bce discard frame w/o leading ethernet header and polling (broken?) 7.1-beta2

security security at jim-liesl.org
Tue Nov 18 13:15:48 PST 2008

Jung-uk Kim wrote:
> On Tuesday 18 November 2008 01:01 pm, security wrote:
>> I'm building a WAN emulation box based on 7.1-beta2-ipfw and
>> dummynet. The config is basically a router-on-a-stick.  The server
>> (FBSD rtr) has two nics which connect to two different switches,
>> but both switch ports are in the same untagged interconnected vlan.
>>  All the other test boxes in the network are also in the same vlan,
>> but broken into different nets.  The different nets are spread
>> across the two nics as primary and alias ip address in different
>> nets.  I've been getting "bursts" (maybe 8-20 at a time) of the
>> discard frame messages.  Mostly on bce1 but I've seen them on bce0
>> also. bce1 is probably the busier of the 2 currently. As a shot in
>> the dark, I disabled polling system wide and the messages seemed to
>> have stopped.
> Please try the latest driver from RELENG_7.  The following commit 
> seems interesting:
> http://svn.freebsd.org/viewvc/base?view=revision&revision=184826
> Jung-uk Kim
Thanks, you're right it does.  I noticed he disabled polling as I had
done.  There are enough other interesting bits that i'll try the driver.


More information about the freebsd-net mailing list