====== Mikrotik RouterOS DHCP Notes ======

FIXME This page is under construction and is not yet accurate.

===== DHCP Server =====

:!: 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.

==== Data VLAN Scope ====

  * 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)

<file>
/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
</file>

==== Voice VLAN Scope ====

  * 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.

<file>
/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
</file>

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