Viewing and Changing the L2 Ports Information

1. From the top menu, click Controller.
2. In the left pane, click Network > L2 Ports. The L2 Ports tab is displayed.
   

   
3. The L2 Ports tab presents the Physical (that is, Ethernet) and LAG (Link Aggregation Group) (peer to peer) data ports that exist on the controller. These ports cannot be deleted and new ones cannot be created.

   LAG ports are statically configured by adding/removing physical ports from the LAG. Physical port belong to at most one LAG at one time. L2 port attached to a LAG port does not have any properties and could not be attached to any topology. The L2 ports attached to LAG ports can be enabled or disabled. Optional, if changes occur to the port physical parameters (speed, half or full duplex), a warning will be displayed to indicate that the L2 port does not meet LAG conditions.

   Considerations for attaching/detaching regular L2 ports to LAG ports:

   • Regular L2 port should not have any bridged and physical topologies associated with the port.
   • Regular L2 port should not be disabled.
   • L2 ports can be detached from LAG ports regardless of any topologies attached to the LAG port.
   • If the L2 port is the last remaining in LAG, a warning will be issued. If last port of the LAG has been detached, the LAG should be in operational DOWN state.
   • After detaching the L2 port, it could be attached to any bridged or physical topology or points via a routing table to the port any Routed topology.
   • Jumbo Frames support is a feature that allows the configuration of physical Maximum Transmission Unit (MTU) sizes larger than the standard 1500 bytes on the AP and controller. When Jumbo Frames is enabled, the maximum MTU is 1800 bytes.
4. Assigning any bridged or physical topology without specifying an L2 port is not supported. However, you can move any bridged and physical topology to either a physical or LAG L2 port.

   Physical:

   • C5110 — Three data ports, displayed as esa0, esa1, and esa2.
   • C5210 — Four data ports, displayed as esa0, esa1, esa2, and esa3.
   • C4110 — Four data ports, displayed as Port1, Port2, Port3, and Port4.
   • C25 — Two data ports, displayed as esa0 and esa1.
   • C35 — Four data ports, displayed as esa0, esa1, esa2, and esa3.
   • V2110 — Two data ports, displayed as esa0 and esa1.

   Link Aggregation:

   • C5110 — One data port, displayed as lag1
   • C5210 — Two data ports, displayed as lag1 and lag2.
   • C4110 — Two data ports, displayed as lag1 and lag2.
   • C35 — Two data ports, displayed as lag1 and lag2.
   • C25 — One data port, displayed as lag1.
5. An “Admin” port is created by default. This represents a physical port, separate from the other data ports, being used for management connectivity. For more information, see Configuring the Admin Port.

   Parameters displayed for the L2 Ports are:

   • Operational status, represented graphically with a green checkmark (UP) or red X (DOWN). This is the only configurable parameter.
   • Port name, as described above.
   • MAC address, as per Ethernet standard.
   • Untagged VLAN (Virtual LAN), displays the associated untagged VLAN ID. This ID is unique among topologies.
   • Tagged VLAN, displays the associated tagged VLAN ID.
   • Attached Physical L2 Ports (Link Aggregation L2 Ports only) select the physical L2 ports associated with the link aggregation L2 Ports.

   

   Note

   Refer to Viewing and Changing the Physical Topologies for more information about L2 port topologies.
6. If desired, change the operational status by clicking the Enable checkbox.
   You can change the operational state for each port. By default, data interface states are enabled. If they are not enabled, you can enable them individually. A disabled interface does not allow data to flow (receive/transmit).
7. If support of MTU sizes above 1500 bytes is required, click Enable Jumbo Frames support. This will extend the MTU size to 1800 bytes on the data link layer.
   Enabling Jumbo Frames support requires that port speed to be 1Gbps or higher on the controller and the APs which support Jumbo Frames. Jumbo Frames are not supported on 10 or 100 Mbps speeds.