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AKLGUY
Guide

Increasing DHCP lease time

I have only had my Orbi RBK50 for just over a week now.

Once I had the ethernet backhaul sorted (The trouble was there was a switch between the Orbi Router and Satelitte with other devices on too. I moved the LAN so it was between the two Orbi units and have the in one of the other LAN on the Satelitte, Now running smooth for 3 days and no further issues.

 

But what I would like to do now is, Increase the DHCP lease time, The Orbi logs are just bombarded with DCHP notifications.

I can not see anything in the settings yet for this. But it looks like the setting is 1 hour at the moment.


****
From New Zealand, 950/450MB Fibre connection, RN316 NAS, Orbi RBK50
Model: RBK50| Orbi AC3000 High-Performance Tri-Band WiFi System
Message 1 of 11
AKLGUY
Guide

Re: Increasing DHCP lease time

Correction Lease time is 24 hours. It just seems that is iphones that are continuelly getting DHCP address.


****
From New Zealand, 950/450MB Fibre connection, RN316 NAS, Orbi RBK50
Message 2 of 11
FURRYe38
Guru

Re: Increasing DHCP lease time

Set your devices up for IP address reservations.

I would change the default IP address pool from 192.168.1.2 thru .254 to 192.168.100 thru .200.

 

My Setup (Cable 1Gbps/50Mbps)>CM1200 v2.02.03(LAG Disabled)>RBK853 v3.2.17.12
RBK50 v2.7.2.104(WW) Circle Enabled
Additional NG HW: C7800/CM1100/CAX80/CM2000, Orbi CBK40, R7800, R7960P, EX7500/EX7700, XR450 and WNHDE111
Message 3 of 11
AKLGUY
Guide

Re: Increasing DHCP lease time

I already have the pool from 10.0.0.2-10.0.0.254 to 10.0.0.20-254 leaving the 10.0.0.2-10.0.0.19 for Internal servers/Printers/security cameras guess a smaller pool wont hurt 


****
From New Zealand, 950/450MB Fibre connection, RN316 NAS, Orbi RBK50
Message 4 of 11
FURRYe38
Guru

Re: Increasing DHCP lease time

The pool should be as big as you need and just a bit over to allow for growth. 100 IPs is good enough for most homes.

My Setup (Cable 1Gbps/50Mbps)>CM1200 v2.02.03(LAG Disabled)>RBK853 v3.2.17.12
RBK50 v2.7.2.104(WW) Circle Enabled
Additional NG HW: C7800/CM1100/CAX80/CM2000, Orbi CBK40, R7800, R7960P, EX7500/EX7700, XR450 and WNHDE111
Message 5 of 11
RocketSquirrel
Luminary

Re: Increasing DHCP lease time

I have also found iOS devices, and a few others, to be obnoxious in their constant DHCP requests. My solution was to give *every* device on my network a static address, or a reserved address if static wasn’t possible. (E.g., my HP OfficeJet printer forgets its static address after a power outage.) No guesswork, few DHCP requests, I know every device’s address, and my LAN runs great. “Set and forget” is my recommendation.

Model: RBK53| Orbi Router + 2 Satellites Orbi WiFi System
Message 6 of 11
AKLGUY
Guide

Re: Increasing DHCP lease time


@RocketSquirrel wrote:

I have also found iOS devices, and a few others, to be obnoxious in their constant DHCP requests. My solution was to give *every* device on my network a static address, or a reserved address if static wasn’t possible. (E.g., my HP OfficeJet printer forgets its static address after a power outage.) No guesswork, few DHCP requests, I know every device’s address, and my LAN runs great. “Set and forget” is my recommendation.


Thank you @RocketSquirrel

I think I might move my DCHP pool up to x.x.x.100 and then move my Apple iOS/ATV devices to static IPs from the x.x.x.2x range.


****
From New Zealand, 950/450MB Fibre connection, RN316 NAS, Orbi RBK50
Message 7 of 11
FURRYe38
Guru

Re: Increasing DHCP lease time

Thats were I have some of my devices, ATV, printers, NAS and such. I reserve IPs for iphones and all my other devices that need some form of router management and internet access. 


@AKLGUY wrote:

I have only had my Orbi RBK50 for just over a week now.

Once I had the ethernet backhaul sorted (The trouble was there was a switch between the Orbi Router and Satelitte with other devices on too. I moved the LAN so it was between the two Orbi units and have the in one of the other LAN on the Satelitte, Now running smooth for 3 days and no further issues.

 

But what I would like to do now is, Increase the DHCP lease time, The Orbi logs are just bombarded with DCHP notifications.

I can not see anything in the settings yet for this. But it looks like the setting is 1 hour at the moment.


 

My Setup (Cable 1Gbps/50Mbps)>CM1200 v2.02.03(LAG Disabled)>RBK853 v3.2.17.12
RBK50 v2.7.2.104(WW) Circle Enabled
Additional NG HW: C7800/CM1100/CAX80/CM2000, Orbi CBK40, R7800, R7960P, EX7500/EX7700, XR450 and WNHDE111
Message 8 of 11
RocketSquirrel
Luminary

Re: Increasing DHCP lease time

I see no reason to use DHCP unless a particular device requires it. DHCP is for guests on my guest network and my few devices which don’t support static addresses. It’s an extra level of unneeded complexity and only adds another point of failure.

Model: RBK53| Orbi Router + 2 Satellites Orbi WiFi System
Message 9 of 11
AKLGUY
Guide

Re: Increasing DHCP lease time


@Case850 wrote:

@AKLGUY wrote: >>> The Orbi logs are just bombarded with DCHP notifications.

 

What do you mean by this? Are devices repeatedly making a DHCP request within a 24 hr period?

 


Yeah some times every time the phone wakes up. (from lock screen) Once had a request from one device every 30 seconds. But I stopped that by forgetting the AP inside the iphone and then rejoining, that has since seemed to stop the requests.


****
From New Zealand, 950/450MB Fibre connection, RN316 NAS, Orbi RBK50
Message 10 of 11
ekhalil
Master

Re: Increasing DHCP lease time

By monitoring the Orbi Logs, I can see that the DHCP lease time is set to 12 hours in Orbi. 

For devices that ar enot moving between router/satellite you will see the following message every exactly 12 hours:

[DHCP IP: 192.168.1.7] to MAC address e8:b1:fc:77:a0:29, Monday, October 29, 2018 18:06:50

[DHCP IP: 192.168.1.7] to MAC address e8:b1:fc:77:a0:29, Monday, October 29, 2018 06:06:49

 

Those DHCP messages will be sent regardless if you have set DHCP address reservations or not.

The client (your network device) will send a DHCP request when the lease time is out and then Orbi will send DHCP acknowledgement which is then logged in the Logs as above.

My Setup Internet Fiber ONT 250↓/250↑ISP Telenor | Wifi Router Orbi RBK50 AC3000, Router Mode, Wired Backhaul / Orbi RBK852 AX6000, Router Mode, Wireless Backhaul | Switches Netgear GS208Time Zone CET (Sweden)

Message 11 of 11
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