sh ver #you need a k9 version image, update if needed ip domain-name yourdomain.com ... ...
test cable-diagnostics tdr interface gigabitEthernet1/0/1 show cable-diagnostics tdr interface gigabitEthernet1/0/1
show interface status
show mac-address-table
debug ip packet detail # don't do this on high traffic switch! ping 12.0.0.2 no debug ip packet detail
show run vlan
or
vlan database show
enable conf t interface GigabitEthernet1/0/1 switchport access vlan 600 ctrl-z write
interface vlan 800 description "text"
Put interfaces in VLAN 1, then…
enable conf t no vlan 600 ctrl-z write
You can also delete a range
no vlan 2-200
enable conf t interface vlan 600 ip address 1.2.3.4 255.255.255.0 ctrl-z ip default gateway 1.2.3.1 ctrl-z write
enable conf t interface GigabitEthernet1/0/1 switchport host switchport access vlan 600 ctrl-z write
Change name to Null.
enable conf t vtp domain Null ctrl-z show vtp status write
enable conf t vtp mode transparent ctrl-z show vtp status write