RFC3020
Network Working Group P. Pate Request for Comments: 3020 B. Lynch Category: Standards Track Overture Networks
K. Rehbehn
Megisto Systems, Inc.
December 2000
Definitions of Managed Objects
for Monitoring and Controlling the
UNI/NNI Multilink Frame Relay Function
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 (2000). All Rights Reserved.
Abstract
This memo defines a Management Information Base (MIB) for monitoring and controlling a UNI/NNI Multilink Frame Relay Function as defined in Frame Relay Forum FRF.16. This MIB also includes conformance and notification information.
Contents
- 1 The SNMP Management Framework
- 2 Overview
- 2.1 Multilink Frame Relay Background
- 2.2 Structure of the MIB
- 2.3 Relationship With Other MIBS and Tables
- 2.4 Creation Of Bundles and Bundle Links
- 2.5 Notifications
- 3 Object Definitions
- 4 Acknowledgments
- 5 References
- 6 Security Considerations
- 7 Authors' Addresses
- 8 Full Copyright Statement
The SNMP Management Framework
The SNMP Management Framework presently consists of five major components:
o An overall architecture, described in RFC 2571 RFC2571.
o 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 RFC1155, STD 16, RFC 1212 RFC1212 and RFC 1215 RFC1215. The second version, called SMIv2, is described in STD 58: RFC 2578 RFC2578, RFC 2579 RFC2579 and RFC 2580 RFC2580.
o Message protocols for transferring management information. The
first version of the SNMP message protocol is called SNMPv1 and described in STD 15, RFC 1157 RFC1157. A second version of the SNMP message protocol, which is not an Internet standards track protocol, is called SNMPv2c and described in RFC 1901 RFC1901 and RFC 1906 RFC1906. The third version of the message protocol is called SNMPv3 and described in RFC 1906 RFC1906, RFC 2572 RFC2572 and RFC 2574 RFC2574.
o Protocol operations for accessing management information. The
first set of protocol operations and associated PDU formats is described in STD 15, RFC 1157 RFC1157. A second set of protocol operations and associated PDU formats is described in RFC 1905 RFC1905.
o A set of fundamental applications described in RFC 2573 RFC2573
and the view-based access control mechanism described in RFC 2575 RFC2575.
A more detailed introduction to the current SNMP Management Framework can be found in RFC 2570 RFC2570.
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.
Overview
This document defines a Management Information Base (MIB) for monitoring and controlling the UNI/NNI Multilink Frame Relay function. The agreement on which this MIB is based was defined and documented by the Frame Relay Forum in the Frame Relay Forum Document FRF.16 [FRF.16].
Multilink Frame Relay Background
Multilink Frame Relay (MFR) for the User-to-Network Interface (UNI) and the Network-to-Network Interface (NNI) provides physical interface emulation for frame relay devices. The emulated physical interface consists of one or more physical links, called "bundle links", aggregated together into a single "bundle" of bandwidth. This service provides a frame-based inverse multiplexing function, sometimes referred to as an "IMUX".
The bundle provides the same order-preserving service as a physical layer for frames sent on a data link connection. In addition, the bundle provides support for all Frame Relay services based on UNI and NNI standards.
Terminology
Physical Link -- A single physical interface that interconnects
two devices in a frame relay network (e.g., DS1,
DS0, Bearer channel, refer to FRF.14).
Bundle -- A grouping of one or more physical links using
the formats and procedures of multilink frame
relay. The bundle operates as a logical
interface function that emulates a single
physical interface to the Q.922 data link layer.
Bundle Link -- A MFR sub-component that controls operation of
one of the bundle's physical links.
Reference Model
+--------------------------+ +--------------------------+ | Switching Layer -OR- | | Switching Layer -OR- | | Higher-Level Applications| | Higher-Level Applications| +--------------------------+ +--------------------------+ | |C-Plane - Q.933| | |C-Plane - Q.933| | U-Plane | (Note 1) | | U-Plane | (Note 1) | | (Note 3) |---------------| | (Note 3) |---------------| | |Q.922 (Note 2) | | |Q.922 (Note 2) | +--------------------------+ +--------------------------+ | Data Link Layer (Q.922) | | Data Link Layer (Q.922) | +--------------------------+ +--------------------------+ | Bundle (B) | | Bundle (B) | +--------------------------+ +--------------------------+ | Bundle | Bundle | Bundle | | Bundle | Bundle | Bundle | | Link | Link | Link | | Link | Link | Link | | (BL) | (BL) | (BL) | | (BL) | (BL) | (BL) | +--------+--------+--------+ +--------+--------+--------+ |Physical|Physical|Physical| |Physical|Physical|Physical| | (PH) | (PH) | (PH) | __________ | (PH) | (PH) | (PH) | +----+---+----+---+----+---+ /\ \ +----+---+----+---+----+---+
| | | / \ \ | | |
| | +--------\ \-----+ | |
| | / \ \ | |
| +-------------------\ \------------+ |
| _________\_______/ Bundle /_ |
| /\ / / \ |
+------------| Bundle Link / / |------------------+
\/_____________/ /____/
\/__________/
Figure 1: MFR Reference Diagram
Note 1: C-Plane operation as described in Q.933 [Q.933] and FRF.4 [FRF.4]
Note 2: Multiple frame acknowledged information transfer mode as described in Q.922 [Q.922]
Note 3: Core aspects for use with frame relay bearer service as described in Q.922, Annex A [Q.922]
Structure of the MIB
The UNI/NNI MFR managed objects consist of two scalar objects and three tables.
