atmIfVptVccTmAbrConnectionType 1.3.6.1.4.1.562.2.4.1.114.9.20.7.100.1.110

This attribute indicates the type of ABR behavior which is in effect at this connection. This attribute is only applicable if the atmServiceCategory attribute is availableBitRate. If the atmServiceCategory attribute is not availableBitRate, or if the connection is not active, this attribute value is displayed as notApplicable. For CQC-based ATM cards, the only possible values are notApplicable, efciSwitch or nonAbrInterworking. In EFCI marking mode, the Explicit Forward Congestion Indication (EFCI) field in the data cell headers is used to indicate transmit queue congestion. For ATM IP cards, if the connectionPointType is displayed as connectionEndPoint, this attribute has the value sourceDest. In this mode, the ABR Source and Destination behavior is in effect at this connection. This attribute is also sourceDest in the case where the next hop connection is specified as nonAbrInterworking. The next hop connection is the Vcc or Vpc identified by the nextHop attribute of the Nrp or Rp component. If the connectionPointType is not connectionEndPoint, the value of this attribute depends upon the abrConnectionType provisioning and the card type to which the traffic is forwarded on the backplane. The default abrConnectionType is provisioned at the CA Abr abrConnectionType attribute, and may be overridden for a provisioned connection in the Vcd Tm abrConnectionType or Vpd Tm abrConnectionType attribute. If the CA Abr abrConnectionType attribute is virtualSourceDest at either one of the two connection points, and if both the connection points are defined on ATM IP cards, virtual source and destination behavior is applied to the connection. In this instance, the attribute displays the value virtualSourceDest. This attribute has the value erSwitch if ABR explicit rate functionality is in effect at this connection. In this mode, the switch may modify the Explicit Rate (ER) field of backward Resource Management (RM) cells to indicate the status of congestion at this connection point. This attribute has the value nonAbrInterworking in the case where this connection point is functioning as an SPVC origin for an ABR connection where the link side of this connection is configured as a non-ABR ATM service category. This means that there are no RM cells on the link side of this connection, and that the next hop connection point is performing as an ABR sourceDest.