To configure, view, or delete a Loopback interface, use the following commands.• Enter a number as the Loopback interface.CONFIGURATION modeinterface loopback numberThe range is from 0 to 16383.• View Loopback interface configurations.EXEC modeshow interface loopback number• Delete a Loopback interface.CONFIGURATION modeno interface loopback numberMany of the same commands found in the physical interface are also found in the Loopback interfaces.Null InterfacesThe Null interface is another virtual interface. There is only one Null interface. It is always up, but notraffic is transmitted through this interface.To enter INTERFACE mode of the Null interface, use the following command.• Enter INTERFACE mode of the Null interface.CONFIGURATION modeinterface null 0The only configurable command in INTERFACE mode of the Null interface is the ip unreachablecommand.Port Channel InterfacesPort channel interfaces support link aggregation, as described in IEEE Standard 802.3ad.This section covers the following topics:• Port Channel Definition and Standards• Port Channel Benefits• Port Channel Implementation• Configuration Tasks for Port Channel InterfacesPort Channel Definition and StandardsLink aggregation is defined by IEEE 802.3ad as a method of grouping multiple physical interfaces into asingle logical interface—a link aggregation group (LAG) or port channel.A LAG is “a group of links that appear to a MAC client as if they were a single link” according to IEEE802.3ad. In Dell Networking OS, a LAG is referred to as a port channel interface.326 Interfaces
