| Routing Area Working Group | A. Atlas |
| Internet-Draft | Juniper Networks |
| Intended status: Standards Track | K. Koushik |
| Expires: February 8, 2016 | Cisco Systems |
| S. Litkowski | |
| Orange | |
| August 7, 2015 |
IP MIB for IP Fast-Reroute
draft-ietf-rtgwg-ipfrr-ip-mib-07
This draft defines a portion of the Management Information Base (MIB) for use with network management protocols in the Internet community. In particular, it describes managed objects relevant for IP routes using IP Fast-Reroute [RFC5714]
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in [RFC2119].
This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet-Drafts is at http://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress."
This Internet-Draft will expire on February 8, 2016.
Copyright (c) 2015 IETF Trust and the persons identified as the document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License.
This document defines a portion of the Management Information Base (MIB) for use with network management protocols in the Internet community. In particular, it defines the managed objects used for IP routes and interfaces in relation to IP Fast-Reroute. This document uses terminology from [RFC5714] and [RFC5286].
Current work is underway to define mechanisms for determining alternate paths for traffic to use when the original path becomes unavailable due to a local failure. The alternate next-hops can be computed in the context of any IGP.
There are certain configuration attributes for IP Fast-Reroute that should be configured to enable IP Fast Reroute in the context of the IGP. These configuration attributes of IP Fast-Reroute are not covered by this MIB module. Examples include whether IP Fast-Reroute is enabled on a network region (i.e. an OSPF area or IS-IS level) and the desired local hold-down timer [RFC5286], whose proper value is dependent upon the size of the network region.
It is possible for traffic other than IP to depend upon and use the alternate next-hops computed by IP Fast-Reroute. An example would be MPLS traffic whose path is configured via LDP [RFC5036]. The additional details (for example, outgoing MPLS label) pertaining to alternate next-hops that are required by such traffic are not covered by this MIB module.
An IP route may be reachable via multiple primary next-hops which provide equal-cost paths. Where IP Fast-Reroute is enabled, each primary next-hop will be protected by one or more alternate next- hops. Such an alternate next-hop may itself be a primary next-hop.
For a detailed overview of the documents that describe the current Internet-Standard Management Framework, please refer to section 7 of [RFC3410].
Managed objects are accessed via a virtual information store, termed the Management Information Base or MIB. MIB objects are generally accessed through the Simple Network Management Protocol (SNMP). Objects in the MIB are defined using the mechanisms defined in the Structure of Management Information (SMI). This memo specifies a MIB module that is compliant to the SMIv2, which is described in STD 58, [RFC2578], STD 58, [RFC2579] and STD 58, [RFC2580].
The global objects in this group provide summary information related to protection for all IP routes. The information available includes counts of all routes, of all protected routes, of all unprotected routes, of all routes which are protected against a link failure, and of all routes which are protected against a node failure.
The ipFrrInstanceTable provides information about configuration of IP FRR instantiations on a node. A single node may have multiple instances of IP FRR using different algorithms or protocols. ipFrrInstances cannot be created through the MIB.
The ipFrrIfTable provides information about configuration of interfaces for IPFRR. Entries can be created to activate IPFRR on a particular interface or setting the candidate properties.
The ipFrrProtectStatsTable complements the ipFrrProtectStats group by providing statistics per IP FRR instance.
The ipFrrAltTable extends the inetCidrRouteTable [RFC4292] to provide information about each alternate next-hop associated with a primary next-hop used by a route.
The ipFrrNoAltTable extends the inetCidrRouteTable [RFC4292] to provide information about the routes which do not have an alternate next-hop associated with any of the route's primary next-hop. The entry provides an explanation for the lack of protection.
IPFRR-MIB DEFINITIONS ::= BEGIN
IMPORTS
MODULE-IDENTITY,
OBJECT-TYPE,
Gauge32,
Integer32 FROM SNMPv2-SMI -- [RFC2578]
RowStatus
FROM SNMPv2-TC -- [RFC2579]
MODULE-COMPLIANCE,
OBJECT-GROUP FROM SNMPv2-CONF -- [RFC2580]
InetAddressType,
InetAddress FROM INET-ADDRESS-MIB -- [RFC4001]
ifIndex, InterfaceIndex FROM IF-MIB -- [RFC2863]
ip FROM IP-MIB -- [RFC4293]
inetCidrRouteDestType,
inetCidrRouteDest,
inetCidrRoutePfxLen,
inetCidrRoutePolicy,
inetCidrRouteNextHopType,
inetCidrRouteNextHop FROM IP-FORWARD-MIB
-- [RFC4292]
IANAipRouteProtocol FROM IANA-RTPROTO-MIB
;
ipFrrMIB MODULE-IDENTITY
LAST-UPDATED "201508040000Z" -- Aug 04, 2015
ORGANIZATION "draft-ietf-ipfrr-ip-mib-06.txt"
CONTACT-INFO
"
A S Kiran Koushik
Cisco Systems Inc.
