Dell PowerConnect 5548 User Guide - Page 425
GARP Overview, Generic Attribute Registration Protocol GARP is a general-purpose protocol
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GARP Overview Generic Attribute Registration Protocol (GARP) is a general-purpose protocol that registers network connectivity or membership-style information. GARP defines a set of devices interested in a given network attribute, such as VLAN or Multicast address. The Generic Attribute Registration Protocol (GARP) provides a generic framework whereby devices in a bridged LAN, such as end stations and switches, can register and de-register attribute values, such as VLAN Identifiers, with each other. In doing so, these attributes are propagated to devices in the bridged LAN, and these devices form a reachability tree that is a subset of an active topology. GARP defines the architecture, rules of operation, state machines and variables for the registration and deregistration of attribute values. When configuring GARP, ensure the following: • The leave time must be greater than or equal to three times the join time. • The leave-all time must be greater than the leave time. • Set the same GARP timer values on all Layer 2-connected devices. If the GARP timers are set differently on the Layer 2-connected devices, GARP application does not operate successfully. Dell PowerConnect 55xx Systems User Guide 425