H3C Technologies H3C WX5500E Series Access Controllers - Manual (Page 173)

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• Forbidden mode—Disables the trunk port from registering or withdrawing dynamic VLAN
information, and allows the port to send declarations only for VLAN 1. A trunk port in this mode
carries only VLAN 1 even if it has been assigned to other VLANs.
Protocols and standards
IEEE 802.1Q, Virtual Bridged Local Area Networks
GVRP configuration task list
GVRP configuration made in Ethernet interface view or Layer 2 aggregate interface view takes effect on
the current interface only. GVRP configuration made in port group view takes effect on all the member
ports in the group.
GVRP configuration made on a member port in an aggregation group takes effect only after the port is
removed from the aggregation group.
Complete these tasks to configure GVRP:
Task Remarks
Configuring GVRP functions Required
Configuring the GARP timers Optional
Configuring GVRP functions
This section describes how to configure GVRP functions.
Configuration restrictions and guidelines
• Before enabling GVRP on a port, you must enable GVRP globally. In addition, you can configure
GVRP only on trunk ports, and you must assign the involved trunk ports to all dynamic VLANs.
• GVRP is mutually exclusive with service loopback.
• GVRP can work with STP, RSTP, or MSTP CIST. When GVRP runs on the CIST, blocked ports on the
CIST cannot receive/send GVRP packets. For more information about STP, RSTP, and MSTP CIST,
see "Configuring spanning tree protocols."
• Do not enable both GVRP and remote port mirroring. Otherwise, GVRP may register the remote
probe VLAN to unexpected ports, which would cause the monitor port to receive undesired
duplicates. For more information about port mirroring, see Network Management and Monitoring
Configuration Guide.
• Enabling GVRP on a Layer 2 aggregate interface enables both the aggregate interface and all
selected member ports in the corresponding link aggregation group to participate in dynamic
VLAN registration and deregistration.