EMail: kkoushik@cisco.com
Alia Atlas
Juniper Networks
Email: akatlas@juniper.net
Stephane Litkowski
Orange Business Service
Email: stephane.litkowski@orange.com
"
DESCRIPTION
"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-07.txt"
REVISION "201508040000Z" -- Aug 04, 2015
DESCRIPTION
"Fixing some syntax issues
Moved ipFrrInstanceTable to readonly
Moved ipFrrAltTable to readonly
Modified Readonly conformance
Deleting ipFrrInstanceRowStatus
Deleting ipFrrAltStatus
Added notProtect to ipFrrIfProtectionType
"
REVISION "201406141200Z" -- Jun 14, 2014
DESCRIPTION
"draft-ietf-rtgwg-ipfrr-ip-mib-03.txt"
REVISION "201406131200Z" -- Jun 13, 2014
DESCRIPTION
"Add ipFrrTunnelType in ipFrrAltEntry
Modify ipFrrAltType"
REVISION "201405261200Z" -- May 26, 2014
DESCRIPTION
"Add ipFrrInstanceTable.
Add ipFrrIfTable.
ipFrrProtectStatsTable complements ipFrrProtectStats to have statistics per instance.
Add ipFrrAltMetric2, ipFrrAltMetric3, ipFrrAltBest, ipFrrAltNonBestReason to ipFrrAltEntry.
Add integer values to ipFrrAltType.
Add integer values to ipFrrAltProtectionAvailable.
Changed attachment of ipFrrAltStatus in ipFrrAltEntry.
Added IPv6 objects in ipFrrProtectStats."
REVISION "201203131200Z" -- Mar 13, 2012
DESCRIPTION
"Editorial changes. Added new type to ipFrrAltType."
REVISION "200502181200Z" -- February 18, 2005
DESCRIPTION
"Add Set operations on ipFrrAltTable"
REVISION "200502131200Z" -- February 13, 2005
DESCRIPTION
"Initial version."
::= { ip 50 } -- To be assigned by IANA
-- Top level components of this MIB module.
ipFrrMIBObjects OBJECT IDENTIFIER ::= { ipFrrMIB 1 }
ipFrrProtectStats OBJECT IDENTIFIER ::= { ipFrrMIBObjects 1 }
-- the IP FRR MIB-Group
-- A collection of objects providing summarized information
-- about the protection availability and type of alternate paths
-- provided by IP Fast-Reroute mechanisms.
ipFrrTotalRoutes OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of IPv4 valid routes known by this entity."
::= { ipFrrProtectStats 1 }
ipFrrUnprotectedRoutes OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of IPv4 valid routes known by this entity
which do not have an alternate next-hop associated
with any primary next-hop."
::= { ipFrrProtectStats 2 }
ipFrrProtectedRoutes OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of IPv4 routes known by this entity
which have at least one alternate next-hop."
::= { ipFrrProtectStats 3 }
ipFrrLinkProtectedRoutes OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of IPv4 routes known by this entity
for which all alternate next-hops provide link
protection for their associated primary next-hops."
::= { ipFrrProtectStats 4 }
ipFrrNodeProtectedRoutes OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of IPv4 routes known by this entity
for which all alternate next-hops provide node
protection for their associated primary next-hops."
::= { ipFrrProtectStats 5 }
ipv6FrrTotalRoutes OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of IPv6 valid routes known by this entity."
::= { ipFrrProtectStats 6 }
ipv6FrrUnprotectedRoutes OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of IPv6 valid routes known by this entity
which do not have an alternate next-hop associated
with any primary next-hop."
::= { ipFrrProtectStats 7 }
ipv6FrrProtectedRoutes OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of IPv6 routes known by this entity
which have at least one alternate next-hop."
