Re: [WIRELESS-LAN] Odd behavior on Aruba wireless network

2016-11-14 Thread Frans Panken 
Hi Mark,
Is it possible that you have mulple VLANs that do not remain consistent if the 
client roams to another AP? It is mapped to another VLAN and hence requests an 
IP address for this new VLAN?
-Frans


From: The EDUCAUSE Wireless Issues Constituent Group Listserv 
<WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> on behalf of "Mark McNeil [Staff]" 
<mcn...@fordham.edu>
Reply-To: The EDUCAUSE Wireless Issues Constituent Group Listserv 
<WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>
Date: Monday, 14 November 2016 at 15:08
To: "WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU" <WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>
Subject: Re: [WIRELESS-LAN] Odd behavior on Aruba wireless network

Atanas,
  The IP addresses are on different subnets. We have the controller cycling 
through vlans. We did a test with the one lease per client and it seems to have 
reduced the distribution of multiple IP's per client. We will enable this week 
and see what happens. Unfortunately we do not have reporting on the Infoblox to 
show us the long term distribution.

Thanks for your input.

Regards

Mark

On Fri, Nov 11, 2016 at 12:32 PM, Atanas P Atanasov 
<apata...@syr.edu<mailto:apata...@syr.edu>> wrote:
Your best bet would be to talk to Infoblox’ support.
Are the IPs your clients are getting on the same subnet?

Atanas

From: The EDUCAUSE Wireless Issues Constituent Group Listserv 
[mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>]
 On Behalf Of Mark McNeil [Staff]
Sent: Friday, November 11, 2016 12:22 PM
To: 
WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>
Subject: Re: [WIRELESS-LAN] Odd behavior on Aruba wireless network

Atanas,
  Actually it is not enabled. If I'm reading the description correctly this 
would "expire" the old lease and issue a new one to the user. This would seem 
to fix my issue. Infoblox manual says this is off by default. It would seem 
preferable to have this enabled by default. Any idea why its off by default?

Thanks

Mark

On Fri, Nov 11, 2016 at 11:02 AM, Atanas P Atanasov 
<apata...@syr.edu<mailto:apata...@syr.edu>> wrote:
Mark,

Do you have “one lease per client” enabled?

Atanas Atanasov
Network Analyst
Syracuse University

[cid:image001.png@01D23EB3.B24A0830]

From: The EDUCAUSE Wireless Issues Constituent Group Listserv 
[mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>]
 On Behalf Of Mark McNeil [Staff]
Sent: Friday, November 11, 2016 10:50 AM
To: 
WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>
Subject: [WIRELESS-LAN] Odd behavior on Aruba wireless network

I have an implementation of Alcatel/Aruba wireless. We've been trying to manage 
out DHCP pool as it hits 90 precent quite often. We are seeing this strange 
behavior in that a single user within a short period of time is associating and 
disassociating and as such gets new IP address. The DHCP server is retaining 
the old IP as being active so does not redistribute for 30 minutes. The 
examples I list below show two  to three IP addresses being given out from the 
same AP in a few minute period. We've seen IP address changes in less that 30 
seconds on a regular basis.

This issue seem to occur in areas of good coverage as well as in marginal areas.
​Lan IP Address ​  Association time   Duration  
   Avg. Speed

172.21.34.49, 172.21.52.16
​11/10/16, 4:25  PM 2 minutes  122Mps​

172.21.59.221, 172.21.45.117,

172.21.52.217
​  11/9/16, 11:57 AM 5 minutes   ​

​
DHCP server is from Infoblox

Any thoughts.

