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Enabling STP on a bridge whose management rides an in-band VLAN can cut
off that very management - and not only by our own blocking: on this
network the upstream TP-Link Easy Smart switch's "loop prevention"
reacted to our BPDU hellos by blocking ITS port towards us while our
ASIC was all-forwarding, isolating the whole segment until a power
cycle. Recoverable only by going quiet.
Add a commit-confirm watchdog: while STP is enabled, any HTTP request
re-arms a countdown ("stp failsafe <seconds>", default 180, 0 disables);
if management stays silent for the whole window, STP disables itself,
which also stops BPDU TX so a neighbour's loop protection can release
its block. The web UI polls /stp.json every 2 s, so an open browser
naturally keeps the watchdog re-armed. The trip is reported via
/stp.json (fs, fsT) and as a warning on the Spanning Tree page.
Deliberately not conditioned on our own MSTP port states - the incident
above proves the uplink can be dead while every local port forwards.
Also bound the NIC DMA busy-waits (nic_tx_packet, nic_rx_header,
nic_rx_packet): an unbounded spin on SFR_NIC_CTRL freezes the entire
main loop (timers, HTTP, ARP) if the ASIC ever fails to consume a
transfer; give up after ~65k polls and drop the frame instead.
Hardware-verified end to end: with priority 15 against a live RSTP
bridge the uplink died 6 s after "stp on" and the network recovered BY
ITSELF 66 s later (trip at 45 s + neighbour release), fsT=1, LACP and
LAN intact. Telemetry via syslog-to-edge-port host confirmed the full
chain: countdown 44->4, trip, hello TX stopping at the trip.
(cherry picked from commit 1fa9775156fd6d7ebfdda2382f73430b86601230)
43 lines
2.0 KiB
HTML
43 lines
2.0 KiB
HTML
<!DOCTYPE html>
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<html>
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<script src="/main.js"></script>
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<script src="/i18n.js"></script>
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<link rel="stylesheet" href="style.css">
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<title>FreeSwitchOS Spanning Tree</title>
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</head>
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<body>
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<nav id="sidebar"></nav>
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<div style="margin-left:16%;padding:1px 16px;height:1000px;">
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<div id="ports"></div>
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<h1>Spanning Tree (RSTP)</h1>
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<h2>Mode: <select id="stpMode"><option value="off">Disabled</option><option value="on">Enabled</option></select>
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<input style="width:15%;margin-left: 3em;" class="action" id="stp_sub" onclick="stpSub();" type="button" value="Apply"></h2>
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<div id="stpStat" style="font-family:monospace;"></div>
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<h2>Bridge settings</h2>
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<table id="stpBridge">
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<tr>
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<th>Priority</th><th>Version</th><th>Hello [s]</th><th>Max age [s]</th><th>Fwd delay [s]</th><th>Tx hold</th><th>Mgmt failsafe [s]</th>
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</tr>
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<tr>
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<td><select id="bPrio"></select></td>
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<td><select id="bVer"><option value="rstp">RSTP</option><option value="stp">STP compat</option></select></td>
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<td><input id="bHello" type="number" min="1" max="10" style="width:4em"></td>
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<td><input id="bMaxage" type="number" min="6" max="40" style="width:4em"></td>
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<td><input id="bFwd" type="number" min="4" max="30" style="width:4em"></td>
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<td><input id="bTxhold" type="number" min="1" max="10" style="width:4em"></td>
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<td><input id="bFailsafe" type="number" min="0" max="255" style="width:4em" title="Auto-disable STP if ports stay blocked while management is silent; 0 = off"></td>
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</tr>
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</table>
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<p style="font-size:small">Changes apply immediately. Edge ports skip the listen period; guard/filter act on received BPDUs.</p>
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<h2>Ports</h2>
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<table id="stpPortsTbl">
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<tr>
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<th>Port</th><th>State</th><th>Role</th><th>STP</th><th>Edge</th><th>Cost [k]</th><th>Priority</th><th>Guard</th><th>Filter</th>
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</tr>
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</table>
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<script src="/stp.js"></script>
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</div>
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</body>
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<script src="/navigation.js"></script>
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</html>
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