<div dir="ltr">Thank you all for your help. Â I've moved the controller off the windows server and onto a linux (virtual)box. Â This did seem to help. Â I can now get up to 20ish clients. Â It still varies from 17-23 valid ip's. Â I am going to move the dhcp server to the same box today. Â I have a feeling that this will help, but not truly fix the issue. Â I believe that there is something randomly blocking access to this windows server.<div><br></div><div>Question:</div><div>What would cause a client to be randomly unable to access or ping a certain server on the network, while other clients have no issue pinging said server, nor does that client have an issue pinging other servers. Â It isn't just this laptop, I've witnessed this directly one other time a few weeks ago.</div><div><br></div><div>Background:</div><div>Today I had a sales manager come to me saying that his internet was going up and down all morning, but he has had a strong connection the whole time(from the little icon in the system tray). Â It was currently down so went over there and found that I couldn't ping the dns server, but I could ping other servers on the network. Â I tested with his phone and I could get to google(I think this verified the dns server was working and accessible to his phone)</div><div><br></div><div>Mmm, I thought, I have wireshark at my desk on the other side of the office(as if I knew how to use it). Â So I grabbed his laptop and went to my office. Â Alas, when I got to my desk the laptop was not having any issues with pinging the dns server anymore. Â I don't know if it was crossing into another AP (reconnecting to network), or just that it randomly started working.</div><div><br></div><div>Once I get the DHCP server on the linux box I'll truely see if my issue stops being getting an IP lease and starts to becoming a DNS issue.</div><div class="gmail_extra"><br clear="all"><div>Share and Enjoy<br>Ben</div>
<br><div class="gmail_quote">On Sat, Aug 30, 2014 at 11:05 AM, Godwin <span dir="ltr"><<a href="mailto:geektoyz@gmail.com" target="_blank" onclick="window.open('https://mail.google.com/mail/?view=cm&tf=1&to=geektoyz@gmail.com&cc=&bcc=&su=&body=','_blank');return false;">geektoyz@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><p dir="ltr">I'd setup a dhcp server on a separate Linux vm for testing. I too have the Controller on a Windows server, but dhcp is on a Linux server. <br>
Three APs managed (one local, two over VPN link) with multiple ssid's including a local guest (vlan) one with voucher needed. It's a beautiful thing. :) You can 'tail - f' the dhcp log and see if the requests are forwarded by the APs. </p><span class="HOEnZb"><font color="#888888">
<p dir="ltr">G-<br>
</p></font></span><div class="HOEnZb"><div class="h5">
<div class="gmail_quote">On Aug 28, 2014 1:41 PM, "Adam Tauno Williams" <<a href="mailto:awilliam@whitemice.org" target="_blank" onclick="window.open('https://mail.google.com/mail/?view=cm&tf=1&to=awilliam@whitemice.org&cc=&bcc=&su=&body=','_blank');return false;">awilliam@whitemice.org</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
On Thu, 2014-08-28 at 13:04 -0400, Benjamin Flanders wrote:<br>
> So my questions:<br>
> Does DHCP need a certain % of open addresses in the pool?<br>
<br>
Not "normal" DHCP, but I have only ever [and hope to only ever] use<br>
ISC's DHCP server - what is packaged with every LINUX distribution ever.<br>
<br>
> Could it perhaps be an issue of having the Ubiquiti Controller on the<br>
> same server as the DHCP server?<br>
<br>
No clue.<br>
<br>
>Â Â - I could start up a linux server on VMWare and put the controller<br>
> on that. I'm doing this right now(I just thought of this)<br>
<br>
Good plan.<br>
<br>
> I understand that this is the Linux Group and this could possibly be a<br>
> windows DHCP issue so is there a local windows group I could go to if<br>
> you all think windows is the issue.<br>
<br>
Can you wireshark the attempt to acquire a lease?<br>
<br>
> Could the Cisco switches be filtering or interfering somehow?<br>
<br>
They could be, but not likely, unless you have setup some filtering,<br>
etc..<br>
--<br>
Adam Tauno Williams <mailto:<a href="mailto:awilliam@whitemice.org" target="_blank" onclick="window.open('https://mail.google.com/mail/?view=cm&tf=1&to=awilliam@whitemice.org&cc=&bcc=&su=&body=','_blank');return false;">awilliam@whitemice.org</a>> GPG D95ED383<br>
Systems Administrator, Python Developer, LPI / NCLA<br>
<br>
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