rom VLAN 1 to be added to VLAN 10. IOS Using VLAN Database This method is included for the sake of completeness. Older switches that require this method of configuration are no doubt still deployed. IOS switches that support the VLAN database, such as the 3750, actually display this message when you enter VLAN database configuration mode: 3750-IOS#vlan database % Warning: It is recommended to configure VLAN from config mode, as VLAN database mode is being deprecated. Please consult user documentation for configuring VTP/VLAN in config mode. If you have an IOS switch with active VLANs, but no reference is made to them in the running configuration, it's possible they were configured in the VLAN database. Another possibility is that they were learned via VTP (we will cover this in Chapter 6). On 3750s, when the switch is in VTP server mode, even when you configure VLANs in CLI, they do not appear in the running configuration. Since you're more likely to see the VLAN database in older switches, I'll continue with examples from a 2950, though they all behave pretty similarly. If you find any switch configured using the VLAN database, my advice is to convert it to an IOS configuration. To configure VLANs in the VLAN database, you must enter VLAN database configu- ration mode with the command vlan database. Requesting help (?) lists the commands available in this mode: 2950-IOS#vlan database 2950-I0S(vlan)# ? VLAN database editing buffer manipulation commands: abort Exit mode without applying the changes apply Apply current changes and bump revision number Apply changes, bump revision number, and exit mode Negate a command or set its defaults reset Abandon current changes and reread current database Show database information Add, delete, or modify values associated with a single VLAN Perform VTP administrative functions. Configuring VLANs To create a VLAN, give the vlan command followed by the VLAN number and name: 2950-I0S(vlan)#vlan 10 name Lab-VLAN VLAN 10 added: Name: Lab-VLAN You can show the VLANs configured from 