mscAtmIfVpcVpdTmRxPacketWiseDiscard 1.3.6.1.4.1.562.36.2.1.114.4.2.2.100.1.78

This attribute specifies whether packet-wise discard functions are to be enabled or disabled in the receive data direction for this connection. Packet-wise discard functions should only be requested if this connection is transferring AAL5 frame traffic. This attribute is not applicable for Vpts. Packet-wise functions increase the 'goodput' of the link. The receive packet-wise function is Partial Packet Discard (PPD). PPD allows the connection to discard the remainder of a cell- forwarded AAL5 frame if one cell of this frame has been discarded, for example due to UPC. All cells are discarded up to but not including the EOM cell. The PPD function increases the 'goodput' of the link, since cells which are only going to be discarded at the AAL5 reassembly point are not transmitted. PPD is available at all VCC connection points where UPC may be activated. PPD is not applicable for Vpcs. On CQC-based ATM FPs, packet-wise discards should only be enabled for connections carrying AAL5 segmentation traffic. Setting the value to enabled for any other traffic type may result in traffic being discarded. On CQC-based ATM cards, at a permanent VCC connection endpoint, this attribute is not applicable and is ignored. If AAL5 segmentation and reassembly has been requested, PPD and Early Packet Discard (EPD) are automatically enabled. On ATM IP cards, this attribute may safely be set to enabled for any connection (Vcc or Vpc) since they have the ability to automatically detect AAL5-segmented traffic on a connection, and only enables packet-wise discards if AAL5-segmented traffic is detected. When this attribute is set to enabled, packet-wise discard functions are applied to receive traffic at this connection point. When this attribute is set to disabled, packet-wise discard functions are not applied to receive traffic at this connection point. At a SPVC origin on a PNNI interface, a value of enabled specifies that frame discard is requested in the forward direction. When this attribute is set to disabled, forward frame discard is not requested in the SPVC call setup. The receive packet-wise discard functions that are active are visible in the Vcc/Vpc Tm rxPacketWiseDiscard operational attribute.