Hi, ----- Original Message -----
From: "Frank Wall" <fw@moov.de> To: users@ovirt.org Sent: Friday, September 6, 2013 8:05:21 PM Subject: [Users] Guest to guest multicast
Hi,
I'm trying to use the VRRP protocol between two VMs, but the multicast traffic never gets through. On the oVirt host I can see the VRRP advertisements coming in for both VMs:
aio:~# tcpdump -n -X -i vnet3 net 224.0.0.0/4 listening on vnet3, link-type EN10MB (Ethernet), capture size 65535 bytes 18:58:31.841220 IP 10.1.2.3 > 224.0.0.18: VRRPv2, Advertisement, vrid 1, prio 0, authtype none, intvl 1s, length 36
aio:~# tcpdump -n -X -i vnet8 net 224.0.0.0/4 listening on vnet8, link-type EN10MB (Ethernet), capture size 65535 bytes 19:02:26.907054 IP 10.1.2.4 > 224.0.0.18: VRRPv2, Advertisement, vrid 1, prio 100, authtype none, intvl 1s, length 36
What is required to enable guest-to-guest multicast communication on an oVirt node?
Are they on the same virtual network/bridge? Did you check iptables? You can add a rule to log such things and see if it was iptables that blocked it (or something else). Check both host and VMs. -- Didi