hh3cSecureNeedToKnowMode 1.3.6.1.4.1.25506.2.26.1.2.1.1.2

Attribute to determine which frames are to be forwarded to this port intact. 1 - Need To Know is not available. 2 - All frames. 3 - Frames addressed to the authorised devices only. 4 - Frames addressed to the authorised devices, plus all broadcast frames. 5 - Frames addressed to the authorised devices, plus all broadcast and multicast frames. 6 - As 3 and cannot be changed. 7 - As 4 and cannot be changed. 8 - As 5 and cannot be changed. If this object returns 1,6,7 or 8, it means that the Need To Know configuration cannot be changed, and any attempt to write to this object will cause an error.