[VLAN] 802.1Q ARP frame size?

[Ben Greear]

James Harper wrote:
>> John C. Lin wrote:
>>> (Sorry, if this is a FAQ)
>>>
>>> I noticed that the 802.1Q ARP frame size generated by the Linux
> driver
>>> (V1.8) is only 64 octets (not 68 octets).
>>>
>>> It seems the minimum frame size for 802.1Q is 68 octets.
>> The 64-octets is an ethernet physical level issue, not a VLAN issue,
> so
>> there is no need to pad the frame to 68 bytes.
>>
> 
> So what happens when a switch untags the vlan tag and sends the untagged
> packet out a port? Is it the responsibility of the switch to then pad
> the packet? Or does this just happen automatically anyway?

It's the switches duty..and most NIC's hardware will do the padding..I 
assume switch hardware can easily do the same.

Ben

> 
> James
> 
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-- 
Ben Greear <greearb at candelatech.com>
Candela Technologies Inc  http://www.candelatech.com