[j-nsp] Hash algorithms for LAG

[Rafael Rodriguez]

Do you meaning hashing based on layer2, layer3, layer4, and mpls labels? If so, hashing is configurable to any of the above. 

Sent from my iPhone

On Jan 19, 2012, at 11:08, Thomas Eichhorn <te at te3networks.de> wrote:

> Dear all,
> 
> I just had some discussions with our SE about the
> hashing algorithms used in different devices for
> packet distribution on LAG.
> 
> This seems to be a horrible complexe topic, with
> much sensible information behind - the exact algorithm
> seems to be much of a secret.
> 
> I just wonder why, maybe my idea ist just a little
> bit naive, but I hope somebody here can bring some clarification
> into it:
> 
> If I were to implement such a distribution algorithm,
> I would just define a range of bits of the headers,
> and do a modulo (number of member links) with it.
> 
> The range of bits could say: Only from Byte 9 to 20 for
> using the mac-adresses, or a longer part of the header
> if including MPLS-labels.
> 
> Am I completely wrong and there is much more magic
> behind? Has somebody here an deep insight and might
> share it with us?
> 
> Thanks
> Tom
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