ZyXEL VES1724-56B2 User Guide - Page 130
Automatic VLAN Registration
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Chapter 10 VLAN 10.1.2 VLAN Tagging Priority When the Switch is IEEE 802.1Q VLAN-enabled, all incoming tagged traffic is forwarded according to the VLAN table on the Switch. If the incoming traffic is untagged, the Switch applies the VLAN rules based on the following priority: MAC-based VLAN > Subnet-based VLAN > Protocol-based VLAN > PVID 10.2 Automatic VLAN Registration GARP and GVRP are the protocols used to automatically register VLAN membership across switches. 10.2.1 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. 10.2.1.1 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 Declarations are withdrawn by issuing a Leave message.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. 10.2.2 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 47 IEEE 802.1Q VLAN Terminology VLAN PARAMETER TERM VLAN Type Permanent VLAN DESCRIPTION This is a static VLAN created manually. VLAN Administrative Control VLAN Tag Control Dynamic VLAN Registration Fixed Registration Forbidden Normal Registration Tagged Untagged 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. 130 VES1724-56 User's Guide