AMT had no IP because Linux had enp88s0 admin-down (it left vmbr0 on 09-25 and
had no auto stanza); igc powers off the I226-LM PHY when down, so AMT had no
link. With the port up (no IP, unbridged) AMT took a lease within minutes.
- nh3-pve: `auto enp88s0` (manual, unbridged) and sysctl.d disable_ipv6 on it;
backup /root/interfaces.bak-20260925-amt; runtime already matched, no reload.
- UDM: reservation nh3-pve-amt -> 10.100.0.151 (untagged nh3-default; the
cable is on an nh3-sw1 trunk, not the UDM).
- DNS nh3-pve-amt.nh3.internal. AMT 16.1.25 answers TLS :16993 and :664.
vh
0f032fac2c