Network Working Group B. Haberman
Request for Comments: 4292 Johns Hopkins University
Obsoletes: 2096 April 2006
Category: Standards Track
IP Forwarding Table MIB
Status of This Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
Copyright Notice
Copyright (C) The Internet Society (2006).
Abstract
This document 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 related to
the forwarding of Internet Protocol (IP) packets in an IP version-
independent manner. This document obsoletes RFC 2096.
Table of Contents
1. Introduction ....................................................2
2. Conventions Used In This Document ...............................2
3. The Internet-Standard Management Framework ......................2
4. Overview ........................................................2
4.1. Relationship to Other MIBs .................................3
4.1.1. RFC 1213 ............................................3
4.1.2. RFC 1354 ............................................3
4.1.3. RFC 2096 ............................................3
4.1.4. RFC 2011 and 2465 ...................................3
5. Definitions .....................................................3
6. Security Considerations ........................................30
7. Changes from RFC 2096 ..........................................31
8. Normative References ...........................................32
9. Informative References .........................................32
10. Authors and Acknowledgements ..................................33
Haberman Standards Track [Page 1]
RFC 4292 IP Forwarding Table MIB April 2006
1. Introduction
This document defines a portion of the Management Information Base
(MIB) for use in managing objects related to the forwarding of
Internet Protocol (IP) packets in an IP version-independent manner.
It should be noted that the MIB definition described herein does not
support multiple instances based on the same address family type.
However, it does support an instance of the MIB per address family.
2. Conventions Used In This Document
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 RFC 2119 [RFC2119].
3. The Internet-Standard Management Framework
For a detailed overview of the documents that describe the current
Internet-Standard Management Framework, please refer to section 7 of
RFC 3410 [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,
RFC 2578 [RFC2578], STD 58, RFC 2579 [RFC2579] and STD 58, RFC 2580
[RFC2580].
4. Overview
The MIB consists of one current table and two current global objects.
1. The object inetCidrRouteNumber indicates the number of current
routes. This is primarily to avoid having to read the table in
order to determine this number.
2. The object inetCidrRouteDiscards counts the number of valid
routes that were discarded from inetCidrRouteTable for any
reason. This object replaces the ipRoutingDiscards and
ipv6DiscardedRoutes objects.
3. The inetCidrRouteTable provides the ability to display IP
version-independent multipath CIDR routes.
Haberman Standards Track [Page 2]
RFC 4292 IP Forwarding Table MIB April 2006
4.1. Relationship to Other MIBs
This MIB definition contains several deprecated and obsolete tables
and objects. The following subsections describe the relationship
between these objects and other MIB modules.
4.1.1. RFC 1213
The ipRouteTable object was originally defined in RFC 1213 [RFC1213].
It was updated by ipForwardTable in RFC 1354 [RFC1354].
4.1.2. RFC 1354
The ipForwardTable object replaced the ipRouteTable object from RFC
1213. It was in turn obsoleted by the ipCidrRouteTable defined in
RFC 2096 [RFC2096].
In addition, RFC 1354 introduced ipForwardNumber. This object
reflects the number of entries found in ipForwardTable. It was
obsoleted by ipCidrRouteNumber, defined in RFC 2096.
4.1.3. RFC 2096
In RFC 2096, the ipCidrRouteTable and ipCidrRouteNumber were
introduced. The ipCidrRouteTable object supports multipath IP routes
having the same network number but differing network masks. The
number of entries in that table is reflected in ipCidrRouteNumber.
These objects are deprecated by the definitions contained in this MIB
definition.
4.1.4. RFC 2011 and 2465
RFC 2011 [RFC2011] contains the ipRoutingDiscards object, which
counts the number of valid routes that have been removed from the
ipCidrRouteTable object. The corresponding ipv6DiscardedRoutes
object is defined in RFC 2465 [RFC2465]. These objects are
deprecated in favor of the version-independent object
inetCidrRouteDiscards defined in this MIB.
5. Definitions
IP-FORWARD-MIB DEFINITIONS ::= BEGIN
IMPORTS
MODULE-IDENTITY, OBJECT-TYPE,
IpAddress, Integer32, Gauge32,
Counter32 FROM SNMPv2-SMI
RowStatus FROM SNMPv2-TC
Haberman Standards Track [Page 3]
RFC 4292 IP Forwarding Table MIB April 2006
MODULE-COMPLIANCE, OBJECT-GROUP FROM SNMPv2-CONF
InterfaceIndexOrZero FROM IF-MIB
ip FROM IP-MIB
IANAipRouteProtocol FROM IANA-RTPROTO-MIB
InetAddress, InetAddressType,
InetAddressPrefixLength,
InetAutonomousSystemNumber FROM INET-ADDRESS-MIB;
ipForward MODULE-IDENTITY
LAST-UPDATED "200602010000Z"
ORGANIZATION
"IETF IPv6 Working Group
http://www.ietf.org/html.charters/ipv6-charter.html"
CONTACT-INFO
"Editor:
Brian Haberman
Johns Hopkins University - Applied Physics Laboratory
Mailstop 17-S442
11100 Johns Hopkins Road
Laurel MD, 20723-6099 USA
Phone: +1-443-778-1319
Email: brian@innovationslab.net
Send comments to "
DESCRIPTION
"The MIB module for the management of CIDR multipath IP
Routes.
Copyright (C) The Internet Society (2006). This version
of this MIB module is a part of RFC 4292; see the RFC
itself for full legal notices."
REVISION "200602010000Z"
DESCRIPTION
"IPv4/v6 version-independent revision. Minimal changes
were made to the original RFC 2096 MIB to allow easy
upgrade of existing IPv4 implementations to the
version-independent MIB. These changes include:
Adding inetCidrRouteDiscards as a replacement for the
deprecated ipRoutingDiscards and ipv6DiscardedRoutes
objects.
Adding a new conformance statement to support the
implementation of the IP Forwarding MIB in a
read-only mode.
Haberman Standards Track [Page 4]
RFC 4292 IP Forwarding Table MIB April 2006
The inetCidrRouteTable replaces the IPv4-specific
ipCidrRouteTable, its related objects, and related
conformance statements.
Published as RFC 4292."
REVISION "199609190000Z"
DESCRIPTION
"Revised to support CIDR routes.
