[Kea-users] DHCPv6 flooding by Windows 11 24H2 clients

Sat Jan 25 10:32:30 UTC 2025

Hello,

I read this article:

https://www.zdnet.com/article/windows-11-24h2-bug-list-updated-one-fixed-12-to-go/

In section 6 there are mentioned some major problems in networking and obtaining IP addresses. I suspect this could be related to your problem. After reading the article I was afraid to do the upgrade so I do not have any 24H2 update until now, so I am not able to confirm the behavior. I any of the machines in the network gets the update I will check for you to confirm.

Anyway this has nothing to do with kea.

Marek

Sent with Proton Mail secure email.

On Friday, January 24th, 2025 at 23:04, rme at bluemail.ch <rme at bluemail.ch> wrote:

> Hi Darren,
> 
> Thank you so much for your response.
> 
> It's always good to think outside the box. I am having issues with v6
> but the linked v4 documentation is also applicable for v6. Disabling
> DDNS update on renew helps taking the load from the DNS server.
> 
> However enabling lease-caching just changes the output of the
> log-flooding lines slightly. It might take off some load from the DHCP
> server though.
> 
> Not sure if I am the only one who ever noticed this issue with Windows
> 11 24H2 yet or if I am the only one facing it. But it's reproducible for
> me on multiple different networks and always Windows 11 24H2 causing
> this issue. No matter if it's a PC, Laptop, upgraded or freshly installed.
> 
> 
> Logs I am getting now:
> 
> Jan 24 22:58:09 master kea-dhcp6[17139]: INFO
> [kea-dhcp6.leases.140017378789056] DHCP6_LEASE_REUSE
> duid=[00:01:00:01:2e:a1:6e:10:d0:ad:08:30:3f:97], tid=0x6f6749: lease
> for address fddb:9f42:7afb:1::27 and iaid=181447944 has been reused for
> 2591983 seconds
> Jan 24 22:58:10 master kea-dhcp6[17139]: INFO
> [kea-dhcp6.leases.140017336846016] DHCP6_LEASE_REUSE
> duid=[00:01:00:01:2e:a1:6e:10:d0:ad:08:30:3f:97], tid=0x53abc8: lease
> for address fddb:9f42:7afb:1::27 and iaid=181447944 has been reused for
> 2591982 seconds
> Jan 24 22:58:10 master kea-dhcp6[17139]: INFO
> [kea-dhcp6.leases.140017315874496] DHCP6_LEASE_REUSE
> duid=[00:01:00:01:2e:a1:6e:10:d0:ad:08:30:3f:97], tid=0x88d499: lease
> for address fddb:9f42:7afb:1::27 and iaid=181447944 has been reused for
> 2591982 seconds
> Jan 24 22:58:11 master kea-dhcp6[17139]: INFO
> [kea-dhcp6.leases.140017273931456] DHCP6_LEASE_REUSE
> duid=[00:01:00:01:2e:a1:6e:10:d0:ad:08:30:3f:97], tid=0x11ee76: lease
> for address fddb:9f42:7afb:1::27 and iaid=181447944 has been reused for
> 2591981 seconds
> Jan 24 22:58:11 master kea-dhcp6[17139]: INFO
> [kea-dhcp6.leases.140017252959936] DHCP6_LEASE_REUSE
> duid=[00:01:00:01:2e:a1:6e:10:d0:ad:08:30:3f:97], tid=0x5bfe23: lease
> for address fddb:9f42:7afb:1::27 and iaid=181447944 has been reused for
> 2591981 seconds
> Jan 24 22:58:12 master kea-dhcp6[17139]: INFO
> [kea-dhcp6.leases.140017221502656] DHCP6_LEASE_REUSE
> duid=[00:01:00:01:2e:a1:6e:10:d0:ad:08:30:3f:97], tid=0x57836e: lease
> for address fddb:9f42:7afb:1::27 and iaid=181447944 has been reused for
> 2591980 seconds
> Jan 24 22:58:12 master kea-dhcp6[17139]: INFO
> [kea-dhcp6.leases.140017190045376] DHCP6_LEASE_REUSE
> duid=[00:01:00:01:2e:a1:6e:10:d0:ad:08:30:3f:97], tid=0xef19dd: lease
