Alcatel 9000 Guide de l'utilisateur Page 156

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Dynamically Assigning Ports to VLANs Assigning Ports to VLANs
page 7-6 OmniSwitch 6800/6850/9000 Network Configuration Guide June 2006
In the initial VLAN port assignment configuration shown below,
All three ports have workstations that are configured to send packets with an 802.1Q VLAN ID tag for
three different VLANs (VLAN 2, 3, and 4).
Mobility is enabled on each of the workstation ports.
VLAN 1 is the configured default VLAN for each port.
VLANs 2, 3, and 4 are configured on the switch, each one has VLAN mobile tagging enabled.
VLAN Mobile Tag Classification: Initial Configuration
As soon as the workstations start sending traffic, switch software checks the 802.1Q VLAN ID tag of the
frames and looks for a VLAN that has the same ID and also has mobile tagging enabled. Since the work-
stations are sending tagged packets destined for the mobile tag enabled VLANs, each port is assigned to
the appropriate VLAN without user intervention. As the diagram on page 7-7 shows,
Port 1 is assigned to VLAN 2, because the workstation is transmitting tagged packets destined for
VLAN 2.
Port 2 is assigned to VLAN 3 because the workstation is transmitting tagged packets destined for
VLAN 3.
Port 3 is assigned to VLAN 4 because the workstation is transmitting tagged packets destined for
VLAN 4.
All three ports, however, retain their default VLAN 1 assignment, but now have an additional VLAN
port assignment that carries the matching traffic on the appropriate rule VLAN.
Port 2
VLAN 2
VLAN 1
VLAN 4
Mobile Tag Enabled
Default VLAN
Mobile Tag Enabled
Port 1
VLAN ID Tag = 2
VLAN 3
Mobile Tag Enabled
Port 3
OmniSwitch
VLAN ID Tag = 3 VLAN ID Tag = 4
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