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Router Logs confusion

Murasaki
By Murasaki
in Networking
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Go to solution Solved by Skiiwee29,

What is your DHCP lease timer? Normally its 24hrs, I wonder if yours is different. Usually at the half life, or 50% time remaining on the lease, your device will reach out to the DHCP server and be like hey I going to be needing a new IP soon is this still available. Seems like that maybe what is going on then. 

Posted

I took a look at my router's system log earlier and saw this wall of notices. (MAC addresses have been removed)

Spoiler

Jul 27 05:27:02     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 27 06:27:02     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 27 06:27:02     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 27 16:48:44     DHCP          NOTICE     DHCPS:Recv DISCOVER from 
Jul 27 16:48:44     DHCP          NOTICE     DHCPS:Send OFFER with ip 192.168.1.100
Jul 27 16:48:44     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 27 16:48:44     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 27 16:50:41     DHCP          NOTICE     DHCPS:Recv DISCOVER from 
Jul 27 16:50:42     DHCP          NOTICE     DHCPS:Send OFFER with ip 192.168.1.101
Jul 27 16:50:42     DHCP          NOTICE     DHCPS:Recv DISCOVER from 
Jul 27 16:50:42     DHCP          NOTICE     DHCPS:Send OFFER with ip 192.168.1.101
Jul 27 16:50:42     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 27 16:50:42     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.101
Jul 27 17:48:44     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 27 17:48:44     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 27 17:50:42     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 27 17:50:42     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.101
Jul 27 18:48:44     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 27 18:48:44     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 27 18:50:42     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 27 18:50:42     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.101
Jul 27 19:48:44     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 27 19:48:44     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 27 19:50:42     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 27 19:50:42     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.101
Jul 27 20:48:44     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 27 20:48:44     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 27 20:50:42     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 27 20:50:42     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.101
Jul 27 21:48:44     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 27 21:48:44     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 27 21:50:42     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 27 21:50:42     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.101
Jul 27 22:48:44     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 27 22:48:44     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 27 22:50:42     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 27 22:50:42     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.101
Jul 27 23:48:44     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 27 23:48:44     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 27 23:50:42     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 27 23:50:42     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.101
Jul 28 00:48:44     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 28 00:48:44     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 28 01:48:44     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 28 01:48:44     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 28 02:48:44     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 28 02:48:44     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 28 03:48:43     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 28 03:48:43     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 28 04:48:43     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 28 04:48:43     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 28 05:48:44     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 28 05:48:44     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 28 06:48:43     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 28 06:48:43     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 28 16:51:13     DHCP          NOTICE     DHCPS:Recv DISCOVER from 
Jul 28 16:51:13     DHCP          NOTICE     DHCPS:Send OFFER with ip 192.168.1.100
Jul 28 16:51:13     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 28 16:51:13     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 28 16:53:31     DHCP          NOTICE     DHCPS:Recv DISCOVER from 
Jul 28 16:53:32     DHCP          NOTICE     DHCPS:Send OFFER with ip 192.168.1.101
Jul 28 16:53:32     DHCP          NOTICE     DHCPS:Recv DISCOVER from 
Jul 28 16:53:32     DHCP          NOTICE     DHCPS:Send OFFER with ip 192.168.1.101
Jul 28 16:53:32     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 28 16:53:32     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.101
Jul 28 17:51:13     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 28 17:51:13     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 28 17:53:32     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 28 17:53:32     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.101
Jul 28 18:51:13     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 28 18:51:13     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 28 18:53:32     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 28 18:53:32     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.101
Jul 28 19:51:13     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 28 19:51:13     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 28 19:53:32     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 28 19:53:32     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.101
Jul 28 20:51:13     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 28 20:51:13     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 28 20:53:31     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 28 20:53:31     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.101
Jul 28 21:51:14     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 28 21:51:14     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 28 21:53:31     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 28 21:53:31     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.101
Jul 28 22:51:23     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 28 22:51:23     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 28 22:53:31     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 28 22:53:31     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.101
