Ubuntu
linux-azure-4.15 package

  1. Bug #1902531
  2. Comment #17

Comment 17 for bug 1902531

Revision history for this message
Mihai (mihaime) wrote (last edit ):

Hi everyone,

I noticed a behavior that I'm not sure if it's to be expected after this patch or not.

SRC VM --> Router VM (with accelerated networking / Mellanox driver) --> 2 tunnel links ECMP --> destination VM

Seems that inside a single flow:
- SYN from SRC VM gets hashed on tunnel link one on Router VM
- ACK (part of the same flow/tcp handshake) gets hashed on tunnel link two on Router VM

RX hash (RSS hash) is on.

I would expect that the hashing and equal load balancing of traffic would happen per flow, not ~ per packet.