Huawei AR530 series Configuration Manual page 159

Huawei AR530&AR550 Series Industrial Switch Routers
Configuration Guide - Ethernet Switching
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A port registers or deregisters VLANs only when it receives GVRP messages.
Figure 5-3 VLAN registration and deregistration
GARP Messages
GARP participants exchange VLAN information through GARP messages. Major GARP
messages are Join messages, Leave messages, and LeaveAll messages.
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Issue 01 (2014-11-30)
When a port receives a VLAN attribute reclaim declaration, it deregisters the VLAN
specified in the declaration. That is, the port is removed from the VLAN.
Declaration
Reclaim
declaration
RouterA
Join message
When a GARP participant expects other devices to register its attributes, it sends Join
messages to other devices. When the GARP participant receives a Join message from
another participant or is configured with attributes statically, it also sends Join messages
to other devices for the devices to register the new attributes.
Join messages are classified into JoinEmpty messages and JoinIn messages. The difference
between the two types of messages is:
– JoinEmpty: declares an unregistered attribute.
– JoinIn: declares a registered attribute.
Leave message
When a GARP participant expects other devices to deregister its attributes, it sends Leave
messages to other devices. When the GARP participant receives a Leave message from
another participant or some of its attributes are deregistered statically, it also sends Leave
messages to other devices.
Leave messages are classified into LeaveEmpty messages and LeaveIn messages. The
difference between the two types of messages is:
– LeaveEmpty: deregisters an unregistered attribute.
– LeaveIn: deregisters a registered attribute.
LeaveAll message
When a participant starts, it starts the LeaveAll timer. When the LeaveAll timer expires,
the participant sends LeaveAll messages to other devices.
A participant sends LeaveAll messages to deregister all attributes so that other participants
can re-register attributes of the local participant. LeaveAll messages are used to periodically
delete useless attributes on the network. For example, an attribute of a participant is deleted
but the participant does not send Leave messages to request other participants to deregister
the attribute because of a sudden power failure. Then this attribute becomes useless.
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Register
Deregister
RouterB
5 GVRP Configuration
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