atmx Vpl Entry

1.3.6.1.4.1.800.2.9.1.1.1.1

An entry in the VPL table. This entry is used to model a bi-directional VPL. To create a VPL at an ATM interface, either of the following procedures are used: Negotiated VPL establishment (1) The management application creates a VPL entry in the atmxVplTable by setting atmxVplRowStatus to createAndWait(5). This may fail for the following reasons: - The selected VPI value is unavailable, - The selected VPI value is in use. Otherwise, the agent creates a row and reserves the VPI value on that port. (2) The manager selects an existing row(s) in the atmxTrafficDescrParamTable, thereby, selecting a set of self-consistent ATM traffic parameters and the QoS Class for receive and transmit directions of the VPL. (2a) If no suitable row(s) in the atmxTrafficDescrParamTable exists, the manager must create a new row(s) in that table. (2b) The manager characterizes the VPL's traffic parameters through setting the atmxVplReceiveTrafficDescrIndex and the atmxVplTransmitTrafficDescrIndex values in the VPL table, which point to the rows containing desired ATM traffic parameter values in the atmxTrafficDescrParamTable. The agent will check the availability of resources and may refuse the request. (3) The manager activates the VPL by setting the the atmxVplRowStatus to active(1). If this set is successful, the agent has reserved the resources to satisfy the requested traffic parameter values and the QoS Class for that VPL. (4) If the VPL terminates a VPC in the ATM host or switch, the manager turns on the atmxVplAdminStatus to up(1) to turn the VPL traffic flow on. Otherwise, the atmxVpCrossConnectTable must be used to cross-connect the VPL to another VPL(s) in an ATM switch or network. One-Shot VPL Establishment A VPL may also be established in one step by a set-request with all necessary VPL parameter values and atmxVplRowStatus set to createAndGo(4). In contrast to the negotiated VPL establishment which allows for detailed error checking (i.e., set errors are explicitly linked to particular resource acquisition failures), the one-shot VPL establishment performs the setup on one operation but does not have the advantage of step-wise error checking. VPL Retirement A VPL is released by setting atmxVplRowStatus to destroy(6), and the agent may release all associated resources.