Mikrotik RouterOS DHCP Notes

This page is under construction and is not yet accurate.

If you have any problems with the DHCP server (maybe it didn't hand out a gateway address?), try deleting all existing pools and all existing DHCP servers, then run the DHCP Setup Wizard. In fact, this is probably the fastest, easiest way to configure the DHCP server in most all cases.

• Voice traffic is on VLAN 200 in this example
• Factory defaulted phones boot up on the data VLAN 1
• Option 2 (Time Offset hex value 0xffff9d90 is GMT-7 hours or -25200 seconds)
• Option 66 (TFTP Server)
• Option 160 (Polycom server)

/ip pool
add name=dhcp_pool1 ranges=192.168.62.65-192.168.62.199

/ip dhcp-server
add address-pool=dhcp_pool1 disabled=no interface=bridge lease-time=1d name="LAN DHCP"
/ip dhcp-server option
add code=2 name=time-offset value=0xffff9d90
add code=66 name=tftp-server value="'http://192.168.61.30:83/'"
add code=160 name=polycom-server value="'http://192.168.61.30:83/'"
/ip dhcp-server network
add address=192.168.62.0/24 dhcp-option=polycom-server,tftp-server,time-offset dns-server=\
    8.8.8.8,8.8.4.4 domain=mydomain.local gateway=192.168.62.1 netmask=24 next-server=\
    192.168.61.30 ntp-server=192.168.61.1

• Option 43 (Yealink, Ubiquiti, Ruckus and others)
• Option 132 (Voice VLAN; most phones want text string)
• Option

LLDP and manual VLAN configurations override DHCP option 132. Factory-reset your phones to be sure manual configurations are nullified.

/ip dhcp-server
add add-arp=yes address-pool=DataPool always-broa
    interface=vlan1 name=DHCPdata
add add-arp=yes address-pool=VoicePool disabled=n
    DHCPvoice

/ip dhcp-server option
add code=132 name=VoiceVLAN value="s'200'"

/ip dhcp-server config
set store-leases-disk=10m

/ip dhcp-server network
add address=192.168.1.0/24 dhcp-option=VoiceVLAN 
    gateway=192.168.1.1
add address=192.168.88.0/24 comment="default conf
    209.244.0.3,8.8.8.8 gateway=192.168.88.1 netm
add address=192.168.200.0/24 dns-server=8.8.8.8,8.8.4.4 gateway=\
    192.168.200.1