Juniper-IP-TUNNEL-MIB

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Organization: Juniper Networks, Inc.

Last Updated: 2003-09-29

Category: IP and Core Protocols, Vendor: Juniper

Description: Provides managed objects for GRE and IP-IP tunnel interface configuration and statistics on Juniper Networks E-series routers.

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What Is Juniper-IP-TUNNEL-MIB?

This is a Juniper Networks enterprise MIB module that manages IP tunnel interfaces, specifically GRE (Generic Routing Encapsulation) and IP-in-IP tunnels, on Juniper E-series routers. It exposes configuration data such as tunnel mode, source and destination addresses, MTU, checksum settings, and the virtual router association for each tunnel interface. Rather than hardware health, this MIB is primarily used to monitor the operational configuration state of tunnel interfaces—whether a tunnel's row status is active, its assigned MTU, and whether checksumming is enabled—so administrators can confirm tunnels are correctly provisioned and detect misconfiguration. It builds on standard IF-MIB conventions by assigning an ifIndex to each tunnel interface, tying tunnel management into the broader interfaces MIB framework. It is typically deployed in service-provider or enterprise networks running Juniper E-series edge routers that terminate GRE or IP-IP tunnels for VPN or traffic-engineering purposes. Network engineers evaluating or troubleshooting this functionality can download the Juniper-IP-TUNNEL-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in Juniper-IP-TUNNEL-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

Juniper Networks E-series routers

Monitoring Examples

An administrator would poll juniIpTunnelInterfaceTable/juniIpTunnelInterfaceEntry, indexed by juniIpTunnelIfIndex, to check juniIpTunnelMode, juniIpTunnelSource, and juniIpTunnelDestination for each configured tunnel. A mismatch between juniIpTunnelDestination and the expected remote endpoint, or a juniIpTunnelRowStatus other than active, would reveal a tunnel that failed to come up or was misconfigured. Watching juniIpTunnelMtu also helps catch fragmentation issues when tunnel MTU doesn't match the underlying path MTU.

What Can Be Monitored

tunnel interface mode (GRE/IP-IP)
tunnel source and destination addresses
tunnel MTU
tunnel checksum setting
tunnel row status (active/configuring)
virtual router assignment

Imported Objects

From IF-MIB

InterfaceIndex

From Juniper-MIBs

juniMibs

MODULE-IDENTITY

From Juniper-TC

JuniName
JuniNextIfIndex

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Integer32
IpAddress
MODULE-IDENTITY
OBJECT-TYPE

