OK - I have the zombie cyan flash mode in captivity.
Using ACLs on an ethernet switch, I am able to isolate an photon from the internet on demand - it stays connected to the access point, but the ACL drops all ethernet packets between the photon and the internet. I can turn this on and off on demand via a couple of expect scripts.
When I isolate the photon, the behaviour exactly mirrors the observed behaviour during a “normal” internet outage. The packet captures look exactly the same too (in this case, I installed the ACLs after packet 42):
Removing the ACLs and allowing traffic to pass again does nothing for the photon, it continues to flash cyan and does not ever retry opening the cloud connection. As soon as I hit reset, it takes right off.
Note that I’ve not been able to duplicate the SOS failure yet, but once I’ve run this one to ground, I’ll look at the test case listed in #490.