How To Configure Subinterface On Cisco Router?
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1. Log in to your router and enter the ‘enable’ mode by typing the command ‘enable’.
2. Enter the global configuration mode by typing the command ‘configure terminal’.
3. Create a subinterface for each VLAN by typing the command ‘int (interface number).(subinterface number)’, replacing ‘(interface number)’ with the router’s main interface number and ‘(subinterface number)’ with the VLAN number.
4. Assign an IP address to the subinterface by typing the command ‘ip address (IP address) (subnet mask)’.
5. Activate the subinterface by typing the command ‘no shutdown’.
6. Set the VLAN membership for the subinterface by typing the command ‘encapsulation dot1q (VLAN ID)’.
7. Repeat the same process to create additional subinterfaces for other VLANs.
8. Configure other features as required, such as routing protocols or access control lists.
9. Save the configuration changes by typing the command ‘write memory’.