Internet-Draft M. Wasserman, Editor Document: draft-ietf-ipv6-rfc2096-update-02.txt Wind River Expires: May 2002 November 2002 IP Forwarding Table MIB 1 Status of this Memo This document is an Internet-Draft and is in full conformance with all provisions of Section 10 of RFC2026. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet- Drafts. 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." The list of current Internet-Drafts can be accessed at http://www.ietf.org/ietf/1id-abstracts.txt The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html. This document is a product of the IPv6 MIB Revision Design Team and it is a working item of the IPv6 Working Group. Comments should be addressed to the editor, or to the IPv6 Working Group mailing list at ipng@sunroof.eng.sun.com. 2 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. 3 Copyright Notice Copyright (C) The Internet Society (2001). All Rights Reserved. 4 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]. Wasserman Expires December 2002 1 IP Forwarding Table MIB November 2002 5 Table of Contents 1 Status of this Memo.......................................1 2 Abstract..................................................1 3 Copyright Notice..........................................1 4 Conventions Used In This Document.........................1 5 Table of Contents.........................................2 6 Revision History..........................................2 7 The SNMP Management Framework.............................4 8 Overview..................................................5 9 Definitions...............................................6 10 Security Considerations..................................27 11 References...............................................28 12 Authors and Acknowledgements.............................30 13 Editor's Contact Information.............................30 14 Full Copyright Statement.................................30 6 Revision History Changes from draft-ietf-ipv6-rfc-2096-update-01.txt: 02 Nov 2002 Fixed bugs that caused the MIB not to compile. Changed the type of inetCidrRouteDscp to Dscp. Improved the revision information. Removed inetCidrRouteNumber and inetCidrRouteWeight. Other editorial changes. Changes from draft-ietf-ipv6-rfc-2096-update-00.txt: 22 Aug 2002 Minor editorial changes and clean-up Changes from draft-ietf-ipngwg-rfc-2096-update-00.txt: 27 Jun 2002 Added inetCidrRouteDscp index and inetCidrRouteWeight object to the inetCidrRouteTable. Restored inetCidrRouteNextHopType variable (may be different from inetCidrRouteDestType, due to global vs. non-global distinction in new InetAddress TCs). Removed inetCidrRouteInstance object. Use to identify a conceptual routing table is obviated by new InetAddress types and inclusion of DSCP index. Changed editor, moved author information to end, several editorial changes. Wasserman, Editor Expires December 2002 2 IP Forwarding Table MIB November 2002 Changed name to draft-ietf-ipv6-rfc-2096-update-*.txt 13 Jul 2002 Removed inetCidrRouteNextHopType. Changes from draft-ops-rfc2096-update-00.txt: 12 Jul 2001 Renamed to IPNG working group draft Added scopes to the uses of instance Added inetCidrRouteDiscards to replace ipRoutingDiscards Fixed some remaining ipCidr*/inetCidr* confusion in DESCRIPTIONs Changes from first draft posted to v6mib mailing list: 23 Feb 2001 Updated MODULE-IDENTITY Deleted inetCidrRouteTos, add inetCidrRouteInstance in INDEX of inetCidrRouteTable. Used InterfaceIndex, InetAddressPrefixLength and InetAutonomousSystemNumber TC's, and limited the SIZE of inetCidrRouteDest and inetCidrRouteNextHop Updated conformance info. Added copyright and table of contents. Wasserman, Editor Expires December 2002 3 IP Forwarding Table MIB November 2002 7 The SNMP Management Framework The SNMP Management Framework presently consists of five major components: - An overall architecture, described in RFC 2571 [2]. - Mechanisms for describing and naming objects and events for the purpose of management. The first version of this Structure of Management Information (SMI) is called SMIv1 and described in STD 16, RFC 1155 [3], STD 16, RFC 1212 [4] and RFC 1215 [5]. The second version, called SMIv2, is described in STD 58, RFC 2578 [6], STD 58, RFC 2579 [7] and STD 58, RFC 2580 [8]. - Message protocols for transferring management information. The first version of the SNMP message protocol is called SNMPv1 and described in STD 15, RFC 1157 [9]. A second version of the SNMP message protocol,which is not an Internet standards track protocol, is called SNMPv2c and described in RFC 1901 [10] and RFC 1906 [11]. The third version of the message protocol is called SNMPv3 and described in RFC 1906 [11],RFC 2572 [12] and RFC 2574 [13]. - Protocol operations for accessing