netdev - Re: non-OVS based vxlan config broken on 3.19-rc ?!

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Message-ID: <54B7B086.7080208@redhat.com>
Date:	Thu, 15 Jan 2015 10:20:22 -0200
From:	Marcelo Ricardo Leitner <mleitner@...hat.com>
To:	Or Gerlitz <gerlitz.or@...il.com>, thomas Graf <tgraf@...g.ch>
CC:	Or Gerlitz <ogerlitz@...lanox.com>,
	tom Herbert <therbert@...gle.com>,
	Jesse Gross <jesse@...ira.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: non-OVS based vxlan config broken on 3.19-rc ?!

On 14-01-2015 18:55, Or Gerlitz wrote:
> On Wed, Jan 14, 2015 at 5:52 PM, thomas Graf <tgraf@...g.ch> wrote:
>> On 01/14/15 at 05:18pm, Or Gerlitz wrote:
>>> Guys, just realized that non-OVS based vxlan config is broken with
>>> 3.19-rc... I see that it works for me on 3.18.2 and breaks on 3.19-rc3
>>> (Linus tree). Tested over mlx4 (both offloaded and non offloaded modes) and
>>> igb, see below the simplest form I can see it breaks on 3.19-rcand works on
>>> 3.18
>>>
>>> Looking on tcpdump and stats, the arp reply arrives to the 3.19-rc host NIC
>>> driver but is dropped along the stack beforehanded to the vxlan driver, not
>>> sure where and why...
>>
>> As additional data point: I tested the VXLAN-GBP with iproute2 based tunnels
>> on net-next and that works fine. Driver used was a e1000 in KVM.
>
>
> mm, so net-next.git (3.20 candidate code) and 3.18 works, but @ least
> for me 3.19-rc doesn't - could you check if net.git works for you on
> iproute2 based tunnels in that env? just vxlan is enough.
>

Hi,

Just tested your commands on two virtual machines running virtio (same host), 
Linus' commit fb005c47f7b72edac50342b6af490af09854381b (which is 3.19.0-rc4+) 
and it worked just fine for me. That is, ping went through both ways without 
issues.

I'll still try with net.git..

Did you try dropwatch? If you add a neigh entry for the remote peer and ping 
flood it, you may spot it on dropwatch.

   Marcelo

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