From: Joe Soricelli (jsoricelli@xxxxxxxx)
Date: Fri Oct 15 1999 - 00:51:48 GMT-3
The metric is :
{[k1*BW + (k2*BW)/(256-LOAD) + k3*DLY]*[k5/RLY + k4]}*256
Where BW is 10^7/BW on an inteface
Where DLY is DLY on an interface/10
Smallest BW plus sum of DLYs is the default metric.
-joe
------------------------------------------------------------------
Joseph M. Soricelli, CCIE #4803, CCNP, CCSI #20666
EMAIL: jsoricelli@ccci.com
Chesapeake Network Solutions
8110 Gatehouse Road, Suite 101E Phone: (703) 207-0757
Falls Church, VA 22042 Fax: (703) 207-0441
FYI - About Chesapeake: We are a Cisco Certified Training and
professional services partner. We offer most of the Cisco
training courses as well as training for Fore, NetScout, and
CheckPoint-1 Firewalls. We provide network consulting services,
including design, network health, management, firewall,
and problem solving. We now have 23 CCIEs on our staff
of instructor/consultants.
-------------------------------------------------------------------
-----Original Message-----
From: josh@mstates.com <josh@mstates.com>
To: 'Joe Soricelli' <jsoricelli@fridge.ccci.com>
Date: Thursday, October 14, 1999 4:22 PM
Subject: RE: EIGRP route calculation
>Can someone please provide the actual formula for calculating the metric on
>EIGRP?
>
>-----Original Message-----
>From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
>Joe Soricelli
>Sent: Thursday, October 14, 1999 12:58 PM
>To: ccielab@groupstudy.com
>Subject: Re: EIGRP route calculation
>
>
>The maps helped out, Thanks.
>
>I can tell you that unless the defaults have been altered, that Choice A
>will give a better metric due to bandwidth speeds.
>
>When you actually do the calculation based on the show int stats below, you
>get 68352 for Choice A and 2178048 for Choice B. Not even close!!
>
>-joe
>------------------------------------------------------------------
> Joseph M. Soricelli, CCIE #4803, CCNP, CCSI #20666
> EMAIL: jsoricelli@ccci.com
>
> Chesapeake Network Solutions
> 8110 Gatehouse Road, Suite 101E Phone: (703) 207-0757
> Falls Church, VA 22042 Fax: (703) 207-0441
>
> FYI - About Chesapeake: We are a Cisco Certified Training and
> professional services partner. We offer most of the Cisco
> training courses as well as training for Fore, NetScout, and
> CheckPoint-1 Firewalls. We provide network consulting services,
> including design, network health, management, firewall,
> and problem solving. We now have 23 CCIEs on our staff
> of instructor/consultants.
>-------------------------------------------------------------------
>
>-----Original Message-----
>From: Jason Aarons <jaarons@hotmail.com>
>To: jsoricelli@fridge.ccci.com <jsoricelli@fridge.ccci.com>;
>ccielab@groupstudy.com <ccielab@groupstudy.com>
>Date: Thursday, October 14, 1999 2:27 PM
>Subject: Re: EIGRP route calculation
>
>
>>Here is a map of the choices. Choice A has not been installed (yet) but
>>neeed to know if it will create a better EIGRP metric than Choice B.
Also,
>>this is good stuff..since I included load with EIGRP into the picture..
>>
>>
>>Choice A.
>>Source---FE---Router1--DS3--Router2--FE---Router3---OC12---Router4---FE---
-
>Destination
>>
>>Choice B.
>>Source----FE---Router1----T1----Router4----FE----Desination
>>
>>
>>After mapping it out, I added some details below and corrected some
>errors -
>>jason
>>
>>
>>----Original Message Follows----
>>From: "Joe Soricelli" <jsoricelli@ccci.com>
>>To: "Jason Aarons" <jaarons@hotmail.com>
>>Subject: Re: EIGRP route calculation
>>Date: Thu, 14 Oct 1999 08:33:56 -0400
>>
>>Jason-
>>
>>A little more detail please. First, a map would be good. Second, are you
>>trying to figure out why one route was choosen over another?
>>
>>-joe
>>------------------------------------------------------------------
>>
>>-----Original Message-----
>>From: Jason Aarons <jaarons@hotmail.com>
>>To: ccielab@groupstudy.com <ccielab@groupstudy.com>
>>Date: Wednesday, October 13, 1999 5:47 PM
>>Subject: EIGRP route calculation
>>
>>
>> >Problem:
>> >
>> >Using K1, K2, K3 (bandwidth, delay, load) determine whether the metric
>via
>> >Router1-Router2-Router3 is better Router1s direct T-1 (and given
>> >load).
>> >
>> >
>> >ROUTER1#show int serial5/0
>> >Serial5/0 is up, line protocol is up
>> > MTU 4470 bytes, BW 44210 Kbit, DLY 200 usec, rely 255/255, load 1/255
>> >
>> >ROUTER2#show int faste0/0
>> >FastEthernet0/0 is up, line protocol is up
>> > MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec, rely 255/255, load 1/255
>> >
>> >ROUTER3#show int pos5/0/0
>> >POS5/0/0 is up, line protocol is up
>> > MTU 4470 bytes, BW 155000 Kbit, DLY 100 usec, rely 255/255, load
3/255
>> >
>>Router4#show int faste5/1/0
>>FastEthernet5/1/0 is up, line protocol is up
>> MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec, rely 255/255, load 1/255
>>
>> >
>> >
>> >! Router1 a direct T-1 to destinateion with metric 2181634
>> >router1#show ip route x.y.z.a
>> >Routing entry for x.y.z.a/24
>> > Known via "eigrp 260", distance 110, metric 2181634, type internal
>> > Redistributing via eigrp 120
>> > Last update from x.y.z.b on Serial3/2, 00:33:11 ago
>> > Routing Descriptor Blocks:
>> > * x.y.z.b, from x.y.z.b, 00:33:11 ago, via Serial3/2
>> > Route metric is 2181634, traffic share count is 1
>> > Total delay is 20200 microseconds, minimum bandwidth is 1544 Kbit
>> > Reliability 255/255, minimum MTU 1500 bytes
>> > Loading 7/255, Hops 2
>> >
>>
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