setting promisc mode kills vlans on devices with hwtagging (em,
tbyte at OTEL.net
Thu Nov 25 07:19:10 PST 2004
Robert Watson wrote:
>On Tue, 23 Nov 2004, Robert Watson wrote:
>>On Tue, 23 Nov 2004, Iasen Kostov wrote:
>>>if you setup a vlan devices with parent one of emX or reX (this what I
>>>have at the moment) which has hardware vlan tagging just try to run
>>>tcpdump (without -p) and the vlans will die :). That doesn't happen with
>>>parent devices not supporting hwtagging. And this totally excludes
>>>possibility to run a bridge over vlans with parent device which support
>>>hwtaggs. And something else was observed with re driver - it is
>>>impossible to disable hwtaggs by -vlanhwtag neither you can disable vlan
>>I recently fixed this bug in if_em in HEAD, and will be merging that
>>back to RELENG_5 shortly. We plan to also merge the change to
>>RELENG_5_3 as an errata patch fix. It does not surprise me that if_re
>>has a similar bug; I'll look at abstracting the solution in the next
>I've now merged the fix to RELENG_5 from HEAD:
> Checking in if_em.c;
> /home/ncvs/src/sys/dev/em/if_em.c,v <-- if_em.c
> new revision: 184.108.40.206; previous revision: 220.127.116.11
> Checking in if_em.h;
> /home/ncvs/src/sys/dev/em/if_em.h,v <-- if_em.h
> new revision: 18.104.22.168; previous revision: 22.214.171.124
>I'll take a look at if_re shortly.
>Robert N M Watson FreeBSD Core Team, TrustedBSD Projects
>robert at fledge.watson.org Principal Research Scientist, McAfee Research
>freebsd-hackers at freebsd.org mailing list
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My if_em.c is 126.96.36.199 and if_em.h is 188.8.131.52 and the same happens again...
I ran ping throu vlan device on one console and then start tcpdump on another console
and the ping stops.
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