The 7920 uses CCKM for key management when available.  As you note, there is
no mention of "only 7920s" or "only Cisco clients."  In that case, both can
be used.

As for the phone SSID optimization (SSIDs IPX5 and IPX6,) here's what is
provided in the DSG.  These are based on both the 7921G Design Guide
(11/17/200) and the VoWLAN 4.1 Design Guide.

1. Disabled session timeout ( (7921G DG, p45.  This has been debated.
The 7921G DG shows this as a timeout of 86400, or 1 day.)
2. Disabled client exclusion (7921G DG, p45)
3. DHCP Addr Assignment is unchecked (7921G DG, p45 and VoWLAN DG, p10-33)
There are other components as well, but nothing that is specific to the WLAN
configuration.


Jason Boyers - CCIE #26024 (Wireless)
Senior Technical Instructor - IPexpert, Inc.
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2011/7/21 Kristján Ólafur Eðvarðsson <[email protected]>

> Correction , I meant.
>
> There is one thing I am curious about
>
> WLAN Security continued IPX5 and IPX6 SSID's.
>
> IPX5 for 7920 phone
> IPX6 for 7921 phone
>
> Can anyone tell me why 7920 are always reccomended by DSG
> for 802.1x + cckm authentication and 7921 can use CCKM only?
> I just downloaded a recent DSG.
>
> I know the requirements was to have only Cisco clients for IPX6
> and therefore CCKM appropriate. But there were no requiremens for 7920
> ssid IPX5 regarding "Cisco clients only" e.t.c
>
> I wonder if CCKM is nott supported for 7920 phones as the only key
> management.
>
> Also in the DSG, I failed to see the optimization config for those phone
> SSID's (page 54)
>
> regards. Kristjan
>
>
>
> -----Original Message-----
> From: [email protected] [mailto:
> [email protected]] On Behalf Of
> [email protected]
> Sent: 21. júlí 2011 16:00
> To: [email protected]
> Subject: CCIE_Wireless Digest, Vol 28, Issue 23
>
> Send CCIE_Wireless mailing list submissions to
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>   1. Workbook volume 1 - 4.6 WLAN security page 53
>      (Kristj?n ?lafur E?var?sson)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 21 Jul 2011 00:42:23 +0000
> From: Kristj?n ?lafur E?var?sson <[email protected]>
> To: "[email protected]"
>        <[email protected]>
> Subject: [OSL | CCIE_Wireless] Workbook volume 1 - 4.6 WLAN security
>        page 53
> Message-ID:
>        <[email protected]>
> Content-Type: text/plain; charset="iso-8859-1"
>
> There is one thing I am curious about
>
> WLAN Security continued IPX5 and IPX6 SSID's.
>
> IPX5 for 7920 phone
> IPX6 for 7921 phone
>
> Can anyone tell me why 7921 are always reccomended by DSG
> for 802.1x + cckm authentication and 7921 can use CCKM only?
> I just downloaded a recent DSG.
>
> I know the requirements was to have only Cisco clients for IPX6
> and therefore CCKM appropriate. But there were no requiremens for 7920
> ssid IPX5 regarding "Cisco clients only" e.t.c
>
> I wonder if CCKM isn?t supported as the only key management.
>
> Also in the DSG, I failed to see the optimization config for those phone
> SSID's (page 54)
>
> regards. Kristjan
>
>
>
> ------------------------------
>
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> End of CCIE_Wireless Digest, Vol 28, Issue 23
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