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Switch 2
Switch 2 is set as follows:
1. On the Port Filtering Configuration screen, the Filter Using Port
VLAN Lists is set to YES for ALL ports.
2. Two VLANs are added to the list of VLANs in the Device/VLAN
Configuration screen and assigned to a FID. In this example they are
as follows:
•
VLAN ID 222, FID 3, with a VLAN Name of Red
•
VLAN ID 223, FID 3, with a VLAN Name of Blue
3. A Port VLAN ID is assigned to each port (1, 2, and 3) as follows using
the Port Assignment screen:
•
Port 1, VLAN ID: 223 for the Blue VLAN
•
Port 2, Port Mode: 1Q Trunk
•
Port 3, VLAN ID: 222 for the Red VLAN
These settings change the configuration of the switch, so that Port 1 is
part of Blue VLAN, Port 3 is part of Red VLAN, and both are set as
frame type of untagged. Port 2 is set as an 802.1Q Trunk port, which
makes the Port VLAN List contain all VLANs and sets all frames
forwarded out this port to be tagged frames.
4.2.2
Frame Handling
The following describes how, when User A attempts to log on to the File
Server on Bridge 4, the frames from User A are classified on Switch 4 and
traverse the network. In this example, the MAC address of User A is "Y"
and the MAC address for the File Server is "Z". The following description
includes illustrations to help understand how the frames flow through the
network.
1. User A sends a frame with a Broadcast Destination Address in an
attempt to locate the File Server. The frame is received on User A's
port of Bridge 1 and, because the frame is a broadcast frame, it is
transmitted out all ports of Bridge 1 as shown in Figure 4-4.
802.1Q VLAN User's Guide
Example 2
4-7
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