User`s guide

Chapter 5: Examples

5-10 Port Based VLAN User’s Guide

Figure 5-6 Transmitting to Bridge 4

4. The the File Server responds with a unicast frame to User A. All

switches between the File Server and User A have an entry in their

respective Source Address Tables identifying which port to use for

forwarding the frame to User A, MAC address “Y”, VLAN Red. All

switches update their Source Address Tables for the File Server’s

MAC address “Z”, VLAN Red combination as the frame is forwarded

through the switch fabric to User A. The 802.1d switches update their

Source Address Tables based on the source MAC address and receive

port and the 802.Q switches update their databases based on the source

MAC address, VLAN, and receive port.

5. The frame from the File Server is received on Switch 2, and forwarded

to Switch 1 as a tagged frame classified as belonging to the Red

VLAN. Switch 1 removes the tag and forwards the frame to Bridge 1,

which in turn forwards the frame out of the port attached to User A.

All subsequent frames between User A and the File Server are

forwarded through the switch fabric in the same manner.

Floor 2

2263_16

Floor 3

Bridge 3

Bridge 4

Redco

Blue Industries

Red VLANBlue VLAN

File Server