I do remember my first dhcp server I ever set up was a Linux machine 12 years ago. Every time people say windows dhcp server for vlans and I smiled.

Any way keep in mind, Linux kernel which have support for 802.q will able to serve dhcp service also.

For example here:

# yum install dhcpd      (for fedora or rhel /cent)
# dnf install dhcpd      (for fedora 22+)
# apt-get install dhcpd  (for Ubuntu or Debian)

Create virtual interfaces, you do no need more physical interfaces, in example to make 3 vlan 10.10.10.x, 10.10.20.x, and 10.10.30.x

# nmcli con modify type vlan ifname vlan10 dev ens33 id 10 ip4 10.10.10.1/24 gw4 10.10.10.254
# nmcli con add type vlan ifname vlan10 dev ens33 id 10 ip4 10.10.10.1/24 gw4 10.10.10.254
# nmcli con add type vlan ifname vlan20 dev ens33 id 20 ip4 10.10.20.1/24 gw4 10.10.20.254
# nmcli con add type vlan ifname vlan30 dev ens33 id 30 ip4 10.10.30.1/24 gw4 10.10.30.254

This for fedora or rhel latest versions.

For Ubuntu and Debian, command is:

# vconfig add ens33 10
# vconfig add ens33 20

Then, configure the network settings for the VLAN interfaces:

# ip addr add 10.10.10.1/24 dev ens33.10

Bring up the VLAN interface:

# ip link set eth33.10 up 

Do for all interfaces in Ubuntu and then check ip address and see virutal interfaces pinging..

Nex, open dhcpd.conf file and edit as follows.

# option definitions common to all supported networks...
option domain-name "example.org";
option domain-name-servers ns1.example.org, ns2.example.org;

default-lease-time 600;
max-lease-time 7200;

# Use this to enble / disable dynamic dns updates globally.
#ddns-update-style none;

# If this DHCP server is the official DHCP server for the local
# network, the authoritative directive should be uncommented.
#authoritative;

# Use this to send dhcp log messages to a different log file (you also
# have to hack syslog.conf to complete the redirection).
log-facility local7;

# No service will be given on this subnet, but declaring it helps the 
# DHCP server to understand the network topology.

subnet 10.10.0.0 netmask 255.255.0.0 {
}

# This is a very basic subnet declaration.

subnet 10.10.10.0 netmask 255.255.255.0 {
  range 10.10.10.1 10.10.10.20;
  option routers 10.10.10.1;
}
subnet 10.10.20.0 netmask 255.255.255.0 {
  range 10.10.20.1 10.10.20.20;
  option routers 10.10.20.1;
}
  subnet 10.10.30.0 netmask 255.255.255.0 {
  range 10.10.30.1 10.10.30.20;
  option routers 10.10.30.1;
}

save the file and start the service and your good to go.

Connect to trunk port of switch and check it. Any doubts, do let me know.

my email :hafeezisbad@yahoo.com

D’jems,

This particular server only has one NIC. On the network that it was used in, the Cisco router was setup with an ip helper address for other vlans.