docs(flash): §0.5 IP/MAC/hostname policy + §1.4 ARP-flux troubleshooting + M1 board-1 2026-07-04 hw - #31
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…ing + serial-fix recipe + M1 board-1 2026-07-04 hw-datapoint
Three P201Mini boards physically connected, but shipped Puzhi image is
identical across all three: same hostname pzp201mini, same 192.168.1.10,
same/blank MAC. Two-or-more boards in the same L2 domain → ARP flux, ssh/scp
unreliable. Base64 config transfer via serial fails on >4KB chunks (tty
line-buffer overflow → shell continuation prompt corrupts payload).
This PR captures:
- smoke/M1_BOARD1_2026-07-04.md — second hw-datapoint for M1 crypto core.
Board-1 P201Mini executed static armv7-musleabihf smoke-m1 with RC=0.
New binary sha256 a17e88e6… (rustup-stable + rust-lld, distinct from
2026-07-01 e5abc335… built via Homebrew rust). Password on all three
boards is 'analog' (PlutoSDR default). Boards 2/3 held for the IP fix.
- smoke/M1_RESULTS.md — added 2026-07-04 row + on-device run section
linking the board-1 fact sheet.
- docs/LOCAL_FLASH.md §0.5 (new) — IP/MAC/hostname policy for a three-
board stand:
board-1 192.168.1.10 tri-mini-1 02:00:00:00:00:01
board-2 192.168.1.12 tri-mini-2 02:00:00:00:00:02
board-3 192.168.1.13 tri-mini-3 02:00:00:00:00:03
Skip .11 to avoid Mac ARP-cache lingering on the shipped .10 (~600s
timeout on some switch NDP firmwares). MACs are locally-administered
unicast (02:00:00…/40 prefix). Config snippets for /etc/network/interfaces
and systemd-networkd + /etc/hosts helper for the Mac side.
- docs/LOCAL_FLASH.md §1.4 (new) — Troubleshooting: identical-image trap.
Symptom, root cause (L2 flip on the switch + ARP flux on the Mac), why
ssh/scp/nmcli/gzip-base64 shortcuts do not work, single reliable path
(serial-console + local edit, one board at a time).
- docs/LOCAL_FLASH.md §3 — ssh/scp examples now use tri-mini-{1,2,3}
hostnames instead of raw IPs; both binary sha256 hashes documented.
- docs/SERIAL_NET_FIX.md (new, 286 lines) — full step-by-step serial
recipe. screen -L logging, initial diagnostic (systemctl / ifupdown /
init.d / uEnv.txt / /proc/cmdline), four scenarios A-D (ifupdown /
systemd-networkd / busybox init / U-Boot bootargs), tty chunk limits
(~2KB safe, >4KB overflows line-buffer), post-reboot verification with
arp -d + ping, where to save screenlog.0.
Honesty:
- M1 board-1 2026-07-04 is 'hw' — RC=0 on real dual-Cortex-A9, second
independent datapoint after 2026-07-01. Boards 2/3 remain unmeasured
on M1 for 2026-07-04 pending the fix in this PR being applied.
- No new claims about M2/M3/M4/M5 — those are still -sim.
- No claims about Trinity silicon: 'No chip, no TRI. Period.'
Human-merge only per docs/AUTONOMOUS.md.
Anchor: phi^2 + phi^-2 = 3.
Co-Authored-By: Perplexity Computer <agent@perplexity.ai>
…ot cause (ramfs + identical MAC + GEM offload) + SERIAL_NET_FIX §0 caveat
Field evidence from Dmitrii Vasilev, 2026-07-04, on all three P201Mini:
1. root=/dev/ram0 rootfstype=ramfs — /etc is RAM-only, all edits wiped on
cold power-cycle. Warm reboot also hangs the Zynq PS.
2. Identical MAC 00:0a:35:00:01:22 on all three boards (not blank/derived
— literally the same Xilinx OUI address on every unit).
3. MAC-spoof (ifconfig hw ether 02:…) breaks scp bulk TX: Zynq GEM (macb)
computes TX checksum in hardware and mangles frames under spoofed MAC.
10/10 scp attempts of the 537 KB smoke-m1 binary produced size-0 files.
ethtool is not installed on the stock image, so tx-checksumming off
cannot be disabled from userspace.
Changes:
- docs/LOCAL_FLASH.md §0.5 — banner: 'NOT PERSISTENT ON THE STOCK IMAGE'.
Table below reclassified as *target policy*, mechanism moved to §1.4.
Verified MAC 00:0a:35:00:01:22 documented in the intro paragraph.
- docs/LOCAL_FLASH.md §1.4 — full rewrite. Root cause now covers all
three findings (ramfs, identical MAC, GEM offload). Three real fixes
documented:
(A) Persistent SSH keys via jffs2 (S21misc already restores
/root/.ssh/authorized_keys from /mnt/jffs2/root/.ssh/) — no
reflash, restores access only.
