On 01/05/18 21:30, Stuart Longland wrote: > No corresponding log messages from the switch. > > In any case, I've asked PC Engines about the voltage range of the APU2, > having priced one for under the AU$600 mark.
Right, so a further update… I observed the errors came in bursts, sometimes at particular times of the day. During these times, nothing else has connectivity issues, just the border router. I wondered if it might be bursts of network activity on the main switch. The 240-12V 1.35A switchmode PSU in it was replaced with a Micrel MIC29750 LDO which is set to regulate to 11.8V (within 3%), and is capable of supplying 7.5A. The mainboard of the Linksys LGS326AU features two switchmode PSUs that regulate to 3.3V and 5V, everything in the switch runs off those two power rails. On paper, that *should* work fine, and for everything else, it does. Just this border router misbehaves with it. As an experiment, I grabbed an old 10/100Mbps switch, hooked the main switch and rl0 on the border router up to it. I also hooked up a TS-7670 to that same 10/100 switch. If it's the main switch, I shouldn't be able to ping either machine. About 45 minutes later, I got a burst of errors from my cron job. Pinging the border router yielded no reply, but I could still ping the TS-7670. I think that confirms hardware. Disappointingly, I've not heard from PC Engines regarding the APU2 and its power supply tolerance, but I've placed an order with Yawarra Computers anyway, as it *looks* as if all the expensive bits that touch 12V can take 24V+. If a 12V capacitor blows, well I have the schematics and a soldering iron to replace that part. Plus, the old border router is still there even if not the most reliable. When that arrives, I can look at getting OpenBSD 6.3 onto that, and migrating my old config across. -- Stuart Longland (aka Redhatter, VK4MSL) I haven't lost my mind... ...it's backed up on a tape somewhere.
