show link

The show link command provides status about all interfaces on the appliance. The output includes the following data about each interface.

• The name of the interface.
• The link state of the interface. Values are ok or no link. If no link, one of the following conditions exists.
  • The interface is not responding to the network.
  • The Ethernet interface is configured for link aggregation but is not assigned to an aggregate interface.
• The actual fixed, configured, or negotiated Ethernet PHY mode, including speed and duplex. All network interfaces, other than Ethernet interfaces, report a value of none.
• The type of interface: Ethernet, VLAN, aggregate, or other. The other interface type refers to network interfaces that you cannot configure. Examples of other interface types include gre0, ip6tnl0, lo, sit0, and usb0. Not all appliances have all of these other interface types.
• The maximum transmission unit (MTU), or largest packet, size that can be sent or received on the interface.
• The associated aggregate interface, if any.
• The physical address for the interface. The default value for Ethernet interfaces is programmed in the Ethernet hardware.