# Administring a Cisco Switch - Basics for the Homelab Usage ## Connecting to the Switch Only quite old ssh parameters are supported: ``` ssh -oKexAlgorithms=+diffie-hellman-group14-sha1 -oHostKeyAlgorithms=+ssh-rsa admin@192.168.2.1 ``` ## Saving the Configuration Never forget, otherwise after reboot changes are gone! ``` write memory ``` ## Configure VLANs Allow VLAN-IDs greater then 1005: ``` configure terminal vtp mode transparent exit ``` ``` configure terminal vlan 1001 name vlan1001 exit exit ``` The first `exit` leaves the interface, the second `exit` leaves the config session. If the VLAN should be used for management purposes it needs an IP address: ``` configure terminal vlan 2000 name vlan2000 ip address dhcp exit exit ``` Check your work: ``` show vlan ``` ## Configure Interfaces To check your work use ``` show interfaces status ``` ### Access Ports ``` configure terminal interface GigabitEthernet1/0/1 switchport mode access switchport access vlan 1001 spanning-tree portfast no shutdown exit exit ``` ### Trunk Ports ``` configure terminal interface GigabitEthernet1/0/23 switchport mode trunk switchport trunk allowed vlan 1012,3001,3002,3003,3004 switchport trunk native vlan 1012 no shutdown exit exit ``` `allowed` connects the port to the VLAN for tagged communication. `native` makes the VLAN untagged on that port.