IPFRR-MIB

All MIBs › IPFRR-MIB

Organization: draft-ietf-ipfrr-ip-mib-00.txt

Last Updated: 2005-02-18

Category: IP and Core Protocols, Routing Protocols, Standard: IETF, Technology: High Availability

Description: IETF IP Fast ReRoute (IPFRR) MIB providing SNMP objects for monitoring loop-free alternate and repair paths for fast IP recovery.

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What Is IPFRR-MIB?

IPFRR-MIB is a vendor-neutral IETF draft standard MIB for managing IP Fast Reroute (IP-FRR), a mechanism that lets routers precompute loop-free alternate (LFA) backup paths so traffic can be rerouted within milliseconds after a link or node failure, before the routing protocol reconverges. It exposes configuration and state objects describing which interfaces/prefixes have backup paths computed and available. Its monitoring value is primarily software/protocol-state: confirming that fast-reroute protection is actually active and that backup paths exist where expected, which is critical for validating resiliency claims on a router rather than checking any physical component. As an IP routing extension it depends on and is used alongside the base IP-MIB/routing MIBs (and typically OSPF/IS-IS MIBs) for full context. It would be deployed on carrier or enterprise core/edge routers running IP-FRR-capable routing protocols to verify sub-second failover protection is in place. Engineers implementing or auditing this functionality typically reference the IPFRR-MIB RFC/standard documentation for the authoritative specification.

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

vendor-neutral, standards-based MIB, not tied to a specific manufacturer
IP routers supporting Fast Reroute

Monitoring Examples

No sample object names were provided in the source extract for this module, so specific table or object identifiers cannot be responsibly invented. Based on the module description (a draft IETF MIB for IP Fast-Reroute), a typical scenario would be polling per-prefix or per-interface objects to confirm a loop-free alternate path is provisioned and to alert if protection coverage drops after a topology change. Without concrete object names, further detail would be speculative.

Imported Objects

From IF-MIB

InterfaceIndex

From INET-ADDRESS-MIB

InetAddress
InetAddressType

From IP-FORWARD-MIB

inetCidrRouteDest	OBJECT-TYPE
inetCidrRouteDestType	OBJECT-TYPE
inetCidrRouteNextHop	OBJECT-TYPE
inetCidrRouteNextHopType	OBJECT-TYPE
inetCidrRoutePfxLen	OBJECT-TYPE
inetCidrRoutePolicy	OBJECT-TYPE

From IP-MIB

ip	OBJECT-IDENTITY

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Gauge32
Integer32
MODULE-IDENTITY
OBJECT-TYPE

