[c-nsp] Link aggregation question

Phil Bedard philxor at gmail.com
Mon May 28 11:54:50 EDT 2012


According to this doc you can set the switch to use dst mac, src mac, or a combination of the two on the 3560. 

http://www.cisco.com/en/US/tech/tk389/tk213/technologies_tech_note09186a0080094714.shtml


On May 28, 2012, at 10:38 AM, Mike <mike-cisconsplist at tiedyenetworks.com> wrote:

> 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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