Cannot discover each other in double docker on different host

[ruoruoniao]

Is there an already existing issue for this?

• I have searched the existing issues

Expected behavior

Communicate as usual.

Current behavior

Two program cannot discover others, also cannot receive any data.

Steps to reproduce

Two program (ddshelloworld) is running in two dockers, and each docker is in a independent virtual machine.
Current structure is about this.

Those two dockers can ping to each other by using docker swarm, like this.

But those two program cannot discover others, also cannot receive any data.

Fast DDS version/commit

v2.9.1

Platform/Architecture

Ubuntu Focal 20.04 amd64

Transport layer

Default configuration, UDPv4 & SHM

Additional context

No response

XML configuration file

No response

Relevant log output

No response

Network traffic capture

No response

[ruoruoniao]

Up to date, I had already been try to remove the network 172.17.x.x, but it also cannot community to others.

[JLBuenoLopez]

DDS Simple Discovery leverages multicast as per the DDS specification. Have you checked that multicast is enabled with docker swarm mode? If your network architecture is known beforehand you might consider using Initial Peers instead of relying on multicast.

[ruoruoniao]

My swarm address is 10.0.1.x, it's flag has a multicast lable. Is that means multicast is enabled?

[JLBuenoLopez]

Sorry, I cannot help you with your network configuration. You might consider contacting Fast DDS commercial support team to know about the support options available. I am also transferring this ticket to the support discussion forum as per Fast DDS CONTRIBUTING guidelines

[MagicKim]

@ruoruoniao Have you solved this problem?