User`s guide

Example 2

DIGITAL MultiSwitch 700 Port Based VLAN User’s Guide 4-9

Figure 4-5 Transmitting to Switch 4

3. When Switch 2 receives the tagged frame on its port 2, it checks the

frame’s VLAN Tag Header and determines that the frame is classified

as belonging to the Red VLAN, and that the frame is a broadcast

frame. Switch 2 forwards the frame to all ports in the Red VLAN

Forwarding List excluding port 2, which received the frame. In this

example, the only eligible port is port 3, which connects to Bridge 4.

Switch 2 checks its Forwarding List, which specifies that the VLAN

frame type for that port is untagged. Switch 2 then updates its Source

Address Table for MAC address “Y” and VLAN Red if necessary. The

untagged frame is then transmitted out port 3 to Bridge 4. Bridge 4

forwards the frame out all its ports because it is a broadcast frame, and

the server receives it as shown in Figure 4-6.

Floor 2

2263n15

Floor 3

Floor 4

Bridge 1 Bridge 2

Bridge 3

Bridge 4

Redco

Blue Industries

Red VLAN

Blue VLAN

User A

File Server