management information. The first set of protocol operations and associated PDU formats is described in STD 15, RFC 1157 [9]. A second set of protocol operations and associated PDU formats is described in RFC 1905 [14]. - A set of fundamental applications described in RFC 2573 [15] and the view-based access control mechanism described in RFC 2575 [16]. A more detailed introduction to the current SNMP Management framework can be found in RFC 2570 [17]. Managed objects are accessed via a virtual information store, termed the Management Information Base or MIB. Objects in the MIB are defined using the mechanisms defined in the SMI. This memo specifies a MIB module that is compliant to the SMIv2. A MIB conforming to the SMIv1 can be produced through the appropriate translations. The resulting translated MIB must be semantically equivalent, except where objects or events are omitted because no translation is possible (use of Counter64). Some machine readable information in SMIv2 will be converted into textual descriptions in SMIv1 during the translation process. However, this loss of machine readable information is not considered to change the semantics of the MIB. Wasserman, Editor Expires December 2002 4 IP Forwarding Table MIB November 2002 8 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 for any reason. 3. The inetCidrRouteTable provides the ability to display IP version independent multipath CIDR routes. In addition, there is one deprecated table and object, and one obsolete table and object, representing previous revisions of this MIB. 1. The obsolete object ipForwardNumber represents the number of entries in the obsolete ipForwardTable. 2. The obsolete ipForwardTable updates the RFC 1213 ipRouteTable to display multipath IP Routes. This is in turn obsoleted by the ipCidrRouteTable. 3. The deprecated object ipCidrRouteNumber represents the number of entries in the deprecated ipCidrRouteTable. 4. The deprecated ipCidrRouteTable updates the RFC 1213 ipRouteTable to display multipath IP Routes having the same network number but differing network masks. Wasserman, Editor Expires December 2002 5 IP Forwarding Table MIB November 2002 9 Definitions IP-FORWARD-MIB DEFINITIONS ::= BEGIN IMPORTS MODULE-IDENTITY, OBJECT-TYPE, IpAddress, Integer32, Gauge32, Unsigned32, Counter32 FROM SNMPv2-SMI RowStatus FROM SNMPv2-TC MODULE-COMPLIANCE, OBJECT-GROUP FROM SNMPv2-CONF InterfaceIndex FROM IF-MIB ip FROM IP-MIB IANAipRouteProtocol FROM IANA-RTPROTO-MIB InetAddress, InetAddressType, InetAddressPrefixLength, InetAutonomousSystemNumber FROM INET-ADDRESS-MIB Dscp FROM DIFFSERV-DSCP-TC; ipForward MODULE-IDENTITY LAST-UPDATED "200107130000Z" ORGANIZATION "IETF IPv6 MIB Revision Team" CONTACT-INFO "Editor: Margaret Wasserman Wind River 10 Tara Blvd, Suite 330 Nashua, NH 03062 Phone: +1 603 897-2067 Email: <mrw@windriver.com>" DESCRIPTION "The MIB module for the management of CIDR multipath IP Routes." REVISION "200206270000Z" 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. published as RFC XXXX." REVISION "9609190000Z" DESCRIPTION "Revised to support CIDR routes." ::= { ip 24 } inetCidrRouteDiscards OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of routing entries which were chosen to be discarded even though they are valid. One possible reason for discarding such an entry could be to free-up Wasserman, Editor Expires December 2002 6 IP Forwarding Table MIB November 2002 buffer space for other routing 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 "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." INDEX { inetCidrRouteDestType, inetCidrRouteDest, inetCidrRoutePfxLen, inetCidrRouteDscp, inetCidrRouteNextHopType, inetCidrRouteNextHop } ::= { inetCidrRouteTable 1 } InetCidrRouteEntry ::= SEQUENCE { inetCidrRouteDestType InetAddressType, inetCidrRouteDest InetAddress, inetCidrRoutePfxLen InetAddressPrefixLength, inetCidrRouteDscp Dscp, inetCidrRouteNextHopType InetAddressType, inetCidrRouteNextHop InetAddress, inetCidrRouteIfIndex InterfaceIndex, inetCidrRouteType INTEGER, inetCidrRouteProto IANAipRouteProtocol, inetCidrRouteAge Integer32, inetCidrRouteNextHopAS InetAutonomousSystemNumber, inetCidrRouteMetric1 Integer32, inetCidrRouteMetric2 Integer32, inetCidrRouteMetric3 Integer32, inetCidrRouteMetric4 Integer32, inetCidrRouteMetric5 Integer32, inetCidrRouteStatus RowStatus Wasserman, Editor Expires December 2002 7 IP Forwarding Table MIB November 2002 } inetCidrRouteDestType OBJECT-TYPE SYNTAX InetAddressType MAX-ACCESS not-accessible STATUS current DESCRIPTION "The type of the inetCidrRouteDest address, as defined in the InetAddress MIB [19]" ::= { inetCidrRouteEntry 1 } inetCidrRouteDest OBJECT-TYPE SYNTAX InetAddress (SIZE(0..36)) MAX-ACCESS not-accessible STATUS current DESCRIPTION "The destination IP address of this route. 