FreeBSD 9.1 ix driver vlan problem

Rumen Telbizov telbizov at gmail.com
Wed Sep 25 18:30:04 UTC 2013


Jack,

Can you reproduce this problem yourself? Does it make sense to experience
this behavior?

Thanks,
Rumen Telbizov


On Wed, Sep 25, 2013 at 11:23 AM, Jack Vogel <jfvogel at gmail.com> wrote:

>
> Thanks for the investigation, I guess what I'm wondering the most right
> now is if the patch from
> Oleg is a good change in general, so any others that can test and give me
> results would be appreciated.
>
> Thanks,
>
> Jack
>
> On Wed, Sep 25, 2013 at 11:14 AM, Rumen Telbizov <telbizov at gmail.com>wrote:
>
>> Hi Jack,
>>
>> Thanks for the suggestions and looking into this.
>> Here are a few additional bits of information that you requested:
>>
>> 1. We did disable spanning tree on the switch port and the result of that
>> is that basically now creating/destroying a vlan on the ix interface makes
>> it freeze for about 3 seconds from previously 6.
>> 2. I brought manually the physical interface down (ifconfig ix1 down) and
>> then up and measured the time it took for the interface on the switch to
>> show as up - and that was again about 3 seconds. So basically it seems to
>> me like that's how long it normally takes for a link to be negotiated.
>> 3. We tweaked a setting on the switch which instructs the port to be down
>> for 5 seconds before it's considered down. Then repeated the test again and
>> the result was that now the "freeze" period got reduced to 1.5 seconds and
>> no ping packets were lost but one of the packets returned with 1500 ms
>> delay. My guess on this one is that since the switch ignored the flapping
>> of the interface, bringing it back up was much faster. So it does mask the
>> problem somewhat but it is still there - the interface seems to go down.
>>
>> Next steps:
>> 1. I will reinstall this machine with the latest 9.2 and repeat the tests
>> see what happens.
>> 2. If the previous one fails - I'll try the patch that Oleg sent. Thanks
>> a lot for providing that patch.
>>
>> I'll update this list with more findings.
>>
>> Thank you,
>> Rumen Telbizov
>>
>>
>>
>> On Wed, Sep 25, 2013 at 10:01 AM, Jack Vogel <jfvogel at gmail.com> wrote:
>>
>>> Rumen,
>>>
>>> I'd like to know if you can check the spanning tree setting as Daniel
>>> mentioned and if that solves it,
>>> I do know that that can cause considerable delay in link transitions.
>>> Also, can you see if you see
>>> different behavior by going to the latest 9.2 bits?
>>>
>>> Oleg thanks for the patch, I will check it out and have my validation
>>> engineer do some tests and
>>> we'll get to the bottom of this.
>>>
>>> Jack
>>>
>>>
>>>
>>> On Wed, Sep 25, 2013 at 9:57 AM, Rumen Telbizov <telbizov at gmail.com>wrote:
>>>
>>>> Thanks for the patch Oleg.
>>>> I'll give it a try but I would also like to hear back from Jack.
>>>>
>>>> Oleg, can you confirm that you're experiencing the exact same
>>>> problem/behavior? What kind of switch is connected on the other end?
>>>>
>>>> Thanks,
>>>> Rumen Telbizov
>>>>
>>>>
>>>> On Wed, Sep 25, 2013 at 9:40 AM, Oleg Bulyzhin <oleg at freebsd.org>
>>>> wrote:
>>>>
>>>> >
>>>> > I'm running my ixgbe servers with attached patch.
>>>> > It does solve this problem for me.
>>>> >
>>>> > --
>>>> > Oleg.
>>>> >
>>>> > ================================================================
>>>> > === Oleg Bulyzhin -- OBUL-RIPN -- OBUL-RIPE -- oleg at rinet.ru ===
>>>> > ================================================================
>>>> >
>>>> >
>>>>
>>>>
>>>> --
>>>> Rumen Telbizov
>>>>
>>>> Unix Systems Administrator <http://telbizov.com>
>>>> _______________________________________________
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>>>> http://lists.freebsd.org/mailman/listinfo/freebsd-stable
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>>>>
>>>
>>>
>>
>>
>> --
>> Rumen Telbizov
>> Unix Systems Administrator <http://telbizov.com>
>>
>
>


-- 
Rumen Telbizov
Unix Systems Administrator <http://telbizov.com>


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