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GVRP
The Generic Attribute Registration Protocol (GARP) provides a generic framework whereby devices in a bridged LAN, e.g. end
stations and switches, can register and de-register attribute values, such as VLAN Identifiers, with each other. In doing so,
the 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
de-registration of attribute values
.
GARP participation in a switch or an end station consists of a GARP application component, and a GARP Information
Declaration (GID) component associated with each port of the switch. The propagation of information between GARP
participants for the same application in a bridge is carried out by the GARP Information Propagation (GIP) component.
Protocol exchanges take place between GARP participants by means of LLC Type 1 services, using the group MAC address
and PDU format defined for the GARP application concerned.
GVRP Global Configuration
The switch stores its configuration in a number of text files in CLI format. The files are either virtual (RAM-based) or stored in
flash on the switch. There are three system files:
Running-config: A virtual file that represents the currently active configuration on the switch. This file is volatile.
Startup-config: the startup configuration for the switch to read at boot time.
Default-config: A read-only file with vendor-specific configuration. This file is read when the system is restored to
default settings.
It is also possible to store up to two other files and apply them to running-config, thereby switching configuration.
To configure the GVRP in the web interface:
Click Configuration / GVRP / Global Config
Specify Join-time, Leave-time, Leave-All-time, Max VLANs
Click Apply and click the Save icon in the upper right corner to save the settings.
GVRP Configuration Parameters:
Items
Description
Enable GVRP Globally
The GVRP feature is enabled by setting the check mark in the checkbox named Enable GVRP.
GVRP protocol timers
Join-time is a value in the range 1-20 in the units of centiseconds, i.e. in units of one
hundredth of a second. The default is 20.
Leave-time is a value in the range 60-300 in the units of centiseconds, i.e. in units of one
hundredth of a second. The default is 60.
Leave All-time is a value in the range 1000-5000 in the units of centi seconds, i.e. in units of
one hundredth of a second. The default is 1000.
Max number of VLANs
When GVRP is enabled a maximum number of VLANs supported by GVRP is specified. By
default this number is 20. This number can only be changed when GVRP is turned off.