[Bug 1153364] Re: trouble with guest network connectivity when host is using a bonded interface

[Serge Hallyn]

> ping aurora
> PING aurora.example.com (192.168.1.70): 56 data bytes
> 64 bytes from 192.168.1.70: icmp_seq=0 ttl=64 time=0.466 ms
> 92 bytes from xenon.example.com (192.168.1.60): Redirect Host(New addr: 192.168.1.70)
> Vr HL TOS  Len   ID Flg  off TTL Pro  cks      Src      Dst
>  4  5  00 0054 7b83   0 0000  3f  01 7c14 192.168.1.123  192.168.1.70 

This is a bit of a long shot, but is it possible this is the same error
as

https://bugs.launchpad.net/ubuntu/+source/nova/+bug/1029430

?  That bug and all its solutions/workarounds seem to be only about dhcp,
but it may be causing general udp checksum problems.

You might at host boot, as per comment #16 (but doing all ports), try

[ -e /dev/vhost-net ] && \
sudo iptables -t mangle -A POSTROUTING -o br0 -p udp -m udp -j CHECKSUM --checksum-fill

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https://bugs.launchpad.net/bugs/1153364

Title:
  trouble with guest network connectivity when host is using a bonded
  interface

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