Data Link Switching MIB BOF (DLSWMIB) Reported by Deirdre Kostick/Bellcore The DLSWMIB BOF met on 6 December to gauge community interest in development of a common, standard MIB for Data Link Switching (DLSw). DLSw Overview Wayne Clark presented an overview of Data Link Switching. Data Link Switching is a method for encapsulating SNA traffic in TCP/IP. DLSw provides an internetworking solution for multi-protocol networks. The specification for DLSw is being developed at the APPN Implementors Workshop (AIW); Version 1 of the specification for DLSw is to be completed this year. Several companies offer DLSw-capable products. DLSw MIB Background Work on a common DLSw MIB began at the AIW in parallel with the work on the DLSw specification. A MIB proposal based on existing enterprise-specific MIBs has been developed. Since the goal of the AIW effort was to produce a common, standard SNMP MIB, there was interest in forming an IETF working group. DLSw MIB MIB Proposal Review Peter Gayek walked through the current proposal draft. Key points/issues resulting from that walkthrough are summarized below. (These notes are based on ``draft-aiw-dlswnm-mib-02.txt'' posted at networking.raleigh.ibm.com.) Issues/Recommendations Summary o Work on the conformance statements should be handled later, after the content of the main body of the MIB is more stable. o Retain the MIB summary in the introduction section; it is very useful to the MIB reader. o Need to add a list of port number pairs in the MIB. Identify which are used for SNA/NetBIOS. Also identify priority (e.g., high/low). o Remove dlswName (use sysName); remove dlswDescr (use sysDescr). o DLSw Code Capability - Remove dlswSnaSupport, dlswNMSupport. Information is available via the SAP list. - A given node acts in send/receive mode all the time. There are several problems with the current definition of the object. Need to represent multiple capabilities; and identify send/receive mode separately. - Create two objects (send/receive) and use an enumerated list to identify capabilities. Action Item: Ravi Periasamy will post a proposed enumerated list. o dlswAdminVirtualSegment - remove text describing when the value takes effect. o dlswAdminVirtualSegmentMTU - change from *MTU to *LF. - Check SRB enumerated list (who had this item?). - Change to INTEGER. o dlswAdminFlowCntlMode - revise description. o dlswInitRecvWndwSize - change to INTEGER 0..65. Identify expected reasonable values. o dlswStatus - change to Admin/Oper objects. Include text describing relation to sysUpTime. o DLSw Circuit Table - Need to clarify what the S1/S2 identifiers indicate (e.g., S1 is local, S2 is remote). o dlswCircuitState - need to use standard establishment states. Need to add an admin object. The management application can de-activate circuits, but cannot activate circuits. The admin object should only allow writes, not creates. o Delete Flow Control Statistics objects; they are too detailed. Add eight objects to transport connection level. Add: - total FCI S/R - independent FCI S/R - halves window received - reset send - reset received - high water mark o Delete dlswCircuitStateDownTime, dlswCircuitS1SenseCode, dlswCircuitLastS2SenseCode. Add dlswCircuitSenseCode with an enumerated list (e.g., (1) halt DL, (2) halt no-ack, (3) tcp failed). This would help determine why a circuit went down. o Revise index of dlswSdlcLinkStateTable to Local MAC Local SAP. Action Item: Wayne Clark will send out mail requesting feedback on how table is used. o Decided to remove partner configuration objects. o Traps - add trap enabled/disabled object. need to verify that the four conditions are sufficient. Goals and Milestones 12/31/94 Post proprietary MIBS 1/15/95 Post first Internet-Draft of the DLSw MIB 3/15/95 Post second Internet-Draft of DLSw MIB 4/3/95 Meet at IETF to review MIB (if necessary) 5/15/95 Post final Internet-Draft of DLSw MIB and submit to AD 6/95 Proposed Standard Draft Charter Discussion A proposed draft charter was discussed and agreed to. Description of the working group: The DLSw MIB Working Group is chartered to define a set of managed objects for devices that support Data Link Switching (DLSw) version 1. DLSw is a method for encapsulating SNA (System Network Architecture) or NetBIOS (Network Basic Input Output Services) traffic in TCP/IP. DLSw is intended to aid in the transport of SNA and NetBIOS traffic across WANs. The objects will be the minimum necessary to provide the ability to monitor and control DLSw devices, supporting fault isolation, configuration and performance management. The set of objects will be consistent with the SNMP framework and existing SNMP standards. The working group will consider existing enterprise-specific MIB modules that define objects which support management of these devices. The working group recognizes that managed objects for later versions of DLSw may need to be identified in the future. These objects are out of scope for the current (i.e., 1995) charter; however, once the working group completes its charter, a new charter identifying some or all of these components may be considered.