FreeBSD 9.1 ix driver vlan problem

Rumen Telbizov telbizov at gmail.com
Wed Sep 25 18:14:41 UTC 2013


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>


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