Great info to know. Thanks again Stan. --Bruce
-----Original Message-----
From: The EDUCAUSE Wireless Issues Constituent Group Listserv
[mailto:[EMAIL PROTECTED] On Behalf Of Brooks, Stan
Sent: Monday, June 02, 2008 12:29 PM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: Re: [WIRELESS-LAN] Disabling 1, 2 Mbps- revisit
Well, SVP <technically> is capable of being routed, but I don't know of any
installations that do. It requires multicast be enabled on the VoIP over Wi-Fi
subnets as the handsets find the AVPP (Avaya Voice Priority Processor) using a
multicast/broadcast address. The AVPP really doesn't buy you much in a
centralized controller-based wireless environment since the controllers do a lot
of what the AVPP does (QoS). It's just needed in the Avaya environment...
>>-> Stan Brooks - CWNA/CWSP
Emory University
Network Communications Division
404.727.0226
[EMAIL PROTECTED]
AIM: WLANstan Yahoo!: WLANstan MSN: [EMAIL PROTECTED]
________________________________________
From: The EDUCAUSE Wireless Issues Constituent Group Listserv
[EMAIL PROTECTED] On Behalf Of Johnson, Bruce T
[EMAIL PROTECTED]
Sent: Monday, June 02, 2008 12:12 PM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: Re: [WIRELESS-LAN] Disabling 1, 2 Mbps- revisit
Appreciate the info. That's interesting about AVPP/SVP not being routable.
Thanks very much Stan.
************************************
Bruce Johnson
Network Engineer
Partners Healthcare
617-726-9662
mailto: [EMAIL PROTECTED]
************************************
-----Original Message-----
From: The EDUCAUSE Wireless Issues Constituent Group Listserv on behalf of
Brooks, Stan
Sent: Mon 6/2/2008 11:51 AM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: Re: [WIRELESS-LAN] Disabling 1, 2 Mbps- revisit
Bruce,
We use Aruba for our wireless infrastructure. We are using the Avaya 3641's -
.11b/g phones, not a. We use WPA2-PSK for "security" as the phones don't
support an 802.1x. Yes, we do use SVP (or in Avaya terms the AVPP) for QoS -
but that limits us to a single layer 2 VLAN for our phones. I'd much prefer a
SIP-based phone that supports routing of the traffic beyond the phones' subnet.
I'm not sure if they support WMM - I don't think so - and not sure about CCKM as
we are not a Cisco shop for wireless. We did have some problems when we first
moved to the 3641's with roaming - they couldn't make up their mind wich AP to
stick with. This has been mostly fixed with newer handset code.
>>-> Stan Brooks - CWNA/CWSP
Emory University
Network Communications Division
404.727.0226
[EMAIL PROTECTED]
AIM: WLANstan Yahoo!: WLANstan MSN: [EMAIL PROTECTED]
________________________________________
From: The EDUCAUSE Wireless Issues Constituent Group Listserv
[EMAIL PROTECTED] On Behalf Of Johnson, Bruce T
[EMAIL PROTECTED]
Sent: Monday, June 02, 2008 11:37 AM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: Re: [WIRELESS-LAN] Disabling 1, 2 Mbps- revisit
Hey Stan,
What's been your experience with the PolyComm phones? Are you using the 8000
Series 802.11a phones? Their minimum RSSI spec (-60) seems to be considerably
lower than the Cisco 7921G.
I'm assuming you are using a Cisco infrastructure (apologies if not). Do these
phones truly support CCKM (Cisco Fast Roaming)? They indicate as much but don't
support the requisite 802.1x mechanisms (LEAP/EAP-FAST). Can they interoperate
with WMM or did you have to enable SVP QoS?
Thanks,
--Bruce Johnson
-----Original Message-----
From: The EDUCAUSE Wireless Issues Constituent Group Listserv
[mailto:[EMAIL PROTECTED] On Behalf Of Brooks, Stan
Sent: Monday, June 02, 2008 11:21 AM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: Re: [WIRELESS-LAN] Disabling 1, 2 Mbps- revisit
Brandon,
We are using Avaya (SpectraLInk/PolyComm) handsets for our VoIP over Wi-Fi.
