[c-nsp] Link aggregation question

Mike mike-cisconsplist at tiedyenetworks.com
Mon May 28 10:38:24 EDT 2012


Hello,

     I have 2 3560's that have dual links between them. Each link is 
100mbps and I want to aggregate the bandwidth and have failover as well. 
>From my read, most link aggregation will use mac addresses to hash and 
determine which port to forward thru. I belive however I have the worst 
case scenario since traffic IN will have 1500 different source macs but 
1 destination, and traffic OUT will have 1 source mac and 1500 
destination macs. Even worse, this traffic is PPPoE and not IP, 
eliminating any sort of ip based selection criteria. This means, to my 
read anyways, I would have course grained load sharing in 1 direction, 
sort of defeating the point here. I was wondering if anyone had any 
ideas for this platform and suggestions how I might get better 
performance in this situation.

Thanks.

Mike-


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