I configured load balancing across unequal paths (EIGRP protocol) with variance 2.
Actually I have two connections to a remote router (64kbps and 256kbps). At the beginning I had only the 256Kbps working and I have latency via ping 19-20ms. After I configured load balancing (variance 2, load sharing 19 for 256Kbps link and 8 for 64Kbps) I have a latency via ping 30-32ms.
At the beginning I was surprised then I thought the following:
Lets say that a packet of 256Kbs has to travel to the remote router.
Scenario first(only 256Kbps is up)
The latency will be 1 second
Scenario 2(only 64Kbps is up)
Latency is 4 seconds
Scenario 3(both links are up , with 66% for 256Kbps and 34% for 64Kbps)
So we have max latency for 256kbps(data is 170bits) <1sec
For 64kbps link (data is 86 bit) around 1,5 seconds. So in total I will need 1,5seconds for the packet to reach its target.!!!!
Conclusion. If I have only the 256Kbps link I have better bandwidth than use load balancing on both links.
Is that normal? If yes what's the purpose of using load balancing accross unequal-cost paths?
Thanks a lot