This object indicates the Source Guard filter mode at this interface. active(1) indicates that the Source Guard feature is active at this interface. inactiveTrustPort(2) indicates that the Source Guard feature is inactive because this interface is a DHCP Snooping trust interface and all IP traffic is permitted. In this case, dIpsgIfSrcGuardIpFilterAction is 'permitAllIpAdress'. inactiveNoSnoopingVlan(3) indicates that the Source Guard feature is inactive because this interface does not have a VLAN which has DHCP Snooping enabled and no IP source verify entry is active. In this case, all IP traffic is denied and dIpsgIfSrcGuardIpFilterAction is 'denyAllIpAddress'. If this object is not 'active', the entry is a special entry: traffic from any VLANs on the interface has the same behavior indicated by dIpsgIfSrcGuardIpFilterAction and both dIpsgIfSrcGuardVlansFirst2K and dIpsgIfSrcGuardVlansSecond2K are empty.