Logical Links.

The Fore-Switch-MIB implements several tables containing information about configured ATM PVCs and PVPs. The pnniSpvpcSrcTable contains information about SPVPCs (Smart Permanent Virtual Path Connections) that have the managed switch as their source, and is used by the Fore TA to retrieve information about PVPs configured at the current node. Similarly, the pnniSpvcSrcTable contains information about SPVCs (Smart Permanent Virtual Circuits) that have the managed switch as their source, and is used by the Fore TA to retrieve information about PVCs. The current version of the Fore TA includes ATM PVCs and PVPs in the INMS database only when both end points of the switched part of the virtual connection are Fore ATM switches managed by GateNM.

% discover SPVPCs
autodiscovery_mapping(
SrcN,
[[pnniSpvpcSrcCallingPort, I] = SrcPort,
[pnniSpvpcSrcCallingVPI, I] = SrcVpi,
[pnniSpvpcSrcCalledAtmAddr, I] = DstAddr, % NSAP address
[pnniSpvpcSrcCalledPort, I] = DstPort,
[pnniSpvpcSrcCalledAssignedVPI, I] = DstVpi,
[pnniSpvpcSrcName, I] = SPVPCname,
% [pnniSpvpcSrcQosIndex, I] = QosIndex,
% [pnniSpvpcSrcFwdQoSClass, I] = FwdQos,
% [pnniSpvpcSrcBckQoSClass, I] = BckQos,
% can read qosClassName in QosClassExpansionTable
[pnniSpvpcSrcRowStatus, I] = RowStat],
MappedObject
) :-
RowStat == 1, % only entries with status = valid
% unify DstN. Succeds only if destination node in database
atmAddress(DstN, _DstBoard, DstAddr),
% nsapPrefix defined as leading 13 octects of NSAP address:
% atom_prefix(DstAddr, 13, NsapPre),
% nsapPrefix(DstN, _DstBoard, NsapPre),
% SrcPort and DstPort are global port numbers
% retrieve source and destination module numbers:
pPortGlobal(SrcN, SrcM, _SrcP, SrcPort, _),
pPortGlobal(DstN, DstM, _DstP, DstPort, _),
MappedObject =
[userPoll(getAtmPvc(I, SPVPCname, SrcN, SrcM, SrcPort, 1, DstN, DstM, DstPort,
1, 'SPVPC', SrcVpi, 0, DstVpi, 0))], !
;
MappedObject = []
.

PVP connections are stored in the database with a value of 0 for the VCI parameter required by the INMS atmPvc object. In the case of (smart) PVC connections, source and destination VCIs are read from the correspondig MIB table.

% discover SPVCCs
autodiscovery_mapping(
SrcN,
[[pnniSpvcSrcCallingPort, I] = SrcPort,
[pnniSpvcSrcCallingVPI, I] = SrcVpi,
[pnniSpvcSrcCallingVCI, I] = SrcVci,
[pnniSpvcSrcCalledAtmAddr, I] = DstAddr, % NSAP address
[pnniSpvcSrcCalledPort, I] = DstPort,
[pnniSpvcSrcCalledAssignedVPI, I] = DstVpi,
[pnniSpvcSrcCalledAssignedVCI] = DstVci,
[pnniSpvcSrcName, I] = SPVCname,
% [pnniSpvcSrcQosIndex, I] = QosIndex,
% [pnniSpvcSrcFwdQoSClass, I] = FwdQos,
% [pnniSpvcSrcBckQoSClass, I] = BckQos,
% can read qosClassName in QosClassExpansionTable
[pnniSpvcSrcEntryStatus, I] = RowStat],
MappedObject
) :-
RowStat == 1, % only entries with status = valid
% unify DstN. Succeds only if destination node in database
atmAddress(DstN, _DstBoard, DstAddr),
% nsapPrefix defined as leading 13 octects of NSAP address:
% atom_prefix(DstAddr, 13, NsapPre),
% nsapPrefix(DstN, _DstBoard, NsapPre),
% SrcPort and DstPort are global port numbers
% retrieve source and destination module numbers:
pPortGlobal(SrcN, SrcM, _SrcP, SrcPort, _),
pPortGlobal(DstN, DstM, _DstP, DstPort, _),
MappedObject =
[userPoll(getAtmPvc(I, SPVCname, SrcN, SrcM, SrcPort, 1, DstN, DstM, DstPort, 1,
'SPVCC', SrcVpi, SrcVci, DstVpi, DstVci))], !
;
MappedObject = []
.