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| Sun Ethernet Fabric Operating System ### VLAN Administration Guide

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### Configuration Guidelines

The following guidelines apply to working with VLANs as part of SEFOS:

- VLAN is enabled in the switch by default, and it cannot be disabled.

- VLAN 1 is the default VLAN.

- The default L3 interface is VLAN 1.

- Until you configure the ports, all of the ports in the switch are members of the default VLAN.

- If you disable the GVRP state on a port with the global GVRP status enabled, then GVRP is disabled on the current port. GVRP packets received on that port are discarded, and GVRP registrations from other ports are not propagated on the port.

- Mapping of FIDs to VLANs is successful only when the VLAN learning mode is `hybrid`.

- You must configure a VLAN and add member ports before you can configure a static unicast or multicast MAC address in the forwarding database.

- If a port is an untagged member of a VLAN, you cannot configure that port as `trunk`.

- To enable dot1q-tunneling status, the bridge mode must be set to `provider`.

- If the port mode is not set to `access`, you cannot set the dot1q-tunnel status on the port.

- To enable dot1q-tunneling on a port (802.1X, PNAC), port control must be set to `force-authorized`.

- If dot1q-tunneling status is disabled, you cannot set BPDU tunneling on the port.

- The leave timer must be two times greater than the join timer. The leave-all timer must be greater than the leave timer.

- You must ensure that the values for the acceptable frame type and ingress filtering on the port are suitable.

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