mfrBundleMaxNumBundles
This scalar is used to inform the manager of the maximum number of bundles supported by this device.
mfrBundleNextIndex
This scalar is used to assist the manager in selecting a value for mfrBundleIndex during row creation. It can also be used to avoid race conditions with multiple managers trying to create rows in the table (see RFC 2494 RFC2494 for one such algorithm).
mfrBundleTable
This table provides a means to configure and monitor bundles. It is indexed by mfrBundleIndex and contains these columns:
- mfrBundleIndex Integer32 - mfrBundleIfIndex InterfaceIndex - mfrBundleRowStatus RowStatus - mfrBundleNearEndName SnmpAdminString - mfrBundleFragmentation INTEGER - mfrBundleMaxFragSize Integer32 - mfrBundleTimerHello INTEGER - mfrBundleTimerAck INTEGER - mfrBundleCountMaxRetry INTEGER - mfrBundleActivationClass INTEGER - mfrBundleThreshold Integer32 - mfrBundleMaxDiffDelay Integer32 - mfrBundleSeqNumSize INTEGER - mfrBundleLinksConfigured Integer32 - mfrBundleLinksActive Integer32 - mfrBundleBandwidth Integer32 - mfrBundleFarEndName SnmpAdminString - mfrBundleResequencingErrors Counter32
Bundle-to-ifIndex Mapping Table
This table provides a means to take an ifIndex and find the corresponding mfrBundleIndex. It is indexed by ifIndex and contains these columns:
- mfrBundleIfIndexMapping Integer32
mfrBundleLinkTable
This table provides a means to configure and monitor bundle links. It is indexed by ifIndex and contains these columns:
- mfrBundleLinkRowStatus RowStatus - mfrBundleLinkConfigBundleIndex Integer32 - mfrBundleLinkNearEndName SnmpAdminString - mfrBundleLinkState MfrBundleLinkState - mfrBundleLinkFarEndName SnmpAdminString - mfrBundleLinkFarEndBundleName SnmpAdminString - mfrBundleLinkDelay Integer32 - mfrBundleLinkFramesControlTx Counter32 - mfrBundleLinkFramesControlRx Counter32 - mfrBundleLinkFramesControlInvalid Counter32 - mfrBundleLinkTimerExpiredCount Counter32 - mfrBundleLinkLoopbackSuspected Counter32 - mfrBundleLinkUnexpectedSequence Counter32 - mfrBundleLinkMismatch Counter32
Relationship With Other MIBS and Tables
Relationship With Interface Table
Bundle Links
Each bundle link will appear as an interface in the ifTable. The ifIndex that appears in the ifTable is used for indexing the bundle link tables in the UNI-NNI MFR MIB.
Bundles
Each bundle will appear as an interface in the ifTable. There will be corresponding mfrBundleIndex which may be different than the ifIndex of the bundle.
The reason is best summarized in RFC 2494 RFC2494, which describes frame relay bundle of DS0. It says:
This table is not indexed by ifIndex because the manager has to choose the index in a createable row and the agent must be allowed to select ifIndex values.
The rows in the ifEntry table are not createable as they do not have row status. RFC 2863 RFC2863 suggests that the ifIndex should be chosen by the agent. Here is its statement regarding row creation and deletion:
While some interfaces, for example, most physical interfaces, cannot be created via network management, other interfaces such as logical interfaces sometimes can be. The ifTable contains only generic information about an interface. Almost all 'create-able' interfaces have other, media-specific, information through which
configuration parameters may be supplied prior to creating such an interface. Thus, the ifTable does not itself support the creation or deletion of an interface (specifically, it has no RowStatus column). Rather, if a particular interface type supports the dynamic creation and/or deletion of an interface of that type, then that media-specific MIB should include an appropriate RowStatus object (see the ATM LAN-Emulation Client MIB [ATMLANE] for an example of a MIB which does this). Typically, when such a RowStatus object is created/deleted, then the conceptual row in the ifTable appears/disappears as a by-product, and an ifIndex value (chosen by the agent) is stored in an appropriate object in the media-specific MIB.
The ATM LAN-Emulation Client MIB [ATMLANE] uses different indices and so does the IMA MIB [ATMIMA]. Looking at the examples we have, and the statements from RFC, it seems better to have two indices. This gives the SNMP agent implementor the freedom to manage their ifIndex in the way they like.
Mapping Between ifIndex and mfrBundleIndex
The mfrBundleIfIndexMappingTable is indexed by ifIndex and provides the means to map a given ifIndex into the corresponding mfrBundleIndex. The mfrBundleIfIndexMapping object in the mfrBundleTable (indexed by mfrBundleIndex) provides the reverse mapping of a mfrBundleIndex to the corresponding ifIndex in the ifTable.
ifTable Objects
The bundle configuration and status table. There is a one-to-one correspondence between a bundle and an interface represented in the ifTable.
