Hi, all,

On 7/21/2017 10:20 AM, Dan Wing wrote:
> For both points above:   are there cases where the outer header can't provide 
> entropy of the inner headers?  With IPv4, Geneve is carried over UDP and the 
> UDP source port works fine.  With IPv6, Geneve is carried over UDP and the 
> UDP source port and IPv6 flow label can both be used.  Is Geneve carried over 
> something that isn't UDP?  Said another way, do we want to burn Geneve option 
> bits (and MTU) with this entropy information?
This seems a reasonable way forward.

I.e., entropy is useful to ECMP only if routers actually use those bits.
Using existing header fields as they're already interpreted by ECMP
makes more sense than expecting routers to peek into Geneve.

Joe

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