 * bandwidth + (K2 * bandwidth) / (256 - load) + K3 * delay] * [K5 / (reliability + K4)]</i> so they really aren't metrics, since there is no way to include them in the metric calculation. Although MTU and hop count are mentioned in show ip eigrp topology, they aren’t in the formula for calculating the metric, being metric = [K1 * bandwidth + (K2 * bandwidth) / (256 - load) + K3 * delay] * [K5 / (reliability + K4)] so they really aren’t metrics, since there is no way to include them in the metric calculation.

]]> By: sean http://ccnprecertification.com/2004/05/05/eigrp-metrics-and-path-selection/comment-page-1/#comment-91913 sean Thu, 18 Jun 2009 18:23:59 +0000 http://ertw.com/ccnp/?p=22#comment-91913 Hi, Have a look at http://www.cisco.com/en/US/tech/tk365/technologies_white_paper09186a0080094cb7.shtml Minimum MTU along the path is an EIGRP metric, with the default K values it's not calculated though. It's there, look at the <em>show ip eigrp top</em> output. Sean Hi,

Have a look at http://www.cisco.com/en/US/tech/tk365/technologies_white_paper09186a0080094cb7.shtml

Minimum MTU along the path is an EIGRP metric, with the default K values it’s not calculated though. It’s there, look at the show ip eigrp top output.

Sean

]]> By: nt.factor http://ccnprecertification.com/2004/05/05/eigrp-metrics-and-path-selection/comment-page-1/#comment-91912 nt.factor Tue, 09 Jun 2009 01:52:46 +0000 http://ertw.com/ccnp/?p=22#comment-91912 I believe that MTU is not a metric in EIGRP I believe that MTU is not a metric in EIGRP

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