::= { ipFrrProtectStats 8 }
ipv6FrrLinkProtectedRoutes OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of IPv6 routes known by this entity
for which all alternate next-hops provide link
protection for their associated primary next-hops."
::= { ipFrrProtectStats 9 }
ipv6FrrNodeProtectedRoutes OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of IPv6 routes known by this entity
for which all alternate next-hops provide node
protection for their associated primary next-hops."
::= { ipFrrProtectStats 10 }
-- the IP FRR instance MIB-group
--
-- The ipFrrInstanceTable provides detail on current IPFRR
-- instances activated on the node
ipFrrInstanceTable OBJECT-TYPE
SYNTAX SEQUENCE OF IpFrrInstanceEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This entity's IP Fast Reroute Instance table."
::= { ipFrrMIBObjects 4 }
ipFrrInstanceEntry OBJECT-TYPE
SYNTAX IpFrrInstanceEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry containing information on a particular
IP FRR instance on the node."
INDEX { ipFrrInstanceId
}
::= { ipFrrInstanceTable 1 }
IpFrrInstanceEntry ::= SEQUENCE {
ipFrrInstanceId INTEGER,
ipFrrInstanceProtocol IANAipRouteProtocol,
ipFrrInstanceAlgorithm Integer32,
ipFrrInstancePerPrefixComputation INTEGER
}
ipFrrInstanceId OBJECT-TYPE
SYNTAX Integer32 (1..255)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This object specifies an identificator a of particular IPFRR instance. "
::= { ipFrrInstanceEntry 1 }
ipFrrInstanceProtocol OBJECT-TYPE
SYNTAX IANAipRouteProtocol
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object specifies the protocol used by the IPFRR instance."
::= { ipFrrInstanceEntry 2 }
ipFrrInstanceAlgorithm OBJECT-TYPE
SYNTAX INTEGER {
loopFree(1),
loopFreeRemote(2),
loopFreeTI(3),
mrt(4)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object specifies the algorithm used by the IPFRR instance."
::= { ipFrrInstanceEntry 3 }
ipFrrInstancePerPrefixComputation OBJECT-TYPE
SYNTAX INTEGER {
false(0),
true(1)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object specifies if per prefix computation is used."
::= { ipFrrInstanceEntry 4 }
-- the IP FRR Interface MIB-Group
--
-- ipFrrIfTable provides information on configuration
-- of interfaces for IPFRR
ipFrrIfTable OBJECT-TYPE
SYNTAX SEQUENCE OF IpFrrIfEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This entity's IP Fast Reroute Alternates Interface configuration table."
::= { ipFrrMIBObjects 5 }
ipFrrIfEntry OBJECT-TYPE
SYNTAX IpFrrIfEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry containing information on a particular instance of an IPFRR interface."
INDEX { ipFrrInstanceId,
ifIndex
}
::= { ipFrrIfTable 1 }
IpFrrIfEntry ::= SEQUENCE {
ipFrrIfProtectionType BITS,
ipFrrIfCandidate INTEGER,
ipFrrIfRowStatus RowStatus
}
ipFrrIfProtectionType OBJECT-TYPE
SYNTAX BITS {
nodeProtect(0),
linkProtect(1),
nodelinkProtect(2),
notProtect(3)
}
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This object specifies the scope of protection requested for the protection of the destinations.
nodeProtect means node protection only compared to nodelinkProtect which means node protection
if available and link protection if not available. "
::= { ipFrrIfEntry 1 }
ipFrrIfCandidate OBJECT-TYPE
SYNTAX INTEGER {
false (0),
true (1)
}
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This object specifies the scope of protection requested for the protection of the destinations.
nodeProtect means node protection only compared to nodelinkProtect which means node protection
if available and link protection if not available. "
DEFVAL {1}
::= { ipFrrIfEntry 2 }
ipFrrIfRowStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"."
::= { ipFrrIfEntry 3 }
-- the IP FRR Stats MIB-Group
--
-- ipFrrProtectStatsTable provides provides
-- protection availability and type of alternate paths
-- provided by IP Fast-Reroute mechanisms per IPFRR instance.
ipFrrProtectStatsTable OBJECT-TYPE
SYNTAX SEQUENCE OF IpFrrProtectStatsEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This entity's IP Fast Reroute Alternates statistics table."