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 mask formed from the corresponding instance of the inetCidrRoutePfxLen object is not equal to x." ::= { inetCidrRouteEntry 2 } inetCidrRoutePfxLen OBJECT-TYPE SYNTAX InetAddressPrefixLength MAX-ACCESS not-accessible STATUS current DESCRIPTION "Indicates the number of leading one bits which form the mask to be logical-ANDed with the destination address before being compared to the value in the inetCidrRouteDest field. Any assignment (implicit or otherwise) of an instance of this object to a value x MUST be rejected if the bitwise logical-AND of the mask formed from x with the value of the corresponding instance of the inetCidrRouteDest object is not equal to inetCidrRouteDest." ::= { inetCidrRouteEntry 3 } inetCidrRouteDscp OBJECT-TYPE SYNTAX Dscp MAX-ACCESS not-accessible STATUS current DESCRIPTION "Indicates the Differentiated Services Code Point (DSCP) [18] to which the routing information in this entry applies." ::= { inetCidrRouteEntry 4 } inetCidrRouteNextHopType OBJECT-TYPE Wasserman, Editor Expires December 2002 8 IP Forwarding Table MIB November 2002 SYNTAX InetAddressType MAX-ACCESS not-accessible STATUS current DESCRIPTION "The type of the inetCidrRouteNextHop address, as defined in the InetAddress MIB [19]. Value should be set to unknown(0) for non-remote routes." ::= { inetCidrRouteEntry 5 } inetCidrRouteNextHop OBJECT-TYPE SYNTAX InetAddress (SIZE(0..36)) MAX-ACCESS not-accessible STATUS current DESCRIPTION "On remote routes, the address of the next system en route. For non-remote routes, a zero length string." ::= { inetCidrRouteEntry 6 } inetCidrRouteIfIndex OBJECT-TYPE SYNTAX InterfaceIndex MAX-ACCESS read-create STATUS current DESCRIPTION "The ifIndex value which identifies the local interface through which the next hop of this route should be reached." ::= { inetCidrRouteEntry 7 } inetCidrRouteType OBJECT-TYPE SYNTAX INTEGER { other (1), -- not specified by this MIB reject (2), -- route which discards traffic and -- returns ICMP notification local (3), -- local interface remote (4), -- remote destination blackhole(5) -- route which 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 which 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 which, if matched, discards the message as unreachable and returns a notification Wasserman, Editor Expires December 2002 9 IP Forwarding Table MIB November 2002 (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 which, if matched, discards the message silently." ::= { inetCidrRouteEntry 8 } 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 Integer32 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." Wasserman, Editor Expires December 2002 10 IP Forwarding Table MIB November 2002 DEFVAL { -1 } ::= { 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- 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 } Wasserman, Editor Expires December 2002 11 IP Forwarding Table MIB November 2002 inetCidrRouteStatus OBJECT-TYPE SYNTAX RowStatus MAX-ACCESS read-create STATUS current DESCRIPTION "The row status variable, used according to row installation and removal conventions." ::= { inetCidrRouteEntry 17 } -- Conformance information ipForwardConformance OBJECT IDENTIFIER ::= { ipForward 5 } ipForwardGroups OBJECT IDENTIFIER ::= { ipForwardConformance 1 } ipForwardCompliances OBJECT IDENTIFIER ::= { ipForwardConformance 2 } -- Compliance statements ipForwardCompliance2 MODULE-COMPLIANCE STATUS current DESCRIPTION "The compliance statement for systems which have routing tables." MODULE -- this module MANDATORY-GROUPS { inetForwardCidrRouteGroup } ::= { ipForwardCompliances 3 } -- units of conformance inetForwardCidrRouteGroup OBJECT-GROUP OBJECTS { inetCidrRouteDiscards, inetCidrRouteIfIndex, inetCidrRouteType, inetCidrRouteProto, inetCidrRouteAge, inetCidrRouteNextHopAS, inetCidrRouteMetric1, inetCidrRouteMetric2, inetCidrRouteMetric3, inetCidrRouteMetric4, inetCidrRouteMetric5, inetCidrRouteStatus } 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 Wasserman, Editor Expires December 2002 12 IP Forwarding Table MIB November 2002 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, and 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 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, Wasserman, Editor Expires December 2002 13 IP Forwarding Table MIB November 2002 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 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 Wasserman, Editor Expires December 2002 14 IP Forwarding Table MIB November 2002 "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" ::= { 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 which 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 which discards traffic