From: ISolveSystems (support@isolvesystems.com)
Date: Sat Sep 01 2007 - 16:42:16 ART
Just in case you haven't got your answer. IEWB-Lab10-Task3.2 has EIGRP
metric delay calculation that explains this.
On 8/30/07, Carlos Trujillo Jimenez <nergal888@hotmail.com> wrote:
>
> Hi Friends, let me explain a task where it is broking my head for serveral
> days, searching the answer in the internet without a clear answer.
>
> I have the following scenario:
>
> Router 4 and Router 5 are direclty connected each other via an ethernet
> link.
> They are also connected each other via a frame relay link, but in the
> middle
> of the frame relay cloud there is Router 1 acting as the HUB, so it means
> that Router 4 and 5 are the SPOKES, and for they to talk each other over
> the
> frame relay cloud, they must first pass al traffic to the hub router
> Router
> 1.
>
> All these mentioned links and routers are running EIGRP.
>
> Well, the task mentiones to load balance in the way that traffic from
> ROUTER
> 4 destined to ROUTER 5 is load balanced ou the ethernet link to ROUTER 5
> and
> the frame relay link to ROUTER 1.
> Traffic should be distributed between the ETHERNET and the FRAME RELAY
> LINK
> in a ratio of 4:1.
>
> Looking at the task, the quick answer is to enable variance for load
> balance
> unequal cost paths between router 4 and 5 via both links, the task I
> answer
> my self and try to look at the web without succesful answer is how to
> manipulate the metrics for the LOAD BALANCING RATIO OF 4:1??
>
> Looking at the solution workbook it dont gives a detailed or clear answer,
> it states the following.
>
> R1.
>
> interface serial 0/0 (frame relay)
> delay 1
>
> R4.
> interface serial 0/0 (frame relay)
> delay 21500
>
> interface ethermeyt 0/1
> delay 6000
>
> router eigrp 1024
> variance 4
>
> R5.
>
> interface serial 0/0
> delay 1
>
> The solutions works but I dont understand how, can anyone please give an
> explain about the related task, would appreciate a lot any answer.
>
> Anyway I paste what the show ip route ouput from R4 about a route learned
> from R5 via both links after the commands mentioned.
> I look at the TRAFFIC SHARE COUNT for ETHERNET and for SERIAL link, and
> for
> the first the value is 120, for the second the value is 61. MY QUESTION IS
> DO THIS VALUE HAS SOMETHING TO DO WITH THE RATIO LOAD BALANCE METHOD??
>
>
> p4r4#show ip route 222.22.2.0
> Routing entry for 222.22.2.0/24
> Known via "eigrp 1024", distance 170, metric 4121600, type external
> Redistributing via eigrp 1024
> Last update from 174.1.145.1 on Serial0/0, 00:00:02 ago
> Routing Descriptor Blocks:
> * 174.1.45.5, from 174.1.45.5, 00:00:02 ago, via Ethernet1/0
> Route metric is 4121600, traffic share count is 120
> Total delay is 61000 microseconds, minimum bandwidth is 1000 Kbit
> Reliability 255/255, minimum MTU 1500 bytes
> Loading 1/255, Hops 1
> 174.1.145.1, from 174.1.145.1, 00:00:02 ago, via Serial0/0
> Route metric is 8089856, traffic share count is 61
> Total delay is 216010 microseconds, minimum bandwidth is 1000 Kbit
> Reliability 255/255, minimum MTU 1500 bytes
> Loading 1/255, Hops 2
>
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