mscAtmIfVccVcdFwdFrameDiscard 1.3.6.1.4.1.562.36.2.1.114.5.2.110.1.76

This attribute specifies the activation of frame discard functionality in the forward data direction, at relay points, for this connection. It applies to each hop of the connection. Frame discard functions should not be requested if this connection is not transferring frame (AAL5) traffic. Setting the value to indicated for any other traffic type results in all traffic being discarded. If this connection point is a permanent (provisioned) VCC mid- point, this attribute specifies whether the Partial Packet Discard (PPD) function is to be enabled or disabled in the transmit direction at this connecting point. The PPD function allows the connecting point to discard the remainder of a cell-forwarded AAL5 frame if one cell of this frame has been discarded. The PPD function increases the 'goodput' of the link, since cells which are only going to be discarded by the AAL5 reassembly are not transmitted. At a permanent VCC connecting point which is not a connection endpoint, when this attribute is set to indicated, the PPD function is applied to transmit traffic at this connecting point. It should not be indicated for connections whose end points are not performing AAL5 segmentation and reassembly. When this attribute is set to notIndicated, the PPD feature is not applied to transmit traffic at this connecting point. At a SPVC origin on a PNNI interface, a value of indicated specifies that frame discard is requested in the forward direction. The frame discard function for SPVCs consists of PPD at the SPVC origin and at all intermediate connecting points. When this attribute is set to notIndicated, forward frame discard is not requested in the SPVC call setup. Thus PPD is not enabled at the SPVC origin nor at any intermediate connecting point. At all points along a VPC, this setting is ignored. At a permanent VCC connection endpoint, this value is ignored. If AAL5 segmentation and reassembly has been requested, PPD and Early Packet Discard (EPD) are automatically enabled. This attribute has been migrated to txFrameDiscard.