Fred wrote:

> Note that I am in favor of suggesting that the Flow Label be included in the 
> hash when doing load balancing. It is a no brainer. At worst, it is a no op. 
> But it certainly is never better to exclude it.

Have you looked at the security implications? Suppose that an attacker can 
predict the hash algorithm used by a router. This attacker could then pick 
"interesting" values of the flow ID, to get the flow of traffic directed to 
particular paths, or not. For example, they could systematically but a 
different flow label to each packet to ensure the traffic is spread over all 
available paths.

-- Christian Huitema



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