HP J3245A Installation And Configuration Manual page 128

Advanced Concepts
Virtual LANs (VLANs)
HP Router Requirements. Use the Hewlett-Packard version A.09.70 (or
later) router OS release if any of the following Hewlett-Packard routers are
installed in networks in which you will be using VLANs:
Release A.09.70 (or later) is available electronically through the HP BBS
service and the World Wide Web. Refer to the "Customer Support Services"
card at the beginning of this manual.
Symptoms of Duplicate MAC Addresses in VLAN
Environments
There are no definitive events or statistics to indicate the presence of duplicate
MAC addresses in a VLAN environment. However, one symptom that may
occur is that a duplicate MAC address can appear in the Port Address Table
screen to be linked with one port, and then later appear to be linked to another
port.
7-22
HP Router 440 (formerly Router ER)
HP Router 470 (formerly Router LR)
HP Router 480 (formerly Router BR)
HP Router 650