CENTILLION-IF-EXTENSIONS-MIB

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Category: ATM, Vendor: Nortel

Description: Provides additional interface management objects extending the standard IF-MIB for Nortel Centillion switch ports.

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What Is CENTILLION-IF-EXTENSIONS-MIB?

CENTILLION-IF-EXTENSIONS-MIB is a legacy Bay Networks/Centillion (built on CENTILLION-ROOT-MIB) proprietary MIB extending the standard interface table for Centillion ATM/LAN switches. Its extension table, keyed by index, records card/port number, NetBIOS-name-filtering enable/download state, NetBIOS broadcast-discard flag, NetBIOS name-proxy state, forwarding identifier, in/out no-resources counts, VLAN mismatch count, VLAN capabilities, local admin address, default physical address, VLAN-trunk flag, and user in/out discard counts. As a configuration/performance MIB it lets an administrator confirm NetBIOS-filtering and VLAN-trunk settings and watch discard counts per interface on a legacy Bay Networks Centillion switch. It is deployed on legacy Bay Networks Centillion ATM/LAN switching equipment. Engineers can download the CENTILLION-IF-EXTENSIONS-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in CENTILLION-IF-EXTENSIONS-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

Legacy Bay Networks Centillion ATM/LAN switching equipment

Monitoring Examples

An administrator checks cnIfVlanMismatch and cnIfUsrOutDiscards to diagnose a VLAN-trunk misconfiguration on a legacy Bay Networks Centillion switch port.

What Can Be Monitored

NetBIOS-filtering/VLAN-trunk configuration and interface discard counts

Imported Objects

From CENTILLION-ROOT-MIB

BitField
Boolean
EnableIndicator
MacAddress
extensions	OBJECT-IDENTITY

From RFC-1212

OBJECT-TYPE

From RFC1155-SMI

Counter

OIDs

OID symbolic	OID numeric	Type	Access	Description
cnIfExtensions	1.3.6.1.4.1.930.3.2
cnIfExtnTable	1.3.6.1.4.1.930.3.2.1		not-accessible	A list of interface entries. The numebr of entries is given by the value of ifNumber.
cnIfExtnEntry	1.3.6.1.4.1.930.3.2.1.1		not-accessible	An interface entry containing objects at the subnetwork layer and below for a particular interface.
INT cnIfExtnIndex	1.3.6.1.4.1.930.3.2.1.1.1	INTEGER	read-only	A unique value for each interface corresponding to the ifIndex value for the same interface.
INT cnIfExtnCardNumber	1.3.6.1.4.1.930.3.2.1.1.2	INTEGER	read-only	The card number associated with this particular interface.
INT cnIfExtnPortNumber	1.3.6.1.4.1.930.3.2.1.1.3	INTEGER	read-only	The port number associated with this particular interface.
INT cnIfFilterEnable	1.3.6.1.4.1.930.3.2.1.1.4	INTEGER	read-write	The state of filtering on this port. The filter port table will become valid when filters are is downloaded to the port via setting the cnIfFilterDownload object. In the high-perfomrance mode, filters will be disable on all ports execpt the management port.
BIT cnIfFilterDownload	1.3.6.1.4.1.930.3.2.1.1.5	BitField	read-write	Downloads the filters to the port. Value will always be read as zero.
ENA cnIfNetbiosNameFilteringState	1.3.6.1.4.1.930.3.2.1.1.6	EnableIndicator	read-write	The state of NetBIOS name filtering on this port. Note that a port with filtering disabled may have a valid NetBIOS name table. The table will become valid when filtering is enabled on the port.
BOO cnIfNetbiosBcastDiscard	1.3.6.1.4.1.930.3.2.1.1.7	Boolean	read-write	This indicates whether NetBIOS broadcasts are to be discarded on this interface.
ENA cnIfNetbiosNameProxyState	1.3.6.1.4.1.930.3.2.1.1.8	EnableIndicator	read-write	The state of NetBIOS name proxying on this port.
OID cnIfForwardingIdentifier	1.3.6.1.4.1.930.3.2.1.1.9	OBJECT IDENTIFIER	read-only	This object references the correspsonding instance in the MIB object which describes the ports forwarding function. For example, if the port is participating in bridging, then this object contains the OID of the bridgeGroupPortTable. If this information is not present, its value is set to the OBJECT IDENTIFIER { 0 0 }.
CTR cnIfInNoResources	1.3.6.1.4.1.930.3.2.1.1.10	Counter	read-only	The number of inbound packet which were dropped by the switch because of lack of certain type of system resource.
CTR cnIfOutNoResources	1.3.6.1.4.1.930.3.2.1.1.11	Counter	read-only	The number of outbound packet which were dropped by the switch because of lack of certain type of system resource.
CTR cnIfVlanMismatch	1.3.6.1.4.1.930.3.2.1.1.12	Counter	read-only	The number of packets which were dropped due to the switch not being able to qualify a packet based on the VLAN policies defined. This object is only valid on interfaces that represent LAN physical port.
OCT cnIfVlanCapabilities	1.3.6.1.4.1.930.3.2.1.1.13	OCTET STRING	read-only	This object contains bit mask flags to indicate support for port-based VLAN, 802.1Q Tagging, and protocol-based VLAN on a port. Bit definition: bit 0: port-based VLAN bit 1: 802.1Q Tagging bit 2: protocol-based VLAN bit 3-7:future use.
MAC cnIfExtnLocalAdminAddress	1.3.6.1.4.1.930.3.2.1.1.14	MacAddress	read-write	The interface's locally administed address if applicable. The interface's media-specific MIB must define the bit and byte ordering and format of the value contained by this object. For interfaces which do not have such an address (e.g., a serial line), this object should contain an octet string of zero length.
INT cnIfExtnPhyAddressDefault	1.3.6.1.4.1.930.3.2.1.1.15	INTEGER	read-write	This object refers to which mac address is being used: the default or locally administered address. The value of useLocallyAdministeredAddress(2) is read-only. Setting this object with useDefaultPhyAddress(1) will have the effect of deleting the locally administered address. It cannot be restored.
ENA cnIfVlanTrunk	1.3.6.1.4.1.930.3.2.1.1.16	EnableIndicator	read-write	This object controls the VLAN trunk mode for the interface. In trunk mode, the interface accepts both tagged and untagged frames in its default VLAN. Trunk mode is only available for interfaces that support 802.1Q tagging, as indicated by cnIfVlanCapabilities. An interface in trunk mode cannot do protocol-based VLAN classification. The trunk mode cannot be changed while the interface belongs to an MLT group.
CTR cnIfUsrInDiscards	1.3.6.1.4.1.930.3.2.1.1.17	Counter	read-only	The total number of inbound packets which were dropped by user-defined filters.
CTR cnIfUsrOutDiscards	1.3.6.1.4.1.930.3.2.1.1.18	Counter	read-only	The total number of outbound packets which were dropped by user-defined filters.

RFC description

Interface extension parameters and filtering for Centillion/Bay Networks switches.

Start monitoring Nortel/Bay Networks Centillion ATM/LAN switches (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 CENTILLION-IF-EXTENSIONS-MIB

What Is CENTILLION-IF-EXTENSIONS-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description