CISCO-SDLLC-MIB

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Organization: Cisco Systems, Inc.

Last Updated: 1998-12-17

Category: Cisco Devices, SNA and Legacy Protocols

Description: Manages SDLLC conversion bridging between Synchronous Data Link Control and IEEE 802.2 LLC for SNA-over-LAN networks.

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What Is CISCO-SDLLC-MIB?

CISCO-SDLLC-MIB manages Cisco's SDLLC feature, which performs protocol conversion between SNA's Synchronous Data Link Control (SDLC) on serial links and IEEE 802.2 LLC2 on Token Ring/LAN media, bridging legacy mainframe SNA traffic onto LAN/WAN infrastructure. It belongs to Cisco's legacy SNA/data-link internetworking feature set found on routers acting as FEP-to-LAN gateways. The MIB exposes read-only configuration and operational data about SDLLC ports and address mappings, including virtual MAC/ring assignments, bridge numbers, local acknowledgment (spoofing) settings, and per-SDLC-address conversion state. For monitoring purposes it is primarily used to confirm the operational/configuration status of each SDLLC conversion port and local-ack session rather than classic hardware health metrics like temperature or CPU. It has no strong dependency beyond the base bridging and SNA feature set on the router, and is deployed on Cisco routers used as SDLC-to-LLC2 gateways connecting SDLC-attached SNA devices to Token Ring-based FEP hosts, and network engineers typically start with a CISCO-SDLLC-MIB download to load these objects into their management tools.

IPNetwork Monitor allows you to monitor SNMP objects defined in CISCO-SDLLC-MIB. Use the built-in SNMP Monitoring Browser to explore available variables, view their current values and descriptions, and select the objects you want to monitor. You can then create SNMP monitors, configure thresholds, and receive alerts when monitored values change.

Supported Devices

Cisco routers configured as SDLC-to-LLC2 (SDLLC) gateways

Monitoring Examples

An administrator would poll convSdllcPortTable/convSdllcPortEntry to check convSdllcPortVirtMacAddr, convSdllcPortVirtRing, and convSdllcPortLocalAckState for each configured SDLLC port, confirming the virtual MAC and ring number match the intended LLC2 session and that local acknowledgment is active. The convSdllcAddrTable/convSdllcAddrEntry, keyed by convSdllcAddrSdlcAddr, lets an operator verify which SDLC station addresses are currently mapped for conversion. If convSdllcPortLocalAckState shows the session down, it flags a broken SDLC-to-LLC2 conversion path affecting SNA connectivity to the mainframe.

What Can Be Monitored

SDLLC port virtual MAC/ring configuration
local acknowledgment (spoofing) state
SDLC address-to-LLC2 mapping status
max LLC2 frame size
bridge/ring assignment per SDLLC port

Imported Objects

From CISCO-SMI

ciscoMgmt

OBJECT-IDENTITY

From IF-MIB

ifIndex

OBJECT-TYPE

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Integer32
MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE

