366CHAPTER 14: VIRTUAL LANS (VLANS)

bridge vlan vlanAwareMode

3500

9000

9400

3900

9300

For CoreBuilder 9000: Applies to Layer 3 switching modules only.

For compatibility purposes, allows the system to observe previous VLAN resource usage and tagged-frame ingress rules for CoreBuilder 3500 serial-port upgrades from Release 1.2.0 to 2.1.0 or 3.0.0 (or CoreBuilder 9000 upgrades from Release 2.0.0 to 3.0.0).

Valid Minimum Abbreviation

b v v

Important Considerations

Use this command only if you upgrade your system and the system reports an error after reaching the VLAN resource limit during a power up with a serial-port console connection. During the upgrade, the difference in resource usage and modes of tagging could cause the later release to use more VLAN resources than did the earlier release, thereby causing a decrease in the total number of allowable VLANs.

If the system reaches the VLAN resource limit during the upgrade, it displays an error message to identify the index of the VLAN that it was unable to create. The system removes all bridge ports from the VLAN that it could not restore from NV data but does maintain the previously stored NV data.

The difference in VLAN resource usage is based on the following:

In CoreBuilder 3500 Release 1.2.0 (and CoreBuilder 9000 Release 2.0.0), all bridge ports were not VLAN aware (tagging aware) unless they were assigned to a VLAN that has one or more tagged ports. This behavior is associated with the VLAN aware mode of taggedVlanPorts. If you see the VLAN resource error message, you can restore your VLANs by issuing this command and setting the VLAN aware mode to taggedVLANPorts. If VLANs are already defined, the system prompts you to reboot the system to put the new mode into effect.

As of CoreBuilder 3500 Release 2.0.0, (and CoreBuilder 9000 Release 3.0.0), all bridge ports become VLAN aware after a software update or after an NV data reset and do not have to be explicitly tagged in order to forward tagged frames. This behavior is associated with the default VLAN aware mode of allPorts. If you do not see the VLAN internal resource error message, maintain the VLAN aware mode of allPorts.

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3Com 3500 manual Bridge vlan vlanAwareMode