[Chilli] Multiple Instances of Coova

[Thomas Liske]

Hi,

802.1Q adds the vlan tagging outside the 1500 payload. If a switch is 
configured with a trunk port to a chilli host, the frames inside the 
vlans have a MTU of 1500. The problem on this approach is that chilli 
uses a ethernet port running in "access mode" (= no vlan support) from 
the kernel view and implements 802.1Q in userspace. To behave correctly 
chilli has to raise the MTU to support a max MTU of 1500 inside the 
vlans IMHO.


Regards,
Thomas


David Bird wrote:
> Sure... though, you still might run into fragmentation elsewhere in the
> network..
> 
> On Wed, 2009-11-18 at 09:52 +0100, Wichert Akkerman wrote:
>> On 11/18/09 09:47 , David Bird wrote:
>>> Btw, you'd want to use something like --tcpmss 1450 with ieee8021q since
>>> an MTU of 1500 can't be maintained with the extra header length.
>> Or perhaps change the MTU of the ethernet interface to 1550 to 
>> accomodate the VLAN tag?
>>
>> Wichert.
>>
>> _______________________________________________
>> Chilli mailing list
>> Chilli at coova.org
>> http://lists.coova.org/cgi-bin/mailman/listinfo/chilli
> 
> 
> _______________________________________________
> Chilli mailing list
> Chilli at coova.org
> http://lists.coova.org/cgi-bin/mailman/listinfo/chilli
> 


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Netzwerk- und System-Design


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