Published as RFC 2096."
REVISION "199207022156Z"
DESCRIPTION
"Initial version, published as RFC 1354."
::= { ip 24 }
inetCidrRouteNumber OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of current inetCidrRouteTable entries that
are not invalid."
::= { ipForward 6 }
inetCidrRouteDiscards OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of valid route entries discarded from the
inetCidrRouteTable. Discarded route entries do not
appear in the inetCidrRouteTable. One possible reason
for discarding an entry would be to free-up buffer space
for other route table entries."
::= { ipForward 8 }
-- Inet CIDR Route Table
-- The Inet CIDR Route Table deprecates and replaces the
-- ipCidrRoute Table currently in the IP Forwarding Table MIB.
-- It adds IP protocol independence.
inetCidrRouteTable OBJECT-TYPE
SYNTAX SEQUENCE OF InetCidrRouteEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
Haberman Standards Track [Page 5]
RFC 4292 IP Forwarding Table MIB April 2006
"This entity's IP Routing table."
REFERENCE
"RFC 1213 Section 6.6, The IP Group"
::= { ipForward 7 }
inetCidrRouteEntry OBJECT-TYPE
SYNTAX InetCidrRouteEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A particular route to a particular destination, under a
particular policy (as reflected in the
inetCidrRoutePolicy object).
Dynamically created rows will survive an agent reboot.
Implementers need to be aware that if the total number
of elements (octets or sub-identifiers) in
inetCidrRouteDest, inetCidrRoutePolicy, and
inetCidrRouteNextHop exceeds 111, 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
}
::= { inetCidrRouteTable 1 }
InetCidrRouteEntry ::= SEQUENCE {
inetCidrRouteDestType InetAddressType,
inetCidrRouteDest InetAddress,
inetCidrRoutePfxLen InetAddressPrefixLength,
inetCidrRoutePolicy OBJECT IDENTIFIER,
inetCidrRouteNextHopType InetAddressType,
inetCidrRouteNextHop InetAddress,
inetCidrRouteIfIndex InterfaceIndexOrZero,
inetCidrRouteType INTEGER,
inetCidrRouteProto IANAipRouteProtocol,
inetCidrRouteAge Gauge32,
inetCidrRouteNextHopAS InetAutonomousSystemNumber,
inetCidrRouteMetric1 Integer32,
inetCidrRouteMetric2 Integer32,
inetCidrRouteMetric3 Integer32,
Haberman Standards Track [Page 6]
RFC 4292 IP Forwarding Table MIB April 2006
inetCidrRouteMetric4 Integer32,
inetCidrRouteMetric5 Integer32,
inetCidrRouteStatus RowStatus
}
inetCidrRouteDestType OBJECT-TYPE
SYNTAX InetAddressType
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The type of the inetCidrRouteDest 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"
::= { inetCidrRouteEntry 1 }
inetCidrRouteDest OBJECT-TYPE
SYNTAX InetAddress
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The destination IP address of this route.
The type of this address is determined by the value of
the inetCidrRouteDestType object.
The values for the index objects inetCidrRouteDest and
inetCidrRoutePfxLen must be consistent. When the value
of inetCidrRouteDest (excluding the zone index, if one
is present) is x, then the bitwise logical-AND
of x with the value of the mask formed from the
corresponding index object inetCidrRoutePfxLen MUST be
equal to x. If not, then the index pair is not
consistent and an inconsistentName error must be
returned on SET or CREATE requests."
::= { inetCidrRouteEntry 2 }
inetCidrRoutePfxLen OBJECT-TYPE
SYNTAX InetAddressPrefixLength
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Indicates the number of leading one bits that form the
mask to be logical-ANDed with the destination address
before being compared to the value in the
Haberman Standards Track [Page 7]
RFC 4292 IP Forwarding Table MIB April 2006
inetCidrRouteDest field.
The values for the index objects inetCidrRouteDest and
inetCidrRoutePfxLen must be consistent. When the value
of inetCidrRouteDest (excluding the zone index, if one
is present) is x, then the bitwise logical-AND
of x with the value of the mask formed from the
corresponding index object inetCidrRoutePfxLen MUST be
equal to x. If not, then the index pair is not
consistent and an inconsistentName error must be
returned on SET or CREATE requests."
::= { inetCidrRouteEntry 3 }
inetCidrRoutePolicy OBJECT-TYPE
SYNTAX OBJECT IDENTIFIER
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This object is an opaque object without any defined
semantics. Its purpose is to serve as an additional
index that may delineate between multiple entries to
the same destination. The value { 0 0 } shall be used
as the default value for this object."
::= { inetCidrRouteEntry 4 }
inetCidrRouteNextHopType OBJECT-TYPE
SYNTAX InetAddressType
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The type of the inetCidrRouteNextHop address, as
defined in the InetAddress MIB.
Value should be set to unknown(0) for non-remote
routes.
Only those address types that may appear in an actual
routing table are allowed as values of this object."
REFERENCE "RFC 4001"
::= { inetCidrRouteEntry 5 }
inetCidrRouteNextHop OBJECT-TYPE
SYNTAX InetAddress
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"On remote routes, the address of the next system en
Haberman Standards Track [Page 8]
RFC 4292 IP Forwarding Table MIB April 2006
route. For non-remote routes, a zero length string.
The type of this address is determined by the value of
the inetCidrRouteNextHopType object."
::= { inetCidrRouteEntry 6 }
inetCidrRouteIfIndex OBJECT-TYPE
SYNTAX InterfaceIndexOrZero
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The ifIndex value that identifies the local interface
through which the next hop of this route should be
reached. A value of 0 is valid and represents the
scenario where no interface is specified."
::= { inetCidrRouteEntry 7 }
inetCidrRouteType OBJECT-TYPE
SYNTAX INTEGER {
other (1), -- not specified by this MIB
reject (2), -- route that discards traffic and
-- returns ICMP notification
local (3), -- local interface
remote (4), -- remote destination
blackhole(5) -- route that discards traffic
-- silently
}
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The type of route. Note that local(3) refers to a
route for which the next hop is the final destination;
remote(4) refers to a route for which the next hop is
not the final destination.
