networkmanager and dhcl_lease_time

[Michael Traxler]

Hello,

I have the following problem:
My DHCP-server gives all clients a lease time of
86400 seconds.

I can also see on the clients that this was recognized:

ufsd3:~ # nmcli connection show main | ag dhcp_lease
DHCP4.OPTION[3]:                        dhcp_lease_time = 86400

Now my problem is, that I expect after half a day, a new DHCP request to renew
the DHCP lease.

But what I get is, that the clients (many of them) send every 60 seconds a new
DHCP request:

# tshark  -i eno2 -f "port 67 or port 68"
     6 60.354801706 192.168.103.123 → 192.168.100.50 DHCP 325 DHCP Request  - Transaction ID 0x4b7f2ef1
     7 60.355285370 192.168.105.51 → 192.168.103.123 DHCP 342 DHCP ACK      - Transaction ID 0x4b7f2ef1
     9 120.697304414 192.168.103.123 → 192.168.100.50 DHCP 325 DHCP Request  - Transaction ID 0xd90c71b5
    10 120.698068892 192.168.105.51 → 192.168.103.123 DHCP 342 DHCP ACK      - Transaction ID 0xd90c71b5
    12 181.602768470 192.168.103.123 → 192.168.100.50 DHCP 325 DHCP Request  - Transaction ID 0x97391f7f
    13 181.603247659 192.168.105.51 → 192.168.103.123 DHCP 342 DHCP ACK      - Transaction ID 0x97391f7f

Why is that so? Is this a networkmanager issue? Or something else?
Is it a bug in the distrbution (mainly OpenSuSE Tumbleweed what I use)?

Any help is appreciated.

Greetings

Michael