HP ProCurve J8162A Supplementary Manual page 16

Using 5300xl Features with the Access Controller xl Module
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When a port is added to a client VLAN the following changes are made to the
port:
Information used for ARP and MAC address processing is flushed.
If GVRP is enabled, it is disabled and a message is displayed.
If LACP passive is configured, it is disabled and a message is
displayed.
Downlink client ports must be members of some other VLAN before they can
be removed from a client VLAN. If you use the no access-controller <slot-id>
client-ports [e] <port-list> command to remove an untagged downlink client
port with no other VLAN memberships from a client VLAN, the port is
automatically placed in the DEFAULT-VLAN as an untagged member. If you
attempt to remove a tagged downlink client port that belongs to no other
VLAN, the removal fails. Add the port to another VLAN, then delete it from the
client VLAN.
Client VLANs can be configured without specifying any switch ports using the
access-controller <slot-id> client-ports vlan <vlan-list> command from the con-
figuration context. The VLANs are created with only the downlink port,
<slot-id>DP, as a tagged member. Later you can use VLAN commands from the
5300xl CLI to add switch ports to this VLAN as downlink client ports.