Regards
Mark

​


 ​




--

Mark McNeil
Director, Network Engineering and Operations
Fordham University | Fordham IT
Tel: 718-817-3763
Business Office: 718-817-3750
Fax: 718-817-5775
email: mcn...@fordham.edu<mailto:mcn...@fordham.edu> <http://www.fordham.edu/>
http://www.fordham.edu<http://www.fordham.edu/>
_
** Participation and subscription information for this EDUCAUSE 
Constituent Group discussion list can be found at 
http://www.educause.edu/groups/<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.educause.edu_groups_=DQMGaQ=aqMfXOEvEJQh2iQMCb7Wy8l0sPnURkcqADc2guUW8IM=SpuW56Gv0ljO5PHKQquxycZWXdpeoXD-65qTCRfbCJA=l8GOIDXdpS77V-faqCbvnbD-DSqOe66HZ6Zx5ZrUBfU=AMiYbxkHDUcEegjlwV-kbY7zStwlNwQLMidqZX1zeGI=>.
** Participation and subscription information for this EDUCAUSE 
Constituent Group discussion list can be found at 
http://www.educause.edu/groups/<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.educause.edu_groups_=DQMGaQ=aqMfXOEvEJQh2iQMCb7Wy8l0sPnURkcqADc2guUW8IM=SpuW56Gv0ljO5PHKQquxycZWXdpeoXD-65qTCRfbCJA=l8GOIDXdpS77V-faqCbvnbD-DSqOe66HZ6Zx5ZrUBfU=AMiYbxkHDUcEegjlw

Re: [WIRELESS-LAN] Odd behavior on Aruba wireless network

2016-11-14 Thread Mark McNeil [Staff] 
Atanas,
  The IP addresses are on different subnets. We have the controller
cycling through vlans. We did a test with the one lease per client and it
seems to have reduced the distribution of multiple IP's per client. We will
enable this week and see what happens. Unfortunately we do not have
reporting on the Infoblox to show us the long term distribution.

Thanks for your input.

Regards

Mark

On Fri, Nov 11, 2016 at 12:32 PM, Atanas P Atanasov <apata...@syr.edu>
wrote:

> Your best bet would be to talk to Infoblox’ support.
>
> Are the IPs your clients are getting on the same subnet?
>
>
>
> Atanas
>
>
>
> *From:* The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:
> WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] *On Behalf Of *Mark McNeil [Staff]
> *Sent:* Friday, November 11, 2016 12:22 PM
> *To:* WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
> *Subject:* Re: [WIRELESS-LAN] Odd behavior on Aruba wireless network
>
>
>
> Atanas,
>
>   Actually it is not enabled. If I'm reading the description correctly
> this would "expire" the old lease and issue a new one to the user. This
> would seem to fix my issue. Infoblox manual says this is off by default. It
> would seem preferable to have this enabled by default. Any idea why its off
> by default?
>
>
>
> Thanks
>
>
>
> Mark
>
>
>
> On Fri, Nov 11, 2016 at 11:02 AM, Atanas P Atanasov <apata...@syr.edu>
> wrote:
>
> Mark,
>
>
>
> Do you have “one lease per client” enabled?
>
>
>
> Atanas Atanasov
>
> Network Analyst
>
> Syracuse University
>
>
>
>
>
> *From:* The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:
> WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] *On Behalf Of *Mark McNeil [Staff]
> *Sent:* Friday, November 11, 2016 10:50 AM
> *To:* WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
> *Subject:* [WIRELESS-LAN] Odd behavior on Aruba wireless network
>
>
>
> I have an implementation of Alcatel/Aruba wireless. We've been trying to
> manage out DHCP pool as it hits 90 precent quite often. We are seeing this
> strange behavior in that a single user within a short period of time is
> associating and disassociating and as such gets new IP address. The DHCP
> server is retaining the old IP as being active so does not redistribute for
> 30 minutes. The examples I list below show two  to three IP addresses being
> given out from the same AP in a few minute period. We've seen IP address
> changes in less that 30 seconds on a regular basis.
>
>
>
> This issue seem to occur in areas of good coverage as well as in marginal
> areas.
>
> ​Lan IP Address ​  Association time
> Duration Avg. Speed
>
> *172.21.34.49, 172.21.52.16*
>
> *​*11/10/16, 4:25  PM 2 minutes  122Mps​
>
> *172.21.59.221, 172.21.45.117, *
>
> *172.21.52.217*
>
> *​ * 11/9/16, 11:57 AM 5 minutes
>   ​
>
> ​
>
> DHCP server is from Infoblox
>
>
>
> Any thoughts.
>
>
>
> Regards
>
> Mark
>
> ​
>
>
>
>  ​
>
>
>
> --
>
> 
> *Mark McNeil  *
> *Director, Network Engineering and Operations*
> *Fordham University | Fordham IT*
> *Tel: 718-817-3763*
> *Business Office: 718-817-3750*
> *Fax: 718-817-5775*
> *email: mcn...@fordham.edu <mcn...@fordham.edu>*
> <http://www.fordham.edu/>
> *http://www.fordham.edu <http://www.fordham.edu/>*
> _
>
> ** Participation and subscription information for this EDUCAUSE
> Constituent Group discussion list can be found at http://www.educause.edu/
> groups/
> <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.educause.edu_groups_=DQMGaQ=aqMfXOEvEJQh2iQMCb7Wy8l0sPnURkcqADc2guUW8IM=SpuW56Gv0ljO5PHKQquxycZWXdpeoXD-65qTCRfbCJA=l8GOIDXdpS77V-faqCbvnbD-DSqOe66HZ6Zx5ZrUBfU=AMiYbxkHDUcEegjlwV-kbY7zStwlNwQLMidqZX1zeGI=>.
>
>
> ** Participation and subscription information for this EDUCAUSE
> Constituent Group discussion list can be found at http://www.educause.edu/
> groups/
> <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.educause.edu_groups_=DQMGaQ=aqMfXOEvEJQh2iQMCb7Wy8l0sPnURkcqADc2guUW8IM=SpuW56Gv0ljO5PHKQquxycZWXdpeoXD-65qTCRfbCJA=l8GOIDXdpS77V-faqCbvnbD-DSqOe66HZ6Zx5ZrUBfU=AMiYbxkHDUcEegjlwV-kbY7zStwlNwQLMidqZX1zeGI=>.
>
>
>
>
>
>
> --
>
> 
> *Mark McNeil  *
> *Director, Network Engineering and Operations*
> *Fordham University | Fordham IT*
> *Tel: 718-817-3763*
> *Busines

Re: [WIRELESS-LAN] Odd behavior on Aruba wireless network

2016-11-11 Thread Jeremy Mooney 
This is speculation, but based only on the wording of the option it could
cause issues if you have devices with multiple interfaces in separate
networks with the same MAC (opinion on this varies, but it's allowed and
possibly even recommended vs MAC-per-interface). Also if you have any
currently hidden (by being in different locations)
manufacturer-duplicated-MACs, but those are a problem waiting to happen
otherwise anyways. Those two could easily be support headaches, plus it's
another check to process on every lease and it really only is needed if
you're trying to tightly optimize pool usage.

On Fri, Nov 11, 2016 at 11:22 AM, Mark McNeil [Staff] 
wrote:

> Atanas,
>   Actually it is not enabled. If I'm reading the description correctly
> this would "expire" the old lease and issue a new one to the user. This
> would seem to fix my issue. Infoblox manual says this is off by default. It
> would seem preferable to have this enabled by default. Any idea why its off
> by default?
>
> Thanks
>
> Mark
>
> On Fri, Nov 11, 2016 at 11:02 AM, Atanas P Atanasov 
> wrote:
>
>> Mark,
>>
>>
>>
>> Do you have “one lease per client” enabled?
>>
>>
>>
>> Atanas Atanasov
>>
>> Network Analyst
>>
>> Syracuse University
>>
>>
>>
>>
>>
>> *From:* The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:
>> WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] *On Behalf Of *Mark McNeil [Staff]
>> *Sent:* Friday, November 11, 2016 10:50 AM
>> *To:* WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
>> *Subject:* [WIRELESS-LAN] Odd behavior on Aruba wireless network
>>
>>
>>
>> I have an implementation of Alcatel/Aruba wireless. We've been trying to
>> manage out DHCP pool as it hits 90 precent quite often. We are seeing this
>> strange behavior in that a single user within a short period of time is
>> associating and disassociating and as such gets new IP address. The DHCP
>> server is retaining the old IP as being active so does not redistribute for
>> 30 minutes. The examples I list below show two  to three IP addresses being
>> given out from the same AP in a few minute period. We've seen IP address
>> changes in less that 30 seconds on a regular basis.
>>
>>
>>
>> This issue seem to occur in areas of good coverage as well as in marginal
>> areas.
>>
>> ​Lan IP Address ​  Association time
>> Duration Avg. Speed
>>
>> *172.21.34.49, 172.21.52.16*
>>
>> *​*11/10/16, 4:25  PM 2 minutes  122Mps​
>>
>> *172.21.59.221, 172.21.45.117, *
>>
>> *172.21.52.217*
>>
>> *​ * 11/9/16, 11:57 AM 5 minutes
>>   ​
>>
>> ​
>>
>> DHCP server is from Infoblox
>>
>>
>>
>> Any thoughts.
>>
>>
>>
>> Regards
>>
>> Mark
>>
>> ​
>>
>>
>>
>>  ​
>>
>>
>>
>> --
>>
>> 
>> *Mark McNeil  *
>> *Director, Network Engineering and Operations*
>> *Fordham University | Fordham IT*
>> *Tel: 718-817-3763 <718-817-3763>*
>> *Business Office: 718-817-3750 <718-817-3750>*
>> *Fax: 718-817-5775 <718-817-5775>*
>> *email: mcn...@fordham.edu *
>> 
>> *http://www.fordham.edu *
>> _
>>
>> ** 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/
>> .
>>
>>
>>
>
>
> --
> 
> *Mark McNeil  *
> *Director, Network Engineering and Operations*
> *Fordham University | Fordham IT*
> *Tel: 718-817-3763 <718-817-3763>*
> *Business Office: 718-817-3750 <718-817-3750>*
> *Fax: 718-817-5775 <718-817-5775>*
> *email: mcn...@fordham.edu *
> 
> *http://www.fordham.edu *
> _
> ** Participation and subscription information for this EDUCAUSE
> Constituent Group discussion list can be found at http://www.educause.edu/
> groups/.
>
>


-- 
Jeremy Mooney
ITS - Bethel University

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

RE: [WIRELESS-LAN] Odd behavior on Aruba wireless network

2016-11-11 Thread Atanas P Atanasov 
Your best bet would be to talk to Infoblox’ support.
Are the IPs your clients are getting on the same subnet?

Atanas

From: The EDUCAUSE Wireless Issues Constituent Group Listserv 
[mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Mark McNeil [Staff]
Sent: Friday, November 11, 2016 12:22 PM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: Re: [WIRELESS-LAN] Odd behavior on Aruba wireless network

Atanas,
  Actually it is not enabled. If I'm reading the description correctly this 
would "expire" the old lease and issue a new one to the user. This would seem 
to fix my issue. Infoblox manual says this is off by default. It would seem 
preferable to have this enabled by default. Any idea why its off by default?

Thanks

Mark

On Fri, Nov 11, 2016 at 11:02 AM, Atanas P Atanasov 
<apata...@syr.edu<mailto:apata...@syr.edu>> wrote:
Mark,

Do you have “one lease per client” enabled?

