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Educause-Denver-2012 was a success. Great topics, amazing Weather, great audience, and even good food!
The following topics were tackled by the Wireless-LAN group within the 50 minutes assigned.

Here is the report from our meeting. Thank you to Jeffrey Ballentine from UPenn for taking notes during the meeting.

•802.11AC Why wait? Why jump?
AC is 5Hz only, the first offering will not support Multi user MIMO (the ability to support multiple devices on different streams) and it might take one more year before Multi User MIMO is supported.
The group was wondering if vendors were already offering AC devices. As usual with Wi-Fi, consumer APs are first available then enterprise grade.
So, no rush on AC as of today. And really Multi user MIMO seems to be the greatest benefit

•How to empower users with Bonjour needs (or more generally speaking: mDNS)? 
Members of the audience are starting to experience demand for support of devices like AppleTV including
Remote control and display mirroring. It seems that as time passes, we won't be able to ignore it ;-)
-mDNSext, the new IETF proposal, looks to be the only non-vendor specific solution in the pipeline (check Neil Johnson's post on this list for more info)
-Otherwise vendor specific solutions range from light control of the multicast traffic to  total control, turning Multicast into Unicast
and even doing identity based mDNSing (all MAC addresses assigned to a specific user can see each other even in different VLANs which can also address
some security concerns if devices are poorly configured)

•IP depletion (NAT?, Lease Time?, DHCP server load)
It seems that everyone is using NAT with leases from 10 min to 30 min to answer the growth, and one institution doing 1 day leases without issues.
Most people do NAT on their Firewall. The issue of logs was raised, but not many concerns there. One institution has a two week retention policy which
doesn't overload the log storage at all!

•As a side discussion we talked about RADIUS load...and that is definitely something to watch out for! Many members of the audience reported issues.
One institution is considering putting RADIUS behind a load balancer

•How to Deal with devices that cannot do 802.1x
Don't get rid of the NetReg SSID yet it can come to the rescue with non-1x devices
Only one institution was doing 802.1x only.
And many are doing one dedicated SSID with WPA2-PSK for institution owned devices (Scanners, projectors, etc...)


•Location Based Services (e.g. IP printing)
No one is using LBS in the audience or has seen a solution that is satisfactory. Do you?

•Success Stories with IPv6 on Wi-Fi?
Not much traction there. Someone mentioned one example of a faculty that needed to reach an IPv6 only site in Asia and V6 had to be enabled for that purpose
Some have V6 enable, but no one has a strategy in place. Remember June 6th is IPv6 day...do something!

•Is Wireless management slowly moving to the switch? What does it mean for us? (Will it all work with openflow seamlessly?) Any fear of being locked with one vendor
The gartner magic quadrant is now combining Wired and Wireless. Most vendors are offering Wireless and Wired. Controllers can only do so much. A natural evolution
seems to push some of the intelligence of Wireless back to the edge.
We had to  cover that topic really quickly due to lack of time. 
At Tennessee we see the integration of Wireless and Wired as a good thing to have the "traditional" network engineer been involved in wireless. Find Network Engineers
with Wireless expertise is hard, this might address this issue eventually. On the negative side, being locked with one vendor on Wired and Wireless is a deterrent to the adoption of
such an architecture. Time will tell!

•Outdoor Heat maps
Someone in the audience needed the ability to plot outdoor heat maps. No one had an answer for a solution. Do you?

Voila! Comments Welcome.

Best,

Philippe Hanset
Univ. of TN, Knoxville



********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.

Comments

Philippe,

 

So, in the US, power line AC is 60Hz and 802.11AC is 5Hz. What propagation range can we expect at sub-audio frequencies?  Will this affect transmission of high fidelity sound on 802.11AC?

 

Humorous typo J

 

I believe Aruba at one time had a solution (possibly unsupported) for outdoor mapping.

 

Thanks, Philippe.

 

Bruce Osborne 
Network Engineer
IT Network Services

(434) 592-4229



Liberty University  |  Training Champions for Christ since 1971

 

From: Hanset, Philippe C [mailto:phanset@UTK.EDU]
Sent: Monday, November 12, 2012 11:28 AM
Subject: Report from Educause (the session was not streamed)

 

Educause-Denver-2012 was a success. Great topics, amazing Weather, great audience, and even good food!

The following topics were tackled by the Wireless-LAN group within the 50 minutes assigned.

 

Here is the report from our meeting. Thank you to Jeffrey Ballentine from UPenn for taking notes during the meeting.

 

•802.11AC Why wait? Why jump?

AC is 5Hz only, the first offering will not support Multi user MIMO (the ability to support multiple devices on different streams) and it might take one more year before Multi User MIMO is supported.

The group was wondering if vendors were already offering AC devices. As usual with Wi-Fi, consumer APs are first available then enterprise grade.

