Comment 0 for bug 1593752

Shaker north-south scenario (openstack/perf_l3_north_south) measures throughput between 2 instances located in different networks plugged into different routers. The source instance has private address only, the destination is accessed via floating IP. Measured throughput is around 10s of kilobytes instead of Gbs.

Description of the environment: MOS 9, RC2, Neutron ML2, VxLAN, DVR, 6-nodes cluster.

The same can be reproduced manually with iperf3. The throughput between instance with fip and another instance with fip is good.

Steps to reproduce: run Shaker openstack/perf_l3_north_south scenario

Expected results: the throughput should be at least Gb for 1Gb interface

Actual result:
ubuntu@shaker-aompes-master-1:~$ iperf3 -c 172.20.157.25
Connecting to host 172.20.157.25, port 5201
[ 4] local 10.1.0.6 port 57555 connected to 172.20.157.25 port 5201
[ ID] Interval Transfer Bandwidth Retr Cwnd
[ 4] 0.00-1.00 sec 54.6 KBytes 447 Kbits/sec 2 1.37 KBytes
[ 4] 1.00-2.00 sec 0.00 Bytes 0.00 bits/sec 8 9.56 KBytes
[ 4] 2.00-3.00 sec 0.00 Bytes 0.00 bits/sec 0 9.56 KBytes

Reproducibility: always

Workaround: n/a

Impact: barely no network connection from instance