VLAN (Virtual LAN) is a method to solve about confusion at network,
this is step by step of create a VLAN

1. make pool ip addres for vlan"ip dhcp pool vlan1-E1"
"network 192.168.1.0 255.255.255.0"
"default route 192.168.1.1"
"dns-server 8.8.8.8"
2. set the ip address at switch L3 to communicated with L3"interface fastethernet 0/1"
"ip address 10.10.10.1 255.255.255.252"
3. make trunk interface
"interface fastethernet 0/2"
"switcthport trunk encapsulation dot1q"
"switchport mode trunk"
4. make vlan and install ip address at vlan
"interface vlan1"
"ip address 192.168.1.1 255.255.255.0"
5. make route
"ip route 0.0.0.0 0.0.0.0 10.10.10.2"

VLAN 1 success to create