This accessible-for-notify INTEGER carries the VLAN ID of the port involved in an hh3csupplicantproxycheck trap, one of the notification's bound variables (the source description is a placeholder single-character string, so this is inferred from its role and object name). It tells the receiving management station which VLAN the flagged supplicant or proxy condition was detected on. For example, a trap firing on VLAN 100 would carry the value 100 in this object.