local (3), -- local interface remote (4) -- remote destination } MAX-ACCESS read-create STATUS deprecated DESCRIPTION Wasserman, Editor Expires December 2002 15 IP Forwarding Table MIB November 2002 "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 which 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 which, if matched, discards the message as unreachable. This is used in some protocols as a means of correctly aggregating routes." ::= { ipCidrRouteEntry 6 } 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 Wasserman, Editor Expires December 2002 16 IP Forwarding Table MIB November 2002 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 STATUS deprecated DESCRIPTION "A reference to MIB definitions specific to the particular routing protocol which 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- Wasserman, Editor Expires December 2002 17 IP Forwarding Table MIB November 2002 protocol specified in the route's ipCidrRouteProto value. If this metric is not used, its value should be 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 "The row status variable, used according to row installation and removal conventions." ::= { ipCidrRouteEntry 16 } Wasserman, Editor Expires December 2002 18 IP Forwarding Table MIB November 2002 -- compliance statements ipForwardCompliance MODULE-COMPLIANCE STATUS deprecated DESCRIPTION "The compliance statement for SNMPv2 entities which implement the ipForward MIB." 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." ::= { ipForwardGroups 3 } -- Obsoleted Definitions - Objects ipForwardNumber OBJECT-TYPE SYNTAX Gauge32 MAX-ACCESS read-only STATUS obsolete DESCRIPTION "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 Wasserman, Editor Expires December 2002 19 IP Forwarding Table MIB November 2002 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, 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 Wasserman, Editor Expires December 2002 20 IP Forwarding Table MIB November 2002 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 -- 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 | | | | | +-----+-----+-----+-----+-----+-----+-----+-----+ Wasserman, Editor Expires December 2002 21 IP Forwarding Table MIB November 2002 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 which 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 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 which 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. Wasserman, Editor Expires December 2002 22 IP Forwarding Table MIB November 2002 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 } 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 Wasserman, Editor Expires December 2002 23 IP Forwarding Table MIB November 2002 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 DESCRIPTION "A reference to MIB definitions specific to the particular routing protocol which 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 Wasserman, Editor Expires December 2002 24 IP Forwarding Table MIB November 2002 -1." DEFVAL { -1 } ::= { ipForwardEntry 12 } 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 which implement the ipForward MIB." MODULE -- this module MANDATORY-GROUPS { ipForwardMultiPathGroup } Wasserman, Editor Expires December 2002 25 IP Forwarding Table MIB November 2002 ::= { 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 Wasserman, Editor Expires December 2002 26 IP Forwarding Table MIB November 2002 10 Security Considerations There are a number of management objects defined in this MIB that have 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. There are a number of managed objects in this MIB that may contain sensitive information. These are: The routing table can be used to discover information about the network topology within a domain. It is thus important to control even GET access to these objects and possibly to even encrypt the values of these object when sending them over the network via SNMP. Not all versions of SNMP provide features for such a secure environment. SNMPv1 by itself is not a secure environment. Even if the network itself is secure (for example by using IPSec), even then, there is no control as to whom on the secure network is allowed to access and GET/SET (read/change/create/delete) the objects in this MIB. It is recommended that the implementers consider the security features as provided by the SNMPv3 framework. Specifically, the use of the User-based Security Model RFC 2574 [13] and the View- based Access Control Model RFC 2575 [16] is recommended. It is then a customer/user responsibility to ensure that the SNMP entity giving access to an instance of this MIB, 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. Wasserman, Editor Expires December 2002 27 IP Forwarding Table MIB November 2002 11 