netdev - RE: rx_dropped packets stop with tcpdump running

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Date:	Wed, 25 Apr 2012 18:19:30 +0000
From:	"Dave, Tushar N" <tushar.n.dave@...el.com>
To:	Marco Berizzi <pupilla@...mail.com>
CC:	"brian.haley@...com" <brian.haley@...com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"eric.dumazet@...il.com" <eric.dumazet@...il.com>,
	Bill Fink <billfink@...dspring.com>
Subject: RE: rx_dropped packets stop with tcpdump running

>-----Original Message-----
>From: Bill Fink [mailto:billfink@...dspring.com]
>Sent: Saturday, April 21, 2012 10:14 PM
>To: Marco Berizzi
>Cc: brian.haley@...com; Dave, Tushar N; netdev@...r.kernel.org;
>eric.dumazet@...il.com
>Subject: Re: rx_dropped packets stop with tcpdump running
>
>On Fri, 20 Apr 2012 17:25:28 +0200, Marco Berizzi wrote:
>
>> brian.haley@...com wrote:
>> > 0x886d or 0x86DD? That second one is IPv6, you might just need to load
>the module.
>>
>> here is the tcpdump:
>>
>> 17:23:25.561398 00:19:99:90:ba:72 > ff:ff:ff:ff:ff:ff, ethertype Unknown
>(0x886d), length 64:
>>         0x0000:  0001 0001 000c 24e2 0001 0019 9990 ba72
>> ......$........r
>>         0x0010:  0000 0500 2304 6364 726f 447b d700 80f8
>....#.cdroD{....
>>         0x0020:  ffff 20d1 b631 80fa ffff e02b fb30 80fa
>.....1.....+.0..
>>         0x0030:  ffff                                     ..
>> 17:23:25.561402 00:19:99:90:ba:73 > ff:ff:ff:ff:ff:ff, ethertype Unknown
>(0x886d), length 64:
>>         0x0000:  0001 0001 000c 24e2 0002 0019 9990 ba72
>> ......$........r
>>         0x0010:  6700 5400 6800 7200 6500 7300 6800 6f00
>g.T.h.r.e.s.h.o.
>>         0x0020:  6c00 6400 0000 3700 3200 0000 0000 0000
>l.d...7.2.......
>>         0x0030:  0000                                     ..
>
>FYI, a Google search for "ethertype 886d" revealed that this is supposedly
>an Intel ANS probe.  See:
>
>  http://fixunix.com/networking/337443-packets-broadcasting-every-
>second.html
>
>						-Bill


Marco,

Looking at the eeprom dump you provided, looks like this issue may get fixed by eeprom update.
Would you please try eeprom update script, fixeep-82574_83.sh , from
https://sourceforge.net/projects/e1000/files/e1000e%20stable/eeprom_fix_82574_or_82583/

-Tushar


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