The following objects of the ifTable have specific meaning for an MFR bundle:
ifAdminStatus - the bundle admin status ifOperStatus - the bundle operational status ifSpeed - the current bandwidth of the bundle ifInUcastPkts - the number of frames received on the bundle ifOutUcastPkts - the number of frames transmitted on the bundle ifInErrors - frame (not fragment) errors ifOutErrors - frame (not fragment) errors
The following objects of the ifTable have specific meaning for an MFR bundle link:
ifAdminStatus - the bundle link admin status
ifOperStatus - the bundle link operational status
ifSpeed - the bandwidth of the bundle link interface
ifInUcastPkts - the number of frames received on the bundle link
ifOutUcastPkts - the number of frames transmitted on the bundle
link
ifInErrors - frame and fragment errors
ifOutErrors - frame and fragment errors
Relationship With Interface Stack Table
The bundles and bundle links will appear in the ifStackTable defined in RFC 2863 RFC2863. Each bundle link will appear a lower layer to its owner bundle. The bundle will appear as a higher layer to the bundle links and as a lower layer to a frame relay service or UNI.
Relationship With Frame Relay DTE MIB
The bundle will have a one-to-one correspondence with a DLCMI or UNI that appear in the DTE MIB tables RFC2115.
Relationship With Frame Relay Service MIB
There is a one-to-one relationship between the MFR bundle and the frame relay service logical port defined in RFC1604 RFC1604.
Example
Figure two shows an example of how the various tables are related. This example shows two bundles composed of 2 T1s each. The bundles have a mfrBundleIndex of 10 and 20 respectively.
+-------------------------+
| Frame Relay Service |
+-----+-------------+-----+
| |
+-----+------+------+-----+
| MFR Bundle | MFR Bundle |
| 10 | 20 |
+--+-----+---+---+-----+--+
| | | |
+-+-+ +-+-+ +-+-+ +-+-+
|T1 | |T1 | |T1 | |T1 |
+---+ +---+ +-+-+ +---+
Figure 2: Frame Relay Service Being Carried on 4 T1s
The assignment of the ifTable index values could for example be:
ifIndex | Description | ifType
--------+----------------------------+----------------------
1 | FrameRelayService | frameRelayService(44)
2 | MFR Bundle #10 | frf16MfrBundle(163)
3 | MFR Bundle #20 | frf16MfrBundle(163)
4 | ds1 #1/MFR Bundle Link #1 | ds1(18)
5 | ds1 #2/MFR Bundle Link #2 | ds1(18)
6 | ds1 #3/MFR Bundle Link #3 | ds1(18)
7 | ds1 #4/MFR Bundle Link #4 | ds1(18)
The ifStackTable is then used to show the relationships between the various interfaces.
HigherLayer | LowerLayer
------------+-----------
0 | 1
1 | 2
1 | 3
2 | 4
2 | 5
3 | 6
3 | 7
4 | 0
5 | 0
6 | 0
7 | 0
The mfrBundleIfIndexMappingTable shows the relationship between the ifTable ifIndex and the mfrBundleIndex:
ifIndex | mfrBundleIfIndexMappingIndex
--------+-----------------------------
2 | 10
3 | 20
The mfrBundleTable shows the relationship between the mfrBundleIndex and the ifIndex:
mfrBundleIndex | mfrBundleIfIndex
---------------+-----------------
10 | 2
20 | 3
The mfrBundleLinkTable shows the relationship between the bundles and bundle links:
mfrBundleIndex | mfrBundleLinkIfIndex
---------------+---------------------
10 | 4
10 | 5
20 | 6
20 | 7
Creation Of Bundles and Bundle Links
Creation Of Bundles
A new bundle is created by setting a createAndGo(4) value in the mfrBundleRowStatus RowStatus object. Optionally, an agent could also support setting a value of createAndWait(5) followed by a set to the value active(1).
When a bundle is created, the agent must create a new interface in the ifTable. The ifIndex for this new interface is used for the value of mfrBundleIfIndex.
Creation Of Bundle Links
A new bundle link is created by setting a createAndGo(4) value in the mfrBundleLinkRowStatus RowStatus object.
The bundle link is associated with a specific physical interface and uses the ifIndex of the physical interface. The mfrBundleLinkEntry row objects may be created after or during creation of the physical interface's ifEntry row objects.
The bundle identified in the object mfrBundleIndex must exist at time of bundle link creation.
Notifications
The linkUp and linkDown traps are defined in RFC 2223 RFC2223.
Bundle
The following SNMP traps are defined for MFR bundles.
linkUp
This trap is sent when the ifOperStatus of a bundle transitions from down to up. This occurs when a sufficient number of links (determined by mfrBundleActivationClass and mfrBundleThreshold) are in the operationally up state.
linkDown
This trap is sent when the ifOperStatus of a bundle transitions from up to down. This occurs when a insufficient number of links (determined by mfrBundleActivationClass and mfrBundleThreshold) are in the operationally up state.
Bundle Link
The following SNMP traps are defined for MFR bundle links.
linkUp
This trap is sent when a mfrBundleLinkState object transitions to the value mfrBundleLinkStateUp.
linkDown
This trap is sent when a mfrBundleLinkState object transitions from the value mfrBundleLinkStateUp.
mfrMibTrapBundleLinkMismatch
This trap indicates that a bundle link mismatch has been detected. The following objects are reported:
- mfrBundleNearEndName: configured name of near end bundle - mfrBundleFarEndName: previously reported name of far
end bundle
- mfrBundleLinkNearEndName: configured name of near end bundle - mfrBundleLinkFarEndName: reported name of far end bundle - mfrBundleLinkFarEndBundleName: currently reported name of far
end bundle
Note that the configured items may have been configured automatically. Note also that the mfrBundleLinkMismatch counter is incremented when the trap is sent.
