Re: [WIRELESS-LAN] Wireless Mobility

[Jeffrey D. Sessler]

On limiting the 8510 to 3000 WAPs, and then adding another 8510 pair. Since the 
8500 series are subject to Cisco’s new and improved RTU licensing, instead of 
adding another pair of 8510’s, purchase a pair of 8540’s and move the 8510’s 
3000 AP licenses to the new 8540 along with the additional licenses. I mention 
this because the zero-AP 8510 and 8540 are the exact same list price, so it 
doesn’t make a lot of sense to get the 8510’a. Oh, and instead of smartnet on 
four 8510 controllers, it’s just smartnet on two 8540’s.

Jeff


From: "wireless-lan@listserv.educause.edu"  
on behalf of "Watters, John" 
Reply-To: "wireless-lan@listserv.educause.edu" 

Date: Tuesday, August 9, 2016 at 12:32 PM
To: "wireless-lan@listserv.educause.edu" 
Subject: Re: [WIRELESS-LAN] Wireless Mobility

If you have HA pairs of Cisco 8510s why would you not rely on the failover unit 
to be the backup? Were you going to buy two HA pairs for each campus?

We have been using Cisco 8510 HA pairs for a few months now with goo success. 
Our failover unit is at our on campus backup data center (we also have DR type 
of stuff at a facility in Atlanta). All of our buildings have dual feeds to 
both our main DC as well as the backup DC. When an 8510 fails over to the HA 
unit, the clients are rarely affected at all since the HA unit keeps full state 
info. All along the units seem to fail over for some reason with the roles of 
the two units reversed. The clients do not know the difference, nor do the APs. 
We have to look closely to tell which is active since they share a common IP 
address for AP (and therefore, also client) connectivity.

We do not list a secondary or tertiary controller for any of our APs.

As for mobility groups, since our campus is divided into three MPLS areas each 
with a single 8510 (and it's HA unit), we have different mobility group in each 
area. These are relatively separated by outdoor space, though users can be 
outside in a place that is covered by leakage from buildings in two areas (and 
hence two mobility domains). We have not had any complaints though. We do 
physically house all of our 8510 primary WLCs in the main DC and all of the HA 
units in the backup DC. Having as lot of fiber makes this quite doable.

I'm sure that others who have been running these longer that we have will have 
some opinions as well.

By the way, even though each 8510 has a listed capacity of 6,000 APs, we are 
trying to limit ours to 3,000 for now. Two of my MPLS areas are comfortably 
below 3,000 but one is close. We will be ordering another 8510 HA pair for this 
area. They will both be placed in the same mobility group.

If you want more info, please feel free to call.

John Watters
Network Engineer, Office of Information technology
The University of Alabama
A115 Gordon Palmer Hall
Box 870346
Tuscaloosa, AL 35487
Phone 205-348-3992
john.watt...@ua.edu
[he University of Alabama]

From: The EDUCAUSE Wireless Issues Constituent Group Listserv 
[mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Chris Wandell
Sent: Tuesday, August 09, 2016 12:12 PM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: [WIRELESS-LAN] Wireless Mobility

We are in the process of setting up new wireless controllers at Binghamton 
University. We will be setting up 2 sets of 8540 ha paired controllers on our 
main campus and 1 set of 5520 ha paired controllers on a satellite campus. This 
will be the first time we have housed controllers at the satellite campus. 
Currently we have 3 sets of Wism2 controllers on campus and let access points 
associate to any of our controllers. All current controllers are in the same 
mobility group. What we would like to do to is break up ap's by building, with 
each ap in a building having a defined primary and secondary controller. My 
question is would we still need the mobility group for our controllers?

Any problems concerns you see by doing this?

Thanks in advance for any input

Chris
** 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/.

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

Re: [WIRELESS-LAN] Wireless Mobility

[Jake Snyder]

FYI, you might look at 8540 if you are ordering net-new controllers.  8540 only 
runs 8.1+ so be aware.