Routes that do not result in traffic forwarding or
rejection should not be displayed, even if the
implementation keeps them stored internally.
reject(2) refers to a route that, if matched, discards
the message as unreachable and returns a notification
(e.g., ICMP error) to the message sender. This is used
in some protocols as a means of correctly aggregating
routes.
blackhole(5) refers to a route that, if matched,
discards the message silently."
::= { inetCidrRouteEntry 8 }
Haberman Standards Track [Page 9]
RFC 4292 IP Forwarding Table MIB April 2006
inetCidrRouteProto OBJECT-TYPE
SYNTAX IANAipRouteProtocol
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The routing mechanism via which this route was learned.
Inclusion of values for gateway routing protocols is
not intended to imply that hosts should support those
protocols."
::= { inetCidrRouteEntry 9 }
inetCidrRouteAge OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of seconds since this route was last updated
or otherwise determined to be correct. Note that no
semantics of 'too old' can be implied, except through
knowledge of the routing protocol by which the route
was learned."
::= { inetCidrRouteEntry 10 }
inetCidrRouteNextHopAS OBJECT-TYPE
SYNTAX InetAutonomousSystemNumber
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The Autonomous System Number of the Next Hop. The
semantics of this object are determined by the routing-
protocol specified in the route's inetCidrRouteProto
value. When this object is unknown or not relevant, its
value should be set to zero."
DEFVAL { 0 }
::= { inetCidrRouteEntry 11 }
inetCidrRouteMetric1 OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The primary routing metric for this route. The
semantics of this metric are determined by the routing-
protocol specified in the route's inetCidrRouteProto
value. If this metric is not used, its value should be
set to -1."
DEFVAL { -1 }
Haberman Standards Track [Page 10]
RFC 4292 IP Forwarding Table MIB April 2006
::= { inetCidrRouteEntry 12 }
inetCidrRouteMetric2 OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"An alternate routing metric for this route. The
semantics of this metric are determined by the routing-
protocol specified in the route's inetCidrRouteProto
value. If this metric is not used, its value should be
set to -1."
DEFVAL { -1 }
::= { inetCidrRouteEntry 13 }
inetCidrRouteMetric3 OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"An alternate routing metric for this route. The
semantics of this metric are determined by the routing-
protocol specified in the route's inetCidrRouteProto
value. If this metric is not used, its value should be
set to -1."
DEFVAL { -1 }
::= { inetCidrRouteEntry 14 }
inetCidrRouteMetric4 OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"An alternate routing metric for this route. The
semantics of this metric are determined by the routing-
protocol specified in the route's inetCidrRouteProto
value. If this metric is not used, its value should be
set to -1."
DEFVAL { -1 }
::= { inetCidrRouteEntry 15 }
inetCidrRouteMetric5 OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"An alternate routing metric for this route. The
semantics of this metric are determined by the routing-
Haberman Standards Track [Page 11]
RFC 4292 IP Forwarding Table MIB April 2006
protocol specified in the route's inetCidrRouteProto
value. If this metric is not used, its value should be
set to -1."
DEFVAL { -1 }
::= { inetCidrRouteEntry 16 }
inetCidrRouteStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The row status variable, used according to row
installation and removal conventions.
A row entry cannot be modified when the status is
marked as active(1)."
::= { inetCidrRouteEntry 17 }
-- Conformance information
ipForwardConformance
OBJECT IDENTIFIER ::= { ipForward 5 }
ipForwardGroups
OBJECT IDENTIFIER ::= { ipForwardConformance 1 }
ipForwardCompliances
OBJECT IDENTIFIER ::= { ipForwardConformance 2 }
-- Compliance statements
ipForwardFullCompliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"When this MIB is implemented for read-create, the
implementation can claim full compliance.
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), ipv6(2),
-- ipv4z(3), ipv6z(4))
-- DESCRIPTION
-- This MIB requires support for global and
-- non-global ipv4 and ipv6 addresses.
Haberman Standards Track [Page 12]
RFC 4292 IP Forwarding Table MIB April 2006
--
-- OBJECT inetCidrRouteDest
-- SYNTAX InetAddress (SIZE (4 | 8 | 16 | 20))
-- DESCRIPTION
-- This MIB requires support for global and
-- non-global IPv4 and IPv6 addresses.
--
-- OBJECT inetCidrRouteNextHopType
-- SYNTAX InetAddressType (unknown(0), ipv4(1),
-- ipv6(2), ipv4z(3)
-- ipv6z(4))
-- DESCRIPTION
-- This MIB requires support for global and
-- non-global ipv4 and ipv6 addresses.
--
-- OBJECT inetCidrRouteNextHop
-- SYNTAX InetAddress (SIZE (0 | 4 | 8 | 16 | 20))
-- DESCRIPTION
-- This MIB requires support for global and
-- non-global IPv4 and IPv6 addresses.
"
MODULE -- this module
MANDATORY-GROUPS { inetForwardCidrRouteGroup }
OBJECT inetCidrRouteStatus
SYNTAX RowStatus { active(1), notInService (2) }
WRITE-SYNTAX RowStatus { active(1), notInService (2),
createAndGo(4), destroy(6) }
DESCRIPTION "Support for createAndWait is not required."
::= { ipForwardCompliances 3 }
ipForwardReadOnlyCompliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"When this MIB is implemented without support for read-
create (i.e., in read-only mode), the implementation can
claim read-only compliance."
MODULE -- this module
MANDATORY-GROUPS { inetForwardCidrRouteGroup }
OBJECT inetCidrRouteIfIndex
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."
OBJECT inetCidrRouteType
Haberman Standards Track [Page 13]
RFC 4292 IP Forwarding Table MIB April 2006
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."
OBJECT inetCidrRouteNextHopAS
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."
OBJECT inetCidrRouteMetric1
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."
OBJECT inetCidrRouteMetric2
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."
OBJECT inetCidrRouteMetric3
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."
OBJECT inetCidrRouteMetric4
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."
OBJECT inetCidrRouteMetric5
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."
OBJECT inetCidrRouteStatus
SYNTAX RowStatus { active(1) }
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required."
