Technical Tip: Null error when registering from Hosts view

This article describes issues with registration when the Unregistered Hosts Days Valid field is blank in the global Aging Settings.

Symptoms:

• Null error when registering a rogue from the Hosts view 
• Device matches Device Profiling Rule but does not fully register
  • Host record shows the role specified in rule
  • Host record still a rogue 

To view Aging Settings:

Version 8.x: System -> Settings -> User/Host Management -> Aging.

Version 9.x: Users & Hosts -> Settings -> Aging.

Example:
Unregistered Hosts:
Days Valid: <blank>   <--
Days Inactive: 7

Workaround:

1) Configure a Days Valid value.

Example:
Unregistered Hosts:
Days Valid: 30 <--
Days Inactive: 60

2) Select 'Save Settings' to apply.

Hosts can now be registered. 

If using Device Profiling rules, delete affected rogue records and run L2 poll to quickly rediscover devices.

Solution:  To be fixed in an upcoming release.