Jul 28 23:51:33     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 28 23:51:33     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 29 00:51:42     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 29 00:51:42     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 29 01:51:53     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 29 01:51:53     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 29 02:52:01     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 29 02:52:01     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 29 03:52:02     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 29 03:52:02     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 29 04:52:01     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 29 04:52:01     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 29 05:52:01     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 29 05:52:01     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 29 06:52:01     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 29 06:52:01     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 29 07:01:04     DHCP          NOTICE     DHCPS:Recv DISCOVER from 
Jul 29 07:01:05     DHCP          NOTICE     DHCPS:Send OFFER with ip 192.168.1.101
Jul 29 07:01:05     DHCP          NOTICE     DHCPS:Recv DISCOVER from 
Jul 29 07:01:05     DHCP          NOTICE     DHCPS:Send OFFER with ip 192.168.1.101
Jul 29 07:01:05     DHCP          NOTICE     DHCPS:Recv DISCOVER from 
Jul 29 07:01:05     DHCP          NOTICE     DHCPS:Send OFFER with ip 192.168.1.101
Jul 29 07:01:05     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 29 07:01:05     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.101
Jul 29 15:31:01     DHCP          NOTICE     DHCPS:Recv DISCOVER from 
Jul 29 15:31:01     DHCP          NOTICE     DHCPS:Send OFFER with ip 192.168.1.100
Jul 29 15:31:01     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 29 15:31:01     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 29 15:55:04     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 29 15:55:04     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 29 16:15:29     DHCP          NOTICE     DHCPS:Recv DISCOVER from 
Jul 29 16:15:30     DHCP          NOTICE     DHCPS:Send OFFER with ip 192.168.1.101
Jul 29 16:15:30     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 29 16:15:30     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.101
Jul 29 16:16:44     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 29 16:16:44     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.101
Jul 29 16:36:08     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 29 16:36:08     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.101
Jul 29 16:36:08     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 29 16:36:08     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.101
Jul 29 16:37:40     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 29 16:37:40     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.101
Jul 29 16:44:38     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 29 16:44:38     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.101
Jul 29 16:44:38     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 29 16:44:38     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.101
Jul 29 16:44:38     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 29 16:44:38     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.101
Jul 29 16:55:04     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 29 16:55:04     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 29 17:44:37     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 29 17:44:37     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.101
Jul 29 17:55:04     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 29 17:55:04     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 29 18:44:37     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 29 18:44:37     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.101
Jul 29 18:55:04     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 29 18:55:04     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 29 19:44:37     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 29 19:44:37     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.101
Jul 29 19:55:04     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 29 19:55:04     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 29 20:44:37     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 29 20:44:37     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.101
Jul 29 20:55:04     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 29 20:55:04     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 29 21:44:37     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 29 21:44:37     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.101
Jul 29 21:55:04     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 29 21:55:04     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 29 22:44:37     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 29 22:44:37     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.101
Jul 29 22:55:04     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 29 22:55:04     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 29 23:44:37     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 29 23:44:37     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.101
Jul 29 23:55:03     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 29 23:55:03     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 30 00:44:37     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 30 00:44:37     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.101
Jul 30 00:55:03     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 30 00:55:03     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 30 01:55:04     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 30 01:55:04     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 30 02:55:03     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 30 02:55:03     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 30 03:55:03     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 30 03:55:03     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 30 04:55:03     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 30 04:55:03     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 30 05:55:03     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 30 05:55:03     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 30 06:55:03     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 30 06:55:03     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 30 07:55:03     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 30 07:55:03     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 30 08:55:03     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 30 08:55:03     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 30 09:55:03     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 30 09:55:03     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 30 10:55:03     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 30 10:55:03     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 30 11:02:32     DHCP          NOTICE     DHCPS:Recv DISCOVER from 
Jul 30 11:02:33     DHCP          NOTICE     DHCPS:Send OFFER with ip 192.168.1.101
Jul 30 11:02:33     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 30 11:02:33     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.101
Jul 30 11:55:03     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 30 11:55:03     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.100
Jul 30 12:02:33     DHCP          NOTICE     DHCPS:Recv REQUEST from 
Jul 30 12:02:33     DHCP          NOTICE     DHCPS:Send ACK to 192.168.1.101

These requests are done by 2 MAC addresses, 1 being my Lumia 640 and the other one by my motherboard apparently, I've looked up the MAC address and it is used by ASRock. I don't really get it.

