Huawei Quidway S5600 Series Operation Manual page 972

Operation Manual – VLAN VPN
Quidway S5600 Series Ethernet Switches-Release 1510
Note:
The following describes how a packet is forwarded from Switch A to Switch C.
As the GigabitEthernet1/0/1 port of Switch A is a VLAN-VPN port, when a packet
from the user's private network side reaches GigabitEthernet1/0/1 port of Switch A,
it is tagged with the default VLAN tag of the port (VLAN 10) and is then forwarded to
GigabitEthernet1/0/2 port.
The packet reaches GigabitEthernet3/1/2 port of Switch B in the public network.
Switch B forwards the packet in VLAN 10 to GigabitEthernet3/1/1.
The packet is forwarded from GigabitEthernet3/1/1 port of Switch B to the network
on the other side and enters GigabitEthernet1/0/2 port of Switch C. Then Switch C
forwards the packet in VLAN 10 to its GigabitEthernet1/0/1. As GigabitEthernet1/0/1
port is an access port, Switch C strips off the outer VLAN tag of the packet and
restores the original packet.
It is the same case when a packet travels from Switch C to Switch A.
After the configuration, the networks connecting Switch A and Switch C can receive
data packets from each other.
Huawei Technologies Proprietary
1-6
Chapter 1 VLAN-VPN Configuration