Hirschmann GREYHOUND GRS1020, Reference Manual

Page: 567 / 619

Advanced functions of the device
14.3 GARP
227
UM Config GRS
Release 8.0 09/2019
14.3 GARP
The Generic Attribute Registration Protocol ( GARP ) is defined by the IEEE to provide a generic
framework so switches can register and deregister attribute values, such as VLAN identifiers and
Multicast group membership.
If an attribute for a participant is registered or deregistered according to the GARP function, then the
participant is modified according to specific rules. The participants are a set of reachable end
stations and network devices. The defined set of participants at any given time, along with their
attributes, is the reachability tree for the subset of the network topology. The device forwards the
data frames only to the registered end stations. The station registration helps prevent attempts to
send data to the end stations that are unreachable.
14.3.1 Configuring GMRP
The GARP Multicast Registration Protocol ( GMRP ) is a Generic Attribute Registration Protocol
( GARP ) that provides a mechanism allowing network devices and end stations to dynamically
register group membership. The devices register group membership information with the devices
attached to the same LAN segment. The GARP function also lets the devices disseminate the
information across the network devices that support extended filtering services.
Note: Before you enable the GMRP function, verify that the MMRP function is disabled.
The following example describes the configuration of the GMRP function. The device provides a
constrained multicast flooding facility on a selected port.
Perform the following steps:

Open the
Switching > GARP > GMRP
dialog.

To provide constrained Multicast Flooding on a port, mark the checkbox in the
GMRP active
column.

To save the changes temporarily, click the button.
enable
Change to the Privileged EXEC mode.
configure
Change to the Configuration mode.
interface 1/1
Change to the interface configuration mode of
interface
1/1
.
garp gmrp operation
Enabling the GMRP function on the port.
exit
Change to the Configuration mode.
garp gmrp operation
Enabling the GMRP function globally.