I have a laptop I've used for several years while configuring AP1230's in the field. A couple of weeks ago, it suddenly stopped being able to use AP1230's as WGB's. When connected to the AP1230's Ethernet port, they can see each other just fine - but the laptop's traffic is not passed through the WGB to the AP (another AP1230 as root bridge).
To be more precise, the laptop can ping the WGB 100%. However, the laptop loses about 98% of pings to the root bridge. Not all of them, just most.
Using ANY other laptop/desktop in place of the problem laptop works perfectly. Inserting an Ethernet switch between the laptop and WGB does not fix it (but other devices simultaneously plugged into the same Eswitch work perfectly).
Just a problem on the laptop's Ethernet port, right? Except... if you bypass the bridges and plug it directly into the LAN, it works perfectly. Hubs, switches, directly into router interfaces - it works with everything except that it can no longer reliably pass IP traffic over a AP1200 bridge.
I've confirmed that the laptop is getting ARP for the root bridge and upstream devices, so traffic is passing through the WGB and the RF link. But pings and other TCP/IP traffic isn't reliable. It's not **completely** dead... for example, every time you start a fresh ping test, generally the first test comes back successful and then the timeouts start. Minutes later you'll get 4-5 successful pings in a row, then more minutes of total losses.
I've tried several different AP1230's on both ends. I've tried several versions of IOS on them. I've tried forcing speed and duplex on both ends of the Ethernet connection. Nothing makes any difference.
Interestingly, replace the AP1230 in WGB mode with an el-cheapo Linksys WET11 and the laptop works perfectly (note that the AP1230 in root bridge mode is still on the other end). So there's nothing inherently wrong with the laptop working over an RF link; it only complains if its end of the bridge is an AP1230.
Given this situation, I can use the laptop to configure WGB's - but then I can't use it to test them! It can see devices on its side of the WGB but cannot see the other bridge nor anything beyond it. Meanwhile, other devices work just fine... and the laptop works fine in any other environment.
There must be some sort of configuration detail I'm missing on the WGB or the laptop. Something that makes them incompatible. Any hints, test suggestions, or ideas will be greatly appreciated. This is driving me crazy.