NETGEAR-ISDP-MIB

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Organization: Netgear

Last Updated: 2007-12-03

Description: NETGEAR-ISDP-MIB module

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What Is NETGEAR-ISDP-MIB?

NETGEAR-ISDP-MIB is a Netgear FASTPATH private MIB implementing ISDP (Industry Standard Discovery Protocol), Netgear's equivalent of Cisco Discovery Protocol, used to discover directly connected neighbor devices. It exposes per-interface ISDP enable configuration and a neighbor cache table listing each discovered device's address, local interface, protocol version, and device ID. It functions as a topology/neighbor-discovery status MIB: the neighbor cache table lets an administrator see which devices are currently visible on each local port, useful for verifying expected network topology and catching an unexpected disappearance of a neighbor, which typically signals a link or neighboring-device failure, rather than reporting internal hardware sensors. It is functionally analogous to and interoperable with Cisco's CDP, so it is often relied on in mixed-vendor networks for topology discovery. It is deployed on Netgear FASTPATH switches in enterprise LANs to aid topology mapping and neighbor-connectivity troubleshooting. Engineers can download the NETGEAR-ISDP-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in NETGEAR-ISDP-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

Netgear FASTPATH-based managed switch

Monitoring Examples

agentIsdpInterfaceTable/agentIsdpInterfaceEntry with agentIsdpInterfaceEnable shows per-port ISDP enablement, while agentIsdpCacheTable/agentIsdpCacheEntry, indexed by agentIsdpCacheIfIndex and agentIsdpCacheIndex, holds agentIsdpCacheAddress, agentIsdpCacheDeviceId, and agentIsdpCacheVersion for each discovered neighbor. An administrator polling agentIsdpCacheTable for a given agentIsdpCacheLocalIntf who finds an expected agentIsdpCacheDeviceId missing can infer that the physical link or the neighboring device itself has gone down. Tracking agentIsdpCacheVersion also helps confirm neighboring devices are running compatible discovery-protocol versions.

What Can Be Monitored

per-interface ISDP enable status
discovered neighbor device ID
neighbor device address
neighbor cache local interface mapping
neighbor protocol version

Imported Objects

From Netgear-MIB

ng7000managedswitch

OBJECT-IDENTITY

From RFC1213-MIB

DisplayString

From SNMPv2-SMI

Counter32
Integer32
MODULE-IDENTITY
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

TEXTUAL-CONVENTION
TimeStamp

How to Use in IPNetwork Monitor

Example using agentIsdpStatisticsPduReceived OID:

Select a Netgear FASTPATH-based managed switch (ISDP neighbor discovery) 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 agentIsdpStatisticsPduReceived into the Find box to locate it in the OID tree, then select it and click OK. It reports the display the number of all ISDP pdu received. 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 (in packets), 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
fastPathIsdp	1.3.6.1.4.1.4526.10.39			The NETGEAR Private MIB for FastPath ISDP
agentIsdpMIBObjects	1.3.6.1.4.1.4526.10.39.1
agentIsdpGlobal	1.3.6.1.4.1.4526.10.39.1.1
agentIsdpClear	1.3.6.1.4.1.4526.10.39.1.1.1
INT agentIsdpClearStats	1.3.6.1.4.1.4526.10.39.1.1.1.1	INTEGER	read-write	Clear ISDP stats.
INT agentIsdpClearEntries	1.3.6.1.4.1.4526.10.39.1.1.1.2	INTEGER	read-write	Clear ISDP entries table.
agentIsdpStatistics	1.3.6.1.4.1.4526.10.39.1.1.2
C32 agentIsdpStatisticsPduReceivedEx	1.3.6.1.4.1.4526.10.39.1.1.2.1	Counter32	read-only	Display the number of all ISDP pdu received.
C32 agentIsdpStatisticsPduTransmit	1.3.6.1.4.1.4526.10.39.1.1.2.2	Counter32	read-only	Display the number of all ISDP pdu transmitted.
C32 agentIsdpStatisticsV1PduReceived	1.3.6.1.4.1.4526.10.39.1.1.2.3	Counter32	read-only	Display the number of v1 ISDP pdu received.
C32 agentIsdpStatisticsV1PduTransmit	1.3.6.1.4.1.4526.10.39.1.1.2.4	Counter32	read-only	Display the number of v1 ISDP pdu transmitted.
C32 agentIsdpStatisticsV2PduReceived	1.3.6.1.4.1.4526.10.39.1.1.2.5	Counter32	read-only	Display the number of v2 ISDP pdu received.
C32 agentIsdpStatisticsV2PduTransmit	1.3.6.1.4.1.4526.10.39.1.1.2.6	Counter32	read-only	Display the number of v2 ISDP pdu transmitted.
C32 agentIsdpStatisticsBadHeaderPduReceived	1.3.6.1.4.1.4526.10.39.1.1.2.7	Counter32	read-only	Display the number of ISDP pdu with bad header received.
C32 agentIsdpStatisticsChkSumErrorPduReceived	1.3.6.1.4.1.4526.10.39.1.1.2.8	Counter32	read-only	Display the number of ISDP pdu with chksum error received.
C32 agentIsdpStatisticsFailurePduTransmit	1.3.6.1.4.1.4526.10.39.1.1.2.9	Counter32	read-only	Display the number of ISDP pdu transmition failures.
C32 agentIsdpStatisticsInvalidFormatPduReceived	1.3.6.1.4.1.4526.10.39.1.1.2.10	Counter32	read-only	Display the number of ISDP pdu in invalid format received.
C32 agentIsdpStatisticsTableFull	1.3.6.1.4.1.4526.10.39.1.1.2.11	Counter32	read-only	Display the number of ISDP entry table was full.
C32 agentIsdpStatisticsIpAddressTableFull	1.3.6.1.4.1.4526.10.39.1.1.2.12	Counter32	read-only	Display the number of ISDP entry address table was full.
INT agentIsdpGlobalRun	1.3.6.1.4.1.4526.10.39.1.1.4	INTEGER	read-write	An indication of whether the Indastry Standart Discovery Protocol is currently running. Entries in agentIsdpCacheTable are deleted when ISDP is disabled.
INT agentIsdpGlobalMessageInterval	1.3.6.1.4.1.4526.10.39.1.1.5	INTEGER	read-write	The interval at which ISDP messages are to be generated. The default value is 60 seconds. This is also known as the ISDP timer.
INT agentIsdpGlobalHoldTime	1.3.6.1.4.1.4526.10.39.1.1.6	INTEGER	read-write	The time for the receiving device holds ISDP message. The default value is 180 seconds.
STR agentIsdpGlobalDeviceId	1.3.6.1.4.1.4526.10.39.1.1.7	DisplayString	read-only	The device ID advertised by this device. The format of this device ID is characterized by the value of agentIsdpGlobalDeviceIdFormat object.
INT agentIsdpGlobalAdvertiseV2	1.3.6.1.4.1.4526.10.39.1.1.8	INTEGER	read-write	An indication of whether the Indastry Standart Discovery Protocol V2 is currently enabled.
BIT agentIsdpGlobalDeviceIdFormatCpb	1.3.6.1.4.1.4526.10.39.1.1.9	Bits	read-only	Indicate the Device ID format capability of the device. serialNumber(0) indicates that the device supports using serial number as the format for its Device ID. macAddress(1) indicates that the device supports using layer 2 MAC address as the format for its Device ID. other(2) indicates that the device supports using its platform specific format as the format for its Device ID.
INT agentIsdpGlobalDeviceIdFormat	1.3.6.1.4.1.4526.10.39.1.1.10	INTEGER	read-only	An indication of the format of Device ID contained in the corresponding instance of agentIsdpGlobalDeviceId. User can only specify the formats which the device is capable of as denoted in agentIsdpGlobalDeviceIdFormatCpb object. serialNumber(1) indicates that the value of agentIsdpGlobalDeviceId object is in the form of an ASCII string contain the device serial number. macAddress(2) indicates that the value of agentIsdpGlobalDeviceId object is in the form of Layer 2 MAC address. other(3) indicates that the value of agentIsdpGlobalDeviceId object is in the form of a platform specific ASCII string contain info that identifies the device. For example: ASCII string contains serialNumber appended/prepened with system name.
