Hello, I had already filed similar panics a month ago. Today i upgraded to 3.2.16 and nothing seems to be changed (and i don't see anything related in .17). The server (a Dell R410 with a couple of bnx2 ethernet cards) has two bridges onboard. Each bridge is connected to a different switch and has 2 uses: - one bridge is connecting an internal network and the KVM hosts that run on the same machine - one bridge connects the server to the public network along with another bunch of kvm servers whose interfaces bridges The bug can be easily triggered adding or removing (with heartbeat) a virtual address (br0:1, for example) . Is there any known fix or patch ? Thanks Massimo