User`s guide

Example 1
DIGITAL MultiSwitch 700 Port Based VLAN User’s Guide 4-3
4. Now that the ports have been assigned, the VLANs are enabled from
the Device/VLAN Configuration screen. The switch automatically
updates the Forwarding Lists for the Red and Blue VLANs and
updates the Egress Lists for all the ports on the switch.
Figure 4-2 Switch Configured for VLANs
The switch will now classify each frame received as belonging to either
the Red or Blue VLANs. Traffic from one VLAN will not be forwarded to
the members of the other VLAN, and all frames transmitted by the switch
will be normal, untagged Ethernet frames.
4.1.2 Frame Handling
This section describes the operations of the switch when two frames are
received. The first frame is a broadcast sent by station R1.
1. Station R1 transmits the broadcast frame. The switch receives this
frame on Interface 1. As the frame is received, the switch classifies it.
The frame is untagged, so the switch classifies it as belonging to the
VLAN that Interface 1 is assigned to, the Red VLAN.
2. At the same time, the switch adds the source MAC address of the
frame and VLAN it was learned from to its Source Address Table. In
this fashion it learns that station R1 is located out Interface 1.
3 6
2
4
5
B2
B1
B3R1
R2
R2
802.1Q Switch
VLAN ID 002
VLAN ID 003VLAN ID 002
VLAN ID 003VLAN ID 002
VLAN ID 003
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