carsten wrote

Region : Germany

Model : TL-ER6120

Hardware Version : V1

Firmware Version : 1.0.2 Build 20120719 Rel.42888

ISP : Willy.Tel (Norderstedt, Germany)

Hej,

I'm the admin for a small to medium sized company, and we're having weird problems with our TL-ER6120.

The ER6120 is connected to our internet gateway via 100MBit fiber and servers routing and dhcp purposes for our 40-50 users (about 100-130 clients, we have a very open BYOD policy).

Now, last monday users began to complain that their "internet was broken", but only via wi-fi. Our Access Points are basically just a bridge to the wired network, so all the wireless clients get their IPs from the ER6120, too.

So I first figured it was a problem with the APs or the controller. But everything was okay, and soon after that some wired clients also began to drop. The clients simply did not get their DHCP information from the router.

The web interface of the 6120 showed CPU load of 20-50%, nothing to worry about, I thought. Interestingly, all our equipment with static IPs still had connection. But their connection was all flaky, with packet drops and some crazy spikes in ping times.

I disabled the DHCP Server on the ER6120 and set up a dedicated DHCP Server on another computer. BOOM - problems gone. Ping times are almost back to normal (ranging from 2 to 12 ms to our provider gateway, still somewhat wobbly).

So - has anyone else encountered this problem? I was always under the impression that a powerful SMB router like the 6120 could handle some petty DHCP requests.