Re: network interface cards native vlans support in linux kernel?

[Ben Greear <greearb@xxxxxxxxxxxxxxx>]

Hen, Shmulik wrote:
> Do you mean "native" as in hardware acceleration offloading?
> If that's the case than the 8021q vlan module handshakes with the device driver 
> to check for support and that's it. No need to do any settings on the device. 
> In case there is no offloading support, the vlan module will take care of all 
> stripping/inserting of the vlan tag into place.
> On the other hand, if the device cannot handle 1504 byte packets, it defines itself as 
> "vlan challenged" and you can't use vlan on it at all.
Even challenged ones can work if you set your MTU (and all peer MTUs) to 4 less 
than normal,
ie 1496.

Ben

>

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Ben Greear <greearb@xxxxxxxxxxxxxxx>       <Ben_Greear AT excite.com>
President of Candela Technologies Inc      http://www.candelatech.com
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