Symptom
After upgrading cEdge from 17.3.2 to 17.3.4, return packets from Zscalar GRE tunnel are dropped by ZBFW with drop reason "No zone-pair found".
Conditions
Upgrade cEdge from version 17.3.2 to version 17.3.4.
Workaround
Downgrade the cEdge to 17.3.2 version.
Further Problem Description
NA