Thanks
Jake Snyder


Sent from my iPhone

> On Aug 9, 2016, at 1:32 PM, Watters, John  wrote:
> 
> If you have HA pairs of Cisco 8510s why would you not rely on the failover 
> unit to be the backup? Were you going to buy two HA pairs for each campus?
>  
> We have been using Cisco 8510 HA pairs for a few months now with goo success. 
> Our failover unit is at our on campus backup data center (we also have DR 
> type of stuff at a facility in Atlanta). All of our buildings have dual feeds 
> to both our main DC as well as the backup DC. When an 8510 fails over to the 
> HA unit, the clients are rarely affected at all since the HA unit keeps full 
> state info. All along the units seem to fail over for some  reason with the 
> roles of the two units reversed. The clients do not know the difference, nor 
> do the APs. We have to look closely to tell which is active since they share 
> a common IP address for AP (and therefore, also client) connectivity.
>  
> We do not list a secondary or tertiary controller for any of our APs.
>  
> As for mobility groups, since our campus is divided into three MPLS areas 
> each with a single 8510 (and it's HA unit), we have different mobility group 
> in each area. These are relatively separated by outdoor space, though users 
> can be outside in a place that is covered by leakage from buildings in two 
> areas (and hence two mobility domains). We have not had any complaints 
> though. We do physically house all of our 8510 primary WLCs in the main DC 
> and all of the HA units in the backup DC. Having as lot of fiber makes this 
> quite doable.
>  
> I'm sure that others who have been running these longer that we have will 
> have some opinions as well.
>  
> By the way, even though each 8510 has a listed capacity of 6,000 APs, we are 
> trying to limit ours to 3,000 for now. Two of my MPLS areas are comfortably 
> below 3,000 but one is close. We will be ordering another 8510 HA pair for 
> this area. They will both be placed in the same mobility group.
>  
> If you want more info, please feel free to call.
>  
> John Watters
> Network Engineer, Office of Information technology
> 
> The University of Alabama
> A115 Gordon Palmer Hall
> Box 870346 
> Tuscaloosa, AL 35487 
> Phone 205-348-3992
> john.watt...@ua.edu
> 
>  
> From: The EDUCAUSE Wireless Issues Constituent Group Listserv 
> [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Chris Wandell
> Sent: Tuesday, August 09, 2016 12:12 PM
> To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
> Subject: [WIRELESS-LAN] Wireless Mobility
>  
> We are in the process of setting up new wireless controllers at Binghamton 
> University. We will be setting up 2 sets of 8540 ha paired controllers on our 
> main campus and 1 set of 5520 ha paired controllers on a satellite campus. 
> This will be the first time we have housed controllers at the satellite 
> campus. Currently we have 3 sets of Wism2 controllers on campus and let 
> access points associate to any of our controllers. All current controllers 
> are in the same mobility group. What we would like to do to is break up ap's 
> by building, with each ap in a building having a defined primary and 
> secondary controller. My question is would we still need the mobility group 
> for our controllers?
>  
> Any problems concerns you see by doing this?
>  
> Thanks in advance for any input
>  
> Chris
> ** 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/.

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

RE: [WIRELESS-LAN] Wireless Mobility

[Watters, John]

If you have HA pairs of Cisco 8510s why would you not rely on the failover unit 
to be the backup? Were you going to buy two HA pairs for each campus?

We have been using Cisco 8510 HA pairs for a few months now with goo success. 
Our failover unit is at our on campus backup data center (we also have DR type 
of stuff at a facility in Atlanta). All of our buildings have dual feeds to 
both our main DC as well as the backup DC. When an 8510 fails over to the HA 
unit, the clients are rarely affected at all since the HA unit keeps full state 
info. All along the units seem to fail over for some reason with the roles of 
the two units reversed. The clients do not know the difference, nor do the APs. 
We have to look closely to tell which is active since they share a common IP 
address for AP (and therefore, also client) connectivity.

We do not list a secondary or tertiary controller for any of our APs.

As for mobility groups, since our campus is divided into three MPLS areas each 
with a single 8510 (and it's HA unit), we have different mobility group in each 
area. These are relatively separated by outdoor space, though users can be 
outside in a place that is covered by leakage from buildings in two areas (and 
hence two mobility domains). We have not had any complaints though. We do 
physically house all of our 8510 primary WLCs in the main DC and all of the HA 
units in the backup DC. Having as lot of fiber makes this quite doable.

I'm sure that others who have been running these longer that we have will have 
some opinions as well.

By the way, even though each 8510 has a listed capacity of 6,000 APs, we are 
trying to limit ours to 3,000 for now. Two of my MPLS areas are comfortably 
below 3,000 but one is close. We will be ordering another 8510 HA pair for this 
area. They will both be placed in the same mobility group.

If you want more info, please feel free to call.