::= { ipForwardCompliances 4 }
-- units of conformance
inetForwardCidrRouteGroup OBJECT-GROUP
OBJECTS { inetCidrRouteDiscards,
inetCidrRouteIfIndex, inetCidrRouteType,
inetCidrRouteProto, inetCidrRouteAge,
Haberman Standards Track [Page 14]
RFC 4292 IP Forwarding Table MIB April 2006
inetCidrRouteNextHopAS, inetCidrRouteMetric1,
inetCidrRouteMetric2, inetCidrRouteMetric3,
inetCidrRouteMetric4, inetCidrRouteMetric5,
inetCidrRouteStatus, inetCidrRouteNumber
}
STATUS current
DESCRIPTION
"The IP version-independent CIDR Route Table."
::= { ipForwardGroups 4 }
-- Deprecated Objects
ipCidrRouteNumber OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS deprecated
DESCRIPTION
"The number of current ipCidrRouteTable entries that are
not invalid. This object is deprecated in favor of
inetCidrRouteNumber and the inetCidrRouteTable."
::= { ipForward 3 }
-- IP CIDR Route Table
-- The IP CIDR Route Table obsoletes and replaces the ipRoute
-- Table current in MIB-I and MIB-II and the IP Forwarding Table.
-- It adds knowledge of the autonomous system of the next hop,
-- multiple next hops, policy routing, and Classless
-- Inter-Domain Routing.
ipCidrRouteTable OBJECT-TYPE
SYNTAX SEQUENCE OF IpCidrRouteEntry
MAX-ACCESS not-accessible
STATUS deprecated
DESCRIPTION
"This entity's IP Routing table. This table has been
deprecated in favor of the IP version neutral
inetCidrRouteTable."
REFERENCE
"RFC 1213 Section 6.6, The IP Group"
::= { ipForward 4 }
ipCidrRouteEntry OBJECT-TYPE
SYNTAX IpCidrRouteEntry
MAX-ACCESS not-accessible
STATUS deprecated
DESCRIPTION
"A particular route to a particular destination, under a
Haberman Standards Track [Page 15]
RFC 4292 IP Forwarding Table MIB April 2006
particular policy."
INDEX {
ipCidrRouteDest,
ipCidrRouteMask,
ipCidrRouteTos,
ipCidrRouteNextHop
}
::= { ipCidrRouteTable 1 }
IpCidrRouteEntry ::= SEQUENCE {
ipCidrRouteDest IpAddress,
ipCidrRouteMask IpAddress,
ipCidrRouteTos Integer32,
ipCidrRouteNextHop IpAddress,
ipCidrRouteIfIndex Integer32,
ipCidrRouteType INTEGER,
ipCidrRouteProto INTEGER,
ipCidrRouteAge Integer32,
ipCidrRouteInfo OBJECT IDENTIFIER,
ipCidrRouteNextHopAS Integer32,
ipCidrRouteMetric1 Integer32,
ipCidrRouteMetric2 Integer32,
ipCidrRouteMetric3 Integer32,
ipCidrRouteMetric4 Integer32,
ipCidrRouteMetric5 Integer32,
ipCidrRouteStatus RowStatus
}
ipCidrRouteDest OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-only
STATUS deprecated
DESCRIPTION
"The destination IP address of this route.
This object may not take a Multicast (Class D) address
value.
Any assignment (implicit or otherwise) of an instance
of this object to a value x must be rejected if the
bitwise logical-AND of x with the value of the
corresponding instance of the ipCidrRouteMask object is
not equal to x."
::= { ipCidrRouteEntry 1 }
ipCidrRouteMask OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-only
Haberman Standards Track [Page 16]
RFC 4292 IP Forwarding Table MIB April 2006
STATUS deprecated
DESCRIPTION
"Indicate the mask to be logical-ANDed with the
destination address before being compared to the value
in the ipCidrRouteDest field. For those systems that
do not support arbitrary subnet masks, an agent
constructs the value of the ipCidrRouteMask by
reference to the IP Address Class.
Any assignment (implicit or otherwise) of an instance
of this object to a value x must be rejected if the
bitwise logical-AND of x with the value of the
corresponding instance of the ipCidrRouteDest object is
not equal to ipCidrRouteDest."
::= { ipCidrRouteEntry 2 }
-- The following convention is included for specification
-- of TOS Field contents. At this time, the Host Requirements
-- and the Router Requirements documents disagree on the width
-- of the TOS field. This mapping describes the Router
-- Requirements mapping, and leaves room to widen the TOS field
-- without impact to fielded systems.
ipCidrRouteTos OBJECT-TYPE
SYNTAX Integer32 (0..2147483647)
MAX-ACCESS read-only
STATUS deprecated
DESCRIPTION
"The policy specifier is the IP TOS Field. The encoding
of IP TOS is as specified by the following convention.
Zero indicates the default path if no more specific
policy applies.
+-----+-----+-----+-----+-----+-----+-----+-----+
| | | |
| PRECEDENCE | TYPE OF SERVICE | 0 |
| | | |
+-----+-----+-----+-----+-----+-----+-----+-----+
IP TOS IP TOS
Field Policy Field Policy
Contents Code Contents Code
0 0 0 0 ==> 0 0 0 0 1 ==> 2
0 0 1 0 ==> 4 0 0 1 1 ==> 6
0 1 0 0 ==> 8 0 1 0 1 ==> 10
0 1 1 0 ==> 12 0 1 1 1 ==> 14
1 0 0 0 ==> 16 1 0 0 1 ==> 18
1 0 1 0 ==> 20 1 0 1 1 ==> 22
Haberman Standards Track [Page 17]
RFC 4292 IP Forwarding Table MIB April 2006
1 1 0 0 ==> 24 1 1 0 1 ==> 26
1 1 1 0 ==> 28 1 1 1 1 ==> 30"
::= { ipCidrRouteEntry 3 }
ipCidrRouteNextHop OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-only
STATUS deprecated
DESCRIPTION
"On remote routes, the address of the next system en
route; Otherwise, 0.0.0.0."
::= { ipCidrRouteEntry 4 }
ipCidrRouteIfIndex OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-create
STATUS deprecated
DESCRIPTION
"The ifIndex value that identifies the local interface
through which the next hop of this route should be
reached."
