CISCO-DLC-SWITCH-MIB

All MIBs › CISCO-DLC-SWITCH-MIB

Organization: Cisco Systems, Inc.

Last Updated: 1997-02-19

Category: Cisco Devices, SNA and Legacy Protocols

Description: Manages Cisco DLC (Data Link Control) switching for LLC/DLC bridging, supporting legacy SNA and NetBIOS LAN-to-LAN connectivity.

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What Is CISCO-DLC-SWITCH-MIB?

CISCO-DLC-SWITCH-MIB is a Cisco private MIB for managing FRAS (Frame Relay Access Server) BNN (Boundary Network Node) switching, which bridges legacy IBM SNA (SDLC) and NetBIOS (LLC) end-station sessions onto Frame Relay for delivery to an SNA host. It exposes per-session configuration and status data for downstream/end-station connections, namely SDLC session address, state, DLCI and Frame Relay interface for frasBnnSdlcConTable, and device MAC address and LAN SAPs for frasBnnLlcConTable. It is used to monitor the software status of individual legacy SNA/NetBIOS sessions, specifically each session's connection state (bnnSdlcConState), letting an administrator confirm that downstream terminals or controllers remain properly connected through the Frame Relay cloud to the mainframe. It explicitly complements the separate FRAS-HOST MIB, which covers the upstream/host-end side of these sessions, rather than duplicating it. It's typically deployed on Cisco routers acting as a Frame Relay Access Server/boundary network node in networks that still carry legacy SNA or NetBIOS traffic from branch terminals to a mainframe data center, where a CISCO-DLC-SWITCH-MIB download helps confirm each downstream session stays connected through the Frame Relay cloud.

IPNetwork Monitor allows you to monitor SNMP objects defined in CISCO-DLC-SWITCH-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 router (Frame Relay Access Server / FRAS BNN)

Monitoring Examples

An administrator polls frasBnnSdlcConTable/frasBnnSdlcConEntry (keyed by bnnSdlcConAddress) to check bnnSdlcConState, bnnSdlcConDlci, and bnnSdlcConFRInterface for each SDLC-attached downstream device, confirming the session is up over the correct Frame Relay DLCI. For LAN-attached (LLC) sessions, frasBnnLlcConTable/bnnLlcConDeviceMacAddress and bnnLlcConLanLocalSap identify which end-station MAC address is bound to which local SAP. A session unexpectedly reporting a down or disconnected bnnSdlcConState would indicate a downstream SNA terminal or controller has lost its Frame Relay path to the host.

What Can Be Monitored

SDLC session connection state
SDLC session DLCI/Frame Relay interface
SDLC local/remote SAP
LLC session device MAC address
LLC session local SAP

Imported Objects

From CISCO-SMI

ciscoMgmt

OBJECT-IDENTITY

From IF-MIB

InterfaceIndexOrZero

From RFC1213-MIB

ifIndex

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Integer32
MODULE-IDENTITY
OBJECT-TYPE

From SNMPv2-TC

MacAddress
TEXTUAL-CONVENTION

How to Use in IPNetwork Monitor

Example using bnnSdlcConState OID:

Select a Cisco router (Frame Relay Access Server / FRAS BNN, legacy) as the target host to create a monitor — the SNMP service should be up and running on it. Click New Monitor, then check SNMP Custom on the Favorites tab, click Next, and confirm the host. On the next page, click Select... to open the built-in SNMP MIB Browser and type bnnSdlcConState into the Find box to locate it in the OID tree, selecting the specific row/instance you want to monitor since this is a table column, then select it and click OK. The FRAS connection state of this Link Station — reset, testSent, xidexchg, connrqsent, sigstnwait, connrspwait, connrspsent, contacted, or discwait. On the monitor's Main parameters page you can set the target's SNMP port (default 161), credentials, polling interval, and other settings — see the SNMP Monitor help for details. On the State conditions and Alerting tabs, configure when the monitor should change state and trigger an alert; since this is an INTEGER-type OID, Value bounds is the most useful condition here — trigger an alert if the value is anything other than 'contacted' for longer than a normal connection setup takes, since 'contacted' is this link station's steady connected state. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
ciscoDlcSwitchMIB	1.3.6.1.4.1.9.9.76			This is the MIB module for objects used to manage FRAS sessions to the endstation. These objects are specific to downstream or enduster sessions only. It does not contain objects supported by the FRAS-HOST MIB which are specific to upstream or host-end sessions.
ciscoDlcSwitchMIBObjects	1.3.6.1.4.1.9.9.76.1
frasBnnSdlc	1.3.6.1.4.1.9.9.76.1.1
frasBnnSdlcConTable	1.3.6.1.4.1.9.9.76.1.1.1		not-accessible	This table contains mapping information for each SDLC Link Station in a FRAS-BNN to SDLC connection. All entries are derived entirely from the router configuration.
frasBnnSdlcConEntry	1.3.6.1.4.1.9.9.76.1.1.1.1		not-accessible	This table contains the entries defined for a specific SDLC Link Station in a BNN-SDLC configuration.
ADR bnnSdlcConAddress	1.3.6.1.4.1.9.9.76.1.1.1.1.1	SdlcAddress	not-accessible	This value is the poll address of the secondary link station for this SDLC link. It uniquely identifies the SDLC link station within a single SDLC port.
INT bnnSdlcConStateEx	1.3.6.1.4.1.9.9.76.1.1.1.1.2	INTEGER	read-only	Contains the FRAS state of the Link Station. reset - no activity testSent - TEST Frames sent xidexchg - XID exchange in progress connrqsent - Connect request sent sigstnwait - Signal station wait state connrspwait - Connect response wait state connrspsent - Connect response sent contacted - Session established discwait - Disconnect wait state
I32 bnnSdlcConDlci	1.3.6.1.4.1.9.9.76.1.1.1.1.3	Integer32	read-only	The Data Link Connection Identifier used for this particular connection.
NUM bnnSdlcConFRInterface	1.3.6.1.4.1.9.9.76.1.1.1.1.4	InterfaceIndexOrZero	read-only	This is the Frame-Relay interface which the SDLC Link Station is using to connect to the Host.
SAP bnnSdlcConLocalSap	1.3.6.1.4.1.9.9.76.1.1.1.1.5	SAP	read-only	The Local SAP for this SDLC station's corresponding LLC session to the host.
SAP bnnSdlcConRemoteSap	1.3.6.1.4.1.9.9.76.1.1.1.1.6	SAP	read-only	The Remote SAP for this SDLC station's corresponding LLC session to the host.
frasBnnLlc	1.3.6.1.4.1.9.9.76.1.2
frasBnnLlcConTable	1.3.6.1.4.1.9.9.76.1.2.1		not-accessible	This table contains information for each End Station in a FRAS-BNN to LLC connection. The entries are derived entirely from the router configuration.
frasBnnLlcConEntry	1.3.6.1.4.1.9.9.76.1.2.1.1		not-accessible	This table contains information for a specific End Station's connection state in a BNN-LLC connection.
MAC bnnLlcConDeviceMacAddress	1.3.6.1.4.1.9.9.76.1.2.1.1.1	MacAddress	not-accessible	This value is the End Station's Local Mac-Address.
SAP bnnLlcConLanLocalSap	1.3.6.1.4.1.9.9.76.1.2.1.1.2	SAP	not-accessible	The End Station's Local SAP.
SAP bnnLlcConLanRemoteSap	1.3.6.1.4.1.9.9.76.1.2.1.1.3	SAP	not-accessible	The End Station's Remote SAP.
NUM bnnLlcConLanInterface	1.3.6.1.4.1.9.9.76.1.2.1.1.4	InterfaceIndexOrZero	read-only	This is the physical interace which the End Station is attached to.
I32 bnnLlcConDlci	1.3.6.1.4.1.9.9.76.1.2.1.1.5	Integer32	read-only	The Data Link Connection Identifier associated with the corresponding LLC2 session over Frame-Relay to the host.
INT bnnLlcConState	1.3.6.1.4.1.9.9.76.1.2.1.1.6	INTEGER	read-only	Contains the FRAS state of the Link Station. reset - no activity testSent - TEST Frames sent xidexchg - XID exchange in progress connrqsent - Connect request sent sigstnwait - Signal station wait state connrspwait - Connect response wait state connrspsent - Connect response sent contacted - Session established discwait - Disconnect wait state
MAC bnnLlcConLocalMacAddress	1.3.6.1.4.1.9.9.76.1.2.1.1.7	MacAddress	read-only	The Mac-Address configured as the End Station's target or Remote address.
SAP bnnLlcConFrLocalSap	1.3.6.1.4.1.9.9.76.1.2.1.1.8	SAP	read-only	The FRAS router's Local SAP.
SAP bnnLlcConFrRemoteSap	1.3.6.1.4.1.9.9.76.1.2.1.1.9	SAP	read-only	The FRAS router's Remote SAP.
frasBanSdlc	1.3.6.1.4.1.9.9.76.1.3
frasBanSdlcConTable	1.3.6.1.4.1.9.9.76.1.3.1		not-accessible	This table contains information for each SDLC Link Station in a FRAS-BAN to SDLC connection. The entries are derived entirely from the router configuration.
frasBanSdlcConEntry	1.3.6.1.4.1.9.9.76.1.3.1.1		not-accessible	This table contains information for a specific SDLC Link Station in a configured for a BAN connection.
NUM banSdlcConLocalInterface	1.3.6.1.4.1.9.9.76.1.3.1.1.1	InterfaceIndexOrZero	read-only	This is the physical interface the SDLC Link Stations are connected to.
ADR banSdlcConAddress	1.3.6.1.4.1.9.9.76.1.3.1.1.2	SdlcAddress	read-only	This value is the poll address of the secondary link station for this SDLC link. It uniquely identifies the SDLC link station within a single SDLC port.
MAC banSdlcConBanDlciMac	1.3.6.1.4.1.9.9.76.1.3.1.1.3	MacAddress	read-only	The End Station's target or Remote mac-address.
I32 banSdlcConDlci	1.3.6.1.4.1.9.9.76.1.3.1.1.4	Integer32	read-only	The Data Link Connection Identifier for the corresponding LLC2 session over Frame-Relay to the host.
INT banSdlcConState	1.3.6.1.4.1.9.9.76.1.3.1.1.5	INTEGER	read-only	Contains the FRAS state of the Link Station. reset - no activity testSent- TEST Frames sent xidexchg - XID exchange in progress connrqsent - Connect request sent sigstnwait - Signal station wait state connrspwait - Connect response wait state connrspsent - Connect response sent contacted - Session established discwait - Disconnect wait state
MAC banSdlcConVmac	1.3.6.1.4.1.9.9.76.1.3.1.1.6	MacAddress	read-only	The End Station's virtual Mac-Address which is comprised of a TR formatted template and the SDLC Link Station address appended on the last nibble.
