switch (config) # service timestamps debug datetime msec
switch (config) # service timetamps log datetime msec
More than two and debug command to log onto the time-stamp marking. Oh, the log records when useful, you can see when other people use the router. Msec accuracy is back to the second meaning
local vlan: there is only one vlan on a switch or a wiring between.
end to end vlan: across multiple switches.

Another classification:
static VLAN: port-based
switch (config) # interface gigabitethernet 1 / 1
switch (config-if) # switchport mode access
switch (config-if) # switchport access vlan 3
Vverify Orders:
switch # show vlan
switch # show run interface g1 / 1
switch # show interface g1 / 1 switchport (see the second floor of a state)
switch # show mac-address-table interface (see interface on the mac-address-table)

dynamic VLAN: based on the MAC, based on the IP address (vmps server)

vlan configuration of two ways:
the first
switch # configure terninal
switch (config) # vlan 3
switch (config) # name v3
the secondary:
switch # vlan database
switch (vlan) vlan 3 name v3
In such a configuration mode, only the application or exit orders apply only after the entry into force, if the type abort, will be made to give up direct from the change.
Delete VLAN
switch (config) # no vlan 3
switch (config) # exit

switch # vlan databse
switch (vlan) # no vlan 3
switch (vlan) # exit