From SNMPv2-TC

RowStatus

OIDs

OID symbolic	OID numeric	Type	Access	Description
ipFrrMIB	1.3.6.1.2.1.4.999			IP MIB module for management of IP Fast-Reroute. Copyright (C) The Internet Society (date). This version of this MIB module is part of draft-ietf-rtgwg-ipfrr-ip-mib-00.txt
ipFrrMIBObjects	1.3.6.1.2.1.4.999.1
ipFrrProtectStats	1.3.6.1.2.1.4.999.1.1
G32 ipFrrTotalRoutes	1.3.6.1.2.1.4.999.1.1.1	Gauge32	read-only	The number of valid routes known by this entity.
G32 ipFrrUnprotectedRoutes	1.3.6.1.2.1.4.999.1.1.2	Gauge32	read-only	The number of valid routes known by this entity which do not have an alternate next-hop associated with any primary next-hop.
G32 ipFrrProtectedRoutes	1.3.6.1.2.1.4.999.1.1.3	Gauge32	read-only	The number of routes known by this entity which have at least one alternate next-hop.
G32 ipFrrLinkProtectedRoutes	1.3.6.1.2.1.4.999.1.1.4	Gauge32	read-only	The number of routes known by this entity for which all alternate next-hops provide link protection for their associated primary next-hops.
G32 ipFrrNodeProtectedRoutes	1.3.6.1.2.1.4.999.1.1.5	Gauge32	read-only	The number of routes known by this entity for which all alternate next-hops provide node protection for their associated primary next-hops.
ipFrrAltTable	1.3.6.1.2.1.4.999.1.2		not-accessible	This entity's IP Fast Reroute Alternates table.
ipFrrAltEntry	1.3.6.1.2.1.4.999.1.2.1		not-accessible	An entry containing information on a particular route, one of its particular (primary) next-hops and one of the associated alternate next-hops. Implementers need to be aware that if the total number of elements (octets or sub-identifiers) in inetCidrRouteDest, inetCidrRoutePolicy, inetCidrRouteNextHop, and ipFrrAltNextHop exceeds 107 then OIDs of column instances in this table will have more than 128 sub-identifiers and cannot be accessed using SNMPv1, SNMPv2c, or SNMPv3.
IPt ipFrrAltNextHopType	1.3.6.1.2.1.4.999.1.2.1.1	InetAddressType	not-accessible	The type of the ipFrrNextHop address, as defined in the InetAddress MIB. Only those address types that may appear in an actual routing table are allowed as values of this object.
IP ipFrrAltNextHop	1.3.6.1.2.1.4.999.1.2.1.2	InetAddress	not-accessible	The address of the next system along the alternate route. The type of this address is determined by the value of the ipFrrAltNextHopType.
NUM ipFrrAltIfIndex	1.3.6.1.2.1.4.999.1.2.1.3	InterfaceIndex	read-create	The ifIndex value which identifies the local interface through which the next hop of this alternate route should be reached.
INT ipFrrAltType	1.3.6.1.2.1.4.999.1.2.1.4	INTEGER	read-create	The type of alternate which is provided by the alternate next-hop. The supported types are as follows: equalCost : The alternate next-hop is another primary next-hop. loopFree : The shortest route to the destination IP address from the alternate next-hop does not traverse this system. See draft-ietf-rtgwg-ipfrr-spec-base-04. uTurn : The alternate next system, which is indicated by the alternate next-hop, has itself a primary path that traverses this system but also has an alternate next-hop for this route that does not traverse this system. See draft-atlas-ip-local-protect-uturn-02. other : The mechanism by which the alternate next-hop can be used is not specified.
BIT ipFrrAltProtectionAvailable	1.3.6.1.2.1.4.999.1.2.1.5	Bits	read-create	This object specifies the scope of protection for which this alternate next-hop can provide failure protection. The alternate next-hop should provide one or more of node-protection and link-protection. If the protection provided by the alternate next-hop is unknown, then only unknownProtection should be specified. Specifying uknownProtection with any other type of protection is not supported.
I32 ipFrrAltMetric1	1.3.6.1.2.1.4.999.1.2.1.6	Integer32	read-create	This is the primary routing metric for this alternate path to the destination IP address. If the alternate path metric is unknown, the value should be set to -1.
ROW ipFrrAltStatus	1.3.6.1.2.1.4.999.1.2.1.7	RowStatus	read-create	The row status variable, used according to row installation and removal conventions.
ipFrrNoAltTable	1.3.6.1.2.1.4.999.1.3		not-accessible	This entity's IP Fast Reroute Unprotected Routes table.
ipFrrNoAltEntry	1.3.6.1.2.1.4.999.1.3.1		not-accessible	An entry containing the reason why a route does not have an alternate next-hop. The existence of an entry for a route indicates that there is no alternate next-hop.
INT ipFrrNoAltCause	1.3.6.1.2.1.4.999.1.3.1.1	INTEGER	read-only	For valid routes without an alternate next-hop, this object enumerates the reason why no protection is available. The possibilities are as follows. ipFrrUnavailable : The supported IP Fast-Reroute mechanisms could not find a safe alternate next-hop. localAddress : The route represents a local address. This system is the destination so no alternate path is possible or necessary. ipFrrDisabled : Finding of alternate next-hops is operationally disabled. ipFrrUturnDisabled : Finding of u-turn alternate next-hops is operationally disabled. No loop-free alternate could be found. See draft-atlas-ip-local-protect-uturn-02 other : The reason is unknown or different from those specifically enumerated possible causes.
ipFrrMIBConformance	1.3.6.1.2.1.4.999.2
ipFrrMIBCompliances	1.3.6.1.2.1.4.999.2.1
ipFrrMIBCompliance	1.3.6.1.2.1.4.999.2.1.1			Minimum requirements to state conformity to this MIB. Supporting only IP v4 addresses This is deprecated in favor of ipFrrMIBInetCompliance There are a number of INDEX objects that cannot be represented in the form of OBJECT clauses in SMIv2, but for which there are compliance requirements, expressed in OBJECT clause form in this description: OBJECT inetCidrRouteDestType SYNTAX InetAddressType { ipv4(1), ipv4z(3) } MIN-ACCESS read-only DESCRIPTION A (deprecated) complying implementation at this level is required to support IPv4 addresses only. This compliance level is defined so an implementation only needs to support the addresses it actually supports on the device. OBJECT inetCidrRouteNextHopType SYNTAX InetAddressType { ipv4(1), ipv4z(3) } MIN-ACCESS read-only DESCRIPTION A (deprecated) complying implementation at this level is required to support IPv4 addresses only. This compliance level is defined so an implementation only needs to support the addresses it actually supports on the device. OBJECT ipFrrAltNextHopType SYNTAX InetAddressType { ipv4(1), ipv4z(3) } MIN-ACCESS read-only DESCRIPTION A (deprecated) complying implementation at this level is required to support IPv4 addresses only. This compliance level is defined so an implementation only needs to support the addresses it actually supports on the device.
ipFrrMIBInetCompliance	1.3.6.1.2.1.4.999.2.1.2			Full conformity to this MIB.
ipFrrReadOnlyCompliance	1.3.6.1.2.1.4.999.2.1.3			When this MIB is implemented without support for read-create (i.e. in read-only mode), then that implementation can claim read-only compliance. In that case, ipFrrAlt group can be monitored but cannot be configured with this MIB.
ipFrrMIBGroups	1.3.6.1.2.1.4.999.2.2
ipFrrBasicGroup	1.3.6.1.2.1.4.999.2.2.1			The entire collection of objects defined in this MIB for management of IP Fast Reroute .

RFC description

IP Fast-Reroute MIB for managing alternate paths and fast recovery mechanisms in IP routing networks.

Start monitoring Vendor-neutral IETF draft standard (IP routers supporting Fast Reroute) 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 IPFRR-MIB

What Is IPFRR-MIB?

Supported Devices

Monitoring Examples

This MIB depends on

Related MIBs

RFC description