Can not rejoin cluster after connect sbd

Dear expert,
I’m newbie with Linux.
I get stuck with when I try to rejoin the cluster after I reconnect sbd and change the Ip Adress
the message announced that " cluster.join: Cannot see peer node “hostname”, please check the communication IP.
In fact that, I try to ping and connect SSH to node 1, everything is ok.
any suggest, or any any idea that I can fix it.
Have a nice day!
Thanks for reading my post