Router forcing my devices to reset IP lease every 15 mins

[Riquez]

I am having an issue where the router seems to be forcing devices on my network to renew the IP lease. This is causing a big problem for me being able to stream music, video etc in the house because playback will exit every 15 mins when this event occurs.
It happens at exactly 11, 26, 41 & 56 mins past every hour.
After some research on other forums I heard it is a bug in TalkTalk routers not following protocol.

- Can TalkTalk provide me a different router without this issue?

- What other options do I have?

Here is an example of the IP lease changing on my RaspberryPi

(journalctl -r)

Sep 15 10:11:59 raspberrypi avahi-daemon[374]: Registering new address record for 192.168.1.102 on wlan0.IPv4.
Sep 15 10:11:59 raspberrypi avahi-daemon[374]: New relevant interface wlan0.IPv4 for mDNS.
Sep 15 10:11:59 raspberrypi dhcpcd[455]: wlan0: adding default route via 192.168.1.1
Sep 15 10:11:59 raspberrypi dhcpcd[455]: wlan0: adding route to 192.168.1.0/24
Sep 15 10:11:59 raspberrypi avahi-daemon[374]: Joining mDNS multicast group on interface wlan0.IPv4 with address 192.168.1.102.
Sep 15 10:11:59 raspberrypi dhcpcd[455]: wlan0: leased 192.168.1.102 for 86400 seconds
Sep 15 10:11:54 raspberrypi dhcpcd[455]: wlan0: probing address 192.168.1.102/24
Sep 15 10:11:54 raspberrypi dhcpcd[455]: wlan0: rebinding lease of 192.168.1.102
Sep 15 10:11:54 raspberrypi dhcpcd[455]: wlan0: deleting default route via 192.168.1.1
Sep 15 10:11:54 raspberrypi dhcpcd[455]: wlan0: deleting route to 192.168.1.0/24
Sep 15 10:11:54 raspberrypi avahi-daemon[374]: Interface wlan0.IPv4 no longer relevant for mDNS.
Sep 15 10:11:54 raspberrypi avahi-daemon[374]: Leaving mDNS multicast group on interface wlan0.IPv4 with address 192.168.1.102.
Sep 15 10:11:54 raspberrypi avahi-daemon[374]: Withdrawing address record for 192.168.1.102 on wlan0.
Sep 15 10:11:54 raspberrypi dhcpcd[455]: wlan0: 10 second defence failed for 192.168.1.102
Sep 15 10:11:54 raspberrypi dhcpcd[455]: wlan0: hardware address 00:00:00:00:00:00 claims 192.168.1.102
Sep 15 10:11:53 raspberrypi dhcpcd[455]: wlan0: hardware address 00:00:00:00:00:00 claims 192.168.1.102

[KeithFrench]

Hi @Riquez 

To prove what is happening would require you to run Wireshark on the pi, does it support this?

[Riquez]

Hi Keith, you could well be right. The only thing is that ive been using several RPi's since 2016 & this has never been an issue before, across several routers & ISPs. Even using my phone as hotspot is no issue. It would certainly be great to find out for sure. Im just glad I can watch my media again 😅 Phew!

[KeithFrench]

Hi @Riquez 

As I said all through this thread, it was never the router that was at fault, it is the client not respecting its role in DHCP. I even provided a link to an independent site outlining the way that DHCP leases work.

Glad to hear that you have sorted your Pi by reconfiguring it.

[Michelle-TalkTalk]

Hi,

Ok thank you 🙂

Thanks

[Riquez]

Morning, please check my last post, I found a possible solution.
But it would be good to find out for sure if this is a router or client issue, so I will try to check with another router & report back. Thanks for your help so far.

[Michelle-TalkTalk]

Hi,

Ok please let us know how you get on.

Thanks

[Riquez]

I have possibly found a workaround/solution.

On advice from another forum I changed my RaspberryPi network software from dhcpcd to NetworkManager.
I do not see the IP lease msg in my log & I was able to stream over 30 mins without issue.
I will test further today & confirm if this has worked.

For reference: I installed Raspbian Buster headless. Connected to ethernet, run 'sudo raspi-config' & change Advanced>Network to NetworkManager. Then run 'nmtui' from the terminal & set up wi-fi credentials.

[Michelle-TalkTalk]

Morning,

The team have advised that they can't see any issues that would be causing this. I've re-checked the connection stats and they also look ok. Do you have an alternative router that you can test with please?

Thanks

[mitchgixer6]

This is sounds suspiciously like it's an issue with the router renewing the lease with the Talk Talk servers. For some reason TT use a 15 minute lease for the connection to their servers which basically provide your Internet.

If you have or can get a loan of a 3rd party router it would be worth trying that to see if it helps 

[Michelle-TalkTalk]

Hi,

Ok thanks for confirming and I will raise this with our Products Team now and will post back once I know more.

Thanks

[Riquez]

---

@Michelle-TalkTalk wrote:

Is it still happening at the exact same times as mentioned in your first post?

---

Yes. 11, 26, 41, 56 mins past. I checked again now.
The router has been left off overnight & the RPi rebooted several times since that first post, but the times of the lease change is exactly the same regardless. So it's not just 'every 15 mins', it's at those specific 15-min intervals.

[Michelle-TalkTalk]

Morning,

Ok, leave this with me. Is it still happening at the exact same times as mentioned in your first post?

Thanks

[Riquez]

Morning Michelle, Yes it is.

[Michelle-TalkTalk]

Morning,

Is this still happening since your last post?

Thanks

[KeithFrench]

Yes, that is a weird MAC address, especially as it is two bytes shorter than it should be. Did you miss two bytes off of it?

[Riquez]

I did read that Keith, thanks.
The log does confirm the lease is

leased 192.168.1.102 for 86400 seconds

 but it is being claimed by 00:00:00:00 every 15 mins. Thats a weird MAC address & 15 mins is very short. Ive been running this RPi for years, but only now is this issue showing up (new TalkTalk router)

[KeithFrench]

Hi @Riquez 

I said in my post #2, the way that DHCP leasing works is that the router allocates the IP address & informs the client of the lease time (normally a day on TT routers). Then when 50% of the lease time has expired, it is the responsibility of the client to request an extension to that lease that the DHCP server will grant.

Please see this site that confirms what I have said:-

https://www.serverbrain.org/network-services-2003/how-the-dhcp-lease-renewal-process-works-1.html#:~... 

[Gliwmaeden2]

Staff will reply after the weekend, @Riquez.

[Riquez]

I turned it off over-night but the issue remains. Every 15 mins my RPi is forced to release IP.

dhcpcd[454]: wlan0: hardware address 00:00:00:00:00:00 claims 192.168.1.102

For your reference, here is the thread I have been chasing down the problem on RPi forums.
https://forums.raspberrypi.com/viewtopic.php?t=340202

[Chris-TalkTalk]

Hi Riquez,

Thanks for updating your profile. Line test is clear, could you switch your router off and leave it off for at least 30 minutes then switch back on and retest - please let us know how you get on

Chris