Mine Site Technologies NS50, User Manual, Page: 47 / 126

Figure 15: VLAN traffic flow
1. A PC sends an untagged frame into access port 6 (Control VLAN) on wireless network switch 1. The
frame is sent to other access ports on the Control VLAN (access port 5).
2. Wireless network switch 1 tags the frame with VLAN ID = 4 and Priority = 5 and sends it through the
trunk ports to Wireless network switch 2.
3. Wireless network switch 2 receives the tagged frame, and identifies the frame belonging to the Control
VLAN.
4. Wireless network switch 2 removes the tag and sends the frame to all ports on the Control VLAN
(access ports 5 and 7).
5. If Wireless network switch 1 receives multiple frames, they are tagged and sent via trunk ports to
Wireless network switch 2.
6. Wireless network switch 2 receives the frames and prioritises distribution.
4.1.3 Port Allocation
Physical ports on the NS50 can be configured to be either a trunk port or access port using the web browser
interface or editing site configuration files when Trivial File Transfer Protocol (TFTP) is used. The NS50
default configuration has ports 1-8 allocated as trunk ports . Ports 1-4 are usually connected to other NS50
units, and ports 5-8 are connected to WAPs or other PoE devices. For more information on configuring
ports and VLAN membership, see
Configuring the VLAN Port Map on page 67.
NS50 User Manual 47 Revision A
Understanding VLANs