EIGRP Traffic Share Count

Hello Everyone,

I am having difficulty calculating the EIGRP Traffic Share Count. As far as
my understanding regarding Traffic Share Count is, you divide the largest
metric with lowest to forward packets based on number. For example

A-X = Metric is 10
B-X = Metric is 20
C-X = Metric is 30
D-X = Metric is 40
E-X = Metric is 90

If I configure variance 4, it means all above metric will be used for load
balancing except E-X (90), because it does not fall under 80 (Lowest Metric
X 4). So when calculate, I still use E-X Metric for Traffic Share Count.

A-X = Metric is 10 = Traffic Share Count (90/10) = 9
B-X = Metric is 20 = Traffic Share Count (90/20) = 5
C-X = Metric is 30 = Traffic Share Count (90/30) = 3
D-X = Metric is 40 = Traffic Share Count (90/40) = 2

It means 9 packets will be sent via A-X, 5 packets via B-X, 3 packets via
C-X, and 2 packets via D-X and round robin. Am I correct till here??

Now, when I have below output, how is Traffic Share Count calculated

Rack1R6#show ip route 155.1.9.9
Routing entry for 155.1.9.0/24
  Known via "eigrp 100", distance 90, metric 3072, type internal
  Redistributing via eigrp 10, eigrp 100
  Advertised by eigrp 10
  Last update from 155.1.146.1 on FastEthernet0/0.146, 00:01:04 ago
  Routing Descriptor Blocks:
    155.1.146.1, from 155.1.146.1, 00:01:04 ago, via FastEthernet0/0.146
      Route metric is 3584, traffic share count is 103
      Total delay is 140 microseconds, minimum bandwidth is 1544 Kbit
      Reliability 255/255, minimum MTU 1500 bytes
      Loading 1/255, Hops 4

  * 155.1.67.7, from 155.1.67.7, 00:01:04 ago, via FastEthernet0/0.67
      Route metric is 3072, traffic share count is 120
      Total delay is 120 microseconds, minimum bandwidth is 100000 Kbit
      Reliability 255/255, minimum MTU 1500 bytes
      Loading 1/255, Hops 2

Anyone's help will be highly appreciated,

Regards,

Bilal

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Received on Sun Sep 26 2010 - 20:14:29 ART