John Watters
Network Engineer, Office of Information technology
The University of Alabama
A115 Gordon Palmer Hall
Box 870346
Tuscaloosa, AL 35487
Phone 205-348-3992
john.watt...@ua.edu
[The University of Alabama]

From: The EDUCAUSE Wireless Issues Constituent Group Listserv 
[mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Chris Wandell
Sent: Tuesday, August 09, 2016 12:12 PM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: [WIRELESS-LAN] Wireless Mobility

We are in the process of setting up new wireless controllers at Binghamton 
University. We will be setting up 2 sets of 8540 ha paired controllers on our 
main campus and 1 set of 5520 ha paired controllers on a satellite campus. This 
will be the first time we have housed controllers at the satellite campus. 
Currently we have 3 sets of Wism2 controllers on campus and let access points 
associate to any of our controllers. All current controllers are in the same 
mobility group. What we would like to do to is break up ap's by building, with 
each ap in a building having a defined primary and secondary controller. My 
question is would we still need the mobility group for our controllers?

Any problems concerns you see by doing this?

Thanks in advance for any input

Chris
** 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/.

RE: [WIRELESS-LAN] Wireless Mobility

[McClintic, Thomas]

Here is my suggestion:

Create a separate mobility group for your satellite controller.
If you can separate the mobility groups for the 2 8540 pairs I would do that. 
However, if people can roam from one building to another and they are not in 
the same mobility group you will see client issues. You will also get rogue 
notices.

Really it comes down to the ability to separate geographically, if you can do 
that you are set. If not, then use the same group for the 2 8540s.

We use a lot of AP Groups and AP templates in Prime to help separate networks 
and provision. Deploying the templates can be done by building which really 
eases that process.

Hope this helps….

TJ McClintic


From: The EDUCAUSE Wireless Issues Constituent Group Listserv 
[mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Chris Wandell
Sent: Tuesday, August 9, 2016 12:12 PM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: [WIRELESS-LAN] Wireless Mobility

We are in the process of setting up new wireless controllers at Binghamton 
University. We will be setting up 2 sets of 8540 ha paired controllers on our 
main campus and 1 set of 5520 ha paired controllers on a satellite campus. This 
will be the first time we have housed controllers at the satellite campus. 
Currently we have 3 sets of Wism2 controllers on campus and let access points 
associate to any of our controllers. All current controllers are in the same 
mobility group. What we would like to do to is break up ap's by building, with 
each ap in a building having a defined primary and secondary controller. My 
question is would we still need the mobility group for our controllers?

Any problems concerns you see by doing this?

Thanks in advance for any input

Chris
** 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/.

Wireless Mobility

[Chris Wandell]

We are in the process of setting up new wireless controllers at Binghamton
University. We will be setting up 2 sets of 8540 ha paired controllers on
our main campus and 1 set of 5520 ha paired controllers on a satellite
campus. This will be the first time we have housed controllers at the
satellite campus. Currently we have 3 sets of Wism2 controllers on campus
and let access points associate to any of our controllers. All current
controllers are in the same mobility group. What we would like to do to is
break up ap's by building, with each ap in a building having a defined
primary and secondary controller. My question is would we still need the
mobility group for our controllers?

Any problems concerns you see by doing this?

Thanks in advance for any input

Chris

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

Re: [WIRELESS-LAN] Non penetrating roof mounted WiFi antenna

[Jeffrey D. Sessler]

I would consult with your facilities, and more specifically a qualified 
engineer that can do the load calculations, grounding requirements, check local 
code, then sign-off on the install. In today litigious environment, and 
depending on local code, it may be unwise to have unsecured ballast and/or if 
not a temp install (couple of days) an antenna that’s not permanently secured 
to the structure.

Jeff

From: "wireless-lan@listserv.educause.edu"  
on behalf of "Mattson, III, Ken V" 
Reply-To: "wireless-lan@listserv.educause.edu" 

Date: Monday, August 8, 2016 at 3:30 PM
To: "wireless-lan@listserv.educause.edu" 
Subject: [WIRELESS-LAN] Non penetrating roof mounted WiFi antenna

Has anyone roof mounted an AIR-ANT2588P3M-N antenna? Do you have pictures of 
the installation that you could share?  How high did you mount it? How much 
weight did you put on the base? We plan on putting it as high at 8-10 ft. on 
something like this:
http://www.cableandwireshop.com/non-penetrating-roof-mount-with-166-x-120-mast.html

Any gotchas we should be aware of?

