ENTERASYS-DVMRP-EXT-MIB

All MIBs › ENTERASYS-DVMRP-EXT-MIB

Organization: Enterasys Networks, Inc

Last Updated: 2009-02-27

Category: Protocol: DVMRP, Technology: Multicast, Vendor: Enterasys/Cabletron

Description: Enterasys Networks proprietary DVMRP extension MIB for configuring DVMRP multicast routing interface parameters.

Start monitoring vendor-neutral, standards-based MIB, any SNMPv3-capable network device (SNMP engine identity/boot/clock status) 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.

What Is ENTERASYS-DVMRP-EXT-MIB?

ENTERASYS-DVMRP-EXT-MIB is an Enterasys Networks (later Extreme/Cabletron lineage) enterprise MIB that extends the standard DVMRP-MIB with additional per-interface multicast routing configuration. It exposes configuration-oriented data such as per-interface DVMRP administrative and operational status, hello timers, report intervals, and stub-interface flags, along with a Tunnel Information Base (TIB) manager table. Rather than hardware health, this MIB is primarily used to monitor and verify the software/protocol status of DVMRP multicast routing on a switch or router interface, letting an operator confirm an interface is administratively enabled, operationally up, and exchanging hello/report messages on schedule. It explicitly depends on and supplements the IETF DVMRP-MIB, importing its interface indexing conventions rather than duplicating them. It is typically deployed on legacy Enterasys/Cabletron enterprise switches and routers running DVMRP-based IP multicast in campus or metro networks.

IPNetwork Monitor allows you to monitor SNMP objects defined in ENTERASYS-DVMRP-EXT-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

Enterasys/Cabletron enterprise switch or router

Monitoring Examples

An operator would poll etsysDvmrpExtIfTable/etsysDvmrpExtIfEntry, keyed by interface, to check etsysDvmrpExtIfAdminStatus against etsysDvmrpExtIfIfOperStatus — a mismatch (admin up, oper down) flags a multicast interface that has silently failed. Comparing etsysDvmrpExtIfHelloInterval and etsysDvmrpExtIfHelloHoldtime to observed hello traffic can reveal a misconfigured or flapping DVMRP neighbor relationship. The etsysDvmrpExtTibMgrTable exposes the DVMRP Tunnel Information Base manager instance, useful for confirming tunnel-based multicast routing state on a given device, and administrators typically start with an ENTERASYS-DVMRP-EXT-MIB download to load these objects into their MIB browser.

What Can Be Monitored

DVMRP interface admin status
DVMRP interface operational status
hello interval and holdtime
report interval
stub interface flag
point-to-point no-hellos setting

Imported Objects

From DVMRP-MIB

dvmrpInterfaceEntry

OBJECT-TYPE

From ENTERASYS-MIB-NAMES

etsysModules

OBJECT-IDENTITY

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

MODULE-IDENTITY
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

TEXTUAL-CONVENTION
TruthValue

How to Use in IPNetwork Monitor

Example using etsysDvmrpExtTibMgrSGStateStored OID:

Select an Enterasys Networks switch (legacy, later Extreme Networks)/router (DVMRP per-interface config) 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 etsysDvmrpExtTibMgrSGStateStored 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 {source, group} pairs for which the DVMRP TIB Manager is storing non-interface specific (S,G) state. 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 Gauge32-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
etsysDvmrpExtMIB	1.3.6.1.4.1.5624.1.2.69			This MIB module defines a portion of the SNMP MIB under the Enterasys Networks enterprise OID pertaining to the DVMRP configuration. This MIB was designed to be used in conjunction with the DVMRP-MIB [THALER1] for configuring the DVMRP parameters.
etsysDvmrpExtObjects	1.3.6.1.4.1.5624.1.2.69.1
etsysDvmrpExtGlobals	1.3.6.1.4.1.5624.1.2.69.1.1
etsysDvmrpExtTables	1.3.6.1.4.1.5624.1.2.69.1.2
etsysDvmrpExtIfTable	1.3.6.1.4.1.5624.1.2.69.1.2.1		not-accessible	This table provides addtional configuration objects that provide control for Enterasys DVMRP systems. This table augments the dvmrpInterfaceTable.
etsysDvmrpExtIfEntry	1.3.6.1.4.1.5624.1.2.69.1.2.1.1		not-accessible	An entry (conceptual row) in the etsysDvmrpExtIfTable.
INT etsysDvmrpExtIfAdminStatus	1.3.6.1.4.1.5624.1.2.69.1.2.1.1.1	INTEGER	read-create	The administrative state of DVMRP on this interface. When the status of this object is set to 'adminStatusDown', no DVMRP messages will be sent or received on this interface. The TIB state pertaining to this interface is cleared, resulting in the removal of the associated routes from the MFIB. When the status of this object is set to 'adminStatusUp', normal DVMRP operation will proceed, and multicast state is stored in the TIB when it is learned.
INT etsysDvmrpExtIfIfOperStatus	1.3.6.1.4.1.5624.1.2.69.1.2.1.1.2	INTEGER	read-only	The current operational state of DVMRP on this interface.
T/F etsysDvmrpExtIfStubInterface	1.3.6.1.4.1.5624.1.2.69.1.2.1.1.3	TruthValue	read-create	Indicates whether this interface is a stub interface in relation to DVMRP. If this object is set to 'true', no DVMRP packets are sent out this interface, and any received DVMRP packets are ignored. Setting this object to 'true' is a security measure for interfaces towards untrusted hosts. To communicate with other DVMRP routers using this interface, this object must remain set to 'false'. Changing the value of this object while the interface is operationally active MAY cause the interface to be deactivated and then reactivated.
T/F etsysDvmrpExtIfP2PNoHellos	1.3.6.1.4.1.5624.1.2.69.1.2.1.1.4	TruthValue	read-create	Indicates whether this interface is a point-to-point interface. If the value of this object is 'true', neighbors are not required to send DVMRP-Hello messages. This is provided for backward-compatibility with some older implementations that do not send DVMRP-Hellos on point-to-point links. Changing the value of this object while the interface is operationally active MAY cause the interface to be deactivated and then reactivated.
U32 etsysDvmrpExtIfHelloInterval	1.3.6.1.4.1.5624.1.2.69.1.2.1.1.5	Unsigned32	read-create	The transmit frequency of DVMRP Hello messages on this interface. A value of 0 represents an infinite interval and periodic DVMRP Hello messages SHOULD not be sent on this interface.
U32 etsysDvmrpExtIfHelloHoldtime	1.3.6.1.4.1.5624.1.2.69.1.2.1.1.6	Unsigned32	read-create	The amount of time a DVMRP neighbor should consider this router operationally up.
U32 etsysDvmrpExtIfReportInterval	1.3.6.1.4.1.5624.1.2.69.1.2.1.1.7	Unsigned32	read-create	The transmit frequency of DVMRP Report messages on this interface. A value of 0 represents an infinite interval and periodic DVMRP Report messages SHOULD not be sent on this interface.
etsysDvmrpExtTibMgrTable	1.3.6.1.4.1.5624.1.2.69.1.2.2		not-accessible	This table provides objects that manipulate the operation of the DVMRP Tree Information Base (TIB) Manager in order control the acceptable limits for the TIB.
etsysDvmrpExtTibMgrEntry	1.3.6.1.4.1.5624.1.2.69.1.2.2.1		not-accessible	An entry (conceptual row) in the etsysDvmrpExtTibMgrTable.
U32 etsysDvmrpExtTibMgrIndex	1.3.6.1.4.1.5624.1.2.69.1.2.2.1.1	Unsigned32	not-accessible	The DVMRP TIB Manager index.
U32 etsysDvmrpExtTibMgrKeepalivePeriod	1.3.6.1.4.1.5624.1.2.69.1.2.2.1.2	Unsigned32	read-write	The amount of time to keep (S,G) state alive in the absence of DVMRP (S,G) Join messages or (S,G) data packets. Note: Configuring different values for this object for different routers in the DVRMP domain may lead to incorrect protocol operation.
U32 etsysDvmrpExtTibMgrMetric	1.3.6.1.4.1.5624.1.2.69.1.2.2.1.3	Unsigned32	read-write	A global distance metric that is used to calculate distance vectors. An interface SHOULD inherit this value if its default metric (dvmrpInterfaceMetric) has not been modified.
U32 etsysDvmrpExtTibMgrSGStateLimit	1.3.6.1.4.1.5624.1.2.69.1.2.2.1.4	Unsigned32	read-write	The maximum number of {source, group} pairs for which the DVMRP TIB Manager is allowed to store non-interface specific (S,G) state. A value of zero means that there is no limit.
U32 etsysDvmrpExtTibMgrSGStateWarnThold	1.3.6.1.4.1.5624.1.2.69.1.2.2.1.5	Unsigned32	read-write	The DVMRP TIB Manager logs an exception if the number of {source, group} pairs for which it is storing non-interface specific (S,G) state exceeds this value. A value of zero means that there is no warning threshold.
G32 etsysDvmrpExtTibMgrSGStateStoredEx	1.3.6.1.4.1.5624.1.2.69.1.2.2.1.6	Gauge32	read-only	The number of {source, group} pairs for which the DVMRP TIB Manager is storing non-interface specific (S,G) state.
etsysDvmrpExtConformance	1.3.6.1.4.1.5624.1.2.69.2
etsysDvmrpExtGroups	1.3.6.1.4.1.5624.1.2.69.2.1
etsysDvmrpExtIfGroup	1.3.6.1.4.1.5624.1.2.69.2.1.1			This group defines interface controls for Enterasys DVMRP systems.
etsysDvmrpExtTibMgrGroup	1.3.6.1.4.1.5624.1.2.69.2.1.2			This group defines the Tree Information Base (TIB) manager objects for Enterasys DVMRP systems.
etsysDvmrpExtCompliances	1.3.6.1.4.1.5624.1.2.69.2.2
etsysDvmrpExtCompliance	1.3.6.1.4.1.5624.1.2.69.2.2.1			The compliance statement for devices that support etsysDvmrpExt.

RFC description

DVMRP multicast protocol configuration extensions for Enterasys Networks equipment.

Start monitoring Enterasys Networks switch (legacy, later Extreme Networks)/router (DVMRP per-interface config) 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 ENTERASYS-DVMRP-EXT-MIB