Brian E Carpenter <brian.e.carpenter@xxxxxxxxx> writes: > "By in large, this flow label changing behaviour has been traced to > IPv6 supporting CPE/firewalls, which change the flow label between the > initial syn and the ack." > > Broken middleboxes can prevent anything from working properly. With my <operator> hat on, we have indeed run into a problem where a small (~ 2%) of IPv6 TCP sessions to us were failing due to FlowLabels being used in ECMP hashing. We had to turn off the usage of FlowLabel in the hashing because of even a small real world impact to end-users. -- Wes Hardaker USC/ISI
