Ubuntu
qemu-kvm package

  1. Bug #997978
  2. Comment #131

Comment 131 for bug 997978

Revision history for this message
Øyvind Jelstad (oyvind-2) wrote :

Looks like I have this problem on 12.04.1 LTS with kernel 3.2.0-67-generic #101-Ubuntu SMP Tue Jul 15 17:46:11 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux on the host and Debian Wheezy on the guest (SMP Debian 3.2.60-1+deb7u3 x86_64 GNU/Linux)

The guest will occationally loose connection with other hosts on the LAN, and their entries in the arp table on the guest are gone.
Only sporadic forwarding of arp replies on the host back to the guest seem to be the problem.

Dumping arp request (triggered by a ping from guest) on the bridge external (real) interface on the host catches both requests and replies, while the same dump on vnet0 misses replies for minutes until a reply suddeny comes through and reestablishes connection.

I am using virtio interface. It makes no difference if I change to e1000. FW policy is ACCEPT on all tables.