DEFVAL { 0 }
::= { ipCidrRouteEntry 5 }
ipCidrRouteType OBJECT-TYPE
SYNTAX INTEGER {
other (1), -- not specified by this MIB
reject (2), -- route that discards traffic
local (3), -- local interface
remote (4) -- remote destination
}
MAX-ACCESS read-create
STATUS deprecated
DESCRIPTION
"The type of route. Note that local(3) refers to a
route for which the next hop is the final destination;
remote(4) refers to a route for which the next hop is
not the final destination.
Routes that do not result in traffic forwarding or
rejection should not be displayed, even if the
implementation keeps them stored internally.
reject (2) refers to a route that, if matched,
discards the message as unreachable. This is used in
some protocols as a means of correctly aggregating
routes."
::= { ipCidrRouteEntry 6 }
Haberman Standards Track [Page 18]
RFC 4292 IP Forwarding Table MIB April 2006
ipCidrRouteProto OBJECT-TYPE
SYNTAX INTEGER {
other (1), -- not specified
local (2), -- local interface
netmgmt (3), -- static route
icmp (4), -- result of ICMP Redirect
-- the following are all dynamic
-- routing protocols
egp (5), -- Exterior Gateway Protocol
ggp (6), -- Gateway-Gateway Protocol
hello (7), -- FuzzBall HelloSpeak
rip (8), -- Berkeley RIP or RIP-II
isIs (9), -- Dual IS-IS
esIs (10), -- ISO 9542
ciscoIgrp (11), -- Cisco IGRP
bbnSpfIgp (12), -- BBN SPF IGP
ospf (13), -- Open Shortest Path First
bgp (14), -- Border Gateway Protocol
idpr (15), -- InterDomain Policy Routing
ciscoEigrp (16) -- Cisco EIGRP
}
MAX-ACCESS read-only
STATUS deprecated
DESCRIPTION
"The routing mechanism via which this route was learned.
Inclusion of values for gateway routing protocols is
not intended to imply that hosts should support those
protocols."
::= { ipCidrRouteEntry 7 }
ipCidrRouteAge OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-only
STATUS deprecated
DESCRIPTION
"The number of seconds since this route was last updated
or otherwise determined to be correct. Note that no
semantics of `too old' can be implied, except through
knowledge of the routing protocol by which the route
was learned."
DEFVAL { 0 }
::= { ipCidrRouteEntry 8 }
ipCidrRouteInfo OBJECT-TYPE
SYNTAX OBJECT IDENTIFIER
MAX-ACCESS read-create
Haberman Standards Track [Page 19]
RFC 4292 IP Forwarding Table MIB April 2006
STATUS deprecated
DESCRIPTION
"A reference to MIB definitions specific to the
particular routing protocol that is responsible for
this route, as determined by the value specified in the
route's ipCidrRouteProto value. If this information is
not present, its value should be set to the OBJECT
IDENTIFIER { 0 0 }, which is a syntactically valid
object identifier, and any implementation conforming to
ASN.1 and the Basic Encoding Rules must be able to
generate and recognize this value."
::= { ipCidrRouteEntry 9 }
ipCidrRouteNextHopAS OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-create
STATUS deprecated
DESCRIPTION
"The Autonomous System Number of the Next Hop. The
semantics of this object are determined by the routing-
protocol specified in the route's ipCidrRouteProto
value. When this object is unknown or not relevant, its
value should be set to zero."
DEFVAL { 0 }
::= { ipCidrRouteEntry 10 }
ipCidrRouteMetric1 OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-create
STATUS deprecated
DESCRIPTION
"The primary routing metric for this route. The
semantics of this metric are determined by the routing-
protocol specified in the route's ipCidrRouteProto
value. If this metric is not used, its value should be
set to -1."
DEFVAL { -1 }
::= { ipCidrRouteEntry 11 }
ipCidrRouteMetric2 OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-create
STATUS deprecated
DESCRIPTION
"An alternate routing metric for this route. The
semantics of this metric are determined by the routing-
protocol specified in the route's ipCidrRouteProto
value. If this metric is not used, its value should be
Haberman Standards Track [Page 20]
RFC 4292 IP Forwarding Table MIB April 2006
set to -1."
DEFVAL { -1 }
::= { ipCidrRouteEntry 12 }
ipCidrRouteMetric3 OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-create
STATUS deprecated
DESCRIPTION
"An alternate routing metric for this route. The
semantics of this metric are determined by the routing-
protocol specified in the route's ipCidrRouteProto
value. If this metric is not used, its value should be
set to -1."
DEFVAL { -1 }
::= { ipCidrRouteEntry 13 }
ipCidrRouteMetric4 OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-create
STATUS deprecated
DESCRIPTION
"An alternate routing metric for this route. The
semantics of this metric are determined by the routing-
protocol specified in the route's ipCidrRouteProto
value. If this metric is not used, its value should be
set to -1."
DEFVAL { -1 }
::= { ipCidrRouteEntry 14 }
ipCidrRouteMetric5 OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-create
STATUS deprecated
DESCRIPTION
"An alternate routing metric for this route. The
semantics of this metric are determined by the routing-
protocol specified in the route's ipCidrRouteProto
value. If this metric is not used, its value should be
set to -1."
DEFVAL { -1 }
::= { ipCidrRouteEntry 15 }
ipCidrRouteStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS deprecated
DESCRIPTION
Haberman Standards Track [Page 21]
RFC 4292 IP Forwarding Table MIB April 2006
"The row status variable, used according to row
installation and removal conventions."
::= { ipCidrRouteEntry 16 }
-- compliance statements
ipForwardCompliance MODULE-COMPLIANCE
STATUS deprecated
DESCRIPTION
"The compliance statement for SNMPv2 entities that
implement the ipForward MIB.
This compliance statement has been deprecated and
replaced with ipForwardFullCompliance and
ipForwardReadOnlyCompliance."
MODULE -- this module
MANDATORY-GROUPS { ipForwardCidrRouteGroup }
::= { ipForwardCompliances 1 }
-- units of conformance
ipForwardCidrRouteGroup OBJECT-GROUP
OBJECTS { ipCidrRouteNumber,
ipCidrRouteDest, ipCidrRouteMask, ipCidrRouteTos,
ipCidrRouteNextHop, ipCidrRouteIfIndex,
ipCidrRouteType, ipCidrRouteProto, ipCidrRouteAge,
ipCidrRouteInfo,ipCidrRouteNextHopAS,
ipCidrRouteMetric1, ipCidrRouteMetric2,
ipCidrRouteMetric3, ipCidrRouteMetric4,
ipCidrRouteMetric5, ipCidrRouteStatus
}
STATUS deprecated
DESCRIPTION
"The CIDR Route Table.
