VLAN configuration rules
VLANs operate according to specific configuration rules which must be considered when creating VLANs.
HP recommends that all ports involved in trunking and Port Mirroring have the same VLAN
configuration. If a port is on a trunk with a mirroring port, the VLAN configuration cannot be
changed. For more information on port trunking, see the "Port trunking example" section in the "Ports
and trunking" chapter.
All ports that are involved in Port Mirroring must have memberships in the same VLANs. If a port is
configured for Port Mirroring, the port's VLAN membership cannot be changed. For more
information on configuring Port Mirroring, see the "Port Mirroring" section in the "Troubleshooting
When you delete a VLAN, untagged ports are moved to the default VLAN (VLAN 1). Tagged ports
that belong only to the deleted VLAN are moved to the default VLAN 1. Tagged ports that belong to
multiple VLANs are removed from the deleted VLAN only.
Multiple VLANS with tagging
The following figure shows only those switch port to server links that must be configured for the example.
While not shown, all other server links remain set at their default settings.