Persistent DA after device unavailable

To add onto this. "Availability" is not as much a check of whether the device is online and working as much as it is a tool that SL1 itself uses to determine whether or not to attempt to collections. 

You mentioned ICMP Ping, but component availability does not use this and you can turn off the availability check for components, which will allow DA execution to still happen. We have started to shift to delivering some PowerPacks without the availability check for components because sometimes it makes sense to continue collection even if the check fails. 

You can configure a device to just not flip to "unavailable" if you want DA collection to continue attempts. This should be done with caution as if the device truly is unreachable from the SL1 collector, then letting Dynamic Applications run against it will waste collector resources, especially if they have a long timeout.