From SNMPv2-TC

MacAddress
TruthValue

OIDs

OID symbolic	OID numeric	Type	Access	Description
ciscoSnaSdllcMIB	1.3.6.1.4.1.9.9.28			This is the MIB module for objects used to manage SDLLC. Overview of SDLLC conversion MIB MIB description The SDLLC MIB includes read-only configuration and operational information on Cisco's implementation of SDLC to LLC2 media translation. The following example shows the entities managed by the SDLLC MIB. FEP/ == Token == CISCO A == WAN/RSRB == CISCO B == Serial == SDLC Host Ring line station \|=============== LLC2 session ============\|=== SDLC session ====\| In this example configuration, CISCO B is performing the SDLLC conversion, and so we query CISCO B for this MIB. The SDLC device believes it is talking to the host via a direct SDLC session. The host believes it is talking to the SDLC station on the same token ring. CISCO A is also unaware of the SDLLC conversion going on at CISCO B; it just believes it has an RSRB session with its peer CISCO B to bridge two token ring separated by a WAN. So CISCO B is the only agent that can provide the SDLLC conversion details. We can combine this MIB with the CISCO-RSRB-MIB from either CISCO A or CISCO B to get a better picture of the network. This MIB has two tables: convSdllcPortTable has an entry for each serial interface for general SDLLC information on an interface, such as administered virtual MAC addresses and virtual ring and bridge numbers. This table is indexed by ifIndex. convSdllcAddrTable has an entry for each serial interface and SDLC address pair. It contains information specific to an SDLC address on an interface, such as the partner MAC address, XID value, and address state. This table is indexed by ifIndex and convSdllcAddrSdlcAddr (the address of the SDLC station). The above configuration would have a single entry in each table. If CISCO B had two serial lines configured for sdllc conversion, there would be two entries per table. If there were only one serial line, but it was multipoint and supported two sdlc addresses on the other end of the line, there would be a single entry in convSdllcPortTable, and two entries in convSdllcAddrTable. The MIB provides the following information for convSdllcPortTable: convSdllcPortVirtMacAddr - The locally administered MAC addressed assigned to the serial interface. Note that this address must always end in '00'. CISCO B replaces the 00 with the sdlc address of the serial device. For a multipoint configuration with two SDLC stations the llc2 side will 'see' two token ring stations with unique MAC addresses on the sdlc side. convSdllcPortVirtRing - The locally administered token ring number assigned to the serial interface. This gives the serial interface a token ring appearance to the llc2 side of the conversion, so that it appears that it is a token ring on the other side of a bridge. convSdllcPortBridge - The bridge number assigned to CISCO B convSdllcPortLlc2Ring - The token ring number on the LLC2 session side. In this case it is the RSRB virtual ring group number between CISCO A and CISCO B. convSdllcPortLocalAck - indicates whether local acknowledgement of SDLLC sessions is active. convSdllcPortLocalAckState - indicates the state of the local acknowledgement session. convSdllcPortMaxLlc2FrameSize - the largest I-frame size that can be sent or received on the LLC2 session. The MIB provides the following information for convSdllcAddrTable: convSdllcAddrSdlcAddr - The address of the SDLC station. convSdllcAddrPartnerMacAddr - The MAC address of the FEP, as specified with the sdllc partner command. convSdllcAddrXID - The IDBLK and IDNUM of the SDLC station; these must match the VTAM configured values convSdllcAddrState - indicates the state of the SDLLC conversion convSdllcAddrMaxSdlcFrameSize - the largest I-frame size that can be sent or received on the SDLC session.
convSdllcObjects	1.3.6.1.4.1.9.9.28.1
convSdllcPorts	1.3.6.1.4.1.9.9.28.1.1
convSdllcPortTable	1.3.6.1.4.1.9.9.28.1.1.1		not-accessible	Table of interfaces and SDLC addresses configured for SDLLC conversion
convSdllcPortEntry	1.3.6.1.4.1.9.9.28.1.1.1.1		not-accessible	Status and configuration values for a specific SDLLC conversion interface and SDLC address.
MAC convSdllcPortVirtMacAddr	1.3.6.1.4.1.9.9.28.1.1.1.1.1	MacAddress	read-only	The local administered virtual MAC address for the device on the serial interface.
I32 convSdllcPortVirtRing	1.3.6.1.4.1.9.9.28.1.1.1.1.2	Integer32	read-only	The virtual ring number assigned to the serial interface.
I32 convSdllcPortBridge	1.3.6.1.4.1.9.9.28.1.1.1.1.3	Integer32	read-only	The bridge number assigned to SDLLC conversion.
I32 convSdllcPortLlc2Ring	1.3.6.1.4.1.9.9.28.1.1.1.1.4	Integer32	read-only	The ring number assigned to the LLC2 side of the SDLLC conversion.
T/F convSdllcPortLocalAck	1.3.6.1.4.1.9.9.28.1.1.1.1.5	TruthValue	read-only	Indicates if all SDLLC sessions are locally acknowledged. TRUE-> SDLLC sessions are locally acknowledged FALSE-> SDLLC sessions are not locally acknowledged
INT convSdllcPortLocalAckState	1.3.6.1.4.1.9.9.28.1.1.1.1.6	INTEGER	read-only	State of the local acknowledgment session between two stations.
I32 convSdllcPortMaxLlc2FrameSize	1.3.6.1.4.1.9.9.28.1.1.1.1.7	Integer32	read-only	The largest information frame (I-frame) size that can be sent or received on the LLC2 session.
convSdllcAddrs	1.3.6.1.4.1.9.9.28.1.2
convSdllcAddrTable	1.3.6.1.4.1.9.9.28.1.2.1		not-accessible	Table of SDLC addresses configured for SDLLC conversion on a particular interface.
convSdllcAddrEntry	1.3.6.1.4.1.9.9.28.1.2.1.1		not-accessible	Status and configuration values for a specific SDLLC conversion SDLC address.
INT convSdllcAddrSdlcAddr	1.3.6.1.4.1.9.9.28.1.2.1.1.1	INTEGER	not-accessible	The address of the SDLC station.
MAC convSdllcAddrPartnerMacAddr	1.3.6.1.4.1.9.9.28.1.2.1.1.2	MacAddress	read-only	The MAC address of the LLC2 station, for device-initiated SDLLC connections.
OCT convSdllcAddrXID	1.3.6.1.4.1.9.9.28.1.2.1.1.3	OCTET STRING	read-only	The XID value that is associated with the SDLC station. This value must match the host configured value.
INT convSdllcAddrState	1.3.6.1.4.1.9.9.28.1.2.1.1.4	INTEGER	read-only	Current state of the SDLLC connection.
I32 convSdllcAddrMaxSdlcFrameSize	1.3.6.1.4.1.9.9.28.1.2.1.1.5	Integer32	read-only	The largest information frame (I-frame) size that can be sent or received on the SDLC session.
convSdllcNotificationPrefix	1.3.6.1.4.1.9.9.28.2
convSdllcNotifications	1.3.6.1.4.1.9.9.28.2.0
NTF convSdllcPeerStateChangeNotification	1.3.6.1.4.1.9.9.28.2.0.1			This Notification indicates that the state of an SDLLC connection has transitioned to connected or disconnected.
sdllcMibConformance	1.3.6.1.4.1.9.9.28.3
sdllcMibCompliances	1.3.6.1.4.1.9.9.28.3.1
sdllcMibCompliance	1.3.6.1.4.1.9.9.28.3.1.1			The compliance statement for sdllc.
sdllcMibGroups	1.3.6.1.4.1.9.9.28.3.2
convSdllcPortGroup	1.3.6.1.4.1.9.9.28.3.2.1			A collection of objects providing configuration and operational information about an SDLLC port.
convSdllcAddrGroup	1.3.6.1.4.1.9.9.28.3.2.2			A collection of objects providing configuration and operational information about an SDLC address.

RFC description

Manages SDLC-to-LLC2 protocol translation on Cisco routers connecting SDLC terminals to LAN devices.

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Download CISCO-SDLLC-MIB

What Is CISCO-SDLLC-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description