Vmunix alet-- Error message

[Adithyan]

Hi All,

In my server the following error comes.

GE2001A Sep 9 04:00:11 nnmp03 vmunix: USB frame sequencing 0x3c018dc to 0x3bfac29 (Event Log File Line) GE2001A vmunix

Any idea what would be the reason?

Thanks
Adithyan

[Adithyan]

The OS ver is HP ux11.11.

[Steven E. Protter]

Shalom Adithyan,

What usb devices have you got hooked up?

As far as I remember, only keyboard and mouse are supported on this OS.

SEP

[Adithyan]

Hi Steven,

No USB devices have been plugged as far as my knowledge. And the same messages are coming in around on 8 servers. The server model is Model:9000/800/rp3440. Is there anything else I can look for?

Thanks

[whiteknight]

Hi Adi,

FYI, this is nothing to concern.
This is not a critical messages. These messages are generated because of
frame sequence numbers being missed. These frame numbers are most likely
missed due to network collisions.

Collisions are not possible on a USB bus. The whole communication is strictly
controlled and initiated by the host bus controller. The host controller
generates a start of frame packet every one milli-second. The host controller
keeps track of the sequence numbers in a register (reset the driver internal
sequence numbers). The piece of code is there to allow us to detect when we
missed the USB interrupt for this sequence number register wrap around. It is
not clear why this interrupt was missed but the event itself is not considered
a severe problem.

WK
please assign points

[Adithyan]

Hi WK,

If collision is not possible in USB, How come this message comes? There is not USB devices attached to these servers. And the same message is there in several servers in the cluster nodes. This server is a part of 6 node cluster.