Alcatel OmniSwitch 6624 Network Configuration Manual page 118

Dynamically Assigning Ports to VLANs
When BPDU ignore is enabled and the mobile port receives a BPDU, the following occurs:
The port retains its mobile status and remains eligible for dynamic VLAN assignment.
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The port is not included in the Spanning Tree algorithm.
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Note. Enabling BPDU ignore is not recommended. In specific cases where it is required, such as connect-
ing legacy networks to mobile port networks, make sure that ignoring BPDU on a mobile port will not
cause network loops to go undetected. Connectivity problems could also result if a mobile BPDU port
dynamically moves out of its configured default VLAN where it provides traffic flow to/from the network.
The following command enables mobility and BPDU ignore on port 8 of slot 3:
-> vlan port mobile 3/8 BPDU ignore enable
Enabling mobility on an active port that sends or receives BPDU (e.g. ports that connect two switches and
Spanning Tree is enabled on both the ports and their assigned VLANs) is not allowed. If mobility is
required on this type of port, enable mobility and the BPDU ignore parameter when the port is not active.
page 6-12 OmniSwitch 6624/6648 Network Configuration Guide
Assigning Ports to VLANs
April 2004