Object Definitions
Managed objects are accessed via a virtual information store, termed the Management Information Base or MIB. Objects in the MIB are defined using the subset of Abstract Syntax Notation One (ASN.1) defined in the SMI. In particular, each object type is named by an OBJECT IDENTIFIER, an administratively assigned name. The object type together with an object instance serves to uniquely identify a specific instantiation of the object. For human convenience, we often use a textual string, termed the descriptor, to refer to the object type.
FR-MFR-MIB DEFINITIONS ::= BEGIN
IMPORTS
MODULE-IDENTITY, OBJECT-TYPE, Integer32, Counter32,
NOTIFICATION-TYPE, transmission
FROM SNMPv2-SMI
TEXTUAL-CONVENTION, TestAndIncr, RowStatus
FROM SNMPv2-TC
MODULE-COMPLIANCE, OBJECT-GROUP, NOTIFICATION-GROUP
FROM SNMPv2-CONF
SnmpAdminString
FROM SNMP-FRAMEWORK-MIB
InterfaceIndex, ifIndex
FROM IF-MIB;
mfrMib MODULE-IDENTITY
LAST-UPDATED "200011300000Z"
ORGANIZATION "IETF Frame Relay Service MIB (frnetmib)
Working Group"
CONTACT-INFO
"WG Charter:
http://www.ietf.org/html.charters/frnetmib-charter.html
WG-email: [email protected]
Subscribe: [email protected]
Email Archive: ftp://ftp.ietf.org/ietf-mail-archive/frnetmib
Chair: Andy Malis
Vivace Networks
Email: [email protected]
WG editor: Prayson Pate
Overture Networks
Email: [email protected]
Co-author: Bob Lynch
Overture Networks
EMail: [email protected]
Co-author: Kenneth Rehbehn
Megisto Systems, Inc.
EMail: [email protected]"
DESCRIPTION
"This is the MIB used to control and monitor the multilink
frame relay (MFR) function described in FRF.16."
-- --------------------------------------------------------- -- --------------------------------------------------------- -- Revision History -- --------------------------------------------------------- -- ---------------------------------------------------------
REVISION "200011300000Z"
DESCRIPTION
"Published as RFC 3020."
::= { transmission 47 }
-- --------------------------------------------------------- -- --------------------------------------------------------- -- Textual Conventions -- --------------------------------------------------------- -- ---------------------------------------------------------
MfrBundleLinkState ::= TEXTUAL-CONVENTION
STATUS current
DESCRIPTION
"The possible states for a bundle link, as defined in
Annex A of FRF.16."
REFERENCE "FRF.16 Annex A"
SYNTAX INTEGER {
mfrBundleLinkStateAddSent (1),
mfrBundleLinkStateAddRx (2),
mfrBundleLinkStateAddAckRx (3),
mfrBundleLinkStateUp (4),
mfrBundleLinkStateIdlePending (5),
mfrBundleLinkStateIdle (6),
mfrBundleLinkStateDown (7),
mfrBundleLinkStateDownIdle (8)
}
-- --------------------------------------------------------- -- --------------------------------------------------------- -- Object Identifiers
-- --------------------------------------------------------- -- ---------------------------------------------------------
mfrMibScalarObjects OBJECT IDENTIFIER ::= { mfrMib 1 } mfrMibBundleObjects OBJECT IDENTIFIER ::= { mfrMib 2 } mfrMibBundleLinkObjects OBJECT IDENTIFIER ::= { mfrMib 3 } mfrMibTraps OBJECT IDENTIFIER ::= { mfrMib 4 } mfrMibConformance OBJECT IDENTIFIER ::= { mfrMib 5 }
mfrMibTrapsPrefix OBJECT IDENTIFIER ::= { mfrMibTraps 0 }
mfrMibGroups OBJECT IDENTIFIER ::= { mfrMibConformance 1 } mfrMibCompliances OBJECT IDENTIFIER ::= { mfrMibConformance 2 }
-- --------------------------------------------------------- -- --------------------------------------------------------- -- Scalars -- --------------------------------------------------------- -- ---------------------------------------------------------
mfrBundleMaxNumBundles OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object is used to inform the manager of the
maximum number of bundles supported by this device."
::= { mfrMibScalarObjects 1 }
mfrBundleNextIndex OBJECT-TYPE
SYNTAX TestAndIncr
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"This object is used to assist the manager in
selecting a value for mfrBundleIndex during row creation
in the mfrBundleTable. It can also be used to avoid race
conditions with multiple managers trying to create
rows in the table (see RFC 2494 RFC2494 for one such
alogrithm)."
REFERENCE "RFC 2494"
::= { mfrMibScalarObjects 2 }
-- --------------------------------------------------------- -- --------------------------------------------------------- -- Bundle Table -- --------------------------------------------------------- -- ---------------------------------------------------------
mfrBundleTable OBJECT-TYPE
SYNTAX SEQUENCE OF MfrBundleEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The bundle configuration and status table. There
is a one-to-one correspondence between a bundle
and an interface represented in the ifTable.
