<div dir="ltr"><div>Short Story:</div><div>My AP's are having issues handing out IP's with DHCP. I am in no way a networking wizard and could use help diagnosing.</div><div><br></div><div>Long Story:</div><div>I installed two ubiquity AP's in the office last month. I started off really liking it, it was cheap, the range was better than the old routers I had, and the controller was nice to work with.</div>
<div><br></div><div>We have a small office with few wireless clients (around 10) and for a few weeks everything was hunky dory. Then people started coming back from vacation and I started having issues.</div><div><br></div>
<div>It seemed that when I get above 9 clients the last clients won't get ip addresses. Sometimes I can get 13 with valid ip addresses. Even clients with valid leases don't get ip addresses if I reset the AP and that client is one of the last to try getting an ip. It isn't consistent, in that sometimes a client connects but then loses it and sometimes a client don't connect but then half hour later it will connect. </div>
<div><br></div><div>I've been working with Ubiquiti (they don't seem all that knowledgeable) and last week they remoted in and we tried a bunch of different settings and even pulling the AP from one side of the office to right next to the other and we couldn't get above 13 clients. </div>
<div><br></div><div>One weird thing that happened during testing is that we had a device that had an ip address then lost it (according to the controller), but the device still had a valid ip address when I looked at the ip settings, so it didn't know it had lost the ip address. With this device I was able to ping our erp server and other ip addresses but I wasn't able to ping the DHCP server, then about 5 minutes later it couldn't ping anything.</div>
<div><br></div><div>They said it looks like an issue with the DHCP server and suggested increasing the address space. My IP lease range isn't full, but I could still increase the pool by about 70 addresses, which I did. Right now when I look at the controller I have 17 clients and only 1 doesn't have a valid ip address, but about half hour ago I had 18 clients and 3 not getting an ip address. So it got better, but still not right.</div>
<div><br></div><div>According to the Ubiquiti forums it seems that others have this issue and there isn't a fix in the forums.</div><div><br></div><div>Some more info:</div><div>My lease pool is 192.168.0.12-200 I have 97 open ip address I could hand out.</div>
<div>My DHCP server is windows 2008 rc2</div><div>The Windows 2008 rc2 is a client on VMware</div><div>The Ubiquiti controller is installed on the same windows server.</div><div>The network consists of cisco switches.</div>
<div>Wired devices have no issue getting ip addresses</div><div><br></div><div>So my questions:</div><div>Does DHCP need a certain % of open addresses in the pool?</div><div>Could it perhaps be an issue of having the Ubiquiti Controller on the same server as the DHCP server? - I could start up a linux server on VMWare and put the controller on that. I'm doing this right now(I just thought of this)</div>
<div>I understand that this is the Linux Group and this could possibly be a windows DHCP issue so is there a local windows group I could go to if you all think windows is the issue.</div><div>Could the Cisco switches be filtering or interfering somehow?</div>
<div><br></div><div>Share and Enjoy<br>Ben</div>
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