Ipad,iPhone spamming DHCP

[Carnagerover]

Just a quick question, I went into my router log tonight and it is full of DHCP requests from iPads and iPhones. Will this have a negative effect on the router, should I give them all static ip addresses?

 

[NeutralGold]

Just a quick question, I went into my router log tonight and it is full of DHCP requests from iPads and iPhones. Will this have a negative effect on the router, should I give them all static ip addresses?

You can safely ignore them unless you're having problems. Giving the device a static ip will get rid of the request though I believe, if you want to try.

That's mostly all I see in my logs day to day. They're more of an irritant than a problem. It would be nice to have an 'quiet-dhcp' option like tomato. Maybe Merlin can work something out in a future firmware.

 

[bluepoint]

Just a quick question, I went into my router log tonight and it is full of DHCP requests from iPads and iPhones. Will this have a negative effect on the router, should I give them all static ip addresses?

Giving iphones and ipads static ip's will not change the DHCP requests from them. It's normal for apple products cause I think iphones, ipads, ipods, ...etc are designed to disconnect the wifi when on standby to conserve battery.

 

[RMerlin]

You can safely ignore them unless you're having problems. Giving the device a static ip will get rid of the request though I believe, if you want to try.

That's mostly all I see in my logs day to day. They're more of an irritant than a problem. It would be nice to have an 'quiet-dhcp' option like tomato. Maybe Merlin can work something out in a future firmware.

Teddy_bear patched dnsmasq to add the option. I managed to track down his commit, shouldn't be a problem to implement.

 

[RMerlin]

Actually, looks like newer versions of dnsmasq have this implemented, only differently.

Try creating a dnsmasq.conf.add with this line:

log-dhcp=none

Looks like an undocumented feature - I see the source code checks if you set this option to "none", but that behaviour is not documented in the manpage.

 

[NeutralGold]

Hey thanks Merlin, I'll try that option sometime tonight when I get some free time. I had planned on asking about that feature at some point but kept forgetting about it.

As always, thanks for all your work with the firmware!

 

[test011]

I know this is an old thread, but I found a contradictory post elsewhere in the forum.

https://www.snbforums.com/threads/anyway-to-stop-the-dnsmasq-dhcp-915-in-the-system-log.8942/

the above post has " dhcp-log=none " as a option for dnsmasq.conf.add
This thread says " log-dhcp=none "

It seems both are talking about the same feature with different name. Could anyone clarify this?

I know recent Merlin firmware has an UI option to suppress dnsmasq-dhcp log (Just checked and I could not find it with 380.68.4, I thought I saw it somewhere), but John's fork does not yet, so I would like to give a shot at the manual setting.

 

[sfx2000]

ust a quick question, I went into my router log tonight and it is full of DHCP requests from iPads and iPhones. Will this have a negative effect on the router, should I give them all static ip addresses?

Don't worry about it - it's power saving on their side, and it's just to confirm that the IP is the same.

 

[sfx2000]

Teddy_bear patched dnsmasq to add the option. I managed to track down his commit, shouldn't be a problem to implement.

+  /* option to reduce excessive logging for DHCP packets */
+  if (option_bool(OPT_QUIET_DHCP) && strncmp(type, "DHCP", 4) == 0)
+    return;

See - no worries - even without the patch above...

 

[test011]

+  /* option to reduce excessive logging for DHCP packets */
+  if (option_bool(OPT_QUIET_DHCP) && strncmp(type, "DHCP", 4) == 0)
+    return;

See - no worries - even without the patch above...

Do you know how to do without the DHCP log? To me it's unnecessary logging which is bugging me.

neither log-dhcp=none nor dhcp-log=none works in dnsmasq.conf.add