Broken switch?

[mhw]

Hi,

I have an HP Procurve 1800-8g as the main switch in my network. I have many times wondered why all the port-lights seemed to be blinking at the same time, but have just thought that it was a lot of broadcast traffic.

But today I separated my LAN in several VLANs as Doug Reid explains in his article. After I had done this, I saw that all the port-lights blinked at the same time, even though they were on different VLANs! So I hooked up my computer to one port, and fired up wireshark, and saw that I received a lot of packets that were going to and from my server. I then replaced the HP switch with an dumb, unmanaged Netgear switch, and then I didn't receive any such packets...

So, it seems to me that the HP switch is working as a hub, just reproducing every packet on every port... I have looked through the web interface, and checked that I haven't mirrored any ports, or anything else that I can understand has this effect. Is the MAC-address list broken somehow?

I was separating my LAN to provide guest access to the Internet only, not my network - so the fact that packets are sent to that VLAN is not desirable...

What do you guys think? Thanks for any help!

 

[thiggins]

I'd check to make sure you didn't create any loops.

If you remove the VLANs and the switch works ok, then it's something with your VLAN configuration.