References [RFC2026] S. Bradner, "The Internet Standards Process -- Revision 3", RFC 2026, BCP9, October 1996 [RFC2119] S. Bradner, "Key words for use in RFCs to Indicate Requirement Levels", RFC 2119, BCP14, March 1999. [1] F. Baker, "IP Forwarding Table MIB", RFC 2096, January 1997. [2] Harrington, D., Presuhn, R., and B. Wijnen, "An Architecture for Describing SNMP Management Frameworks", RFC 2571, April 1999. [3] Rose, M., and K. McCloghrie, "Structure and Identification of Management Information for TCP/IP-based Internets", STD 16, RFC 1155, May 1990. [4] Rose, M., and K. McCloghrie, "Concise MIB Definitions", STD 16, RFC 1212, March 1991. [5] Rose, M., "A Convention for Defining Traps for use with the SNMP", RFC 1215, March 1991. [6] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J., Rose, M., and S. Waldbusser, "Structure of Management Information Version 2 (SMIv2)", STD 58, RFC 2578, April 1999. [7] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J., Rose, M., and S. Waldbusser, "Textual Conventions for SMIv2", STD 58, RFC 2579, April 1999. [8] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J., Rose, M., and S. Waldbusser, "Conformance Statements for SMIv2", STD 58, RFC 2580, April 1999. [9] Case, J., Fedor, M., Schoffstall, M., and J. Davin, "Simple Network Management Protocol", STD 15, RFC 1157, May 1990. [10] Case, J., McCloghrie, K., Rose, M., and S. Waldbusser, Wasserman, Editor Expires December 2002 28 IP Forwarding Table MIB November 2002 "Introduction to Community-based SNMPv2", RFC 1901, January 1996. [11] Case, J., McCloghrie, K., Rose, M., and S. Waldbusser, "Transport Mappings for Version 2 of the Simple Network Management Protocol (SNMPv2)", RFC 1906, January 1996. [12] Case, J., Harrington D., Presuhn R., and B. Wijnen, "Message Processing and Dispatching for the Simple Network Management Protocol (SNMP)", RFC 2572, April 1999. [13] Blumenthal, U., and B. Wijnen, "User-based Security Model (USM) for version 3 of the Simple Network Management Protocol (SNMPv3)", RFC 2574, April 1999. [14] Case, J., McCloghrie, K., Rose, M., and S. Waldbusser, "Protocol Operations for Version 2 of the Simple Network Management Protocol (SNMPv2)", RFC 1905, January 1996. [15] Levi, D., Meyer, P., and B. Stewart, "SNMPv3 Applications", RFC 2573, April 1999. [16] Wijnen, B., Presuhn, R., and K. McCloghrie, "View-based Access Control Model (VACM) for the Simple Network Management Protocol (SNMP)", RFC 2575, April 1999. [17] Case, J., Mundy, R., Partain, D., and B. Stewart, "Introduction to Version 3 of the Internet-standard Network Management Framework",RFC 2570, April 1999. [18] Nichols, K., Blake, S., Baker, F., Black, D., "Definition of the Differentiated Services Field (DS Field) in the IPv4 and IPv6 Headers", RFC 2474, December 1998. [19] Daniele, M., Haberman, B., Routhier, S., Schoenwaelder, J., "Textual Conventions for Internet Network Addresses", RFC 3291, May2002 Wasserman, Editor Expires December 2002 29 IP Forwarding Table MIB November 2002 12 Authors and Acknowledgements This document was based on RFC 2096 [1]. 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 Juergen Schoenwalder, TU Braunschweig Dave Thaler, Microsoft Dario Accornero, Mark Adam, Qing Li and Shawn Routhier reviewed the document and provided helpful feedback. 13 Editor's Contact Information Comments or questions regarding this document should be sent to: Margaret Wasserman Wind River 10 Tara Blvd., Suite 330 Phone: (603) 897-2067 Nashua, NH 03062 USA Email: mrw@windriver.com 14 Full Copyright Statement Copyright (C) The Internet Society (2002). All Rights Reserved. This document and translations of it may be copied and furnished to others, and derivative works that comment on or otherwise explain it or assist in its implementation may be prepared, copied, published and distributed, in whole or in part, without restriction of any kind, provided that the above copyright notice and this paragraph are included on all such copies and derivative works. However, this document itself may not be modified in any way, such as by removing the copyright notice or references to the Internet Society or other Internet organizations, except as needed for the purpose of developing Internet standards in which case the procedures for copyrights defined in the Internet Standards process must be followed, or as required to translate it into languages other than English. The limited permissions granted above are perpetual and will not be revoked by the Internet Society or its successors or assigns. This document and the information contained herein is provided on an "AS IS" basis and 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. Wasserman, Editor Expires December 2002 30
Datatracker
draft-ietf-ipv6-rfc2096-update-02
Internet-Draft
