[ovs-discuss] [Bug #1378] xenserver: Enable ARP filtering to work around xhad bug.

Ben Pfaff blp at nicira.com
Tue Jul 28 22:47:04 UTC 2009

Justin Pettit <jpettit at nicira.com> writes:

> On Jul 28, 2009, at 3:25 PM, Ben Pfaff wrote:
>> +if grep -F net.ipv4.conf.all.arp_filter >/dev/null 2>&1; then :; else
> I think you're missing the filename in the grep command, so it'll hang.

Oops.  Thank you!

>> +# This is a workaround for a bug in xhad, which binds to a particular
>> +# Ethernet device, which in turn causes ICMP port unreachable
>> messages
>> +# if packets are received are on the wrong interface, which in turn
>> +# can happen if we send out ARP replies on every interface (as Linux
>> +# does by default) instead of just on the interface that has the IP
>> +# address being ARPed for, which this sysctl setting in turn works
>> +# around.
> While I agree that xhad's behavior isn't great, I'm not sure they'd
> classify it as a bug.  :-)  Maybe a "peculiarity"...

I reworded it as an "issue" and pushed this (at your request).

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