::= { ipFrrMIBObjects 6 }
ipFrrProtectStatsEntry OBJECT-TYPE
SYNTAX IpFrrProtectStatsEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry containing information on a particular instance of IPFRR.
."
INDEX { ipFrrInstanceId
}
::= { ipFrrProtectStatsTable 1 }
IpFrrProtectStatsEntry ::= SEQUENCE {
ipFrrStatsTotalRoutes Gauge32,
ipFrrStatsUnprotectedRoutes Gauge32,
ipFrrStatsProtectedRoutes Gauge32,
ipFrrStatsLinkProtectedRoutes Gauge32,
ipFrrStatsNodeProtectedRoutes Gauge32,
ipv6FrrStatsTotalRoutes Gauge32,
ipv6FrrStatsUnprotectedRoutes Gauge32,
ipv6FrrStatsProtectedRoutes Gauge32,
ipv6FrrStatsLinkProtectedRoutes Gauge32,
ipv6FrrStatsNodeProtectedRoutes Gauge32
}
ipFrrStatsTotalRoutes OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of valid routes known by this entity."
::= { ipFrrProtectStatsEntry 1 }
ipFrrStatsUnprotectedRoutes OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of valid routes known by this entity
which do not have an alternate next-hop associated
with any primary next-hop."
::= { ipFrrProtectStatsEntry 2 }
ipFrrStatsProtectedRoutes OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of routes known by this entity
which have at least one alternate next-hop."
::= { ipFrrProtectStatsEntry 3 }
ipFrrStatsLinkProtectedRoutes OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of routes known by this entity
for which all alternate next-hops provide link
protection for their associated primary next-hops."
::= { ipFrrProtectStatsEntry 4 }
ipFrrStatsNodeProtectedRoutes OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of routes known by this entity
for which all alternate next-hops provide node
protection for their associated primary next-hops."
::= { ipFrrProtectStatsEntry 5 }
ipv6FrrStatsTotalRoutes OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of valid IPv6 routes known by this entity."
::= { ipFrrProtectStatsEntry 6 }
ipv6FrrStatsUnprotectedRoutes OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of valid IPv6 routes known by this entity
which do not have an alternate next-hop associated
with any primary next-hop."
::= { ipFrrProtectStatsEntry 7 }
ipv6FrrStatsProtectedRoutes OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of IPv6 routes known by this entity
which have at least one alternate next-hop."
::= { ipFrrProtectStatsEntry 8 }
ipv6FrrStatsLinkProtectedRoutes OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of IPv6 routes known by this entity
for which all alternate next-hops provide link
protection for their associated primary next-hops."
::= { ipFrrProtectStatsEntry 9 }
ipv6FrrStatsNodeProtectedRoutes OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of IPv6 routes known by this entity
for which all alternate next-hops provide node
protection for their associated primary next-hops."
::= { ipFrrProtectStatsEntry 10 }
-- the IP FRR Alternate MIB-Group
--
-- The ipFrrAltTable extends the inetCidrRouteTable to indicate
-- the alternate next-hop(s) associated with each primary
-- next-hop. The additional indices (ipFrrAltNextHopType and
-- ipFrrAltNextHop ) allow for multiple alternate paths for a
-- given primary next-hop.
ipFrrAltTable OBJECT-TYPE
SYNTAX SEQUENCE OF IpFrrAltEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This entity's IP Fast Reroute Alternates table."
::= { ipFrrMIBObjects 2 }
ipFrrAltEntry OBJECT-TYPE
SYNTAX IpFrrAltEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"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."
INDEX { inetCidrRouteDestType,
inetCidrRouteDest,
inetCidrRoutePfxLen,
inetCidrRoutePolicy,
inetCidrRouteNextHopType,
inetCidrRouteNextHop,
ipFrrAltNextHopType,
ipFrrAltNextHop
}
::= { ipFrrAltTable 1 }
IpFrrAltEntry ::= SEQUENCE {
ipFrrAltNextHopType InetAddressType,
ipFrrAltNextHop InetAddress,
ipFrrAltIfIndex InterfaceIndex,
ipFrrAltType INTEGER,
ipFrrTunnelType INTEGER,
ipFrrAltProtectionAvailable BITS,
ipFrrAltMetric1 Integer32,
ipFrrAltMetric2 Integer32,
ipFrrAltMetric3 Integer32,
ipFrrAltBest INTEGER,
ipFrrAltNonBestReason OCTET STRING
}
ipFrrAltNextHopType OBJECT-TYPE
SYNTAX InetAddressType
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"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."