Thanks for any assistance,

Kenneth V. Mattson III
Director - Network and Data
DoIT
Creighton University
402-280-2743
402-981-1140

A password is like a toothbrush:
Choose a good one, change it regularly and don't share it.
** 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/.

RE: [WIRELESS-LAN] Non penetrating roof mounted WiFi antenna

[Chuck Enfield]

If you’re lucky enough to have good attachment points in the right locations 
you could guy the antenna instead of using ballast.  This results in a more 
stable installation and lighter roof loading.  It rarely works out, but you 
could get lucky.



Definitely use a pad under the mount.  This isn’t for anti-skid purposes. 
It protects the roof membrane from the mount and any falling ballast should 
the mount tip over.



I also tether the mount so that it stays put.  Come from two nearly-opposite 
directions and leave just enough slack that the antenna can fall over, but 
can’t move around much from there.  You don’t want it damaging anything on 
the roof, or worse, flying off of the roof.



Chuck



From: The EDUCAUSE Wireless Issues Constituent Group Listserv 
[mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Mattson, III, Ken V
Sent: Monday, August 08, 2016 6:30 PM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: [WIRELESS-LAN] Non penetrating roof mounted WiFi antenna



Has anyone roof mounted an AIR-ANT2588P3M-N antenna? Do you have pictures of 
the installation that you could share?  How high did you mount it? How much 
weight did you put on the base? We plan on putting it as high at 8-10 ft. on 
something like this:

http://www.cableandwireshop.com/non-penetrating-roof-mount-with-166-x-120-mast.html



Any gotchas we should be aware of?



Thanks for any assistance,



Kenneth V. Mattson III
Director - Network and Data
DoIT
Creighton University
402-280-2743
402-981-1140

A password is like a toothbrush:
Choose a good one, change it regularly and don't share it.

** 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/.

Re: [WIRELESS-LAN] Non penetrating roof mounted WiFi antenna

[Craig Eyre]

We use those mounts on all our installs with a rubber mat underneath and 4
cinder blocks holding it down and they don't move at all. I agree with the
other comments of lightning arrestors, power protection, appropriate
weather prevention for cabling coming through the ceiling. We don't run
fiber to ours but that's another good idea.

The only question I have is that antenna outdoor nema rated?


Craig Eyre

On Mon, Aug 8, 2016 at 4:30 PM, Mattson, III, Ken V <
kenmatt...@creighton.edu> wrote:

> Has anyone roof mounted an AIR-ANT2588P3M-N antenna? Do you have pictures
> of the installation that you could share?  How high did you mount it? How
> much weight did you put on the base? We plan on putting it as high at 8-10
> ft. on something like this:
>
> http://www.cableandwireshop.com/non-penetrating-roof-
> mount-with-166-x-120-mast.html
>
>
>
> Any gotchas we should be aware of?
>
>
>
> Thanks for any assistance,
>
>
>
> Kenneth V. Mattson III
> Director - Network and Data
> DoIT
> Creighton University
> 402-280-2743
> 402-981-1140
>
> A password is like a toothbrush:
> Choose a good one, change it regularly and don't share it.
> ** Participation and subscription information for this EDUCAUSE
> Constituent Group discussion list can be found at http://www.educause.edu/
> groups/.
>
>


-- 
Craig Eyre
Network Analyst
IT Services Department
Mount Royal University
4825 Mount Royal Gate SW
Calgary AB T2P 3T5

P. 403.440.5199
E. ce...@mtroyal.ca

"The difference between a successful person and others is not a lack of
strength, not a lack of knowledge, but rather in a lack of will." Vincent
T. Lombardi"

MRU IT Services will NEVER ask you for your password or to update or verify
your email account through an email. DO NOT click any links in an email
asking you to update or verify your email account.

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

Re: [WIRELESS-LAN] Non penetrating roof mounted WiFi antenna

[Reynolds, David K.]

I would also recommend using a rubber barrier non-slip matt under the mount, 
I’m assuming your ballast will be concrete blocks this will also be more 
forgiving to the roof surface too .


