[c-nsp] Load Balancing of Unequal Ethernet Bandwidth

[Andy Saykao]

 Is it possible to aggregate and then load balance 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 to the next hop is is 300M? 
Can I then load balance it so both circuits are equally utilized?

For example...

* 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 something like:

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.

Any ideas???

Thanks.

Andy

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