REFERENCE "RFC 4001"
::= { ipFrrAltEntry 1 }
ipFrrAltNextHop OBJECT-TYPE
SYNTAX InetAddress
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The address of the next system along the alternate
route.
The type of this address is determined by the value
of the ipFrrAltNextHopType."
::= { ipFrrAltEntry 2 }
ipFrrAltIfIndex OBJECT-TYPE
SYNTAX InterfaceIndex
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The ifIndex value which identifies the local
interface through which the next hop of this
alternate route should be reached."
::= { ipFrrAltEntry 3 }
ipFrrAltType OBJECT-TYPE
SYNTAX INTEGER {
other (1), -- type not defined
equalCost (2), -- primary path
loopFree (3), -- loop free alternate
loopFreeRemote (4), -- remote loop free alternate
loopFreeNH (5), -- loop free alternate using a configured tunnel toward the nexthop
loopFreeNNH (6), -- loop free alternate using a configured tunnel toward the nextnexthop
loopFreeTI (7), -- loop free alternate using topology independent algorithm
mrt (8) -- Maximally Redundant Trees
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"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.
loopFreeConnected : loop free alternate (LFA as described in RFC5286)
loopFreeRemote : remote LFA (as described in draft-ietf-rtgwg-remote-lfa)
loopFreeNH : loop free alternate using a configured tunnel toward the nexthop (link protection only)
loopFreeNNH : loop free alternate using a configured tunnel toward the nextnexthop (node protection)
loopFreeTI : loop free alternate using topology independent algorithm
other : The mechanism by which the alternate next-hop
can be used is not specified.
MRT : Maximally Redundant Trees, where each
destination has two MRTs associated with it.
These two trees are referred as blue and red
MRTs.
See draft-ietf-rtgwg-mrt-frr-architecture-00.
"
::= { ipFrrAltEntry 4 }
ipFrrTunnelType OBJECT-TYPE
SYNTAX INTEGER {
none (1), -- No tunnel used
other (2), -- type not defined
ldp (3), -- LDP tunnel
ip (4), -- IP based tunnel (GRE, IPIP, L2TP ...)
srmpls (5), -- SPRING tunnel using MPLS dataplane
sripv6 (6), -- SPRING tunnel using IPv6 dataplane
rsvpte (7), -- RSVP-TE tunnel
mtldp (8) -- LDP tunnel on another topology
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The type of tunnel used to reach the alternate.
The supported types are as follows:
none : No tunnel used
ldp : use LDP tunnel to reach the alternate (typically the case of rLFA)
ip : use IP based tunnel to reach the alternate
srmpls or sripv6 : use SPRING based tunnel (typically the case of TI-LFA)
rsvpte : use a RSVP-TE LSP to reach the alternate
mtldp : use an LDP tunnel based on another topology (typically the case of MRT)
"
::= { ipFrrAltEntry 5 }
ipFrrAltProtectionAvailable OBJECT-TYPE
SYNTAX BITS {
nodeProtect(0),
linkProtect(1),
srlgProtect(2),
downstreamProtect(3),
unknownProtection(4)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"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. "
::= { ipFrrAltEntry 6 }
ipFrrAltMetric1 OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"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."
::= { ipFrrAltEntry 7 }
ipFrrAltMetric2 OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This is the primary routing metric for this
alternate path from the PLR to the alternate.
If the alternate path metric is unknown, the value
should be set to -1."
::= { ipFrrAltEntry 8 }
ipFrrAltMetric3 OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This is the primary routing metric for this
alternate path from the alternate to the destination.
If the alternate path metric is unknown, the value
should be set to -1."
::= { ipFrrAltEntry 9 }
ipFrrAltBest OBJECT-TYPE
SYNTAX INTEGER { false(0), true(1) }
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object provides information if the alternate is the best one."
::= { ipFrrAltEntry 10 }
ipFrrAltNonBestReason OBJECT-TYPE
SYNTAX OCTET STRING (SIZE (0..255))
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object provides reason why an alternate is not the best one."
