Community discussions

MikroTik App
 
User avatar
archerious
Member Candidate
Member Candidate
Topic Author
Posts: 120
Joined: Sun Aug 26, 2018 7:50 am
Location: USA
Contact:

Dumb DHCP Server Question

Sun Jan 26, 2020 3:47 am

What does "Add ARP for leases" do?

Some of the DHCP servers have it set to yes, others no.

Honest to god don't know what that does, I tried searching around but I got mixed information. Some sites/old posts said it means only DHCP can add leases to ARP, not like statically assigned. Others said the opposite, that it ensures DHCP works when I right click them when they have "D" status and make static in winbox.

This is something that is on my mind a lot coming from Ubiquiti routers.

Many thanks for any replies! :)

Image
UDM-Pro Former: RB4011, CCR2004, hEX, ER4
Aruba 2930F, CSS326, CRS309, CRS112-PoE Former: Ubiquiti XG-16 & ES-10X
Wireless Wire
AT&T Fiber 1000/1000
http://tlopez.cc/images/hex_is_a_beast.PNG
http://tlopez.cc/images/ccr2004_speedtest.png
 
User avatar
CZFan
Forum Guru
Forum Guru
Posts: 1694
Joined: Sun Oct 09, 2016 8:25 pm
Location: South Africa, Randburg
Contact:

Re: Dumb DHCP Server Question

Sun Jan 26, 2020 4:42 am

My understanding is that it is suppose to add MACs from DHCP clients dynamically to ARP table, then you can prevent people using static IP config by setting interface ARP mode to reply only.

Have not tested it myself yet, but IIRC, read a couple of posts saying it does not work
MTCNA, MTCTCE, MTCRE & MTCINE
 
User avatar
archerious
Member Candidate
Member Candidate
Topic Author
Posts: 120
Joined: Sun Aug 26, 2018 7:50 am
Location: USA
Contact:

Re: Dumb DHCP Server Question

Sun Jan 26, 2020 5:55 am

My understanding is that it is suppose to add MACs from DHCP clients dynamically to ARP table, then you can prevent people using static IP config by setting interface ARP mode to reply only.

Have not tested it myself yet, but IIRC, read a couple of posts saying it does not work
Thank you for the reply, so just to confirm it's fine to leave "Add ARP for leases" off/no?
UDM-Pro Former: RB4011, CCR2004, hEX, ER4
Aruba 2930F, CSS326, CRS309, CRS112-PoE Former: Ubiquiti XG-16 & ES-10X
Wireless Wire
AT&T Fiber 1000/1000
http://tlopez.cc/images/hex_is_a_beast.PNG
http://tlopez.cc/images/ccr2004_speedtest.png
 
User avatar
CZFan
Forum Guru
Forum Guru
Posts: 1694
Joined: Sun Oct 09, 2016 8:25 pm
Location: South Africa, Randburg
Contact:

Re: Dumb DHCP Server Question

Sun Jan 26, 2020 2:17 pm

Depends on your requirements, but typically, read default, it is off
MTCNA, MTCTCE, MTCRE & MTCINE

Who is online

Users browsing this forum: Sob and 37 guests