> for address fddb:9f42:7afb:1::27 and iaid=181447944 has been reused for
> 2591980 seconds
> Jan 24 22:58:13 master kea-dhcp6[17139]: INFO
> [kea-dhcp6.leases.140017504618176] DHCP6_LEASE_REUSE
> duid=[00:01:00:01:2e:a1:6e:10:d0:ad:08:30:3f:97], tid=0x43eeb5: lease
> for address fddb:9f42:7afb:1::27 and iaid=181447944 has been reused for
> 2591979 seconds
> Jan 24 22:58:13 master kea-dhcp6[17139]: INFO
> [kea-dhcp6.leases.140017431217856] DHCP6_LEASE_REUSE
> duid=[00:01:00:01:2e:a1:6e:10:d0:ad:08:30:3f:97], tid=0xac849a: lease
> for address fddb:9f42:7afb:1::27 and iaid=181447944 has been reused for
> 2591979 seconds
> Jan 24 22:58:14 master kea-dhcp6[17139]: INFO
> [kea-dhcp6.leases.140017399760576] DHCP6_LEASE_REUSE
> duid=[00:01:00:01:2e:a1:6e:10:d0:ad:08:30:3f:97], tid=0xc64e3e: lease
> for address fddb:9f42:7afb:1::27 and iaid=181447944 has been reused for
> 2591978 seconds
> Jan 24 22:58:14 master kea-dhcp6[17139]: INFO
> [kea-dhcp6.leases.140017410246336] DHCP6_LEASE_REUSE
> duid=[00:01:00:01:2e:a1:6e:10:d0:ad:08:30:3f:97], tid=0x2326ec: lease
> for address fddb:9f42:7afb:1::27 and iaid=181447944 has been reused for
> 2591978 seconds
> Jan 24 22:58:15 master kea-dhcp6[17139]: INFO
> [kea-dhcp6.leases.140017378789056] DHCP6_LEASE_REUSE
> duid=[00:01:00:01:2e:a1:6e:10:d0:ad:08:30:3f:97], tid=0x5f5ed7: lease
> for address fddb:9f42:7afb:1::27 and iaid=181447944 has been reused for
> 2591977 seconds
> Jan 24 22:58:15 master kea-dhcp6[17139]: INFO
> [kea-dhcp6.leases.140017336846016] DHCP6_LEASE_REUSE
> duid=[00:01:00:01:2e:a1:6e:10:d0:ad:08:30:3f:97], tid=0xff349: lease for
> address fddb:9f42:7afb:1::27 and iaid=181447944 has been reused for
> 2591977 seconds
> Jan 24 22:58:16 master kea-dhcp6[17139]: INFO
> [kea-dhcp6.leases.140017315874496] DHCP6_LEASE_REUSE
> duid=[00:01:00:01:2e:a1:6e:10:d0:ad:08:30:3f:97], tid=0xff3db1: lease
> for address fddb:9f42:7afb:1::27 and iaid=181447944 has been reused for
> 2591976 seconds
> Jan 24 22:58:16 master kea-dhcp6[17139]: INFO
> [kea-dhcp6.leases.140017263445696] DHCP6_LEASE_REUSE
> duid=[00:01:00:01:2e:a1:6e:10:d0:ad:08:30:3f:97], tid=0x80f84d: lease
> for address fddb:9f42:7afb:1::27 and iaid=181447944 has been reused for
> 2591976 seconds
> Jan 24 22:58:17 master kea-dhcp6[17139]: INFO
> [kea-dhcp6.leases.140017231988416] DHCP6_LEASE_REUSE
> duid=[00:01:00:01:2e:a1:6e:10:d0:ad:08:30:3f:97], tid=0xf63728: lease
> for address fddb:9f42:7afb:1::27 and iaid=181447944 has been reused for
> 2591975 seconds
> Jan 24 22:58:18 master kea-dhcp6[17139]: INFO
> [kea-dhcp6.leases.140017200531136] DHCP6_LEASE_REUSE
> duid=[00:01:00:01:2e:a1:6e:10:d0:ad:08:30:3f:97], tid=0x9c1f5f: lease
> for address fddb:9f42:7afb:1::27 and iaid=181447944 has been reused for
> 2591974 seconds
> Jan 24 22:58:18 master kea-dhcp6[17139]: INFO
> [kea-dhcp6.leases.140017494132416] DHCP6_LEASE_REUSE
> duid=[00:01:00:01:2e:a1:6e:10:d0:ad:08:30:3f:97], tid=0xf5e796: lease
> for address fddb:9f42:7afb:1::27 and iaid=181447944 has been reused for
> 2591974 seconds
> ...
> 
> Thanks again for your assistance.
> I am going to apply cache and disable ddns-update-on-renew everywhere
> until it's solved.
> 
> best regards,
> Rainer
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