This object indicates the traffic filter type applied
at this interface.
'disable' indicates that Source Guard feature is disabled.
'ip' indicates that Source Guard feature is enabled and
only applied to IP traffic.
'ipMac' indicates that Source Guard feature is enabled and
applied to both IP and MAC traffic.
'strictIpMac' indicates that Source Guard feature is
enabled and applied to IP traffic. IP traffic originating
from a DHCP client will subject to validation of
client IP address, MAC address, VLAN and interface where
the DHCP client is connected.