Atanas Atanasov
Network Analyst
Syracuse University

[cid:image001.png@01D23C17.BAF839F0]

From: The EDUCAUSE Wireless Issues Constituent Group Listserv 
[mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>]
 On Behalf Of Mark McNeil [Staff]
Sent: Friday, November 11, 2016 10:50 AM
To: 
WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>
Subject: [WIRELESS-LAN] Odd behavior on Aruba wireless network

I have an implementation of Alcatel/Aruba wireless. We've been trying to manage 
out DHCP pool as it hits 90 precent quite often. We are seeing this strange 
behavior in that a single user within a short period of time is associating and 
disassociating and as such gets new IP address. The DHCP server is retaining 
the old IP as being active so does not redistribute for 30 minutes. The 
examples I list below show two  to three IP addresses being given out from the 
same AP in a few minute period. We've seen IP address changes in less that 30 
seconds on a regular basis.

This issue seem to occur in areas of good coverage as well as in marginal areas.
​Lan IP Address ​  Association time   Duration  
   Avg. Speed

172.21.34.49, 172.21.52.16
​11/10/16, 4:25  PM 2 minutes  122Mps​

172.21.59.221, 172.21.45.117,

172.21.52.217
​  11/9/16, 11:57 AM 5 minutes   ​

​
DHCP server is from Infoblox

Any thoughts.

Regards
Mark

​


 ​




--

Mark McNeil
Director, Network Engineering and Operations
Fordham University | Fordham IT
Tel: 718-817-3763
Business Office: 718-817-3750
Fax: 718-817-5775
email: mcn...@fordham.edu<mailto:mcn...@fordham.edu> <http://www.fordham.edu/>
http://www.fordham.edu<http://www.fordham.edu/>
_
** Participation and subscription information for this EDUCAUSE 
Constituent Group discussion list can be found at 
http://www.educause.edu/groups/<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.educause.edu_groups_=DQMGaQ=aqMfXOEvEJQh2iQMCb7Wy8l0sPnURkcqADc2guUW8IM=SpuW56Gv0ljO5PHKQquxycZWXdpeoXD-65qTCRfbCJA=l8GOIDXdpS77V-faqCbvnbD-DSqOe66HZ6Zx5ZrUBfU=AMiYbxkHDUcEegjlwV-kbY7zStwlNwQLMidqZX1zeGI=>.
** Participation and subscription information for this EDUCAUSE 
Constituent Group discussion list can be found at 
http://www.educause.edu/groups/<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.educause.edu_groups_=DQMGaQ=aqMfXOEvEJQh2iQMCb7Wy8l0sPnURkcqADc2guUW8IM=SpuW56Gv0ljO5PHKQquxycZWXdpeoXD-65qTCRfbCJA=l8GOIDXdpS77V-faqCbvnbD-DSqOe66HZ6Zx5ZrUBfU=AMiYbxkHDUcEegjlwV-kbY7zStwlNwQLMidqZX1zeGI=>.



--

Mark McNeil
Director, Network Engineering and Operations
Fordham University | Fordham IT
Tel: 718-817-3763
Business Office: 718-817-3750
Fax: 718-817-5775
email: mcn...@fordham.edu<mailto:mcn...@fordham.edu> <http://www.fordham.edu/>
http://www.fordham.edu<http://www.fordham.edu/>
_
** 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] Odd behavior on Aruba wireless network

2016-11-11 Thread Mark McNeil [Staff] 
Atanas,
  Actually it is not enabled. If I'm reading the description correctly
this would "expire" the old lease and issue a new one to the user. This
would seem to fix my issue. Infoblox manual says this is off by default. It
would seem preferable to have this enabled by default. Any idea why its off
by default?