The following objects of the ifTable have specific
meaning for an MFR bundle:
ifAdminStatus - the bundle admin status
ifOperStatus - the bundle operational status
ifSpeed - the current bandwidth of the bundle
ifInUcastPkts - the number of frames received
on the bundle
ifOutUcastPkts - the number of frames transmitted
on the bundle
ifInErrors - frame (not fragment) errors
ifOutErrors - frame (not fragment) errors
"
::= { mfrMibBundleObjects 3 }
mfrBundleEntry OBJECT-TYPE
SYNTAX MfrBundleEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in the bundle table."
INDEX { mfrBundleIndex }
::= { mfrBundleTable 1 }
MfrBundleEntry ::=
SEQUENCE {
mfrBundleIndex
Integer32,
mfrBundleIfIndex
InterfaceIndex,
mfrBundleRowStatus
RowStatus,
mfrBundleNearEndName
SnmpAdminString,
mfrBundleFragmentation
INTEGER,
mfrBundleMaxFragSize
Integer32,
mfrBundleTimerHello
INTEGER,
mfrBundleTimerAck
INTEGER,
mfrBundleCountMaxRetry
INTEGER,
mfrBundleActivationClass
INTEGER,
mfrBundleThreshold
Integer32,
mfrBundleMaxDiffDelay
Integer32,
mfrBundleSeqNumSize
INTEGER,
mfrBundleMaxBundleLinks
Integer32,
mfrBundleLinksConfigured
Integer32,
mfrBundleLinksActive
Integer32,
mfrBundleBandwidth
Integer32,
mfrBundleFarEndName
SnmpAdminString,
mfrBundleResequencingErrors
Counter32
}
mfrBundleIndex OBJECT-TYPE
SYNTAX Integer32 (1..2147483647)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The index into the table. While this corresponds
to an entry in the ifTable, the value of mfrBundleIndex
need not match that of the ifIndex in the ifTable.
A manager can use mfrBundleNextIndex to select a unique
mfrBundleIndex for creating a new row."
::= { mfrBundleEntry 1 }
mfrBundleIfIndex OBJECT-TYPE
SYNTAX InterfaceIndex
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value must match an entry in the interface
table whose ifType must be set to frf16MfrBundle(163).
For example: if the value of mfrBundleIfIndex is 10,
then a corresponding entry should be present in
the ifTable with an index of 10 and an ifType of 163."
::= { mfrBundleEntry 2 }
mfrBundleRowStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The mfrBundleRowStatus object allows create, change,
and delete operations on bundle entries."
REFERENCE "RFC 1903"
::= { mfrBundleEntry 3 }
mfrBundleNearEndName OBJECT-TYPE
SYNTAX SnmpAdminString
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The configured name of the bundle."
REFERENCE "FRF.16 section 3.4.1"
::= { mfrBundleEntry 4 }
mfrBundleFragmentation OBJECT-TYPE
SYNTAX INTEGER {
enable (1),
disable (2)
}
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"Controls whether the bundle performs/accepts
fragmentation and re-assembly. The possible
values are:
enable(1) - Bundle links will fragment frames
disable(2) - Bundle links will not fragment
frames."
DEFVAL { disable }
::= { mfrBundleEntry 5 }
mfrBundleMaxFragSize OBJECT-TYPE
SYNTAX Integer32 (-1..8184)
UNITS "Octets"
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The maximum fragment size supported. Note that this
is only valid if mfrBundleFragmentation is set to enable(1).
Zero is not a valid fragment size.
A bundle that does not support fragmentation must return
this object with a value of -1."
DEFVAL { -1 }
::= { mfrBundleEntry 6 }
mfrBundleTimerHello OBJECT-TYPE
SYNTAX INTEGER (1..180)
UNITS "Seconds"
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The configured MFR Hello Timer value."
REFERENCE "FRF.16 section 4.3.8.1"
DEFVAL { 10 }
::= { mfrBundleEntry 7 }
mfrBundleTimerAck OBJECT-TYPE
SYNTAX INTEGER (1..10)
UNITS "Seconds"
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The configured MFR T_ACK value."
REFERENCE "FRF.16 section 4.3.8.2"
DEFVAL { 4 }
::= { mfrBundleEntry 8 }
mfrBundleCountMaxRetry OBJECT-TYPE
SYNTAX INTEGER (1..5)
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The MFR N_MAX_RETRY value."
REFERENCE "FRF.16 section 4.3.8.3"
DEFVAL { 2 }
::= { mfrBundleEntry 9 }
mfrBundleActivationClass OBJECT-TYPE
SYNTAX INTEGER {
mfrBundleActivationClassA (1),
mfrBundleActivationClassB (2),
mfrBundleActivationClassC (3),
mfrBundleActivationClassD (4)
}
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"Controls the conditions under which the bundle is activated.
The following settings are available:
mfrBundleActivationClassA(1) - at least one must link up
mfrBundleActivationClassB(2) - all links must be up
mfrBundleActivationClassC(3) - a certain number must be
up. Refer to
mfrBundleThreshold for
the required number.
mfrBundleActivationClassD(4) - custom (implementation
specific)."
REFERENCE "FRF.16 section 4.2.2.1"
DEFVAL { mfrBundleActivationClassA }
::= { mfrBundleEntry 10 }
mfrBundleThreshold OBJECT-TYPE
SYNTAX Integer32 (-1..2147483647)
UNITS "Bundle Links"
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"Specifies the number of links that must be in operational
'up' state before the bundle will transition to an
operational up/active state. If the number of
operational 'up' links falls below this value,
then the bundle will transition to an inactive
state.