MAC banSdlcConBniAddress	1.3.6.1.4.1.9.9.76.1.3.1.1.7	MacAddress	read-only	BNI is Boundary Node Identifier which is the FRAS-BAN connection's Remote address in TR-format. It is by default 4fff.0000.0000
SAP banSdlcConFrLocalSap	1.3.6.1.4.1.9.9.76.1.3.1.1.8	SAP	read-only	The FRAS router's Local SAP.
SAP banSdlcConFrRemoteSap	1.3.6.1.4.1.9.9.76.1.3.1.1.9	SAP	read-only	The FRAS router's Remote SAP.
frasBanLlc	1.3.6.1.4.1.9.9.76.1.4
frasBanLlcConTable	1.3.6.1.4.1.9.9.76.1.4.1		not-accessible	This table contains information for each LAN attached End Station in a FRAS-BAN to LAN connection. The entries are from endstations which have their destination mac-addresses as the BAN-DLCI-MAC address.
frasBanLlcConEntry	1.3.6.1.4.1.9.9.76.1.4.1.1		not-accessible	This table contains information for a specific LAN attached End Station.
MAC banLlcEndstnLocalMac	1.3.6.1.4.1.9.9.76.1.4.1.1.1	MacAddress	read-only	This value is the End Station's Local Mac-Address.
MAC banLlcBanDlciMac	1.3.6.1.4.1.9.9.76.1.4.1.1.2	MacAddress	read-only	This value is the End Station's Remote Mac-Address. It is also the FRAS-BAN connection's Local Mac-Address.
SAP banLlcConLocalSap	1.3.6.1.4.1.9.9.76.1.4.1.1.3	SAP	read-only	The endstation's Local SAP.
SAP banLlcConRemoteSap	1.3.6.1.4.1.9.9.76.1.4.1.1.4	SAP	read-only	The endstation's Remote SAP.
I32 banLlcConDlci	1.3.6.1.4.1.9.9.76.1.4.1.1.5	Integer32	read-only	The Data Link Connection Identifier associated with the corresponding LLC2 session over Frame-Relay to the host.
INT banLlcConState	1.3.6.1.4.1.9.9.76.1.4.1.1.6	INTEGER	read-only	Contains the FRAS state of the Link Station. reset - no activity testSent- TEST Frames sent xidexchg - XID exchange in progress connrqsent - Connect request sent sigstnwait - Signal station wait state connrspwait - Connect response wait state connrspsent - Connect response sent contacted - Session established discwait - Disconnect wait state
NUM banLlcConFrInterface	1.3.6.1.4.1.9.9.76.1.4.1.1.7	InterfaceIndexOrZero	read-only	This is the Frame-Relay interface for this particular session.
MAC banLlcBniAddress	1.3.6.1.4.1.9.9.76.1.4.1.1.8	MacAddress	read-only	This value is the FRAS-BAN connection's Target Mac-Address. It is by default 4fff.0000.0000
SAP banLlcConFrLocalSap	1.3.6.1.4.1.9.9.76.1.4.1.1.9	SAP	read-only	The Local SAP of the corresponding LLC2 session over Frame-Relay to the host.
SAP banLlcConFrRemoteSap	1.3.6.1.4.1.9.9.76.1.4.1.1.10	SAP	read-only	The Remote SAP of the corresponding LLC2 session over Frame-Relay to the host.
ciscoDlcSwitchConformance	1.3.6.1.4.1.9.9.76.2
ciscoDlcSwitchCompliances	1.3.6.1.4.1.9.9.76.2.1
ciscoDlcSwitchCoreCompliance	1.3.6.1.4.1.9.9.76.2.1.1			The core compliance statement for all FRAS connections.
ciscoDlcSwitchGroups	1.3.6.1.4.1.9.9.76.2.2
frasBnnSdlcGroup	1.3.6.1.4.1.9.9.76.2.2.1			The frasBnnSdlcGroup defines objects which are common to the BNN SDLC of all compliant connections.
frasBnnLlcGroup	1.3.6.1.4.1.9.9.76.2.2.2			The frasBnnLlcGroup defines objects which are common to the BNN LLC of all compliant connections.
frasBanSdlcGroup	1.3.6.1.4.1.9.9.76.2.2.3			The frasBanSdlcGroup defines objects which are common to the BAN SDLC of all compliant connections.
frasBanLlcGroup	1.3.6.1.4.1.9.9.76.2.2.4			The frasBanLlcGroup defines objects which are common to the BAN LLC of all compliant connections.

RFC description

Manages Frame Relay Access Support (FRAS) sessions for SDLC and LLC connections in bridged and routed formats.

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Download CISCO-DLC-SWITCH-MIB