CNT246-MIB

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Organization: Computer Network Technology Corporation

Last Updated: 2001-03-09

Category: Fibre Channel and Storage, Vendor: CNT

Description: Provides management objects for CNT 2.46 Fibre Channel director and fabric switch devices.

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What Is CNT246-MIB?

CNT246-MIB is a Computer Network Technology (CNT) MIB defining the Transport layer used within CNT's Fibre Channel director/fabric switch and channel-extension products, carrying CNT's proprietary traffic between network links. It exposes per-slot transport link configuration (bus/VID identifiers, link type and description) and status (link up/down state), as well as QoS-related IP Type-of-Service settings for the underlying IP transport path. It is directly useful for monitoring hardware link health: cnt2TransportLinkStatus per slot reveals whether a fibre-channel/transport link has gone down, which is a hardware fault indicator on the director/switch. It is part of the CNT Zeus/UltraNet proprietary MIB family, related to modules like CNT242-MIB (ESCON engine) that cover other subsystems of the same channel-extension platform. It would have been deployed in legacy SAN/mainframe-extension environments running CNT fibre-channel director hardware, and the CNT246-MIB MIB remains a useful reference for engineers maintaining or documenting that legacy transport layer.

IPNetwork Monitor allows you to monitor SNMP objects defined in CNT246-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

CNT (Computer Network Technology) Fibre Channel director/fabric switch
CNT Zeus/UltraNet channel-extension system

Monitoring Examples

An admin would poll cnt2TransportTable/Entry, indexed by cnt2TransportSlotIndex and cnt2TransportIndex, checking cnt2TransportLinkStatus to spot an unexpected link-down condition on a specific transport slot. cnt2TransportLinkType and cnt2TransportLinkDesc identify what kind of link is configured on that slot, useful when diagnosing which physical connection failed. cnt2TransportIPtosPrecedence, cnt2TransportIPtosDelay, and cnt2TransportIPtosThruput let the operator verify the QoS settings applied to IP-based transport paths carrying the CNT proprietary traffic.

What Can Be Monitored

per-slot transport link status
link type and description
bus/VID identifiers
IP ToS precedence, delay, and throughput settings for transport paths

Imported Objects

From SNMPv2-SMI

Counter32
Counter64
Integer32
IpAddress
MODULE-IDENTITY
OBJECT-TYPE
TimeTicks
enterprises

From SNMPv2-TC

DisplayString

How to Use in IPNetwork Monitor

Example using cnt2TransportInPkts OID:

Select a CNT Fibre Channel director/fabric switch (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 cnt2TransportInPkts 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 number of packets transmitted to the link. 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 a Counter32-type OID, Value bounds is the most useful condition here — trigger an alert if the counter increases sharply between polls relative to its normal baseline, since an unexpected spike often reflects a real change in traffic or activity. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
cnt2Transport	1.3.6.1.4.1.333.2.4.6			This defines the CNT Transport MIB. The Transport layer provides network link for CNT proprietary traffic.
cnt2TransportTable	1.3.6.1.4.1.333.2.4.6.1		not-accessible	A list of Transport network link entries.
cnt2TransportEntry	1.3.6.1.4.1.333.2.4.6.1.1		not-accessible	A Transport network link entry.
I32 cnt2TransportSlotIndex	1.3.6.1.4.1.333.2.4.6.1.1.1	Integer32	read-only	The slot index for this Transport entry
I32 cnt2TransportIndex	1.3.6.1.4.1.333.2.4.6.1.1.2	Integer32	read-only	The relative index of the bus number in this Transport entry
I32 cnt2TransportBus	1.3.6.1.4.1.333.2.4.6.1.1.3	Integer32	read-only	The network link bus number
I32 cnt2TransportVid	1.3.6.1.4.1.333.2.4.6.1.1.4	Integer32	read-only	The virtual circuit number VCI. If ATM is used, make sure this Vid is configured the same as the VCI. Failure to do so will cause unexpected results
INT cnt2TransportLinkType	1.3.6.1.4.1.333.2.4.6.1.1.5	INTEGER	read-only	The Link type supported by the CNT Transport layer.
STR cnt2TransportLinkDesc	1.3.6.1.4.1.333.2.4.6.1.1.6	DisplayString	read-only	The description of the network link suported by the CNT Transport layer
INT cnt2TransportLinkStatus	1.3.6.1.4.1.333.2.4.6.1.1.7	INTEGER	read-only	The network link's status. The link status indicates if there is communication between the local node and the remote node.
INT cnt2TransportIPtosPrecedence	1.3.6.1.4.1.333.2.4.6.1.1.8	INTEGER	read-write	The service precedence of IP Type of Service use by this link. There is an 8 bit field in an IP datagram that specifies the type of service a datagram is requesting (or hinting). It may then be used by the network to determine paths and precedence for a given datagram. The specific bits used may vary depending on the network (see RFC 791 for more details). The IpServiceType attribute can be used on a per circuit basis to specify the bits to be set in the IP datagram's service type field. Each Transport IP datagram destined for the DestionationIpAddress will have this field set. This attributes only applicable to IP providers. The service precedence is in bit 0-2 of the 8 bit IP Type of Service field.
INT cnt2TransportIPtosDelay	1.3.6.1.4.1.333.2.4.6.1.1.9	INTEGER	read-write	The IP Type of Service Delay option use by this link. The Delay bit is in bit 3 of the 8 bit IP Type of Service field.
INT cnt2TransportIPtosThruput	1.3.6.1.4.1.333.2.4.6.1.1.10	INTEGER	read-write	The IP Type of Service Throughput option use by this link. The Throughput bit is in bit 4 of the 8 bit IP Type of Service field.
INT cnt2TransportIPtosRelibility	1.3.6.1.4.1.333.2.4.6.1.1.11	INTEGER	read-write	The IP Type of Service Relibility option use by this link. The Relibility bit is in bit 5 of the 8 bit IP Type of Service field.
IP cnt2TransportRemoteIp	1.3.6.1.4.1.333.2.4.6.1.1.12	IpAddress	read-only	The remote IP address. This address is set when Transport is configured.
INT cnt2TransportProtocol	1.3.6.1.4.1.333.2.4.6.1.1.13	INTEGER	read-only	The protocol used by this link. At the moment the only protocol is SAP.
INT cnt2TransportCompressionOption	1.3.6.1.4.1.333.2.4.6.1.1.14	INTEGER	read-write	Reflects whether compression option is turned on/off.
I32 cnt2TransportMaxXmitRate	1.3.6.1.4.1.333.2.4.6.1.1.15	Integer32	read-write	The Maximum Transfer Rate of this link.
TIK cnt2TransportResetTime	1.3.6.1.4.1.333.2.4.6.1.1.16	TimeTicks	read-only	The time, in seconds, when the stats was last reset.
C32 cnt2TransportInPktsEx	1.3.6.1.4.1.333.2.4.6.1.1.17	Counter32	read-only	The number of packets transmitted to the link
C64 cnt2TransportInOctets	1.3.6.1.4.1.333.2.4.6.1.1.18	Counter64	read-only	The number of bytes transmitted to the link
C32 cnt2TransportOutPkts	1.3.6.1.4.1.333.2.4.6.1.1.19	Counter32	read-only	The number of packets transmitted out from the link
C64 cnt2TransportOutOctets	1.3.6.1.4.1.333.2.4.6.1.1.20	Counter64	read-only	The number of bytes transmitted out from the link
C32 cnt2TransportRexmit	1.3.6.1.4.1.333.2.4.6.1.1.21	Counter32	read-only	The number of packets being retransmitted
C32 cnt2TransportOosHigh	1.3.6.1.4.1.333.2.4.6.1.1.22	Counter32	read-only	The number of out of sequence packets received
INT cnt2TransportStatsReset	1.3.6.1.4.1.333.2.4.6.1.1.23	INTEGER	read-write	Setting this will result the Transport statistic to be reset
C64 cnt2TransportRawOutOctets	1.3.6.1.4.1.333.2.4.6.1.1.24	Counter64	read-only	The number of bytes transmitted out from the lower interface of Transport layer. This is the amount of data after Compression plus Transport header.
C64 cnt2TransportRawInOctets	1.3.6.1.4.1.333.2.4.6.1.1.25	Counter64	read-only	The number of bytes received in from the lower interface of Transport layer. This is the amount of data after Compression plus Transport header.
I32 cnt2TransportWindowSize	1.3.6.1.4.1.333.2.4.6.1.1.26	Integer32	read-only	The current window size, value is number buffers outstanding on the connection
I32 cnt2TransportSegmentSize	1.3.6.1.4.1.333.2.4.6.1.1.27	Integer32	read-only	Range from (0 to 65532) If this value is non-zero, this value is used for segmentation. If equal to 0, then TransportSegmentSizeHi is what being used.
I32 cnt2TransportSegmentSizeHi	1.3.6.1.4.1.333.2.4.6.1.1.28	Integer32	read-only	Range from (0 to 65532) If this value is used when TransportSegmentSize is set to 0. This value is passed in from user layer's MTU size.
I32 cnt2TransportRoundTripTimer	1.3.6.1.4.1.333.2.4.6.1.1.29	Integer32	read-only	The current round trip timer. each count is in 50msec.
C32 cnt2TransportHoldCount	1.3.6.1.4.1.333.2.4.6.1.1.30	Counter32	read-only	The current hold count.
C32 cnt2TransportHoldCountRatio1	1.3.6.1.4.1.333.2.4.6.1.1.31	Counter32	read-only	Incremented when an ack is received and there is no data on the hold queue and there is no outstanding (unacked) data. It indicates that transmission is idled until more data is received from the user.
C32 cnt2TransportHoldCountRatio2	1.3.6.1.4.1.333.2.4.6.1.1.32	Counter32	read-only	Incremented when an ack is received and there is no data on the hold queue but there is outstanding (unacked) data.
C32 cnt2TransportHoldCountRatio3	1.3.6.1.4.1.333.2.4.6.1.1.33	Counter32	read-only	Incremented when an ack is received and there is data on the hold queue ready to be sent.
C32 cnt2TransportTotalDisconnect	1.3.6.1.4.1.333.2.4.6.1.1.34	Counter32	read-only	Total disconnects at Transport Layer.

RFC description

Computer Network Technology transport layer MIB for network link management and QoS configuration.

Start monitoring CNT Fibre Channel director/fabric switch (legacy) with a free 30-day trial of IPNetwork Monitor. Import MIBs, browse SNMP OIDs, create custom SNMP monitors, configure alerts, and monitor any SNMP-enabled network device from a single console.

Download CNT246-MIB