From: John Garrett (John.Garrett.B@xxxxxxxxx)
Date: Fri Oct 15 1999 - 09:45:45 GMT-3
Since the default configuration of EIGRP only uses K1 and K3, what values are
given to the other parameters?
If it is 0, then it looks like the entire route choice depends on k1 only.
John Garrett
groupstudy nobody <nobody@groupstudy.com> on 10/15/99 12:30:56 AM
Please respond to "DDA.RFC-822=jsoricelli@ccci.com/P=Internet/A= /C=us" @ X400
To: "DDA.RFC-822=ccielab@groupstudy.com/P=Internet/A= /C=us"@X400
cc:
Subject: Re: EIGRP route calculation
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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