Thanks

Mark

On Fri, Nov 11, 2016 at 11:02 AM, Atanas P Atanasov 
wrote:

> Mark,
>
>
>
> Do you have “one lease per client” enabled?
>
>
>
> Atanas Atanasov
>
> Network Analyst
>
> Syracuse University
>
>
>
>
>
> *From:* The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:
> WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] *On Behalf Of *Mark McNeil [Staff]
> *Sent:* Friday, November 11, 2016 10:50 AM
> *To:* WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
> *Subject:* [WIRELESS-LAN] Odd behavior on Aruba wireless network
>
>
>
> I have an implementation of Alcatel/Aruba wireless. We've been trying to
> manage out DHCP pool as it hits 90 precent quite often. We are seeing this
> strange behavior in that a single user within a short period of time is
> associating and disassociating and as such gets new IP address. The DHCP
> server is retaining the old IP as being active so does not redistribute for
> 30 minutes. The examples I list below show two  to three IP addresses being
> given out from the same AP in a few minute period. We've seen IP address
> changes in less that 30 seconds on a regular basis.
>
>
>
> This issue seem to occur in areas of good coverage as well as in marginal
> areas.
>
> ​Lan IP Address ​  Association time
> Duration Avg. Speed
>
> *172.21.34.49, 172.21.52.16*
>
> *​*11/10/16, 4:25  PM 2 minutes  122Mps​
>
> *172.21.59.221, 172.21.45.117, *
>
> *172.21.52.217*
>
> *​ * 11/9/16, 11:57 AM 5 minutes
>   ​
>
> ​
>
> DHCP server is from Infoblox
>
>
>
> Any thoughts.
>
>
>
> Regards
>
> Mark
>
> ​
>
>
>
>  ​
>
>
>
> --
>
> 
> *Mark McNeil  *
> *Director, Network Engineering and Operations*
> *Fordham University | Fordham IT*
> *Tel: 718-817-3763*
> *Business Office: 718-817-3750*
> *Fax: 718-817-5775*
> *email: mcn...@fordham.edu *
> 
> *http://www.fordham.edu *
> _
>
> ** 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/
> .
>
>
>


-- 

*Mark McNeil  *
*Director, Network Engineering and Operations*
*Fordham University | Fordham IT*
*Tel: 718-817-3763*
*Business Office: 718-817-3750*
*Fax: 718-817-5775*
*email: mcn...@fordham.edu *  
*http://www.fordham.edu *
_

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

RE: [WIRELESS-LAN] Odd behavior on Aruba wireless network

2016-11-11 Thread Atanas P Atanasov 
Mark,

Do you have “one lease per client” enabled?

Atanas Atanasov
Network Analyst
Syracuse University

[cid:image001.png@01D23C0B.1909B8A0]

From: The EDUCAUSE Wireless Issues Constituent Group Listserv 
[mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Mark McNeil [Staff]
Sent: Friday, November 11, 2016 10:50 AM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: [WIRELESS-LAN] Odd behavior on Aruba wireless network

I have an implementation of Alcatel/Aruba wireless. We've been trying to manage 
out DHCP pool as it hits 90 precent quite often. We are seeing this strange 
behavior in that a single user within a short period of time is associating and 
disassociating and as such gets new IP address. The DHCP server is retaining 
the old IP as being active so does not redistribute for 30 minutes. The 
examples I list below show two  to three IP addresses being given out from the 
same AP in a few minute period. We've seen IP address changes in less that 30 
seconds on a regular basis.

This issue seem to occur in areas of good coverage as well as in marginal areas.
​Lan IP Address ​  Association time   Duration  
   Avg. Speed

172.21.34.49, 172.21.52.16
​11/10/16, 4:25  PM 2 minutes  122Mps​

172.21.59.221, 172.21.45.117,

172.21.52.217
​  11/9/16, 11:57 AM 5 minutes   ​

​
DHCP server is from Infoblox

Any thoughts.

Regards
Mark

​


 ​




--

Mark McNeil
Director, Network Engineering and Operations
Fordham University | Fordham IT
Tel: 718-817-3763
Business Office: 718-817-3750
Fax: 718-817-5775
email: mcn...@fordham.edu 
http://www.fordham.edu
_
** 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/.