Returned from being elsewhere to find traffic had dropped.
root@router:~# date ; logread -e udhcpc
Wed Jun 25 17:27:02 EDT 2025
Wed Jun 25 16:03:58 2025 daemon.notice netifd: wan (2786): udhcpc: sending renew to server 173.79.139.1
Wed Jun 25 16:03:58 2025 daemon.notice netifd: wan (2786): udhcpc: lease of 173.79.139.33 obtained from 173.79.139.1, lease time 7200
Wed Jun 25 17:03:58 2025 daemon.notice netifd: wan (2786): udhcpc: sending renew to server 173.79.139.1
and another a few hours later, just before I posted this.
root@router:~# date ; logread -e udhcpc
Wed Jun 25 19:41:28 EDT 2025
Wed Jun 25 15:37:25 2025 daemon.notice netifd: wan (2790): udhcpc: started, v1.36.1
Wed Jun 25 15:37:27 2025 daemon.notice netifd: wan (2790): udhcpc: broadcasting discover
Wed Jun 25 15:37:27 2025 daemon.notice netifd: wan (2790): udhcpc: broadcasting select for 173.79.139.33, server 173.79.139.1
Wed Jun 25 15:37:27 2025 daemon.notice netifd: wan (2790): udhcpc: lease of 173.79.139.33 obtained from 173.79.139.1, lease time 7200
Those timestamps make no sense to me.
root@router:~# uptime
19:44:13 up 4 min, load average: 0.05, 0.31, 0.16
I did not reboot four minutes ago, but WAN access has returned - consistent with a reboot.
Now I think I understand that those log entries were for the then-current lease, probably replayed after the reboot.