HP PROCURVE 6120 Management And Configuration Manual page 477

MAC Address "A"; VLAN 1
Server
MAC Address "A"; VLAN 2
Figure C-5. Example of Duplicate MAC Address
Unusual Network Activity
VLAN 1
8212zl Switch
(Multiple
Forwarding
Database)
VLAN 2
Problem: This switch detects
continual moves of MAC
address "A" between ports.
Troubleshooting
Switch with
Single
Forwarding
Database
C-23