[VLAN] QoS mapping

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John T. Kamenik wrote:
> On Aug 3, 2005, at 4:58 PM, Ben Greear wrote:
> 
>> John T. Kamenik wrote:
>>
>>> I have a linux based bridge/router.  On one side is a VLAN  network,  
>>> and on the other an Ethernet network.  The VLAN network  uses the  
>>> user_priority field in the VLAN header to perform  various forms of  
>>> QoS.  The ethernet network does a similar thing  with the IP ToS  
>>> bits.  Is there an easy way to map the ToS bits  to user_priority 
>>> and  visa versa?  And the solution cannot be "use  a Cisco" :).
>>>
>>
>> I'm sure the linux iptables code can somehow do the translation
>> for you...but I don't know the exact details...
>>
> 
> Iptables is what I thought about using first.  However, iptables does  
> not have an understanding of VLANs.  At least not to my knowledge.   
> This means that iptables has no knowledge of the user_priority field  
> and therefore cannot map to or from it.

Get VLAN to map .1q to skb->priority, and get ip tables to map skb->priority
to ToS.  (and vice versa).

Ben

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


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