Enable DHCP Service
service dhcp
Create desired vlan
vlan 149
Assign IP Address to VLAN interface
int vlan 149
ip address 192.168.149.1 255.255.255.0
Exclude vlan interface IP Address from dhcp pool
ip dhcp excluded-address 192.168.149.1
Create DHCP Server Pool
ip dhcp pool VLAN149
network 192.168.149.0 255.255.255.0
default-router 192.168.149.1
dns-server 8.8.8.8
Now assign VLAN to specific interface as access port or trunk port.