Interlogix NS3550-8T-2S User Manual - Manual (Page 111)

User’s Manual of NS3550-8T-2S
111
4.6.10 VLAN setting example:
- Separate VLAN
- 802.1Q VLAN Trunk
- Port Isolate
4.6.10.1 Two separate 802.1Q VLAN
The diagram shows how the Industrial Managed Switch handle Tagged and Untagged traffic flow for two VLANs. VLAN Group 2
and VLAN Group 3 are separated VLAN. Each VLAN isolates network traffic so only members of the VLAN receive traffic from
the same VLAN members. The screen in
Figure 4-6-8 appears and Table 4-1 describes the port configuration of the Industrial
Managed Switch .
Figure 4-6-8: Two Separate VLAN Diagram
VLAN Group VID Untagged Members Tagged Members
VLAN Group 1 1 Port-7 ~ Port-10 N/A
VLAN Group 2 2 Port-1,Port-2 Port-3
VLAN Group 3 3 Port-4,Port-5 Port-6
Table 4-1: VLAN and Port Configuration
The scenario described as follow:
 Untagged packet entering VLAN 2
1. While [PC-1] transmitting an untagged packet enters Port-1, the Managed Switch will tag it with a VLAN Tag=2.
[PC-2]
and [PC-3] will receive the packet through Port-2 and Port-3.
2. [PC-4],[PC-5] and [PC-6] receive no packet.
3. While the packet leaves Port-2, it will be stripped away its tag becoming an untagged packet.
4. While the packet leaves Port-3, it will keep as a tagged packet with VLAN Tag=2.

Tagged packet entering VLAN 2
5. While [PC-3] transmit a tagged packet with VLAN Tag=2 enters Port-3, [PC-1] and [PC-2] will receive the packet
through Port-1 and Port-2.
6. While the packet leaves Port-1 and Port-2, it will be stripped away its tag becoming an untagged packet.
 Untagged packet entering VLAN 3
1. While [PC-4] transmit an untagged packet enters Port-4, the switch will tag it with a VLAN Tag=3. [PC-5] and
[PC-6] will receive the packet through Port-5 and Port-6.
2. While the packet leaves Port-5, it will be stripped away it tag becoming an untagged packet.
3. While the packet leaves Port-6, it will keep as a tagged packet with VLAN Tag=3.