So, no rush on AC as of today. And really Multi user MIMO seems to be the greatest benefit

 

•        How to empower users with Bonjour needs (or more generally speaking: mDNS)? 

Members of the audience are starting to experience demand for support of devices like AppleTV including

Remote control and display mirroring. It seems that as time passes, we won't be able to ignore it ;-)

-mDNSext, the new IETF proposal, looks to be the only non-vendor specific solution in the pipeline (check Neil Johnson's post on this list for more info)

-Otherwise vendor specific solutions range from light control of the multicast traffic to  total control, turning Multicast into Unicast

and even doing identity based mDNSing (all MAC addresses assigned to a specific user can see each other even in different VLANs which can also address

some security concerns if devices are poorly configured)

 

•        IP depletion (NAT?, Lease Time?, DHCP server load)

It seems that everyone is using NAT with leases from 10 min to 30 min to answer the growth, and one institution doing 1 day leases without issues.

Most people do NAT on their Firewall. The issue of logs was raised, but not many concerns there. One institution has a two week retention policy which

doesn't overload the log storage at all!

 

•As a side discussion we talked about RADIUS load...and that is definitely something to watch out for! Many members of the audience reported issues.

One institution is considering putting RADIUS behind a load balancer

 

•        How to Deal with devices that cannot do 802.1x

Don't get rid of the NetReg SSID yet it can come to the rescue with non-1x devices

Only one institution was doing 802.1x only.

And many are doing one dedicated SSID with WPA2-PSK for institution owned devices (Scanners, projectors, etc...)

 

 

•        Location Based Services (e.g. IP printing)

No one is using LBS in the audience or has seen a solution that is satisfactory. Do you?

 

•        Success Stories with IPv6 on Wi-Fi?

Not much traction there. Someone mentioned one example of a faculty that needed to reach an IPv6 only site in Asia and V6 had to be enabled for that purpose

Some have V6 enable, but no one has a strategy in place. Remember June 6th is IPv6 day...do something!

 

•Is Wireless management slowly moving to the switch? What does it mean for us? (Will it all work with openflow seamlessly?) Any fear of being locked with one vendor

The gartner magic quadrant is now combining Wired and Wireless. Most vendors are offering Wireless and Wired. Controllers can only do so much. A natural evolution

seems to push some of the intelligence of Wireless back to the edge.

We had to  cover that topic really quickly due to lack of time. 

At Tennessee we see the integration of Wireless and Wired as a good thing to have the "traditional" network engineer been involved in wireless. Find Network Engineers

with Wireless expertise is hard, this might address this issue eventually. On the negative side, being locked with one vendor on Wired and Wireless is a deterrent to the adoption of

such an architecture. Time will tell!

 

•Outdoor Heat maps

Someone in the audience needed the ability to plot outdoor heat maps. No one had an answer for a solution. Do you?

 

Voila! Comments Welcome.

 

Best,

 

Philippe Hanset

Univ. of TN, Knoxville

 

 

 

********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.

********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.

Message from me@mpking.com

Ekahau has GPS assisted survey

I've used it to map our outdoor Wifi deployment.

You need a GPS, and you need to be a bit careful on how you collect your results.  Driving 30MPH inside a car did not necessarily equate to walking around with a laptop. (Signal loss from being inside a car, as well as the impact on roaming while moving that fast)

Mike


Message from me@mpking.com

Here's a screen shot from one I did previous to our outdoor deployment
(Only one I can find right now)


Message from babell@pacific.edu

This free Mac app works pretty well without GPS and may be worth a try.  Maybe not as good as the GPS-assisted solutions, but has worked well for my personal use:

 

http://www.netspotapp.com/

 

Basically you just import an image from a satellite map or a scale drawing and then click two points on the map where the distance is known and then enter that distance.  Then you just walk to various points on the map, click that location on the map and wait a few seconds for it to gather wireless info.  When you’re done you get a pretty accurate heatmap for SNR, signal, etc. overlaid on the image.

 

YMMV, of course, but it’s pretty neat.

 

Cheers,

 

B.

 

 

----------------------------

Brandon Abell

Library Technical Specialist

University of the Pacific

McGeorge School of Law

 

E-Mail: babell@pacific.edu

Phone:  (916) 739-7029

Office: Library 151

----------------------------

 

From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Mike King
Sent: Tuesday, November 13, 2012 10:43 AM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: Re: [WIRELESS-LAN] Report from Educause (the session was not streamed)

 

Ekahau has GPS assisted survey

 

I've used it to map our outdoor Wifi deployment.

 

You need a GPS, and you need to be a bit careful on how you collect your results.  Driving 30MPH inside a car did not necessarily equate to walking around with a laptop. (Signal loss from being inside a car, as well as the impact on roaming while moving that fast)

 

Mike

 

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