How to better understand VLAN? You can think of VLAN as a "virtual room". Even if they are physically in the same building (switch), different functions and isolation can be achieved by dividing the room (VLAN). Ultimately, security and flexibility are improved. Example of VLAN configuration across switches:
The switch 1 on the left is interconnected with the switch 2 on the right, and the cascade ports are shown in the figure:
Switch 1 configuration:
Open Tree bar on the left, select Switching--VLAN--Static
T: Intermediate Trunk port in switch 1
Select T for Port 1.5 corresponding to VLAN2 and VLAN3, which means that VLAN2 and VLAN3 can flow out from Port 1.5, and click Set to save.
U: Access interface
Select T for Port 1.5 corresponding to VLAN2 and VLAN3, which means that VLAN2 and VLAN3 can flow out from Port 1.5, and click Set to save.
The interface performs actions on VLANTag in both the inbound and outbound directions of traffic.
Port 1.1 /1.4: Enter the value 2 to allow VLAN 2 to flow in
Port 1.2/1.3: Enter the value 3 to allow VLAN 3 to flow in
Port 1.5: The default value is 1
Click Set to save.
Open Tree bar on the left, select Basic Setting--Load/Save
Save: Select to Device, click the Save button to save to NV-RAM
Switch 2 configuration:
Open Tree bar on the left, select Switching--VLAN--Static
Trunk port of switch 2
VLAN2 and VLAN3 correspond to Port1.1 and select T, which means that VLAN2 and VLAN3 are allowed to flow out from Port1.1.
Click Set to save.
Open Tree bar on the left, select Switching--VLAN--Port
Port 1.1: The default value is 1
Port 1.2/1.4: Enter the value 2 to allow VLAN 2 to flow in
Port 1.3/1.5: Enter the value 3 to allow VLAN3 to flow in
Click Set to save.
Open Tree bar on the left, select Switching--VLAN--Static
Port 1.3/1.4/1.5: Access port
Port 1.2/1.3/1.4:
VLAN2 and VLAN3 correspond to Port1.1 and select T, which means that VLAN2 and VLAN3 are allowed to flow out from Port1.1.
Click Set to save.
Open Tree bar on the left, select Basic Setting--Load/Save
Save: Select to Device, click the Save button to save to NV-RAM
Save Configuration