David Reynolds
Information Services - Network Operations
Wireless Network Support Specialist
Quinnipiac University
Desk: 203 582 5289 / Cell: 203 889 8135


[http://content.sportslogos.net/logos/33/810/thumbs/ew01aoekmcrrx0us00rsrcww6.gif]


From: The EDUCAUSE Wireless Issues Constituent Group Listserv 
mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>> 
on behalf of "McClintic, Thomas" 
mailto:thomas.mcclin...@uth.tmc.edu>>
Reply-To: The EDUCAUSE Wireless Issues Constituent Group Listserv 
mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>>
Date: Tuesday, August 9, 2016 at 9:34 AM
To: The EDUCAUSE Wireless Issues Constituent Group Listserv 
mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>>
Subject: Re: [WIRELESS-LAN] Non penetrating roof mounted WiFi antenna

Those sled mounts are great and the antenna you are looking at has very little 
wind resistance. I would suggest using fiber if able and take Sam’s points to 
heart as well. Proper sealing and grounding will keep your install working for 
years instead of months.

TJ McClintic


From: The EDUCAUSE Wireless Issues Constituent Group Listserv 
[mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Samuel Clements
Sent: Tuesday, August 9, 2016 8:18 AM
To: 
WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: Re: [WIRELESS-LAN] Non penetrating roof mounted WiFi antenna

And of course you'll want to make sure you can support the weight of the AP 
along with it. Those outdoor units can be hefty. That is unless you're using 
extension cables to hang the AP inside with the antenna outside. In which case, 
proper sealing of all of your connectors, lightning arresting, power 
protection, etc are all good 'non mount' gotchas you're going to want to 
consider.
  -Sam

On Mon, Aug 8, 2016 at 7:06 PM, DAVID BEYERLE 
mailto:deb...@psu.edu>> wrote:
Ken,

First calculate the wind pressure from the antenna using something like  
http://www.wikihow.com/Calculate-Wind-Load.
  A wind load of ~25 lb for that antenna should be very conservative.  Then sum 
the reactions (torques) at the base of the roof mount...the antenna imparts an 
overturning moment of ~250 ft-lb at the mast base, and so you ballast the mount 
to compensate for this.  The base of the frame is ~3' square, so the center of 
mass of cinder blocks which you'll use for ballast will be ~1.3' from the base 
of the mast, suggesting 180 lb of ballast should be enough.  Many installations 
use considerably less ballast and get away with it.  I happen to not like my 
masts to move (much).

The "gotcha" you should be aware of this that your roof must be able to support 
a ~200 lb load over an area of ~6 sq ft.  Of course, if it supports you, it 
likely will support the loading of this assemblage as well.

Best,
Dave

David Beyerle, P.E.
Communications Engineer, IEEE WCP
Penn State University
117 University Support Bldg 2
University Park PA  16802
da...@psu.edu
814 863-9432


From: "Mattson, III, Ken V" 
mailto:kenmatt...@creighton.edu>>
To: 
WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Sent: Monday, August 8, 2016 6:30:21 PM
Subject: [WIRELESS-LAN] Non penetrating roof mounted WiFi antenna

Has anyone roof mounted an AIR-ANT2588P3M-N antenna? Do you have pictures of 
the installation that you could share?  How high did you mount it? How much 
weight did you put on the base? We plan on putting it as high at 8-10 ft. on 
something like this:
http://www.cableandwireshop.com/non-penetrating-roof-mount-with-166-x-120-mast.html

Any gotchas we should be aware of?

Thanks for any assistance,

Kenneth V. Mattson III
Direct

RE: [WIRELESS-LAN] Non penetrating roof mounted WiFi antenna

[McClintic, Thomas]

Those sled mounts are great and the antenna you are looking at has very little 
wind resistance. I would suggest using fiber if able and take Sam’s points to 
heart as well. Proper sealing and grounding will keep your install working for 
years instead of months.

TJ McClintic


From: The EDUCAUSE Wireless Issues Constituent Group Listserv 
[mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Samuel Clements
Sent: Tuesday, August 9, 2016 8:18 AM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: Re: [WIRELESS-LAN] Non penetrating roof mounted WiFi antenna

And of course you'll want to make sure you can support the weight of the AP 
along with it. Those outdoor units can be hefty. That is unless you're using 
extension cables to hang the AP inside with the antenna outside. In which case, 
proper sealing of all of your connectors, lightning arresting, power 
protection, etc are all good 'non mount' gotchas you're going to want to 
consider.
  -Sam

On Mon, Aug 8, 2016 at 7:06 PM, DAVID BEYERLE 
mailto:deb...@psu.edu>> wrote:
Ken,

First calculate the wind pressure from the antenna using something like  
http://www.wikihow.com/Calculate-Wind-Load.
  A wind load of ~25 lb for that antenna should be very conservative.  Then sum 
the reactions (torques) at the base of the roof mount...the antenna imparts an 
overturning moment of ~250 ft-lb at the mast base, and so you ballast the mount 
to compensate for this.  The base of the frame is ~3' square, so the center of 
mass of cinder blocks which you'll use for ballast will be ~1.3' from the base 
of the mast, suggesting 180 lb of ballast should be enough.  Many installations 
use considerably less ballast and get away with it.  I happen to not like my 
masts to move (much).

