Avalanche: Why is URL response time for IPv6 traffic unusually high?

• URL response time for IPv6 is not as expected.

• This is a configuration issue. • Go to Client>Network tab and change the default value for Delayed ACK Bytes from 2920 to 2880. • If you load the performance tests for IPv6 this is already changed but if you start from an empty test you have to be careful to change it yourself. • Otherwise you have to disable the Delayed ACKs. • What is happening in IPv6 tests when you have Delayed ACKs, one of the two criteria have to be met to send the ACK. One criteria is to wait 200ms and the other criteria is to have two segments of 2920 bytes. • But since the MSS for IPv6 is 1440, then two segments make 2880. But since your criteria is set to 2920, then the ACK waits 200ms to be sent.