Configuring Garp/Gvrp - 3Com 7700 Configuration Manual

Hide thumbs Also See for 7700:
Table of Contents

Advertisement

Configuring
GARP/GVRP
[SW7700-vlan2] port Ethernet 1/0/1 Ethernet 2/0/1
3 Create VLAN 3 and enters its view.
[SW7700-vlan2] vlan 3
4 Add Ethernet 1/0/2 and Ethernet 2/0/2 to VLAN3.
[SW7700-vlan3] port Ethernet 1/0/2 Ethernet 2/0/2
Generic Attribute Registration Protocol (GARP), offers a mechanism that is used by
the members in the same switching network to distribute, propagate, and register
information such as VLAN and multicast addresses.
GARP does not exist in a switch as an entity. A GARP participant is called a GARP
application. The main GARP applications are GVRP and GMRP. GVRP is described
in Configuring GARP/GVRP and GMRP is described in Multicast Configuration.
When a GARP participant is on a port of the switch, each port corresponds to a
GARP participant.
Through the GARP mechanism, the configuration information on one GARP
member is advertised rapidly in the whole switching network. A 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 or withdrawal
declarations.
GARP members exchange information by sending messages. There are three main
types of GARP messages, including join, leave, and leaveall. When a GARP
participant wants to register its attribute information on other switches, it sends a
join message outward. When it wants to remove attribute values from other
switches, it sends a leave message. The leaveall timer is started at the same time
that each GARP participant is enabled and a leaveall message is sent at timeout.
The join and leave messages cooperate to ensure the logout and the
re-registration of a message. By 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 classifies the packets
received from the GARP participants and processes them with the 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 IEEE 802.1D standard). The Switch 7700 fully supports the
GARP compliant with the IEEE standards.
Note:
The value of the GARP timer is used in all the GARP applications, including
GVRP and GMRP, running in one switching network.
In one switching network, the GARP timers on all the switching devices should
be set to the same value. Otherwise, the GARP application cannot work
normally.

Configuring GARP/GVRP

41

Advertisement

Table of Contents
loading

Table of Contents