Install Jitsi with Multiple Videobridge2

I have installed Jitsi-Meet setup from instructions given in Quick Install.
First all in one setup is woking fine.

I also installed a new videobridge2 only in another separate system and connect the second server to main jicofo server by LAN (without internet access) on private IP. I configured both servers so that i am able to find second server connection in jicofo log of first server, but when i start any conference and connect other participants it show error “Unfortunately something went wrong” and starts reconnecting.

  • The Second server don’t have internet access and is directly connected to main server via a switch.
    Now my question is: whether internet connection is required in all videobridges and how?