First of all I have to say Im not familiar with LXC. The developer team setup LXC on a server. There are a bunch of containers there and everything works well.

There is also an internal bridge with the config:

hostname:~$ lxc network show bridgeXXX
  ipv4.address: XXX.XXX.XXX.XXX/24
  ipv4.nat: "true"
  ipv6.address: none
  ipv6.nat: "false"
description: ""
name: bridgeXXX
type: bridge
- /1.0/containers/XXX01
- /1.0/containers/XXX10
managed: true
status: Created
- none

So now the network parts which Im in charge. This LXC Server is connected on a switch which is on subnet CCC.CCC.CCC.CCC/24. Since LXC server attached to the network, when devices make a DHCP request on CCC subnet some times they get IP from LXC bridge subnet XXX/24. And that results the devices to not have internet access. Even the GateWay of XXX/24 is not answering via ICMP.

What can cause this issue? Anyone familiar with LXC can en-light me?

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