Description of problem: Mutlicast between virtual KVM hosts gets dropped after a short period Version-Release number of selected component (if applicable): Fedora 18 Name : qemu-kvm Epoch : 2 Version : 1.2.2 Release : 6.fc18 Name : libvirt Version : 0.10.2.3 Release : 1.fc18 How reproducible: Instal omping on both virtual hosts. A low number of ping wil turn out OK, but giving a higher number, the multicast packet loss gets huge: omping <remote ip> local ip> -c500 (on both hosts) 192.168.1.211 : unicast, xmt/rcv/%loss = 500/500/0%, min/avg/max/std-dev = 0.330/0.610/0.789/0.064 192.168.1.211 : multicast, xmt/rcv/%loss = 500/268/46%, min/avg/max/std-dev = 0.416/0.635/0.921/0.066 After turning off "multicast snooping", the packet loss will disappear: echo 0 > /sys/class/net/virbr0/bridge/multicast_snooping omping <remote ip> local ip> -c500 192.168.1.212 : unicast, xmt/rcv/%loss = 500/500/0%, min/avg/max/std-dev = 0.353/0.623/0.944/0.075 192.168.1.212 : multicast, xmt/rcv/%loss = 500/500/0%, min/avg/max/std-dev = 0.356/0.642/0.964/0.078 Steps to Reproduce: 1. install Fedora 18 + KVM 2. install 2 virtual (fedora) host and omping 3. start multicast test between virtual host using omping Actual results: Huge packet loss after apr. 200 ping. Expected results: 0% packet loss Additional info:
The bridge is set up by libvirt, changing component.
I believe this is a duplicate of 880035, please reopen if you disagree. *** This bug has been marked as a duplicate of bug 880035 ***