The "gotcha" you should be aware of this that your roof must be able to support 
a ~200 lb load over an area of ~6 sq ft.  Of course, if it supports you, it 
likely will support the loading of this assemblage as well.

Best,
Dave

David Beyerle, P.E.
Communications Engineer, IEEE WCP
Penn State University
117 University Support Bldg 2
University Park PA  16802
da...@psu.edu
814 863-9432


From: "Mattson, III, Ken V" 
mailto:kenmatt...@creighton.edu>>
To: 
WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Sent: Monday, August 8, 2016 6:30:21 PM
Subject: [WIRELESS-LAN] Non penetrating roof mounted WiFi antenna

Has anyone roof mounted an AIR-ANT2588P3M-N antenna? Do you have pictures of 
the installation that you could share?  How high did you mount it? How much 
weight did you put on the base? We plan on putting it as high at 8-10 ft. on 
something like this:
http://www.cableandwireshop.com/non-penetrating-roof-mount-with-166-x-120-mast.html

Any gotchas we should be aware of?

Thanks for any assistance,

Kenneth V. Mattson III
Director - Network and Data
DoIT
Creighton University
402-280-2743
402-981-1140

A password is like a toothbrush:
Choose a good one, change it regularly and don't share it.
** 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/.

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Re: [WIRELESS-LAN] Non penetrating roof mounted WiFi antenna

[Samuel Clements]

And of course you'll want to make sure you can support the weight of the AP
along with it. Those outdoor units can be hefty. That is unless you're
using extension cables to hang the AP inside with the antenna outside. In
which case, proper sealing of all of your connectors, lightning arresting,
power protection, etc are all good 'non mount' gotchas you're going to want
to consider.
  -Sam

On Mon, Aug 8, 2016 at 7:06 PM, DAVID BEYERLE  wrote:

> Ken,
>
> First calculate the wind pressure from the antenna using something like
> http://www.wikihow.com/Calculate-Wind-Load.  A wind load of ~25 lb for
> that antenna should be *very* conservative.  Then sum the reactions
> (torques) at the base of the roof mount...the antenna imparts an
> overturning moment of ~250 ft-lb at the mast base, and so you ballast the
> mount to compensate for this.  The base of the frame is ~3' square, so the
> center of mass of cinder blocks which you'll use for ballast will be ~1.3'
> from the base of the mast, suggesting 180 lb of ballast should be enough.
> Many installations use considerably less ballast and get away with it.  I
> happen to not like my masts to move (much).
>
> The "gotcha" you should be aware of this that your roof must be able to
> support a ~200 lb load over an area of ~6 sq ft.  Of course, if it supports
> you, it likely will support the loading of this assemblage as well.
>
> Best,
> Dave
>
> David Beyerle, P.E.
> Communications Engineer, IEEE WCP
> Penn State University
> 117 University Support Bldg 2
> University Park PA  16802
> da...@psu.edu
> 814 863-9432 
>
> --
> *From: *"Mattson, III, Ken V" 
> *To: *WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
> *Sent: *Monday, August 8, 2016 6:30:21 PM
> *Subject: *[WIRELESS-LAN] Non penetrating roof mounted WiFi antenna
>
> Has anyone roof mounted an AIR-ANT2588P3M-N antenna? Do you have pictures
> of the installation that you could share?  How high did you mount it? How
> much weight did you put on the base? We plan on putting it as high at 8-10
> ft. on something like this:
>
> http://www.cableandwireshop.com/non-penetrating-roof-
> mount-with-166-x-120-mast.html
>
>
>
> Any gotchas we should be aware of?
>
>
>
> Thanks for any assistance,
>
>
>
> Kenneth V. Mattson III
> Director - Network and Data
> DoIT
> Creighton University
> 402-280-2743
> 402-981-1140
>
> A password is like a toothbrush:
> Choose a good one, change it regularly and don't share it.
> ** Participation and subscription information for this EDUCAUSE
> Constituent Group discussion list can be found at http://www.educause.edu/
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>
> ** Participation and subscription information for this EDUCAUSE
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