All,
(trying to help our systems group by asking this list)
Have any of you experienced DHCP issues due to too many machines requesting
leases?
We run two ISC DHCP servers (in Active-Active mode) with 30 minutes lease time
Running on SUN V440, no unusual I/O load, no unusual CPU load and
Hi Philippe,
Quick guess:
Did you check NTP time between both servers?
Kees
Hanset, Philippe C phan...@utk.edu 8/27/2012 8:19
All,
(trying to help our systems group by asking this list)
Have any of you experienced DHCP issues due to too many machines requesting
leases?
We run two ISC
We did last fall (ISC DHCP on Dell Servers running RedHat Enterprise
Linux). Although the CPU load was fine, we were having disk I/O issues
resulting in the server not responding to requests.
- Quick Fix was to bring up DHCP on additional boxes and spread the scopes
out.
- Long term fix consisted
We suppress our 802.1x SSID to prevent people from connecting to it before
they are properly configured. I have noticed 802.1x clients dropping back
to our open network on a regular basis. I am wondering if it is because of
the SSID broadcast suppression. Perhaps the broadcasted networks look
Phillip,
This is a bit outside my area of systems expertise, but I can tell you that we
designed our ISC DHCP servers from the beginning to keep their leases, config
and log files in a ramdisk because we found that while the system may not be
I/O bound, the single threaded nature of ISC dhcp
We notice that Mac OS always seems to jump back to our open network unless you
manually remove it. On Windows, our connection utility removes the open network
so that the students do not continue to use it.
Tim Cappalli, ACMP CCNA | (802) 626-6456
Office of Information Technology (OIT) |
We experienced this last year also on macs. We use XpressConnect which has the
ability to remove the profiles for the open networks. If you are an
Xpressconnect user, there is a setting for the latest build which activates
this solution even in the absence of Java. We just completed our opening
Randall,
Can you send me the path to getting to this setting? I haven't seen it yet and
I'm running the latest.
Matt
Matt Pendleton | Network Systems Administrator
University of Florida Department of Housing and Residence Education
PO Box 112100 | Gainesville, FL 32611-2100
office
In the Define Networks console, Select your Server. Right there in the intial
page is the Visual Setting section, Edit that and change the Mac MobileConfig
Behavior to Use only Java. Do not allow MobileConfig. - If java is not
installed, it will provide an alternative.
I also suggest using an
Randall,
Sorry for the confusion. I know of that setting (it was one we requested and
needed). I meant the removal of SSIDs in Macs. I haven't been able to find it
for Macs.
Matt
Matt Pendleton | Network Systems Administrator
University of Florida Department of Housing and Residence
click into the network definition for your server. In the summary section is
the setting for conflicting SSID's
This setting affects all OS. I list two semicolon delimited.
In the MacOS section under network settings, you also want to enable The SSID
needs to be first in the preferred SSID list.
No. we do not suppress the SSID.
Randall Grimshaw rgrim...@syr.edu
From: The EDUCAUSE Wireless Issues Constituent Group Listserv
[WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] on behalf of John Kaftan
[jkaf...@utica.edu]
Sent: Monday, August 27, 2012 4:47 PM
To:
Through our experience with large 802.1X networks, and as a best practice,
we do not recommend suppressing the secure SSID. For whatever reason
various clients, even when they are on the encrypted network, will try to
roam away when the SSID is not broadcast.
Thanks,
Curtis C. Reid
We had to abandon our Sun DHCP servers because of the same problem -- they just
couldn't keep up. We moved to a dedicated IP address management solution.
-jcw
-
John Watters UA: OIT 205-348-3992
-Original Message-
From: The EDUCAUSE Wireless
On Aug 27, 2012, at 4:47 PM, John Kaftan wrote:
Thank you for your help everyone.
Is anyone Suppressing your SSID for 802.1x like we are?
We are pretty tiny, so our solutions don't necessarily scale well, but
we've not hidden our 802.1x SSID. We've found that students who
haven't done
I assume you have ping-ahead turned off?
Frank
-Original Message-
From: The EDUCAUSE Wireless Issues Constituent Group Listserv
[mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Hanset, Philippe C
Sent: Monday, August 27, 2012 1:20 PM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Thank you all for the great suggestions.
I have forwarded all to our system group.
Thank you again,
Philippe
On Aug 27, 2012, at 10:17 PM, Frank Bulk frnk...@iname.com
wrote:
I assume you have ping-ahead turned off?
Frank
-Original Message-
From: The EDUCAUSE Wireless Issues
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