Note - this is only valid when mfrBundleActivationClass
is set to mfrBundleActivationClassC or, depending upon the
implementation, to mfrBundleActivationClassD. A bundle that
is not set to one of these must return this object with a
value of -1."
REFERENCE "FRF.16 section 4.2.2.1"
DEFVAL { -1 }
::= { mfrBundleEntry 11 }
mfrBundleMaxDiffDelay OBJECT-TYPE
SYNTAX Integer32 (-1..2147483647)
UNITS "Milliseconds"
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The maximum delay difference between the bundle
links.
A value of -1 indicates that this object does not contain
a valid value"
DEFVAL { -1 }
::= { mfrBundleEntry 12 }
mfrBundleSeqNumSize OBJECT-TYPE
SYNTAX INTEGER {
seqNumSize12bit (1),
seqNumSize24bit (2)
}
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"Controls whether the standard FRF.12 12-bit
sequence number is used or the optional 24-bit
sequence number."
REFERENCE "FRFTC/99-194"
DEFVAL { seqNumSize12bit }
::= { mfrBundleEntry 13 }
mfrBundleMaxBundleLinks OBJECT-TYPE
SYNTAX Integer32 (1..2147483647)
UNITS "Bundle Links"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The maximum number of bundle links supported for
this bundle."
::= { mfrBundleEntry 14 }
mfrBundleLinksConfigured OBJECT-TYPE
SYNTAX Integer32 (1..2147483647)
UNITS "Bundle Links"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of links configured for the bundle."
::= { mfrBundleEntry 15 }
mfrBundleLinksActive OBJECT-TYPE
SYNTAX Integer32 (-1..2147483647)
UNITS "Bundle Links"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of links that are active."
::= { mfrBundleEntry 16 }
mfrBundleBandwidth OBJECT-TYPE
SYNTAX Integer32
UNITS "Bits/Sec"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The amount of available bandwidth on the bundle"
::= { mfrBundleEntry 17 }
mfrBundleFarEndName OBJECT-TYPE
SYNTAX SnmpAdminString
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Name of the bundle received from the far end."
REFERENCE "FRF.16 section 3.4.1"
::= { mfrBundleEntry 18 }
mfrBundleResequencingErrors OBJECT-TYPE
SYNTAX Counter32
UNITS "Error Events"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"A count of the number of resequencing errors. Each event
may correspond to multiple lost frames. Example:
Say sequence number 56, 59 and 60 is received for DLCI 100.
It is decided by some means that sequence 57 and 58 is lost.
This counter should then be incremented by ONE, even though
two frames were lost."
::= { mfrBundleEntry 19 }
-- --------------------------------------------------------- -- --------------------------------------------------------- -- ifIndex Mapping to Bundle Index Table -- --------------------------------------------------------- -- ---------------------------------------------------------
mfrBundleIfIndexMappingTable OBJECT-TYPE
SYNTAX SEQUENCE OF MfrBundleIfIndexMappingEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A table mapping the values of ifIndex to the
mfrBundleIndex. This is required in order to find
the mfrBundleIndex given an ifIndex. The mapping of
mfrBundleIndex to ifIndex is provided by the
mfrBundleIfIndex entry in the mfrBundleTable."
::= { mfrMibBundleObjects 4 }
mfrBundleIfIndexMappingEntry OBJECT-TYPE
SYNTAX MfrBundleIfIndexMappingEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Each row describes one ifIndex to mfrBundleIndex mapping."
INDEX { ifIndex }
::= { mfrBundleIfIndexMappingTable 1 }
MfrBundleIfIndexMappingEntry ::=
SEQUENCE {
mfrBundleIfIndexMappingIndex
Integer32
}
mfrBundleIfIndexMappingIndex OBJECT-TYPE
SYNTAX Integer32 (1..2147483647)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The mfrBundleIndex of the given ifIndex."
::= { mfrBundleIfIndexMappingEntry 2 }
-- --------------------------------------------------------- -- --------------------------------------------------------- -- Bundle Link Table -- --------------------------------------------------------- -- ---------------------------------------------------------
mfrBundleLinkTable OBJECT-TYPE
SYNTAX SEQUENCE OF MfrBundleLinkEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The bundle link configuration and status table. There
is a one-to-one correspondence between a bundle link
and a physical interface represented in the ifTable. The
ifIndex of the physical interface is used to index the
bundle link table, and to create rows.
The following objects of the ifTable have specific
meaning for an MFR bundle link:
ifAdminStatus - the bundle link admin status
ifOperStatus - the bundle link operational
status
ifSpeed - the bandwidth of the bundle
link interface
ifInUcastPkts - the number of frames received
on the bundle link
ifOutUcastPkts - the number of frames transmitted
on the bundle link
ifInErrors - frame and fragment errors
ifOutErrors - frame and fragment errors"
::= { mfrMibBundleLinkObjects 1 }
mfrBundleLinkEntry OBJECT-TYPE
SYNTAX MfrBundleLinkEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in the bundle link table."
