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Release
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Modification
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12.0(7)XE
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The interface range command was introduced.
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12.1(5)T
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The interface range command was integrated into Cisco IOS Release 12.1(5)T.
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12.2(2)DD
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The interface range command was expanded to enable configuration of subinterfaces.
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C
onfiguring a Range of VLAN Subinterfaces
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Command
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Purpose
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Step 1
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Router(config)# interface range {{ethernet | fastethernet | gigabitethernet | atm} slot/interface.subinterface – {{ethernet | fastethernet | gigabitethernet | atm}slot/interface.subinterface}
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Selects the range of subinterfaces to be configured.
Note  The space before the dash is required. For example, the command interface range fastethernet 1 – 5 is valid; the command interface range fastethernet 1-5 is not valid.
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Step 2
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Router(config-int-range)# encapsulation dot1Q vlan-id
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Applies a unique VLAN ID to each subinterface within the range.
vlan-id—Virtual LAN identifier. The allowed range is from 1 to 4095.
The VLAN ID specified by the vlan-id argument is applied to the first subinterface in the range. Each subsequent interface is assigned a VLAN ID which is the specified vlan-id plus the subinterface number minus the first subinterface number (VLAN ID + subinterface number – first subinterface number).
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Single Range Configuration Example
The following example configures the Fast Ethernet subinterfaces within the range 5/1.1 and 5/1.4 and applies the following VLAN IDs to those subinterfaces:
Fast Ethernet5/1.1 = VLAN ID 301 (vlan-id)
Fast Ethernet5/1.2 = VLAN ID 302 (vlan-id=301 + 2 – 1=302)
Fast Ethernet5/1.3 = VLAN ID 303 (vlan-id=301 + 3 – 1=303)
Fast Ethernet5/1.4 = VLAN ID 304 (vlan-id=301 + 4 – 1=304)
Router(config)# interface range fastethernet5/1.1 - fastethernet5/1.4
Router(config-if)# encapsulation dot1Q 301
Router(config-if)# no shutdown