Subject: RE: [Capwap] Issue 69: Clarify the contents of the key field inadd/update WLAN

From: "Pat Calhoun (pacalhou)" <[email-masked]>
Date: Fri, 7 Apr 2006 08:43:21 -0700

Seeing no further activity on this issue, I will consider it closed.

Pat Calhoun
CTO, Wireless Networking Business Unit
Cisco Systems

> -----Original Message-----
> From: Pat Calhoun (pacalhou) 
> Sent: Tuesday, March 28, 2006 10:12 AM
> To: capwap
> Subject: [Capwap] Issue 69: Clarify the contents of the key 
> field inadd/update WLAN
> 
> The original comment was:
> >  2. Isn't it likely for the WTP and AC to support more than one 
> > encryption algorithm for the data from the  mobile stations 
> ? And the 
> > mobile stations can make a choice of the encr algo that 
> they can use.
> > 
> >     In that case, the Encryption policy defined as part of 
> Update WLAN 
> > ( Section 11.8.1.3) and Secn 11.8.1.1 (Add WLAN) should  be 
> a bit-map.
> 
> The quick answer is no, only a single encryption mechanism 
> can be used.
> Recall that this key indication is for either shared WEP, or dynamic
> (802.11i) encryption keys. Using the former, only a single 
> method is supported. As far as 802.11i, the standard states 
> that the lower encryption method advertised is used in 
> broadcast messages. For instance, if a BSSID advertises 
> support for WEP, TKIP and AES, all broadcast messages would 
> use WEP. So there is no such concept as having different 
> encryption group encryption algorithms per BSSID.
> 
> So I'd like to close this issue, unless folks disagree. 
> 
> 
> Pat Calhoun
> CTO, Wireless Networking Business Unit
> Cisco Systems
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