ZyXEL MES3500-24 User Guide - Page 98
Automatic VLAN Registration
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Chapter 9 VLAN 9.2 Automatic VLAN Registration GARP and GVRP are the protocols used to automatically register VLAN membership across switches. 9.2.1 GARP GARP (Generic Attribute Registration Protocol) allows network switches to register and de-register attribute values with other GARP participants within a bridged LAN. GARP is a protocol that provides a generic mechanism for protocols that serve a more specific application, for example, GVRP. 9.2.1.1 GARP Timers Switches join VLANs by making a declaration. A declaration is made by issuing a Join message using GARP. Declarations are withdrawn by issuing a Leave message. A Leave All message terminates all registrations. GARP timers set declaration timeout values. 9.2.2 GVRP GVRP (GARP VLAN Registration Protocol) is a registration protocol that defines a way for switches to register necessary VLAN members on ports across the network. Enable this function to permit VLAN groups beyond the local Switch. Please refer to the following table for common IEEE 802.1Q VLAN terminology. Table 14 IEEE 802.1Q VLAN Terminology VLAN PARAMETER TERM DESCRIPTION VLAN Type Permanent VLAN This is a static VLAN created manually. VLAN Administrative Control VLAN Tag Control VLAN Port Dynamic VLAN Registration Fixed Registration Forbidden Normal Registration Tagged Untagged Port VID Acceptable Frame Type Ingress filtering This is a VLAN configured by a GVRP registration/deregistration process. Fixed registration ports are permanent VLAN members. Ports with registration forbidden are forbidden to join the specified VLAN. Ports dynamically join a VLAN using GVRP. Ports belonging to the specified VLAN tag all outgoing frames transmitted. Ports belonging to the specified VLAN don't tag all outgoing frames transmitted. This is the VLAN ID assigned to untagged frames that this port received. You may choose to accept both tagged and untagged incoming frames, just tagged incoming frames or just untagged incoming frames on a port. If set, the Switch discards incoming frames for VLANs that do not have this port as a member. 98 MES3500-24/24F User's Guide