INDEX { ifIndex }
::= { mfrBundleLinkTable 1 }
MfrBundleLinkEntry ::=
SEQUENCE {
mfrBundleLinkRowStatus
RowStatus,
mfrBundleLinkConfigBundleIndex
Integer32,
mfrBundleLinkNearEndName
SnmpAdminString,
mfrBundleLinkState
MfrBundleLinkState,
mfrBundleLinkFarEndName
SnmpAdminString,
mfrBundleLinkFarEndBundleName
SnmpAdminString,
mfrBundleLinkDelay
Integer32,
mfrBundleLinkFramesControlTx
Counter32,
mfrBundleLinkFramesControlRx
Counter32,
mfrBundleLinkFramesControlInvalid
Counter32,
mfrBundleLinkTimerExpiredCount
Counter32,
mfrBundleLinkLoopbackSuspected
Counter32,
mfrBundleLinkUnexpectedSequence
Counter32,
mfrBundleLinkMismatch
Counter32
}
mfrBundleLinkRowStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The mfrBundleLinkRowStatus object allows create, change,
and delete operations on mfrBundleLink entries.
The create operation must fail if no physical interface
is associated with the bundle link."
::= { mfrBundleLinkEntry 1 }
mfrBundleLinkConfigBundleIndex OBJECT-TYPE
SYNTAX Integer32 (1..2147483647)
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The mfrBundleLinkConfigBundleIndex object allows
the manager to control the bundle to which the bundle
link is assigned. If no value were in this field, then
the bundle would remain in NOT_READY rowStatus and be
unable to go to active. With an appropriate mfrBundleIndex
in this field, then we could put the mfrBundleLink row in
NOT_IN_SERVICE or ACTIVE rowStatus."
::= { mfrBundleLinkEntry 2 }
mfrBundleLinkNearEndName OBJECT-TYPE
SYNTAX SnmpAdminString
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The configured bundle link name that is sent to the far end."
::= { mfrBundleLinkEntry 3 }
mfrBundleLinkState OBJECT-TYPE
SYNTAX MfrBundleLinkState
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Current bundle link state as defined by the MFR protocol
described in Annex A of FRF.16."
REFERENCE "FRF.16 Annex A"
::= { mfrBundleLinkEntry 4 }
mfrBundleLinkFarEndName OBJECT-TYPE
SYNTAX SnmpAdminString
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Name of bundle link received from far end."
REFERENCE "FRF.16 section 3.4.2"
::= { mfrBundleLinkEntry 5 }
mfrBundleLinkFarEndBundleName OBJECT-TYPE
SYNTAX SnmpAdminString
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Name of far end bundle for this link received from far end."
REFERENCE "FRF.16 section 3.4.1"
::= { mfrBundleLinkEntry 6 }
mfrBundleLinkDelay OBJECT-TYPE
SYNTAX Integer32 (-1..2147483647)
UNITS "Milliseconds"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Current round-trip delay for this bundle link. The
value -1 is returned when an implementation does not
support measurement of the bundle link delay."
REFERENCE "FRF.16 section 3.4.4"
::= { mfrBundleLinkEntry 7 }
mfrBundleLinkFramesControlTx OBJECT-TYPE
SYNTAX Counter32
UNITS "Frames"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Number of MFR control frames sent."
REFERENCE "FRF.16 section 3.2"
::= { mfrBundleLinkEntry 8 }
mfrBundleLinkFramesControlRx OBJECT-TYPE
SYNTAX Counter32
UNITS "Frames"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Number of valid MFR control frames received."
REFERENCE "FRF.16 section 3.2"
::= { mfrBundleLinkEntry 9 }
mfrBundleLinkFramesControlInvalid OBJECT-TYPE
SYNTAX Counter32
UNITS "Frames"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of invalid MFR control frames received."
REFERENCE "FRF.16 section 3.2"
::= { mfrBundleLinkEntry 10 }
mfrBundleLinkTimerExpiredCount OBJECT-TYPE
SYNTAX Counter32
UNITS "Timer Expiration Events"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Number of times the T_HELLO or T_ACK timers expired."
REFERENCE "FRF.16 section 4.3.8.1 and 4.3.8.2"
::= { mfrBundleLinkEntry 11 }
mfrBundleLinkLoopbackSuspected OBJECT-TYPE
SYNTAX Counter32
UNITS "Loopback Suspected Events"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of times a loopback has been suspected
(based upon the use of magic numbers)."
REFERENCE "FRF.16 section 4.3.7"
::= { mfrBundleLinkEntry 12 }
mfrBundleLinkUnexpectedSequence OBJECT-TYPE
SYNTAX Counter32
UNITS "Frames"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of data MFR frames discarded because the sequence
number of the frame for a DLCI was less than (delayed frame)
or equal to (duplicate frame) the one expected for that DLCI.
Example:
Say frames with sequence numbers 56, 58, 59 is received for
DLCI 100. While waiting for sequence number 57 another frame
with sequence number 58 arrives. Frame 58 is discarded and
the counter is incremented."
REFERENCE "FRF.16 section 4.2.3.2"
::= { mfrBundleLinkEntry 13 }
mfrBundleLinkMismatch OBJECT-TYPE
SYNTAX Counter32
UNITS "Bundle Name Mismatch Events"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of times that the unit has been notified by the
remote peer that the bundle name is inconsistent with other
bundle links attached to the far-end bundle."
