How to adjust the IP address of the core switch

To change a core switch IP address, configure the management VLAN interface with the new IP and subnet mask, then save the configuration to apply the change.Step-by-Step Guide1. Access the Switch CLI or GUIConnect via console cable, SSH, or web GUI depending on your switch model .For CLI, enter privileged EXEC mode using the enable command and your password . 2. Enter Global Configuration ModeIn CLI, type configure terminal to access global configuration mode . 3. Select the Management InterfaceTypically, the management interface is VLAN 1. Enter interface configuration mode:CodeCopyinterface vlan 1 For multilayer switches, ensure the interface is Layer 3 enabled before assigning an IP . 4. Assign the New IP Address and Subnet MaskUse the command:CodeCopyip address [new-ip-address] [subnet-mask] Example:CodeCopyip address 192.168.1.100 255.255.255.0 If needed, also configure the default gateway for external network access:CodeCopyip default-gateway [gateway-ip] 5. Activate the InterfaceBring the interface up with:CodeCopyno shutdown 6. Save the ConfigurationSave changes to ensure they persist after a reboot:CodeCopycopy running-config startup-config Alternatively, in some switches, use write memory . 7. Verify ConnectivityAfter changing the IP, reconnect using the new IP address. Test with ping or by accessing the GUI/CLI to confirm network connectivity .Best PracticesPerform the change during a maintenance window to avoid network disruption .Back up the current configuration before making changes.Ensure the new IP address is unique and fits your network addressing plan .If the switch is part of a stack, configure a static IP to prevent conflicts during failover . Following these steps ensures a smooth transition to a new management IP address without losing access to the core switch.