virtio-net broken for Linux guest?

[Tommy Pham]

Hi,

Is anyone having problem using virtio NICs for the Linux guest VMs (Ubuntu
12.10, CentOS 6.4, and Fedora 18)?  My guests can ping any domain (
www.yahoo.com, www.google.com, etc) fine without any issues.  However, when
I do system updates (ie yum repolist, yum update, apt-get update, apt-get
upgrade), it doesn't get out to the internet.  But when I changed the NIC
to e1000, everything works fine.  I think the problem is with Linux
implementation of virtio-net as guest because the same environment setup
works fine for FreeBSD 8.x.

TIA,
Tommy
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