For a port running spanning tree, this object represents the administrative point-to-point status of the LAN segment attached to this port, using the enumeration values of IEEE Std 802.1AC. A value of forceTrue(1) indicates that this port should always be treated as if it is connected to a point-to-point link. A value of forceFalse(2) indicates that this port should be treated as having a shared media connection. A value of auto(3) indicates that this port is considered to have a point-to-point link if it is an Aggregator and all of its members are aggregatable, or if the MAC entity is configured for full duplex operation, either through auto-negotiation or by management means. Manipulating this object changes the underlying adminPointToPointMAC.

For a VIP, the adminPointToPointMAC parameter controls the mechanism by which the Default Backbone Destination parameter for the VIP is determined. For a backbone service instance that includes only 2 VIPs, the value may be set to forceTrue(1) which permits dynamic learning of the Default Backbone Destination parameter. For a backbone service instance that includes more than 2 VIPs, the value MUST be set to ForceFalse(2) or auto(3).

When this object is set to forceTrue(1) for a VIP, the Default Backbone Destination parameter is modified by the subsequent M_UNITDATA.indications as specified in 6.10.1 (and described in 26.4.1). Whenever the parameter is set to forceFalse(2) or auto(3), the value for the Default Backbone Destination parameter is set to the Backbone Service Instance Group Address for the VIP-ISID.

The value of this object MUST be retained across reinitializations of the management system.