One-Way Registration
Figure 5-5 One-way registration of a VLAN attribute
RouterA
RouterB
RouterC
Port 2
Port 1
Port 3
Port 4
Static vlan 2
JoinEmpty
JoinEmpty
Static VLAN 2 is created on RouterA. Ports on RouterB and RouterC can join VLAN 2
automatically through one-way registration. The process is as follows:
1. After VLAN 2 is created on RouterA, Port 1 of RouterA starts the Join timer and Hold
timer. When the Hold timer expires, Port 1 sends the first JoinEmpty message to RouterB.
When the Join timer expires, Port 1 restarts the Hold timer. When the Hold timer expires
again, Port 1 sends the second JoinEmpty message.
2. After Port 2 of RouterB receives the first JoinEmpty message, RouterB creates dynamic
VLAN 2 and adds Port 2 to VLAN 2. In addition, RouterB requests Port 3 to start the Join
timer and Hold timer. When the Hold timer expires, Port 3 sends the first JoinEmpty
message to RouterC. When the Join timer expires, Port 3 restarts the Hold timer. When the
Hold timer expires again, Port 3 sends the second JoinEmpty message. After Port 2 receives
the second JoinEmpty message, RouterB does not take any action because Port 2 has been
added to VLAN 2.
3. After Port 4 of RouterC receives the first JoinEmpty message, RouterC creates dynamic
VLAN 2 and adds Port 4 to VLAN 2. After Port 4 receives the second JoinEmpty message,
RouterC does not take any action because Port 4 has been added to VLAN 2.
4. Every time the LeaveAll timer expires or a LeaveAll message is received, each router
restarts the LeaveAll timer, Join timer, Hold timer, and Leave timer. Then Port 1 repeats
step 1 to send JoinEmpty messages. Port 3 of RouterB sends JoinEmpty messages to
RouterC in the same way.
Huawei AR530&AR550 Series Industrial Switch Routers
Configuration Guide - Ethernet Switching
5 GVRP Configuration
Issue 01 (2014-11-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
149
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