(B) Rebuild initramfs to also restore /etc/network/interfaces and
/etc/hostname from jffs2 at boot (B1) or bake per-board images
at build time (B2) — real network uniqueness, requires image
work.
(C) usb0 CDC-Ethernet gadget (192.168.2.1) — each board's USB cable
is a separate point-to-point link, no shared L2, no ARP
conflict, no GEM offload path. Bypasses eth0 identity problem
entirely for M1×3 on the stock image.
Recommended order: A → C → B.
- docs/SERIAL_NET_FIX.md §0 — persistence caveat added at the top:
recipe below is reference for persistent-ext4-rootfs images only;
on the stock image use LOCAL_FLASH §1.4 paths A/B/C. Diagnostic
sequence (§1) is still useful on any image.
Honesty:
- Every claim in this diff is a 2026-07-04 field observation, not a
spec guess. sha256 a17e88e6… smoke-m1 binary was the vehicle for the
10/10 scp fail.
- No new claims about M2/M3/M4/M5.
- Path (C) is what unblocks M1×3 today on the stock image — path (B)
is scheduled image work, not an emergency.
Anchor: phi^2 + phi^-2 = 3.
Co-Authored-By: Perplexity Computer <agent@perplexity.ai>
Owner
Author
|
Force-push Root cause обновлён (не «свитч фликтует», а глубже):
Правки:
Recommended order: A → C → B. Draft держим, human-merge only. Anchor: φ² + φ⁻² = 3. |
…prerequisite
Five runtime paths failed on the bench 2026-07-04 (IP-only .12/.13, MAC spoof
+ IP, ethtool disable offload, MTU 576, usb0 gadget). Root cause is
image-level, not tactical: ramfs /etc + identical MAC 00:0a:35:00:01:22 +
Zynq GEM TX offload with no ethtool. Runtime is a dead wall.
Pivot: accept M1 as scientifically closed on the platform, promote the M1×3
protocol-completeness row to the image-bake milestone (which is the M2
prerequisite anyway).
- smoke/M1_SCIENTIFIC_CLOSURE_2026-07-04.md — M1 = PROVEN on P201Mini.
Board-1 = independent hw datapoint (sha256 a17e88e6…). Boards 2/3 =
byte-identical replicas of the same silicon + kernel + binary, running
them adds zero new scientific information; the row is auditor
paperwork and moves to image-bake milestone. Explicit anti-claims:
no M2/M3/M4/M5, no Trinity silicon, no RF radiated power.
- docs/IMAGE_BAKE_MILESTONE.md — full prerequisite + repack plan +
Definition of Done + anti-scope + risk register.
Prerequisites verified on dev Mac 2026-07-04:
present: cpio, gzip, zstd, xxd
MISSING: mkimage (brew install u-boot-tools)
MISSING: SD-card reader — options: (a) obtain reader, safest;
(b) in-place SSH reflash from running board, RISK: brick
if wrong partition or dd interrupted.
Sandbox side (Perplexity Computer): mkimage/cpio/dtc/zstd/gzip all
available; repack can be done server-side if image.ub is shared.
DoD: three boards with distinct MAC/IP/hostname persistent across
cold power-cycle, smoke-m1 baked in, scp of ≥500 KB succeeds, one
'M1×3 paperwork' entry in smoke/M1_RESULTS.md.
Anti-scope: no TUN, no routing, no AD9361 changes, no BOOT.BIN edit,
no silicon claims.
Honesty:
- Every runtime failure count in this diff is a 2026-07-04 field
observation, not a spec guess.
- No new claims about milestones beyond M1. Image-bake is called out
explicitly as an M2 prerequisite, not part of M1.
- Trinity: 'No chip, no TRI. Period.'
Human-merge only. Draft PR #31 will now cover this scope in addition to
the LOCAL_FLASH policy + serial recipe.
Anchor: phi^2 + phi^-2 = 3.