It makes sense for my phone but my motherboard?? I'm clueless on this so would be glad if someone can shed some light to my bafoonery.

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Posted

Do you lose internet connection frequently?

Community Standards | Fan Control Software

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Just because I am a Moderator does not mean I am always right. Please fact check me and verify my answer. 

 

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Posted
  • Author
Just now, legacy99 said:

Do you lose internet connection frequently?

Nope. Haven't had problems with it.

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Posted
  • Solution

What is your DHCP lease timer? Normally its 24hrs, I wonder if yours is different. Usually at the half life, or 50% time remaining on the lease, your device will reach out to the DHCP server and be like hey I going to be needing a new IP soon is this still available. Seems like that maybe what is going on then. 

Community Standards | Fan Control Software

Please make sure to Quote me or @ me to see your reply!

Just because I am a Moderator does not mean I am always right. Please fact check me and verify my answer. 

 

"Black Out"

Ryzen 9 5900x | Full Custom Water Loop | Asus Crosshair VIII Hero (Wi-Fi) | RTX 3090 Founders | Ballistix 32gb 16-18-18-36 3600mhz 

1tb Samsung 970 Evo | 2x 2tb Crucial MX500 SSD | Fractal Design Meshify S2 | Corsair HX1200 PSU

 

Dedicated Streaming Rig

 Ryzen 7 3700x | Asus B450-F Strix | 16gb Gskill Flare X 3200mhz | Corsair RM550x PSU | Asus Strix GTX1070 | 250gb 860 Evo m.2

Phanteks P300A |  Elgato HD60 Pro | Avermedia Live Gamer Duo | Avermedia 4k GC573 Capture Card

 

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3 minutes ago, legacy99 said:

What is your DHCP lease timer? Normally its 24hrs, I wonder if yours is different. Usually at the half life, or 50% time remaining on the lease, your device will reach out to the DHCP server and be like hey I going to be needing a new IP soon is this still available. Seems like that maybe what is going on then. 

TiffFgPG.png

 

24hours > 2 hours damn.

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2 minutes ago, ModuleLFS said:

TiffFgPG.png

 

24hours > 2 hours damn.

Yep, that would be why then, change it back to 24hrs, or even longer if you would like and you should see those messages much less frequently. 

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Just now, legacy99 said:

Yep, that would be why then, change it back to 24hrs, or even longer if you would like and you should see those messages much less frequently. 

I've checked my network settings, that 2nd MAC address is my own lmao im so silly.

Though what boggles me is that the default value is 120. Probably was never touched. Does it matter much? Router is TP-LINK TL-WR841N by the way.

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Just now, ModuleLFS said:

I've checked my network settings, that 2nd MAC address is my own lmao im so silly.

Though what boggles me is that the default value is 120. Probably was never touched. Does it matter much? Router is TP-LINK TL-WR841N by the way.

No not really honestly. I am sure you can filter those messages out too. They are helpful for debugging things, I use DHCP Debugging in my CMTS's alot, which is what cable modems connect too to get internet. 

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3 minutes ago, legacy99 said:

No not really honestly. I am sure you can filter those messages out too. They are helpful for debugging things, I use DHCP Debugging in my CMTS's alot, which is what cable modems connect too to get internet. 

Okay, I'll set it to 1440mins (24hrs). Thanks for the help xD 

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The length of DHCP leases doesn't matter until you get to the point of having hundreds of devices on a network, like on a college campus or other public place with lots of people coming and going. If the lease time is too long in that case, the network ends up with lots of inactive IP addresses. But if you make the lease time too short, then the amount of network traffic devoted to DHCP can become a large percentage of network thoughput - especially on wireless, since most parts of DHCP are broadcast traffic. You also start seeing significant CPU usage on the DHCP server.

 

For a small network, the number doesn't matter, but most people put 24 hours because that makes sense in a human way. For public wifi and similar networks, 30 minutes to 2 hours is common, and is up to the admin. And for some odd reason, the default on Mikrotik routers is 10 minutes. I've never heard the rational for that one.

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