||Reasonably common circumstances cause the entire system to fail, or a major subsystem to stop working, or other devices on the network to be disrupted. No workarounds exist.
||Important functions are unusable and workarounds do not exist. Other functions and the rest of the network is operating normally.
||Failures occur in unusual circumstances, or minor features do not work at all, or other failures occur but low-impact workarounds exist.
This is the highest level for documentation bugs.
||Failures occur under very unusual circumstances, but operation essentially recovers without intervention. Users do not need to install any workarounds and performance impact is tolerable.
||Defects do not cause any detrimental effect on system functionality.
||Requests for new functionality or feature improvements.