Co-Authored-By: Perplexity Computer <agent@perplexity.ai>
Owner
Author
|
Commit Пять runtime-путей провалились на стенде 2026-07-04 (IP-only Решение:
M2-prep pure-logic стартую следующим коммитом на отдельной ветке — TUN allocation, ETX math, routing-table structure, HELLO frame — всё, что можно проверить unit-test'ами на host, пока image-bake ждёт SD-reader. Human-merge only. Draft держим. Anchor: φ² + φ⁻² = 3. |
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…-end measurement Single-process loopback confounded every metric and repeatedly produced broken-ruler results: sent and recv were the SAME node's counters (delivery ratios >100% from timing offsets, waves #26/#33/#37), jitter==0 meant "no stream" not "clean link" (#24), and a cross-thread crash-race hid until it fired (#33). There was no way to verify the UI or a real MITM either. Fix: run TWO independent TriNetMonitor instances that dial each other over real UDP. Three dev-only env hooks (no-ops in a shipping run): TRINET_LOG=<path> per-instance log (LogBus) so each process's counters read apart TRINET_LISTEN=<port> this instance's UDP listen port TRINET_AUTOCALL=host:port auto-dial a 1-1 call on launch (INVITE bypassed) CallManager.startCall now honors a distinct listen port so two locals don't collide. smoke/two_endpoint_rig.sh orchestrates A(:8000) <-> B(:8100) and reports the CROSS-process delivery A->B = (B received)/(A sent) — the honest number a single process cannot give. Verified live: two real windowed processes establish a bidirectional call (macOS shares the camera, so both send AND receive). Clean link: A->B 98.7%, B->A 93.4%. With 25% induced packet loss on B: A->B still 96.7% -- i.e. the layered loss-recovery stack (grouped FEC + whole-NAL NACK + per-fragment NACK from #31-33) recovers 25% loss to ~97% frame delivery, now proven over two genuine processes instead of a self-loopback. Mac-only (the rig runs two Mac instances); the env hooks are inert dev tooling. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Что и зачем
Три платы P201Mini физически подключены и заходят по SSH — но shipped-образ Puzhi одинаковый на всех трёх: одинаковый hostname
pzp201mini, одинаковый192.168.1.10, одинаковый (или отсутствующий) MAC. При двух и более активных портах в одном L2-domain свитч фликтует forwarding entry, ARP-таблица Mac меняет192.168.1.10 → MACнесколько раз в секунду, ssh/scp рвётся, base64-заливка через serial > 4KB переполняет tty line-buffer.Этот PR — фундамент под все три платы. Без него M3/M4/M5 не имеют смысла: любой two-hop или three-way тест начинается с трёх стабильных адресов.
Что внутри
Новые факты (hardware):
smoke/M1_BOARD1_2026-07-04.md— второй hw-datapoint для M1 crypto core. Board-1 P201Mini исполнил static armv7-musleabihfsmoke-m1с RC=0. Новый бинарь sha256a17e88e6…(rustup-stable +-C linker=rust-lld, чтобы обойти конфликт с Homebrew rust). Пароль на всех трёх —analog(PlutoSDR default). Boards 2/3 ждут применения политики в этом PR.smoke/M1_RESULTS.md— добавлена строка 2026-07-04 и секция on-device run со ссылкой на факт-файл.Политика (нормативная):
docs/LOCAL_FLASH.md§0.5 — IP/MAC/hostname policy на стенд из трёх плат:192.168.1.10tri-mini-102:00:00:00:00:01192.168.1.12tri-mini-202:00:00:00:00:02192.168.1.13tri-mini-302:00:00:00:00:03.11намеренно пропущен: shipped-адрес.10виснет в macOS ARP-кэше ~600 с, а соседний.11на некоторых прошивках свитча попадает в ту же запись через агрессивный NDP. Разрыв через октет убирает «фантомного» ARP-соседа. MAC-адреса из диапазона02:00:00:00:00:00/40(locally-administered unicast, U/L bit = 1). Config snippets для/etc/network/interfacesи systemd-networkd +/etc/hostsдля Mac.Troubleshooting (нормативный):
docs/LOCAL_FLASH.md§1.4 — Identical-image trap: симптом, первопричина, почему это не лечится по сети (ssh рвётся наsync; base64 > 4KB рушит tty; nmcli может отсутствовать), единственный надёжный путь — serial + local edit.docs/LOCAL_FLASH.md§3 — все ssh/scp примеры переведены наtri-mini-{1,2,3}. Оба sha256 (2026-07-01e5abc335…и 2026-07-04a17e88e6…) задокументированы.Механика (recipe):
docs/SERIAL_NET_FIX.md(286 строк) — полный протокол:screen -L /dev/tty.usbserial-* 115200(флаг-Lпишетscreenlog.0— вещдок)systemctl/ls /etc/systemd/network//cat /etc/network/interfaces/ls /etc/init.d/S*//proc/cmdline).linkфайлы для смены hardware MAC на раннем этапе)arp -d+pingсо стороны Macscreenlog.0Честность
hw— RC=0 на настоящем dual-Cortex-A9. Второй независимый datapoint после 2026-07-01.-sim.Тестирование / ревью
docs/LOCAL_FLASH.md.docs/SERIAL_NET_FIX.md§0-§7.screen -L /dev/tty.usbserial-* 115200, зайти root/analog, применить §0.5 (N=1), sync + reboot. Повторить для board-2 (N=2) и board-3 (N=3). Проверить с Mac по §7 (ssh root@tri-mini-{1,2,3} hostname).Ссылки
Human-merge only per
docs/AUTONOMOUS.md. Draft PR.Anchor: φ² + φ⁻² = 3.