WebLogic: No known valid port for Default[t3]: 7001, No available router to destination.

if you get a funny error like:

The Message-Driven EJB failed while creating a JMS Connection ... java.io.IOException: No known valid port for: 'Default[t3]:t3(t3):169.133.134.123:7001:null ... No available router to destination.

check Oracle Support document "JMS Servers Fail To Communicate via T3 in WebLogic Server (WLS): "No available router to destination" (Doc ID 948192.1)", it could be that you should declare t3s as default protocol in the config.xml section for the server.