Looks like our L3+ had an error and shut down overnight...  I updated the firmware, switched it to a new wireless access point, changed the network cable, and it appears to be operating again.  Hopefully this isn't an ongoing issue.  I'll try to keep my eye on it.

EDIT: My wireless network seems to be going a bit crazy.  After a couple hours of troubleshooting I think I've got it all playing nicely now.  Keeping my fingers crossed.  I have way too many wifi devices...