Dell SmartFabric OS10 User Guide Release 10.5.3

Each physical Ethernet interface uses a unique MAC address. Port-channels and VLANs use a single MAC address. By default, all the interfaces operate in L2 mode. From L2 mode you can configure switching and L2 protocols, such as VLANs and Spanning-Tree Protocol (STP) on an interface.

Enable L2 switching on a port interface in Access or Trunk mode. By default, an interface is configured in Access mode. Access mode allows L2 switching of untagged traffic on a single VLAN (VLAN 1 is the default). Trunk mode enables L2 switching of untagged traffic on the Access VLAN, and tagged traffic on one or more VLANs.

By default, native VLAN of a port is the default VLAN ID of the switch. You can change the native VLAN using the switchport access vlan vlan-id command.

A Trunk interface carries VLAN traffic that is tagged using 802.1q encapsulation. If an Access interface receives a packet with an 802.1q tag in the header that is different from the Access VLAN ID, it drops the packet.

By default, a trunk interface carries only untagged traffic on the Access VLAN. You must manually configure other VLANs for tagged traffic.

1. Select one of the two available options:
   • Configure L2 trunking in INTERFACE mode and the tagged VLAN traffic that the port can transmit. By default, a trunk port is not added to any tagged VLAN. You must create a VLAN before you can assign the interface to it.

     switchport mode trunk
     switchport trunk allowed vlan vlan-id-list

   • Reconfigure the access VLAN assigned to a L2 access or trunk port in INTERFACE mode.

     switchport access vlan vlan-id 

2. Enable the interface for L2 traffic transmission in INTERFACE mode.

   no shutdown

OS10(config)# interface ethernet 1/1/7
OS10(conf-if-eth1/1/7)# switchport mode trunk
OS10(conf-if-eth1/1/7)# switchport trunk allowed vlan 5,10
OS10(conf-if-eth1/1/7)# no shutdown