This object indicates if there is an active SVI
associated with this VLAN.
'true' indicates that there is an active SVI associated
with this VLAN. and SGACL is enforced for both Layer 2 and
Layer 3 switched packets within that VLAN.
'false' indicates that there is no active SVI associated
with this VLAN, and SGACL is only enforced for Layer 2
switched packets within that VLAN.