This group has been deprecated and replaced with
inetForwardCidrRouteGroup."
::= { ipForwardGroups 3 }
-- Obsoleted Definitions - Objects
ipForwardNumber OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS obsolete
DESCRIPTION
Haberman Standards Track [Page 22]
RFC 4292 IP Forwarding Table MIB April 2006
"The number of current ipForwardTable entries that are
not invalid."
::= { ipForward 1 }
-- IP Forwarding Table
-- The IP Forwarding Table obsoletes and replaces the ipRoute
-- Table current in MIB-I and MIB-II. It adds knowledge of
-- the autonomous system of the next hop, multiple next hop
-- support, and policy routing support.
ipForwardTable OBJECT-TYPE
SYNTAX SEQUENCE OF IpForwardEntry
MAX-ACCESS not-accessible
STATUS obsolete
DESCRIPTION
"This entity's IP Routing table."
REFERENCE
"RFC 1213 Section 6.6, The IP Group"
::= { ipForward 2 }
ipForwardEntry OBJECT-TYPE
SYNTAX IpForwardEntry
MAX-ACCESS not-accessible
STATUS obsolete
DESCRIPTION
"A particular route to a particular destination, under a
particular policy."
INDEX {
ipForwardDest,
ipForwardProto,
ipForwardPolicy,
ipForwardNextHop
}
::= { ipForwardTable 1 }
IpForwardEntry ::= SEQUENCE {
ipForwardDest IpAddress,
ipForwardMask IpAddress,
ipForwardPolicy Integer32,
ipForwardNextHop IpAddress,
ipForwardIfIndex Integer32,
ipForwardType INTEGER,
ipForwardProto INTEGER,
ipForwardAge Integer32,
ipForwardInfo OBJECT IDENTIFIER,
ipForwardNextHopAS Integer32,
ipForwardMetric1 Integer32,
Haberman Standards Track [Page 23]
RFC 4292 IP Forwarding Table MIB April 2006
ipForwardMetric2 Integer32,
ipForwardMetric3 Integer32,
ipForwardMetric4 Integer32,
ipForwardMetric5 Integer32
}
ipForwardDest OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-only
STATUS obsolete
DESCRIPTION
"The destination IP address of this route. An entry
with a value of 0.0.0.0 is considered a default route.
This object may not take a Multicast (Class D) address
value.
Any assignment (implicit or otherwise) of an instance
of this object to a value x must be rejected if the
bitwise logical-AND of x with the value of the
corresponding instance of the ipForwardMask object is
not equal to x."
::= { ipForwardEntry 1 }
ipForwardMask OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-create
STATUS obsolete
DESCRIPTION
"Indicate the mask to be logical-ANDed with the
destination address before being compared to the value
in the ipForwardDest field. For those systems that do
not support arbitrary subnet masks, an agent constructs
the value of the ipForwardMask by reference to the IP
Address Class.
Any assignment (implicit or otherwise) of an instance
of this object to a value x must be rejected if the
bitwise logical-AND of x with the value of the
corresponding instance of the ipForwardDest object is
not equal to ipForwardDest."
DEFVAL { '00000000'H } -- 0.0.0.0
::= { ipForwardEntry 2 }
-- The following convention is included for specification
-- of TOS Field contents. At this time, the Host Requirements
-- and the Router Requirements documents disagree on the width
-- of the TOS field. This mapping describes the Router
Haberman Standards Track [Page 24]
RFC 4292 IP Forwarding Table MIB April 2006
-- Requirements mapping, and leaves room to widen the TOS field
-- without impact to fielded systems.
ipForwardPolicy OBJECT-TYPE
SYNTAX Integer32 (0..2147483647)
MAX-ACCESS read-only
STATUS obsolete
DESCRIPTION
"The general set of conditions that would cause
the selection of one multipath route (set of
next hops for a given destination) is referred
to as 'policy'.
Unless the mechanism indicated by ipForwardProto
specifies otherwise, the policy specifier is
the IP TOS Field. The encoding of IP TOS is as
specified by the following convention. Zero
indicates the default path if no more specific
policy applies.
+-----+-----+-----+-----+-----+-----+-----+-----+
| | | |
| PRECEDENCE | TYPE OF SERVICE | 0 |
| | | |
+-----+-----+-----+-----+-----+-----+-----+-----+
IP TOS IP TOS
Field Policy Field Policy
Contents Code Contents Code
0 0 0 0 ==> 0 0 0 0 1 ==> 2
0 0 1 0 ==> 4 0 0 1 1 ==> 6
0 1 0 0 ==> 8 0 1 0 1 ==> 10
0 1 1 0 ==> 12 0 1 1 1 ==> 14
1 0 0 0 ==> 16 1 0 0 1 ==> 18
1 0 1 0 ==> 20 1 0 1 1 ==> 22
1 1 0 0 ==> 24 1 1 0 1 ==> 26
1 1 1 0 ==> 28 1 1 1 1 ==> 30
Protocols defining 'policy' otherwise must either
define a set of values that are valid for
this object or must implement an integer-instanced
policy table for which this object's
value acts as an index."
::= { ipForwardEntry 3 }
ipForwardNextHop OBJECT-TYPE
Haberman Standards Track [Page 25]
RFC 4292 IP Forwarding Table MIB April 2006
SYNTAX IpAddress
MAX-ACCESS read-only
STATUS obsolete
DESCRIPTION
"On remote routes, the address of the next system en
route; otherwise, 0.0.0.0."
::= { ipForwardEntry 4 }
ipForwardIfIndex OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-create
STATUS obsolete
DESCRIPTION
"The ifIndex value that identifies the local interface
through which the next hop of this route should be
reached."
