The standard VM-50, while the smallest model of the
VM-Series, requires more resources than are available in some environments.
The VM-50 Lite mode provides an alternative for environments where
hardware resources are constrained. The VM-50 Lite requires 4GB
of memory instead of the 4.5GB required by the standard VM-50. The
VM-50 Lite uses the same license as the standard VM-50 but comes
up in Lite mode when allocated 4GB of RAM.
In high availability deployments, both VM-Series firewalls
must both be licensed as a VM-50 Lite to avoid capacity mismatch
issues. In the case of a capacity license mismatch, the VM-50 (non-Lite)
is considered to have a higher capacity; the VM-50 becomes non-functional
while the VM-50 Lite remains functional.