Problems With OVN


I’m having a problem where one of my OVN networks can not reach the outside world.

It can:

  1. Reach other instances within the network on different hosts.
  2. It can reach it’s own gateway

It can’t reach anything past the gateway.

lxc network info external-services --target=labhost-02 --project external-services
Name: external-services
MAC address: 00:16:3e:8b:a9:bf
MTU: 1442
State: up
Type: broadcast

IP addresses:
  inet (link)
  inet6	fd42:c416:702d:be56::1/64 (link)

Network usage:
  Bytes received: 0B
  Bytes sent: 0B
  Packets received: 0
  Packets sent: 0


IP Routes

ip route
default via dev eth0 proto dhcp src metric 100 dev wg0 proto kernel scope link src via dev eth0 proto dhcp src metric 100 via dev eth0 proto dhcp src metric 100 dev eth0 proto kernel scope link src metric 100 dev eth0 proto dhcp scope link src metric 100

The Network

  bridge.mtu: "1442"
  ipv4.nat: "false"
  ipv6.address: fd42:c416:702d:be56::1/64
  ipv6.nat: "true"
  network: UPLINK 2600:8802:b00:1602:216:3eff:fe8b:a9bf
description: ""
name: external-services
type: ovn
- /1.0/instances/fair-pangolin?project=external-services
- /1.0/instances/vpn-server?project=external-services
managed: true
status: Created
- labhost-01
- labhost-02
- labhost-03

What are some common troubleshooting tips for trying to troubleshoot ovn and lxd?

Thank you

On the host can you ping

Please can you show lxc network show UPLINK?

Also I notice you have ipv4.nat: "false" in your OVN network? This means that the egress packets will be hitting the uplink network without being SNATted to the address.

How have you planned/configured for the uplink network to return packets from the address back to the OVN router (via

Hey @tomp I ended up losing my ovn-cluster and needing to re-create my networks and the problem hasn’t arisen.

Thanks for the follow up

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