Is it possible to aggregate and then load balance the unequal ethernet circuits like so:
I have two ethenet circuits on my Cisco router. Both have equal costs to the next hop.
Ethernet Circuit #1- 200M
Ethernet Circuit #2 - 100M
Can I aggregate both ethernet circuits so that the total amount of bandwidth available is 300M? Can I then load balance it so both circuits are equally utilized?
* If I have 150M of traffic flowing to the next hop then the router would spread the load across both links like so:
100M through Ethernet Circuit #1.
50M through Ethernet Circuit #2.
* The formula to use for this would be:
Utilization / Total Bandwidth = percentage of utilization required per link
150/300 = 0.5
0.5 x bandwidth of Ethernet #1 = 0.5 x 200 = 100M
0.5 x bandwidth of Ethernet #1 = 0.5 x 100 = 50M
* If there was a total of 250M of traffic flowing to the next hop, and applying the formula above, the router would work out that the load distributed across both ethernet links would be:
166M through Ethernet Circuit #1.
84M through Ethernet Circuit #2.
February 16, 2009 5:28 AM
May 13, 2010 4:07 PM