DEFVAL { 0 }
::= { ipForwardEntry 5 }
ipForwardType OBJECT-TYPE
SYNTAX INTEGER {
other (1), -- not specified by this MIB
invalid (2), -- logically deleted
local (3), -- local interface
remote (4) -- remote destination
}
MAX-ACCESS read-create
STATUS obsolete
DESCRIPTION
"The type of route. Note that local(3) refers to a
route for which the next hop is the final destination;
remote(4) refers to a route for which the next hop is
not the final destination.
Setting this object to the value invalid(2) has the
effect of invalidating the corresponding entry in the
ipForwardTable object. That is, it effectively
disassociates the destination identified with said
entry from the route identified with said entry. It is
an implementation-specific matter as to whether the
agent removes an invalidated entry from the table.
Accordingly, management stations must be prepared to
receive tabular information from agents that
corresponds to entries not currently in use. Proper
interpretation of such entries requires examination of
the relevant ipForwardType object."
DEFVAL { invalid }
::= { ipForwardEntry 6 }
Haberman Standards Track [Page 26]
RFC 4292 IP Forwarding Table MIB April 2006
ipForwardProto OBJECT-TYPE
SYNTAX INTEGER {
other (1), -- not specified
local (2), -- local interface
netmgmt (3), -- static route
icmp (4), -- result of ICMP Redirect
-- the following are all dynamic
-- routing protocols
egp (5), -- Exterior Gateway Protocol
ggp (6), -- Gateway-Gateway Protocol
hello (7), -- FuzzBall HelloSpeak
rip (8), -- Berkeley RIP or RIP-II
is-is (9), -- Dual IS-IS
es-is (10), -- ISO 9542
ciscoIgrp (11), -- Cisco IGRP
bbnSpfIgp (12), -- BBN SPF IGP
ospf (13), -- Open Shortest Path First
bgp (14), -- Border Gateway Protocol
idpr (15) -- InterDomain Policy Routing
}
MAX-ACCESS read-only
STATUS obsolete
DESCRIPTION
"The routing mechanism via which this route was learned.
Inclusion of values for gateway routing protocols is
not intended to imply that hosts should support those
protocols."
::= { ipForwardEntry 7 }
ipForwardAge OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-only
STATUS obsolete
DESCRIPTION
"The number of seconds since this route was last updated
or otherwise determined to be correct. Note that no
semantics of `too old' can be implied except through
knowledge of the routing protocol by which the route
was learned."
DEFVAL { 0 }
::= { ipForwardEntry 8 }
ipForwardInfo OBJECT-TYPE
SYNTAX OBJECT IDENTIFIER
MAX-ACCESS read-create
STATUS obsolete
Haberman Standards Track [Page 27]
RFC 4292 IP Forwarding Table MIB April 2006
DESCRIPTION
"A reference to MIB definitions specific to the
particular routing protocol that is responsible for
this route, as determined by the value specified in the
route's ipForwardProto value. If this information is
not present, its value should be set to the OBJECT
IDENTIFIER { 0 0 }, which is a syntactically valid
object identifier, and any implementation conforming to
ASN.1 and the Basic Encoding Rules must be able to
generate and recognize this value."
::= { ipForwardEntry 9 }
ipForwardNextHopAS OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-create
STATUS obsolete
DESCRIPTION
"The Autonomous System Number of the Next Hop. When
this is unknown or not relevant to the protocol
indicated by ipForwardProto, zero."
DEFVAL { 0 }
::= { ipForwardEntry 10 }
ipForwardMetric1 OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-create
STATUS obsolete
DESCRIPTION
"The primary routing metric for this route. The
semantics of this metric are determined by the routing-
protocol specified in the route's ipForwardProto value.
If this metric is not used, its value should be set to
-1."
DEFVAL { -1 }
::= { ipForwardEntry 11 }
ipForwardMetric2 OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-create
STATUS obsolete
DESCRIPTION
"An alternate routing metric for this route. The
semantics of this metric are determined by the routing-
protocol specified in the route's ipForwardProto value.
If this metric is not used, its value should be set to
-1."
DEFVAL { -1 }
::= { ipForwardEntry 12 }
Haberman Standards Track [Page 28]
RFC 4292 IP Forwarding Table MIB April 2006
ipForwardMetric3 OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-create
STATUS obsolete
DESCRIPTION
"An alternate routing metric for this route. The
semantics of this metric are determined by the routing-
protocol specified in the route's ipForwardProto value.
If this metric is not used, its value should be set to
-1."
DEFVAL { -1 }
::= { ipForwardEntry 13 }
ipForwardMetric4 OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-create
STATUS obsolete
DESCRIPTION
"An alternate routing metric for this route. The
semantics of this metric are determined by the routing-
protocol specified in the route's ipForwardProto value.
If this metric is not used, its value should be set to
-1."
DEFVAL { -1 }
::= { ipForwardEntry 14 }
ipForwardMetric5 OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-create
STATUS obsolete
DESCRIPTION
"An alternate routing metric for this route. The
semantics of this metric are determined by the routing-
protocol specified in the route's ipForwardProto value.
If this metric is not used, its value should be set to
-1."
DEFVAL { -1 }
::= { ipForwardEntry 15 }
-- Obsoleted Definitions - Groups
-- compliance statements
ipForwardOldCompliance MODULE-COMPLIANCE
STATUS obsolete
DESCRIPTION
"The compliance statement for SNMP entities that
implement the ipForward MIB."
Haberman Standards Track [Page 29]
RFC 4292 IP Forwarding Table MIB April 2006
MODULE -- this module
MANDATORY-GROUPS { ipForwardMultiPathGroup }
::= { ipForwardCompliances 2 }
ipForwardMultiPathGroup OBJECT-GROUP
OBJECTS { ipForwardNumber,
ipForwardDest, ipForwardMask, ipForwardPolicy,
ipForwardNextHop, ipForwardIfIndex, ipForwardType,
ipForwardProto, ipForwardAge, ipForwardInfo,
ipForwardNextHopAS,
ipForwardMetric1, ipForwardMetric2, ipForwardMetric3,
ipForwardMetric4, ipForwardMetric5
}
STATUS obsolete
DESCRIPTION
"IP Multipath Route Table."