::= { ipFrrAltEntry 11 }
-- the IP FRR No Alternate MIB-Group
--
-- The ipFrrNoAltTable extends the inetCidrRouteTable
-- to indicate which routes are unprotected and the reason
-- why. The indices do not include the primary next-hop because
-- the lack of protection is for the route. This allows easy
-- access to the set of unprotected routes that would be
-- affected by a local failure of their primary next-hop.
ipFrrNoAltTable OBJECT-TYPE
SYNTAX SEQUENCE OF IpFrrNoAltEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This entity's IP Fast Reroute Unprotected Routes
table."
::= { ipFrrMIBObjects 3 }
ipFrrNoAltEntry OBJECT-TYPE
SYNTAX IpFrrNoAltEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"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."
INDEX { inetCidrRouteDestType,
inetCidrRouteDest,
inetCidrRoutePfxLen
}
::= { ipFrrNoAltTable 1 }
IpFrrNoAltEntry ::= SEQUENCE {
ipFrrNoAltCause INTEGER
}
ipFrrNoAltCause OBJECT-TYPE
SYNTAX INTEGER {
ipFrrUnavailable (1), -- No valid alternate(s)
localAddress (2), -- local/internal address
ipFrrDisabled (3), -- Protection not enabled
other (4) -- unknown or other cause
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"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.
other : The reason is unknown or different from those
specifically enumerated possible causes."
::= { ipFrrNoAltEntry 1 }
-- conformance information
ipFrrMIBConformance
OBJECT IDENTIFIER ::= { ipFrrMIB 2 }
ipFrrMIBCompliances
OBJECT IDENTIFIER ::= { ipFrrMIBConformance 1 }
ipFrrMIBGroups
OBJECT IDENTIFIER ::= { ipFrrMIBConformance 2 }
-- compliance statements
ipFrrMIBCompliance MODULE-COMPLIANCE
STATUS deprecated
DESCRIPTION
"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.
"
MODULE -- this module
MANDATORY-GROUPS { ipFrrBasicGroup }
::= { ipFrrMIBCompliances 1 }
ipFrrMIBInetCompliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"Full conformity to this MIB."
MODULE -- this module
MANDATORY-GROUPS { ipFrrBasicGroup }
OBJECT ipFrrIfRowStatus
SYNTAX INTEGER { active(1) }
WRITE-SYNTAX INTEGER { createAndGo(4), destroy(6) }
DESCRIPTION
"Support for createAndWait and notInService is not
required."
::= { ipFrrMIBCompliances 2 }
ipFrrReadOnlyCompliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"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."
MODULE
MANDATORY-GROUPS { ipFrrBasicGroup }
OBJECT ipFrrIfProtectionType
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."
OBJECT ipFrrIfCandidate
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."
OBJECT ipFrrIfRowStatus
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."
::= { ipFrrMIBCompliances 3 }
-- units of conformance
ipFrrBasicGroup OBJECT-GROUP
OBJECTS {ipFrrTotalRoutes,
ipFrrUnprotectedRoutes,
ipFrrProtectedRoutes,
ipFrrLinkProtectedRoutes,
ipFrrNodeProtectedRoutes,
ipv6FrrTotalRoutes,
ipv6FrrUnprotectedRoutes,
ipv6FrrProtectedRoutes,
ipv6FrrLinkProtectedRoutes,
ipv6FrrNodeProtectedRoutes,
ipFrrAltIfIndex,
ipFrrAltType,
ipFrrTunnelType,
ipFrrAltProtectionAvailable,
ipFrrAltMetric1,
ipFrrAltMetric2,
ipFrrAltMetric3,
ipFrrAltNonBestReason,
ipFrrAltBest,
ipFrrNoAltCause,
ipFrrInstanceAlgorithm,
ipFrrInstanceProtocol,
ipFrrInstancePerPrefixComputation,
ipFrrIfCandidate,
ipFrrIfProtectionType,
ipFrrIfRowStatus,
ipFrrStatsTotalRoutes,
ipFrrStatsUnprotectedRoutes,
ipFrrStatsProtectedRoutes,
ipFrrStatsLinkProtectedRoutes,
ipFrrStatsNodeProtectedRoutes,
ipv6FrrStatsTotalRoutes,
ipv6FrrStatsUnprotectedRoutes,
ipv6FrrStatsProtectedRoutes,
ipv6FrrStatsLinkProtectedRoutes,
ipv6FrrStatsNodeProtectedRoutes
}
STATUS current
DESCRIPTION
"The entire collection of objects defined in
this MIB for management of IP Fast Reroute ."
