Port Channel Exchange Based Load Balancing

Unanswered Question
Jan 28th, 2008

Hi all.

With exchange-based load balancing, how is the link within the port-channel selected for each exchange? Is it round robin or is there something more intelligent?

We are using FCIP with two links with diverse routes. So the port-channel has 2 members, one with a rtt latency of 4ms and one with 14ms. Will half of the frames encur the 14ms latency or will more traffic use the lower-latency link?

Any help appreciated.



I have this problem too.
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mkoch Mon, 01/28/2008 - 04:10

the port channel does not change the load balancing behaviour, it just makes your network more resilient to topology changes.

So the load balancing would be exchange-based (src/dest/oxid) or flow based (src/dest). This parameter is configurable per VSAN.

The latency is not a parameter anywhere.




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