Comment 0 for bug 1853592

OpenStack Train
OVS 2.12

Linux 5.3 from hwe edge

Connect-X 5 running latest firmware from Mellanox.

Overlay networking configured with VXLAN for project networking.

Some instances successfully DHCP, some don't.

For those that don't:

compute:

11:51:24.926581 IP bond1.2925.node-laveran.maas.58901 > bond1.2925.node-lepaute.maas.4789: VXLAN, flags [I] (0x08), vni 1233
IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from fa:16:3e:e8:59:f3 (oui Unknown), length 300

gateway:

11:50:44.010864 IP bond1.2925.node-laveran.maas.58901 > bond1.2925.node-lepaute.maas.4789: VXLAN, flags [I] (0x08), vni 1233
IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from fa:16:3e:e8:59:f3 (oui Unknown), length 300
11:50:44.011196 IP bond1.2925.node-lepaute.maas.55067 > bond1.2925.node-laveran.maas.4789: VXLAN, flags [I] (0x08), vni 1233
IP 172.16.0.2.bootps > 172.16.2.236.bootpc: BOOTP/DHCP, Reply, length 328

The response is send from the gateway unit to the compute unit, but is never seen in the tcpdump.

If hardware encap is disabled on the two underlying ports/the card, traffic flow is seen and all instances correctly DHCP configure on boot.

 sudo ethtool -K enp3s0f0 hw-tc-offload off
 sudo ethtool -K enp3s0f1 hw-tc-offload off

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-5.3.0-23-generic 5.3.0-23.25~18.04.1
ProcVersionSignature: Ubuntu 5.3.0-23.25~18.04.1-generic 5.3.7
Uname: Linux 5.3.0-23-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.9
Architecture: amd64
Date: Fri Nov 22 12:29:20 2019
ProcEnviron:
 TERM=screen-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=C.UTF-8
 SHELL=/bin/bash
SourcePackage: linux-signed-hwe-edge
UpgradeStatus: No upgrade log present (probably fresh install)