Range Mode

Configure multiple interfaces simultaneously using the interface range command to save time and ensure consistent settings.

Step 1: Enter interface range mode Select a continuous range of interfaces to configure together.

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SW1>enable
SW1#configure terminal
SW1(config)#interface range gigabitEthernet 0/1-24
SW1(config-if-range)#

Step 2: Configure basic access port settings Apply common access port configurations to all interfaces in the range.

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SW1(config-if-range)#switchport mode access
SW1(config-if-range)#switchport access vlan 10
SW1(config-if-range)#switchport port-security
SW1(config-if-range)#switchport port-security maximum 2
SW1(config-if-range)#switchport port-security violation restrict
SW1(config-if-range)#spanning-tree portfast
SW1(config-if-range)#spanning-tree bpduguard enable

Step 3: Configure non-continuous ranges Use comma-separated values to configure specific interfaces that aren’t in sequence.

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SW1(config)#interface range gi0/1-5, gi0/10-15, gi0/20
SW1(config-if-range)#description User Access Ports
SW1(config-if-range)#switchport access vlan 20
SW1(config-if-range)#no shutdown
SW1(config-if-range)#exit

Step 4: Configure trunk ports range Set up multiple uplink interfaces as trunk ports.

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SW1(config)#interface range gi0/47-48
SW1(config-if-range)#description Uplink Trunks
SW1(config-if-range)#switchport mode trunk
SW1(config-if-range)#switchport trunk allowed vlan 10,20,30,40
SW1(config-if-range)#switchport trunk native vlan 99
SW1(config-if-range)#no shutdown
SW1(config-if-range)#end

Step 5: Verify the configuration

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SW1#show running-config | section interface GigabitEthernet0/1
SW1#show interfaces status
SW1#show vlan brief

Key Points:

  • Range mode applies commands to ALL interfaces in the specified range
  • Use interface range for FastEthernet (fa), GigabitEthernet (gi), or TenGigabitEthernet (te)
  • Commands entered in range mode cannot be undone individually - affects entire range
  • Always verify configuration before applying to production interfaces