ZyXEL ES-2108PWR User Guide - Page 88
Automatic VLAN Registration
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Chapter 8 VLAN 8.2 Automatic VLAN Registration GARP and GVRP are the protocols used to automatically register VLAN membership across switches. 8.2.1 GARP GARP (Generic Attribute Registration Protocol) allows network switches to register and deregister 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. 8.2.1.1 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 Declarations are withdrawn by issuing a Leave message.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. 8.2.2 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 VLANs groups beyond the local Switch. Please refer to the following table for common GARP terminology. Table 14 IEEE 802.1q Terminology VLAN PARAMETER TERM DESCRIPTION VLAN Type Permanent VLAN This is a static VLAN created manually. Dynamic VLAN This is a VLAN configured by a GVRP registration/ deregistration process. VLAN Administrative Registration Fixed Fixed registration ports are permanent VLAN members. Control Registration Forbidden Ports with registration forbidden are forbidden to join the specified VLAN. Normal Registration Ports dynamically join a VLAN using GVRP. VLAN Tag Control Tagged Ports belonging to the specified VLAN tag all outgoing frames transmitted. Untagged Ports belonging to the specified don't tag all outgoing frames transmitted. VLAN Port Port VID This is the VLAN ID assigned to untagged frames that this port received. Acceptable frame type You may choose to accept both tagged and untagged incoming frames or just tagged incoming frames on a port. Ingress filtering If set, the Switch discards incoming frames for VLANs that do not have this port as a member 88 ES-2108 Series User's Guide