Capwap Mailing List: Re: Proposed resolution for issue 100. Treatment ofwirelessmanagement frames.

[sujay (sujayg]

Title: Message

Mike,

 

I would prefer encapsulating the 802.11 mgt frames as capwap data and send to AC.

For , such binding specific mgt frames can be easily carried and understood

by the AC.

 

There is no need for CAPWAP taking an extra operation of converting it into an

equivalent control message.

 

But then again as it is in the data channel and the Ack for it is carried implicitly in

the control channel (add mobile message) OR as Response message(Association response),

 in the data channel, retransmission mechanism implementations should be

 made aware of both possibilities.

 

Least it MAY cause inter-op issues.

 

>>

From Section 11.1.2

 

While the MAC is terminated on the WTP, it is necessary for the AC to......

WTP MUST forward the IEEE 802.11 Association Requests to the AC, and

the AC " MAY " reply with a failed Association Response if it deems it

necessary.

 

 

Regds,
Sujay G
My Location;
http://maps.google.com/maps?ll=14.626109,76.959229&spn=4.724852,7.525085&t=h&hl=en


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-----Original Message-----
From: Michael Montemurro [mailto:montemurro.michael [at] gmail.com]
Sent: Monday, June 05, 2006 5:52 AM
To: Abhijit Choudhury
Cc: capwap
Subject: Re: [Capwap] Proposed resolution for issue 100. Treatment ofwirelessmanagement frames.

Actually, I need to make one clarification. If we decide to use CAPWAP data encapsulation, IEEE 802.11 management frames passed from the WTP to the AC in local MAC mode. That would mean there would be three possible forms of processing at the WTP:

data frames - bridge locally or tunneled to the AC - CAPWAP data

802.11 management frames - encapulated as CAPWAP data and transmitted to the AC

CAPWAP control frames.

 

I think it sounds cleaner to encapsulate management frames and transmit them from the WTP to the AC as control frames. But I'm willing to go whichever way the group decides.

 

Cheers,

 

Mike

 

On 6/3/06, Michael Montemurro <montemurro.michael [at] gmail.com> wrote:

Is there consensus that radio techology specific management frames should be carried as CAPWAP data frames?

 

Thanks,

 

Mike

 

On 6/3/06, Abhijit Choudhury <Abhijit [at] sinett.com > wrote:

Mike,

I'm not sure this make sense.

 

The CAPWAP control channel is for "control and

provisioning" messages between the AC and the WTP.

Per-client information arriving at the WTP should

be sent in the data channel as it is all data to

the AC, and has nothing to do with "control and

provisioning" of the WTP. 

 

There could be radio technology specific information

(e.g. RSSI/SNR) that are collected on a per-client

basis at the AC, and separating out some of the

messages into a separate channel will lead to either

erroneous accounting or more complicated logic that

looks at both channels on a packet-by-packet basis.

All packets sent by a client should come up

the same channel (the data channel).

 

As for security for management frames, 802.11w

should take care of that.

 

Thanks,

   Abhijit

-----Original Message-----
From: Michael Montemurro [mailto: montemurro.michael [at] gmail.com]
Sent: Saturday, June 03, 2006 12:39 PM
To: capwap
Subject: [Capwap] Proposed resolution for issue 100. Treatment of wirelessmanagement frames.

Here is my proposed resolution to issue 100:

- Fix the default priority settings in section 11.6 to the values used in section 4.3.3.

- Change the last paragraph in section 4.3 to state that radio technology specific management frames are treated as CAPWAP control messages. It makes sense because control frames are protected.

Does this make sense?

Cheers,

Mike