Dell PowerSwitch S4820T 9.50.1 Configuration Guide for the S4820T System - Page 418
Loopback Interfaces, Null Interfaces, Port Channel Interfaces, Port Channel Definition and Standards
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Loopback Interfaces A Loopback interface is a virtual interface in which the software emulates an interface. Packets routed to it are processed locally. Because this interface is not a physical interface, you can configure routing protocols on this interface to provide protocol stability. You can place Loopback interfaces in default Layer 3 mode. To configure, view, or delete a Loopback interface, use the following commands. • Enter a number as the Loopback interface. CONFIGURATION mode interface loopback number The range is from 0 to 16383. • View Loopback interface configurations. EXEC mode show interface loopback number • Delete a Loopback interface. CONFIGURATION mode no interface loopback number Many of the same commands found in the physical interface are also found in the Loopback interfaces. Null Interfaces The Null interface is another virtual interface. There is only one Null interface. It is always up, but no traffic 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 mode interface null 0 The only configurable command in INTERFACE mode of the Null interface is the ip unreachable command. Port Channel Interfaces Port 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 Interfaces 418 Interfaces
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