Odhcp[1887] warning

Installing and Using OpenWrt
1

Today I got a new modem from my ISP (same as I had). I used the opportunity to also flash the newest snapshot (31360) on the router (mt6000).

Now there are some log entries I’ve never seen before:

Wed Oct 8 17:36:49 2025 daemon.warn odhcpd[1887]: rfc9096: br-lan: renew xxxx:yyyy:889:ec00::/64
Wed Oct 8 17:36:49 2025 daemon.warn odhcpd[1887]: rfc9096: br-lan: renew zzzz:aaaa:560c::/64
Wed Oct 8 17:36:49 2025 daemon.warn odhcpd[1887]: rfc9096: br-lan: stale zzzz:aaaa:560c::/64
Wed Oct 8 17:36:49 2025 daemon.warn odhcpd[1887]: rfc9096: br-lan: stale xxxx:yyyy:889:ec00::/64
Wed Oct 8 17:36:49 2025 daemon.warn odhcpd[1887]: rfc9096: br-lan: piofile updated

Both the ipv6 addresses are from br-lan interface. The warning appears every few minutes (1-5) or so.

Is this a misconfiguration on my part or some snapshot thing which will disappear in a next version?

2

Typically you run one dhcp and one dhcp6/ra server per subnet, or multiple of same type coordintating. This looks like openwrt and provider router are fighting the 2nd battle.

3

Its a modem (bridged). It has no router functions.

4

Read it, client releases “private” temporary ip6 address,

5

odhcpd is seeing a lot of updates in main snapshots lately, after being stagnant for a long time.

1 Like
6

Ah, then this is probably the reason: