Introduction To Garp And Gvrp - 3Com 7757 Configuration Manual

3com switch 7750 family
Hide thumbs Also See for 7757:
Table of Contents

Advertisement

18
Introduction to GARP
and GVRP
Introduction to GARP
GVRP C
ONFIGURATION
GARP (generic attribute registration protocol) offers a mechanism that is used by
the members in the same switching network to distribute, propagate and register
such information as VLAN and multicast addresses.
GARP dose not exist in a switch as an entity. A GARP participant is called GARP
application. The main GARP applications at present are GVRP and GMRP. GVRP is
described in the "GVRP Mechanism" on page 154 and GMRP will be described in
Multicast Configuration. When a GARP participant is on a port of the switch, each
port corresponds to a GARP participant.
Through GARP mechanism, the configuration information on one GARP member
will be advertised rapidly in the whole switching network. GARP member can be a
terminal workstation or bridge. A GARP member can notify other members to
register or remove its attribute information by sending declarations or withdrawal
declarations. It can also register or remove the attribute information of other
GARP members according to the received declarations/withdrawal declarations.
GARP members exchange information through sending messages. There mainly
are 3 types of GARP messages including Join, Leave, and LeaveAll.
When a GARP participant wants to register its attribute information on other
switches, it will send Join message outward.
When it wants to remove some attribute values from other switches, it will
send Leave message.
LeaveAll timer will be started at the same time when each GARP participant is
enabled and LeaveAll message will be sent upon timeout.
Leave message and LeaveAll message cooperate to ensure the logout and the
re-registration of a message. Through exchanging messages, all the attribute
information to be registered can be propagated to all the switches in the same
switching network.
The destination MAC addresses of the packets of the GARP participants are
specific multicast MAC addresses. A GARP-supporting switch will classify the
packets received from the GARP participants and process them with
corresponding GARP applications (GVRP or GMRP).
GARP and GMRP are described in details in the IEEE 802.1p standard (which has
been added to the IEEE802.1D standard). 3Com Series Ethernet Switches fully
support the GARP compliant with the IEEE standards.

Advertisement

Table of Contents
loading

This manual is also suitable for:

775077587754

Table of Contents