>>-> Stan Brooks - CWNA/CWSP
Emory University
Network Communications Division
404.727.0226
[EMAIL PROTECTED]
AIM: WLANstan Yahoo!: WLANstan MSN: [EMAIL PROTECTED]
________________________________________
From: The EDUCAUSE Wireless Issues Constituent Group Listserv
[EMAIL PROTECTED] On Behalf Of Brandon Pinsky
[EMAIL PROTECTED]
Sent: Thursday, May 29, 2008 1:03 PM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: Re: [WIRELESS-LAN] Disabling 1, 2 Mbps- revisit
Stan,
Are you using Vocera for VoIP over Wifi?
Thanks, BJ
On May 29, 2008, at 11:24 AM, Brooks, Stan wrote:
> Matt & Lee -
>
> At Emory, we've disabled the 1 & 2 Mbps data rates on our healthcare
> wireless network for our VoIP over Wi-Fi and electronic medical
> records SSIDs in 2 of our hospitals. The hospitals are "hot"
> environments - lots of APs. Doing so improved the quality of our
> wireless voice traffic tremendously. It also improved our
> electronic medical records connectivity as well - less roaming
> between APs means fewer authentications. We've been running with
> the disabled data rates since last fall with no problems.
>
> We have not done this (yet) on the academic network, but are looking
> into it at certain high density locations. The Aruba gear we are
> running allows doing this on a per SSID and per AP (or per
> building) basis - very flexible.
>
> We haven't done this for our guest network, even in those hot
> environments. BTW - for guest authentication, we use a captive
> portal, but have MAC auth for pre- registered iPhones, gaming
> devices, and PDAs to bypass the captive portal. Users must bring
> the device to our clean-room to get the device registered and we
> only register devices that can't support WPA/WPA2-Enterprise (802.1x).
>
>>> -> Stan Brooks - CWNA/CWSP
> Emory University
> Network Communications Division
> 404.727.0226
> [EMAIL PROTECTED]
> AIM: WLANstan Yahoo!: WLANstan MSN: [EMAIL PROTECTED]
> ________________________________________
> From: The EDUCAUSE Wireless Issues Constituent Group Listserv
[EMAIL PROTECTED]
> ] On Behalf Of Barber, Matt [EMAIL PROTECTED]
> Sent: Thursday, May 29, 2008 8:13 AM
> To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
> Subject: Re: [WIRELESS-LAN] Disabling 1, 2 Mbps- revisit
>
> Hi Lee,
>
> We have been running with the 1 and 2 Mbps data rates disabled for
> quite some time. The Meru stuff lets us do it by ESS, which
> actually ended up being very helpful because of one issue I found.
>
> We have a separate SSID for devices (iPods, gaming consoles, etc)
> that is using WEP. I started off having the 1 and 2 data rates
> disabled on this SSID as well, until I found that the Nintendo Wii
> and Nintendo DS did not like it. In doing a packet capture over the
> air, the Wii would just sit there doing probe requests, get probe
> responses from the APs, but then just keep on probe requesting. It
> would never try and associate. Turning the low data rates back on
> for this ESS resolved the issue.
>
> I contacted Nintendo about it and they said I may be correct, but
> said they didn't understand why I would want to turn those data
> rates off.
>
> Those were the only devices I found that had any issue. In general,
> I see the same things as you in terms of clients not connecting to
> distant APs.
>
> Take care,
>
> Matt Barber
> Network Analyst / PC Support
> Morrisville State College
> 315-684-6053
>
> From: The EDUCAUSE Wireless Issues Constituent Group Listserv
[mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
> ] On Behalf Of Lee H Badman
> Sent: Thursday, May 29, 2008 7:57 AM
> To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
> Subject: [WIRELESS-LAN] Disabling 1, 2 Mbps- revisit
>
> I recall someone floating this not too long ago, but can't recall
> the responses.
>
> Being an LWAPP environment (currently) and growing fast in AP
> numbers and overall density, I'm considering disabling 1 and 2 Mbps
> data rates globally. I did this in an under the radar test for a
> couple of months on some of our busiest APs with no ill effects
> noted and what I see as fewer weak clients trying to get on board
> busy cells.
>
> Has anyone else taken this step? Curious in general, and in LWAPP.,
> and if there have been any ill effects noted. One concern/peeve I
> have is that in LWAPP its controller wide- if there is some
> compelling reason to change the data rate on just a few APs in one
> area, you have no choice but to do the same for all APs on the
> controller.
>
> Thanks-
>
> Lee
>
> Lee H. Badman
> Wireless/Network Engineer
> Information Technology and Services
> Syracuse University
> 315 443-3003
>
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