The LTE Modem Gave Every IPv6 Prefix an Infinite Lifetime
Repeated malformed router advertisements filled an LTE interface with permanent SLAAC addresses until the current routed prefix no longer had a reliable source.
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VyOS
The Probe Timed Out After It Had Already Succeeded
A three-second wrapper killed partially successful ICMP probes, and the failover supervisor converted exit 124 into a false LTE outage.
Continue readingWhat the Preview Token Actually Approves
A useful approval token has to bind the intended change, not the temporary directory which happened to render it.
Continue readingThe State File Was Right. The Route Was Wrong.
The failover supervisor remembered the right state while the live routing tables had quietly stopped agreeing with it.
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When the WAN Failover Script Tripped Over Its Own Lock
This morning r3 in Leipzig started producing the sort of alert storm which makes a dual-WAN setup look much less reassuring than it did on the diagram. Both WANs appeared to flap. The local platform behind the router …
Continue readingMoving the KNET Queue Onto the Router
A traffic policy cannot protect latency if the real queue has already formed in a modem or provider network.
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