From SNMPv2-TC

DisplayString
RowStatus
TruthValue

OIDs

OID symbolic	OID numeric	Type	Access	Description
juniIpTunnelMIB	1.3.6.1.4.1.4874.2.2.51			The IP Tunnel MIB for the Juniper Networks enterprise.
juniIpTunnelInterfaceObjects	1.3.6.1.4.1.4874.2.2.51.1
JUN juniIpTunnelNextIfIndex	1.3.6.1.4.1.4874.2.2.51.1.1	JuniNextIfIndex	read-only	Coordinate ifIndex value allocation for entries in juniIpTunnelIfTable. A GET of this object returns the next available ifIndex value to be used to create an entry in the associated interface table; or zero, if no valid ifIndex value is available. This object also returns a value of zero when it is the lexicographic successor of a varbind presented in an SNMP GETNEXT or GETBULK request, for which circumstance it is assumed that ifIndex allocation is unintended. Successive GETs will typically return different values, thus avoiding collisions among cooperating management clients seeking to create table entries simultaneously.
juniIpTunnelInterfaceTable	1.3.6.1.4.1.4874.2.2.51.1.2		not-accessible	This table contains entries of IP Tunnel interfaces.
juniIpTunnelInterfaceEntry	1.3.6.1.4.1.4874.2.2.51.1.2.1		not-accessible	Each entry describes the characteristics of a single IP Tunnel interface. Creating/deleting entries in this table causes corresponding entries for be created/deleted in ifTable/ifXTable/juniIfTable.
NUM juniIpTunnelIfIndex	1.3.6.1.4.1.4874.2.2.51.1.2.1.1	InterfaceIndex	not-accessible	The ifIndex of the IP tunnel interface. When creating entries in this table, suitable values for this object are determined by reading juniIpTunnelNextIfIndex.
STR juniIpTunnelName	1.3.6.1.4.1.4874.2.2.51.1.2.1.2	DisplayString	read-create	The administratively assigned name for this IP Tunnel interface.
INT juniIpTunnelMode	1.3.6.1.4.1.4874.2.2.51.1.2.1.3	INTEGER	read-create	The configured mode for this IP Tunnel interface.
JUN juniIpTunnelVirtualRouter	1.3.6.1.4.1.4874.2.2.51.1.2.1.4	JuniName	read-create	The transport virtual router associated with this IP tunnel interface. This object need not be set when creating row entries. Note that the default when this object is not specified is the router associated with the agent acting on the management request.
T/F juniIpTunnelChecksum	1.3.6.1.4.1.4874.2.2.51.1.2.1.5	TruthValue	read-create	The Tunnel checksum configuration for this entry. Setting this object to true(1) will enabled end-to-end checksumming and will cause the system to drop packets with bad checksums received on this interface. Setting this object to false(2) will disable this feature. Note: This configuration object is not supported for DVMRP tunnels.
I32 juniIpTunnelMtu	1.3.6.1.4.1.4874.2.2.51.1.2.1.6	Integer32	read-create	The tunnel MTU.
IP juniIpTunnelDestination	1.3.6.1.4.1.4874.2.2.51.1.2.1.7	IpAddress	read-create	The tunnel destination IP address.
IP juniIpTunnelSource	1.3.6.1.4.1.4874.2.2.51.1.2.1.8	IpAddress	read-create	The tunnel source IP address.
ROW juniIpTunnelRowStatus	1.3.6.1.4.1.4874.2.2.51.1.2.1.9	RowStatus	read-create	Controls creation/deletion of entries in this table according to the RowStatus textual convention, constrained to support the following values only: createAndGo destroy To create an entry in this table, the following entry objects MUST be explicitly configured: juniIpTunnelIfRowStatus juniIpTunnelName juniIpTunnelMode In addition, when creating an entry the following condition must hold: A value for juniIpTunnelIfIndex must have been determined previously, typically by reading juniIpTunnelNextIfIndex. Once created, the following objects may not be modified: juniIpTunnelName juniIpTunnelMode juniIpTunnelVirtualRouter A corresponding entry in ifTable/ifXTable/juniIfTable is created/ destroyed as a result of creating/destroying an entry in this table.
T/F juniIpTunnelSequenceNumbers	1.3.6.1.4.1.4874.2.2.51.1.2.1.10	TruthValue	read-create	The tunnel sequence number configuration for this entry. Setting this object to true(1) will enable sequence number generation. Setting this object to false(2) will disable this feature. Note: This configuration object is not supported for DVMRP tunnels.
juniIpTunnelConformance	1.3.6.1.4.1.4874.2.2.51.2
juniIpTunnelCompliances	1.3.6.1.4.1.4874.2.2.51.2.1
juniIpTunnnelCompliance	1.3.6.1.4.1.4874.2.2.51.2.1.1			Obsolete compliance statement for entities that implement the Juniper IP Tunnel MIB. This compliance statement became obsolete when juniIpTunnelSequenceNumbers was added.
juniIpTunnnelCompliance2	1.3.6.1.4.1.4874.2.2.51.2.1.2			The compliance statement for entities that implement the Juniper IP Tunnel MIB.
juniIpTunnelGroups	1.3.6.1.4.1.4874.2.2.51.2.2
juniIpTunnelInterfaceGroup	1.3.6.1.4.1.4874.2.2.51.2.2.1			Obsolete collection of objects for managing IP Tunnel capabilities in a Juniper product. This group became obsolete when juniIpTunnelSequenceNumbers was added.
juniIpTunnelInterfaceGroup2	1.3.6.1.4.1.4874.2.2.51.2.2.2			A collection of objects for managing IP Tunnel capabilities in a Juniper product.

RFC description

Manages IP tunnel interface creation and configuration including encapsulation and sequence numbers.

Start monitoring Juniper Networks E-series router (GRE/IP-in-IP tunnel interfaces) 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 Juniper-IP-TUNNEL-MIB

What Is Juniper-IP-TUNNEL-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description