Gvrp Packet Format - H3C S7500 Series Operation Manual

Operation Manual – GVRP
H3C S7500 Series Ethernet Switches
Normal: In this mode, a port can dynamically register/deregister a VLAN and
propagate the dynamic/static VLAN information.
Fixed: In this mode, a port cannot register/deregister a VLAN dynamically. It only
propagates static VLAN information. That is, a trunk port only permits the packets
of manually configured VLANs in this mode even if you configure the port to permit
the packets of all the VLANs.
Forbidden: In this mode, a port cannot register/deregister VLANs. It only
propagates VLAN 1 information. That is, a trunk port only permits the packets of
the default VLAN (namely VLAN 1) in this mode even if you configure the port to
permit the packets of all the VLANs.
III. GARP operation procedure
Through the mechanism of GARP, the configuration information on a GARP member
will be propagated to the entire switched network. A GARP can be a terminal
workstation or a bridge; it instructs other GARP member to register/unregister its
attribute information by declaration/recant, and register/unregister other GARP
member's attribute information according to other member's declaration/recant.
The protocol packets of GARP entity use specific multicast MAC addresses as their
destination MAC addresses. When receiving these packets, the switch distinguishes
them by their destination MAC addresses and delivers them to different GARP
application (for example, GVRP) for further processing.

1.1.3 GVRP Packet Format

The GVRP packets are in the following format:
Figure 1-1 Format of GVRP packets
The following table describes the fields of a GVRP packet.
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Chapter 1 GVRP Configuration