Configuration Guide Configuring Interfaces
The types of interfaces of all ranges specified in one command must be the same.
Pay attention to the format of the range parameter when you run the interface range command.
The following common interface range formats are valid:
FastEthernet device/slot/{first interface} - {last interface}
GigabitEthernet device/slot/{first interface} - {last interface}
Loopback loopback-ID - loopback-ID, ranging from 1 to the maximum number of loopback interfaces supported by the
device
Tunnel tunnel-ID - tunnel-ID, ranging from 1 to the maximum number of tunnel interfaces supported by the device
Interfaces within one interface range must be of the same type. That is, all of them are FastEthernet, GigabitEthernet , or
loopback interfaces.
Configuring the Interface Macro
You can define some macros to avoid manually entering interface ranges. Before using the macro keyword in the interface
range command, you need to run the define interface-range command to define these macros in global configuration
mode.
Run the no define interface-range macro_name command in global configuration mode to delete the configured macros.
Related Configuration
Configuring an Interface
You can run the interface command to enter the interface configuration mode.
Configuring Interfaces Within a Specific Range
You can run the interface range command in global configuration mode to configure multiple interfaces at the same time.
These interfaces must be of the same type, such as FastEthernet or GigabitEthernet.
Configuring the Interface Macro
To avoid manually entering interface ranges, you can define some macros that are easy to remember and distinguish. Before
using the macro keyword in the interface range command, you need to run the define interface-range command to define
these macros in global configuration mode. No macro is configured by default.
Configuring a Loopback Interface
No loopback interface is created by default.
You can run the interface loopback loopback-interface-number command in global configuration mode to create a loopback
interface. The value of loopback-interface-number ranges from 1 to the maximum number of loopback interfaces supported
by a device. After a loopback interface is successfully created, enter the interface configuration mode of this loopback
interface. You can run the no interface loopback loopback-interface-number command to delete a specified loopback
interface.
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