Alcatel-Lucent 6850-48 Guida Di Rete

Pagina di 1162
Assigning Ports to VLANs
Dynamically Assigning Ports to VLANs
OmniSwitch AOS Release 6 Network Configuration Guide
September 2009
page 6-11
Enabling/Disabling Port Mobility
To enable mobility on a port, use the 
 command. For example, the following command 
enables mobility on port 1 of slot 4:
-> vlan port mobile 4/1
To enable mobility on multiple ports, specify a range of ports and/or multiple slots.
-> vlan port mobile 4/1-5 5/12-20 6/10-15
Use the no form of this command to disable port mobility.
-> vlan no port mobile 5/21-24 6/1-4
Only Ethernet and gigabit Ethernet ports are eligible to become mobile ports. If any of the following 
conditions are true, however, these ports are considered non-mobile ports and are not available for 
dynamic VLAN assignment:
• The mobile status for the port is disabled (the default).
• The port is an 802.1Q tagged port.
• The port belongs to a link aggregate of ports.
• Spanning Tree is active on the port and the BPDU ignore status is disabled for the port. (See 
 for more information.)
• The port is configured to mirror other ports.
Note. Mobile ports are automatically trusted ports regardless of the QoS settings. Se
 for more information.
Use th
 command to display a list of ports that are mobile or are eligible to 
become mobile. For more information about this command, see the OmniSwitch CLI Reference Guide.
Ignoring Bridge Protocol Data Units (BPDU)
By default, ports that send or receive Spanning Tree Bridge Protocol Data Units (BPDU) are not eligible 
for dynamic VLAN assignment. If the switch sees BPDU on a port, it does not attempt to classify the 
port’s traffic. The 
 command, however, provides an optional BPDU ignore parameter. If 
this parameter is enabled when mobility is enabled on the port, the switch does not look for BPDU to 
determine if the port is eligible for dynamic assignment. 
When BPDU ignore is disabled and the mobile port receives a BPDU, mobility is shut off on the port and 
the following occurs:
• The Switch Logging feature is notified of the port’s change in mobile status (see 
 for more information). 
• The port becomes a fixed (non-mobile) port that is associated only with its configured default VLAN.
• The port is included in the Spanning Tree algorithm.
• Mobility remains off on the port even if the port’s link is disabled or disconnected. Rebooting the 
switch, however, will restore the port’s original mobile status.