Bug#729567: Debian bug #726676: linux-image-3.10-3-amd64: TCP packet loss when using proxy ARP IP addresses

[Andris Kalnozols <andris@hpl.hp.com>]

Package: src:linux
Version: 3.10.11-1

Please close bug report #726676 as the observed problem had nothing to
do with proxy-arp.  The correct diagnosis was provided by John Hughes
who filed bug report #729567.

When I used ethtool to turn off the "generic-receive-offload" (GRO)"
network device option, the problem with OpenVPN TCP clients having
their sessions stall disappeared immediately.  The problem is bypassed
by having the following statements  at the end of `/etc/network/interfaces':

  post-up ethtool -K eth0 gro off
  post-up ethtool -K eth1 gro off

Since my OpenVPN server runs  on a bastion host, I found that I had to
disable GRO on both network interfaces to fix the problem.  Also, disabling
GRO on the OpenVPN server's tunnel devices had no effect in fixing the
issue.

Thanks to Mr. Hughes for his diagnostic work and for taking the time
to notify me.

------
Andris Kalnozols