Communication issues on some 1000Base-T ports on 9304m

[JM Kwong]

Has anyone seen something like this?

I have an 8-port gigabit module (J4842A) in a 9304m switch. The switch firmware is the latest (08.0.01cT53). I have no issues with port 5 to 8 on that module.

On ports 1 to 4, when I first connect a gigabit NIC all is fine. After a while (time is random), the link still shows green, but there is no communications across the port.
The only way I can get the port back properly is to disable and then re-enable the port via the 9304 console.

Other things don't seem to work: I have hard-coded the speed on the NIC, changed various brand of NICs, changed the patch cables.

Any help will be appreciated.

JM

[Matt Hobbs]

If you have tried the same devices that work fine on ports 5-8, on ports 1-4, then I would say the module is probably faulty and needs replacement.

Alternatively, did you have the same problem with the previous software release?

[JM Kwong]

Good point. I'll check with HP Support.

The problem also existed on older firmware.

Also, the link on those port seems to be more stable if I turn off "Checksum Offload" in the NIC advanced settings on the PC clients.