agentIsdpCache	1.3.6.1.4.1.4526.10.39.1.2
agentIsdpCacheTable	1.3.6.1.4.1.4526.10.39.1.2.1		not-accessible	The (conceptual) table containing the cached information obtained via receiving ISDP messages.
agentIsdpCacheEntry	1.3.6.1.4.1.4526.10.39.1.2.1.1		not-accessible	An entry (conceptual row) in the agentIsdpCacheTable, containing the information received via ISDP on one interface from one device. Entries appear when a ISDP advertisement is received from a neighbor device. Entries disappear when ISDP is disabled on the interface, or globally.
I32 agentIsdpCacheIfIndex	1.3.6.1.4.1.4526.10.39.1.2.1.1.1	Integer32	not-accessible	Normally, the ifIndex value of the local interface.
I32 agentIsdpCacheIndex	1.3.6.1.4.1.4526.10.39.1.2.1.1.2	Integer32	not-accessible	Index value is unique integer id of each neighbor entry.
STR agentIsdpCacheAddress	1.3.6.1.4.1.4526.10.39.1.2.1.1.3	DisplayString	read-only	The (first) network-layer address of the device's SNMP-agent as reported in the Address TLV of the most recently received ISDP message. For example, if the corresponding instance of cacheAddressType had the value 'ip(1)', then this object would be an IP-address.
STR agentIsdpCacheLocalIntf	1.3.6.1.4.1.4526.10.39.1.2.1.1.4	DisplayString	read-only	The device Interface which had this neighbor.
STR agentIsdpCacheVersion	1.3.6.1.4.1.4526.10.39.1.2.1.1.5	DisplayString	read-only	The Version string as reported in the most recent ISDP message. The zero-length string indicates that no Version field (TLV) was reported in the most recent ISDP message.
STR agentIsdpCacheDeviceId	1.3.6.1.4.1.4526.10.39.1.2.1.1.6	DisplayString	read-only	The Device-ID string as reported in the most recent ISDP message. The zero-length string indicates that no Device-ID field (TLV) was reported in the most recent ISDP message.
STR agentIsdpCacheDevicePort	1.3.6.1.4.1.4526.10.39.1.2.1.1.7	DisplayString	read-only	The Port-ID string as reported in the most recent ISDP message. This will typically be the value of the ifName object (e.g., 'Ethernet0'). The zero-length string indicates that no Port-ID field (TLV) was reported in the most recent ISDP message.
STR agentIsdpCachePlatform	1.3.6.1.4.1.4526.10.39.1.2.1.1.8	DisplayString	read-only	The Device's Hardware Platform as reported in the most recent ISDP message. The zero-length string indicates that no Platform field (TLV) was reported in the most recent ISDP message.
STR agentIsdpCacheCapabilities	1.3.6.1.4.1.4526.10.39.1.2.1.1.9	DisplayString	read-only	The Device's Functional Capabilities as reported in the most recent ISDP message. For latest set of specific values, see the latest version of the ISDP specification. The zero-length string indicates that no Capabilities field (TLV) was reported in the most recent ISDP message.
TIM agentIsdpCacheLastChange	1.3.6.1.4.1.4526.10.39.1.2.1.1.10	TimeStamp	read-only	Indicates the time when this cache entry was last changed. This object is initialised to the current time when the entry gets created and updated to the current time whenever the value of any (other) object instance in the corresponding row is modified.
STR agentIsdpCacheProtocolVersion	1.3.6.1.4.1.4526.10.39.1.2.1.1.11	DisplayString	read-only	The Device's version of ISDP protcol as reported in the most recent ISDP message.
INT agentIsdpCacheHoldtime	1.3.6.1.4.1.4526.10.39.1.2.1.1.12	INTEGER	read-only	The Device's ISDP Holdtime as reported in the most recent ISDP message.
agentIsdpInterface	1.3.6.1.4.1.4526.10.39.1.3
agentIsdpInterfaceTable	1.3.6.1.4.1.4526.10.39.1.3.1		not-accessible	The (conceptual) table containing the status of ISDP on the device's interfaces.
agentIsdpInterfaceEntry	1.3.6.1.4.1.4526.10.39.1.3.1.1		not-accessible	An entry (conceptual row) in the agentIsdpInterfaceTable, containing the status of ISDP on an interface.
I32 agentIsdpInterfaceIfIndex	1.3.6.1.4.1.4526.10.39.1.3.1.1.1	Integer32	not-accessible	The ifIndex value of the local interface. For 802.3 Repeaters on which the repeater ports do not have ifIndex values assigned, this value is a unique value for the port, and greater than any ifIndex value supported by the repeater; in this case, the specific port is indicated by corresponding values of agentIsdpInterfaceGroup and agentIsdpInterfacePort, where these values correspond to the group number and port number values of RFC 1516.
INT agentIsdpInterfaceEnable	1.3.6.1.4.1.4526.10.39.1.3.1.1.2	INTEGER	read-write	An indication of whether the Industry Standard Discovery Protocol is currently running on this interface. This variable has no effect when ISDP is disabled (agentIsdpGlobalRun = FALSE).

RFC description

Provides ISDP (Intelligent Switch Discovery Protocol) interface status management for FastPath switches.

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Download NETGEAR-ISDP-MIB