Does anybody know, what the field "Bus overruns" in the output of the ifstat command means?

I see a lot of Bus overrun errors on all filer interfaces (GbE). Our filer works with ONTAP 6.1.1R1 and a Cisco 6500 Switch.

Horst Thaller Infineon Technologies Microelectronic Design Centers Austria GmbH Design Center Villach Siemensstrasse 2, A-9500 Villach Tel. ++43 4242 305-6212 Fax ++43 4242 305-6389 email: Horst.Thaller@infineon.com internet: www.infineon.com/ezmvi