::= { ipForwardGroups 2 }
END
6. Security Considerations
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. These are the tables and objects and their
sensitivity/vulnerability:
1. The inetCidrRouteTable contains routing and forwarding
information that is critical to the operation of the network
node (especially routers). Allowing unauthenticated write
access to this table can compromise the validity of the
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 and/or NOTIFY access to these objects and possibly
to even encrypt the values of these objects when sending them over
the network via SNMP. These are the tables and objects and their
sensitivity/vulnerability:
1. The inetCidrRouteTable contains routing and forwarding
information that can be used to compromise a network.
Haberman Standards Track [Page 30]
RFC 4292 IP Forwarding Table MIB April 2006
Specifically, this table can be used to construct a map of the
network in preparation for a denial-of-service attack on the
network infrastructure.
2. The inetCidrRouteProto object identifies the routing protocols
in use within a network. This information can be used to
determine how a denial-of-service attack should be launched.
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/SET (read/change/create/delete) 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 or SET (change/create/delete) them.
7. Changes from RFC 2096
This document obsoletes RFC 2096 in the following ways:
1. Replaces ipCidrRouteTable with inetCidrRouteTable. This
applies to corresponding objects and conformance statements.
2. Utilizes the InetAddress TC to support IP version-independent
implementations of the forwarding MIB. This gives common
forwarding MIB support for IPv4 and IPv6.
3. Creates a read-only conformance statement to support
implementations that only wish to retrieve data.
4. Creates the inetCidrRouteDiscards object to replace the
deprecated ipRoutingDiscards and ipv6DiscardedRoutes objects.
The inetCidrRouteTable retains the logical structure of the
ipCidrRouteTable in order to allow the easy upgrade of existing IPv4
implementations to the version-independent MIB.
Haberman Standards Track [Page 31]
RFC 4292 IP Forwarding Table MIB April 2006
8. Normative References
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC2578] McCloghrie, K., Perkins, D., and J. Schoenwaelder,
"Structure of Management Information Version 2 (SMIv2)",
STD 58, RFC 2578, April 1999.
[RFC2579] McCloghrie, K., Perkins, D., and J. Schoenwaelder, "Textual
Conventions for SMIv2", STD 58, RFC 2579, April 1999.
[RFC2580] McCloghrie, K., Perkins, D., and J. Schoenwaelder,
"Conformance Statements for SMIv2", STD 58, RFC 2580, April
1999.
[RFC2863] McCloghrie, K. and F. Kastenholz, "The Interfaces Group
MIB", RFC 2863, June 2000.
[RFC4001] Daniele, M., Haberman, B., Routhier, S., and J.
Schoenwaelder, "Textual Conventions for Internet Network
Addresses", RFC 4001, February 2005.
[RFC4293] Routhier, S., Ed., "Management Information Base for the
Internet Protocol (IP), RFC 4293, April 2006.
[RTPROTO] IANA, "IP Route Protocol MIB",
http://www.iana.org/assignments/ianaiprouteprotocol-mib,
September 2000.
9. Informative References
[RFC1213] McCloghrie, K. and M. Rose, "Management Information Base
for Network Management of TCP/IP-based internets: MIB-II",
RFC 1213, March 1991.
[RFC1354] Baker, F., "IP Forwarding Table MIB", RFC 1354, July 1992.
[RFC2011] McCloghrie, K., Editor, "SNMPv2 Management Information Base
for the Internet Protocol using SMIv2", RFC 2011, November
1996.
[RFC2096] Baker, F., "IP Forwarding Table MIB", RFC 2096, January
1997.
[RFC3410] Case, J., Mundy, R., Partain, D., and B. Stewart,
"Introduction and Applicability Statements for Internet-
Standard Management Framework", RFC 3410, December 2002.
Haberman Standards Track [Page 32]
RFC 4292 IP Forwarding Table MIB April 2006
[RFC2465] Haskin, D. and S. Onishi, Management Information Base for
IP Version 6: Textual Conventions and General Group", RFC
2465, December 1998.
10. Authors and Acknowledgements
This document was based on RFC 2096 [RFC2096].
The following people provided text for this version of the document,
or were authors of previous versions:
Fred Baker, Cisco
Bill Fenner, AT&T Research
Brian Haberman, Johns Hopkins University - Applied Physics Laboratory
Juergen Schoenwalder, TU Braunschweig
Dave Thaler, Microsoft
Margaret Wasserman, Thingmagic
Dario Accornero, Mark Adam, Qing Li, and Shawn Routhier reviewed the
document and provided helpful feedback.
Mike Heard provided valuable feedback as the MIB Doctor for this
document.
Editors' Contact Information
Comments or questions regarding this document should be sent to:
Brian Haberman
Johns Hopkins University - Applied Physics Laboratory
Mailstop 17-S442
11100 Johns Hopkins Road
Laurel MD, 20723-6099 USA
Phone: +1-443-778-1319
EMail: brian@innovationslab.net
Haberman Standards Track [Page 33]
RFC 4292 IP Forwarding Table MIB April 2006
Full Copyright Statement
Copyright (C) The Internet Society (2006).
This document is subject to the rights, licenses and restrictions
contained in BCP 78, and except as set forth therein, the authors
retain all their rights.
This document and the information contained herein are provided on an
"AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS
OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY AND THE INTERNET
ENGINEERING TASK FORCE DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE
INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
Intellectual Property
The IETF takes no position regarding the validity or scope of any
Intellectual Property Rights or other rights that might be claimed to
pertain to the implementation or use of the technology described in
this document or the extent to which any license under such rights
might or might not be available; nor does it represent that it has
made any independent effort to identify any such rights. Information
on the procedures with respect to rights in RFC documents can be
found in BCP 78 and BCP 79.
Copies of IPR disclosures made to the IETF Secretariat and any
assurances of licenses to be made available, or the result of an
attempt made to obtain a general license or permission for the use of
such proprietary rights by implementers or users of this
specification can be obtained from the IETF on-line IPR repository at
http://www.ietf.org/ipr.
The IETF invites any interested party to bring to its attention any
copyrights, patents or patent applications, or other proprietary
rights that may cover technology that may be required to implement
this standard. Please address the information to the IETF at
ietf-ipr@ietf.org.
Acknowledgement
Funding for the RFC Editor function is provided by the IETF
Administrative Support Activity (IASA).
Haberman Standards Track [Page 34]
RFC, FYI, BCP