em(4) VLAN + PROMISC still doesn't work with latest CVS version

[Iasen Kostov]

Iasen Kostov wrote:

> Iasen Kostov wrote:
>
>> Tony Ackerman wrote:
>>
>>> What is the purpose of putting em1 in promiscuous mode below? Is
>>> the required or did you just notice the issue with this configuration?
>>>
>>> There was a change added some months ago in order to allow the 
>>> bridging of vlans.  In order for vlan briding to work the interface
>>> had to have vlan tagging/stripping disabled when promisc mode is
>>> invoked (which is how bridge works).  The side effect is that now
>>> tcpdump which puts the interface in promisc mode by default will
>>> in effect cripple the interface.
>>>
>>> However, if "tcpdump -p" does not put the interface in promisc mode
>>> and it works just fine.
>>>  
>>>
>> What about bridge over VLAN ? If you can make a bridge over vlans 
>> without putting
>> interfaces in promisc mode I won't have some of the problems - but I 
>> don't think it is possible ...
>> More, if you forget to put -p after tcpdump (or trafshow) in ssh 
>> session ... BOOM.
>> At least until sshd times out and drops the session and kills tcpdump 
>> but of course this is rather
>> annoying :). And some traffic accounters go into background so they 
>> won't die with the
>> ssh session making you say large amount of not so nice words before 
>> calling the support
>> asking them to reboot the machine :).
>>
>>> On Tue, Dec 07, 2004 at 04:22:16PM +0200, Iasen Kostov wrote:
>>>  
>>>
>>>> Iasen Kostov wrote:
>>>>
>>>>  
>>>>
>>>>> Robert Watson wrote:
>>>>>
>>>>>    
>>>>>
>>>>>> On Sat, 27 Nov 2004, Kevin Day wrote:
>>>>>>
>>>>>>
>>>>>>
>>>>>>      
>>>>>>
>>>>>>> I recently upgraded to 5.3 on a system, and manually upgraded
>>>>>>> src/sys/dev/em/* to the latest RELENG_5 versions. (1.44.2.4 of 
>>>>>>> if_em.c)           
>>>>>>
>>>>>>
>>>>>> I'm able to reproduce problems using the below configuration is 
>>>>>> 6.x also,
>>>>>> and am investigating.  Thanks for the report, hope to get back to 
>>>>>> you
>>>>>> shortly with something concrete.
>>>>>>
>>>>>> Robert N M Watson             FreeBSD Core Team, TrustedBSD Projects
>>>>>> robert at fledge.watson.org      Principal Research Scientist, 
>>>>>> McAfee Research
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>      
>>>>>>
>>>>>>> While the VLAN side of things works better than the stock 5.3 
>>>>>>> version,
>>>>>>> there still is this problem:
>>>>>>>
>>>>>>> ifconfig vlan1 create
>>>>>>> ifconfig vlan1  vlan 1    vlandev em1 link0
>>>>>>> ifconfig vlan2 create
>>>>>>> ifconfig vlan2  vlan 2    vlandev em1 link0
>>>>>>> ifconfig vlan3 create
>>>>>>> ifconfig vlan3  vlan 3    vlandev em1 link0
>>>>>>>
>>>>>>> ifconfig vlan1 inet 192.aaa.bbb.129 netmask 255.255.255.0
>>>>>>> ifconfig vlan2 inet 64.ccc.ddd.61 netmask 255.255.255.192
>>>>>>> ifconfig vlan3 inet 64.eee.fff.61 netmask 255.255.255.192
>>>>>>>
>>>>>>> ifconfig em1 up
>>>>>>> ifconfig em1 promisc
>>>>>>>
>>>>>>> If I do this, vlan1 and vlan3 work fine. Vlan2 can receive 
>>>>>>> packets, but anything sent out vlan2 doesn't seem to be heard by 
>>>>>>> any foreign hosts. Setting "ifconfig em1 -promisc" makes all 
>>>>>>> vlans work properly.
>>>>>>>
>>>>>>> This is better than the stock 5.3 version of em(4) where none of 
>>>>>>> the vlans worked, but something still isn't right.
>>>>>>>
>>>>>>> Is this a known problem still or am I just doing something wrong?
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>         
>>>>>>
>>>>>>
>>>>> Saddly I can just confirm that :(
>>>>>
>>>>>  regards
>>>>>
>>>>> _______________________________________________
>>>>> freebsd-net at freebsd.org mailing list
>>>>> http://lists.freebsd.org/mailman/listinfo/freebsd-net
>>>>> To unsubscribe, send any mail to 
>>>>> "freebsd-net-unsubscribe at freebsd.org"
>>>>>
>>>>>     
>>>>
>>>>
>>>>   Is there an update on this case or I should find a way to disable 
>>>> all hw "things" in the driver ?:) (because things are getting hot 
>>>> here :).
>>>>
>>>>   regards
>>>>   
>>>
>>>
>>>
>>>  
>>>
>>
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>>
> Funny, it works when I load the module from loader.conf ... I mean 
> everything - bridge, tcpdump. Network adapter is changed too
> but the model is the same. I realy didn't get it :(.
>
More fun it now works flawlessly ... wherever you load the if_em and I'm 
100% sure that it didn't work with old adapter.
I don't know I hope it was some kind ot hardware problem.