From: Carlos Trujillo Jimenez (nergal888@hotmail.com)
Date: Thu Aug 30 2007 - 14:58:12 ART
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
This archive was generated by hypermail 2.1.4 : Sat Sep 01 2007 - 11:32:13 ART