::= { ipFrrMIBGroups 1 }
END
There are a number of management objects defined in this MIB module with a MAX-ACCESS clause of read-write and/or read-create. Such objects may be considered sensitive or vulnerable in some network environments. The support for SET operations in a non-secure environment without proper protection can have a negative effect on network operations. The ipFrrAltTable contains routing and forwarding information that is critical to the operation of the network in the event of a local failure. Allowing unauthenticated write access to this table can compromise the validity of the alternate forwarding information.
Some of the readable objects in this MIB module (i.e. objects with a MAX-ACCESS other than not-accessible) may be considered sensitive or vulnerable in some network environments. It is thus important to control even GET access to these objects and possibly to even encrypt the values of these objects when sending them over the network via SNMP.
SNMP versions prior to SNMPv3 did not include adequate security. Even if the network itself is secure (for example by using IPSec), even then, there is no control as to who on the secure network is allowed to access and GET the objects in this MIB module.
It is RECOMMENDED that implementers consider the security features as provided by the SNMPv3 framework (see [RFC3410], section 8), including full support for the SNMPv3 cryptographic mechanisms (for authentication and privacy).
Further, deployment of SNMP versions prior to SNMPv3 is NOT RECOMMENDED. Instead, it is RECOMMENDED to deploy SNMPv3 and to enable cryptographic security. It is then a customer/operator responsibility to ensure that the SNMP entity giving access to an instance of this MIB module is properly configured to give access to the objects only to those principals (users) that have legitimate rights to indeed GET them.
The authors would like to acknowledge contributions made by Bill Anderson, Don Fedyk, John Flick and Bruno Decraene.
The MIB module in this document uses the following IANA-assigned OBJECT IDENTIFIER value recorded in the SMI Numbers registry.
The IANA is requested to assign { ip ZZZ } to the IPFRR-MIB MIB module specified in this document.
Editor's Note (to be removed prior to publication): the IANA is requested to assign a value for "ZZZ" under the ip subtree and to record the assignments in the SMI Numbers registry. When the assignments have been made, the RFC Editor is asked to replace "ZZZ" (here and in the MIB modules) with the assigned value and to remove this note.
| [RFC2119] | Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, March 1997. |
| [RFC2863] | McCloghrie, K. and F. Kastenholz, "The Interfaces Group MIB", RFC 2863, DOI 10.17487/RFC2863, June 2000. |
| [RFC4001] | Daniele, M., Haberman, B., Routhier, S. and J. Schoenwaelder, "Textual Conventions for Internet Network Addresses", RFC 4001, DOI 10.17487/RFC4001, February 2005. |
| [RFC4292] | Haberman, B., "IP Forwarding Table MIB", RFC 4292, DOI 10.17487/RFC4292, April 2006. |
| [RFC4293] | Routhier, S., "Management Information Base for the Internet Protocol (IP)", RFC 4293, DOI 10.17487/RFC4293, April 2006. |
| [RFC5286] | Atlas, A. and A. Zinin, "Basic Specification for IP Fast Reroute: Loop-Free Alternates", RFC 5286, DOI 10.17487/RFC5286, September 2008. |
| [RFC2578] | McCloghrie, K., Perkins, D. and J. Schoenwaelder, "Structure of Management Information Version 2 (SMIv2)", STD 58, RFC 2578, DOI 10.17487/RFC2578, April 1999. |
| [RFC2579] | McCloghrie, K., Perkins, D. and J. Schoenwaelder, "Textual Conventions for SMIv2", STD 58, RFC 2579, DOI 10.17487/RFC2579, April 1999. |
| [RFC2580] | McCloghrie, K., Perkins, D. and J. Schoenwaelder, "Conformance Statements for SMIv2", STD 58, RFC 2580, DOI 10.17487/RFC2580, April 1999. |
| [RFC3410] | Case, J., Mundy, R., Partain, D. and B. Stewart, "Introduction and Applicability Statements for Internet-Standard Management Framework", RFC 3410, DOI 10.17487/RFC3410, December 2002. |
| [RFC5036] | Andersson, L., Minei, I. and B. Thomas, "LDP Specification", RFC 5036, DOI 10.17487/RFC5036, October 2007. |
| [RFC5714] | Shand, M. and S. Bryant, "IP Fast Reroute Framework", RFC 5714, DOI 10.17487/RFC5714, January 2010. |