REFERENCE "FRF.16 section 4.3.2.4"
::= { mfrBundleLinkEntry 14 }
-- --------------------------------------------------------- -- --------------------------------------------------------- -- Notifications/Traps -- --------------------------------------------------------- -- ---------------------------------------------------------
mfrMibTrapBundleLinkMismatch NOTIFICATION-TYPE
OBJECTS {
mfrBundleNearEndName,
mfrBundleFarEndName,
mfrBundleLinkNearEndName,
mfrBundleLinkFarEndName,
mfrBundleLinkFarEndBundleName
}
STATUS current
DESCRIPTION
"This trap indicates that a bundle link mismatch has
been detected. The following objects are reported:
mfrBundleNearEndName: configured name of near end bundle
mfrBundleFarEndName: previously reported name of
far end bundle
mfrBundleLinkNearEndName: configured name of near end bundle
mfrBundleLinkFarEndName: reported name of far end bundle
mfrBundleLinkFarEndBundleName: currently reported name of
far end bundle
Note: that the configured items may have been configured
automatically.
Note: The mfrBundleLinkMismatch counter is incremented when
the trap is sent."
REFERENCE "FRF.16 section 4.3.2.4"
::= { mfrMibTrapsPrefix 1 }
-- --------------------------------------------------------- -- --------------------------------------------------------- -- Conformance/Compliance -- --------------------------------------------------------- -- ---------------------------------------------------------
mfrMibCompliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"The compliance statement for equipment that implements
the FRF16 MIB. All of the current groups are mandatory,
but a number of objects may be read-only if the
implementation does not allow configuration."
MODULE -- this module
MANDATORY-GROUPS {
mfrMibBundleGroup,
mfrMibBundleLinkGroup,
mfrMibTrapGroup
}
OBJECT mfrBundleFragmentation
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required, but the value used must be
reported."
OBJECT mfrBundleMaxFragSize
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required, but the value used must be
reported.
A value of -1 indicates that the value is not applicable."
OBJECT mfrBundleThreshold
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required, but the value used must be
reported.
A value of -1 indicates that the value is not applicable."
OBJECT mfrBundleMaxDiffDelay
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required, but the value used must be
reported."
OBJECT mfrBundleSeqNumSize
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required, but the value used must be
reported.
A value of -1 indicates that the value is not applicable."
::= { mfrMibCompliances 1 }
-- --------------------------------------------------------- -- --------------------------------------------------------- -- Units of Conformance -- --------------------------------------------------------- -- ---------------------------------------------------------
mfrMibBundleGroup OBJECT-GROUP
OBJECTS {
mfrBundleMaxNumBundles,
mfrBundleNextIndex,
mfrBundleIfIndex,
mfrBundleRowStatus,
mfrBundleNearEndName,
mfrBundleFragmentation,
mfrBundleMaxFragSize,
mfrBundleTimerHello,
mfrBundleTimerAck,
mfrBundleCountMaxRetry,
mfrBundleActivationClass,
mfrBundleThreshold,
mfrBundleMaxDiffDelay,
mfrBundleMaxBundleLinks,
mfrBundleLinksConfigured,
mfrBundleLinksActive,
mfrBundleBandwidth,
mfrBundleSeqNumSize,
mfrBundleFarEndName,
mfrBundleResequencingErrors,
mfrBundleIfIndexMappingIndex
}
STATUS current
DESCRIPTION
"Group of objects describing bundles."
::= { mfrMibGroups 1 }
mfrMibBundleLinkGroup OBJECT-GROUP
OBJECTS {
mfrBundleLinkRowStatus,
mfrBundleLinkConfigBundleIndex,
mfrBundleLinkNearEndName,
mfrBundleLinkState,
mfrBundleLinkFarEndName,
mfrBundleLinkFarEndBundleName,
mfrBundleLinkDelay,
mfrBundleLinkFramesControlTx,
mfrBundleLinkFramesControlRx,
mfrBundleLinkFramesControlInvalid,
mfrBundleLinkTimerExpiredCount,
mfrBundleLinkLoopbackSuspected,
mfrBundleLinkUnexpectedSequence,
mfrBundleLinkMismatch
}
STATUS current
DESCRIPTION
"Group of objects describing bundle links."
::= { mfrMibGroups 2 }
mfrMibTrapGroup NOTIFICATION-GROUP
NOTIFICATIONS {
mfrMibTrapBundleLinkMismatch
}
STATUS current
DESCRIPTION
"Group of objects describing notifications (traps)."
::= { mfrMibGroups 3 }
END
Acknowledgments
This document was produced by the Frame Relay Service MIB (frnetmib) Working Group in conjunction with the Frame Relay Forum.
References
RFC2571 Harrington, D., Presuhn, R. and B. Wijnen, "An Architecture
for Describing SNMP Management Frameworks", RFC 2571, April 1999.
RFC1155 Rose, M. and K. McCloghrie, "Structure and Identification
of Management Information for TCP/IP-based Internets", STD
16, RFC 1155, May 1990.
RFC1212 Rose, M. and K. McCloghrie, "Concise MIB Definitions", STD
16, RFC 1212, March 1991.
RFC1215 Rose, M., "A Convention for Defining Traps for use with the
SNMP", RFC 1215, March 1991.
RFC2578 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.
RFC2579 McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J.,
Rose, M. and S. Waldbusser, "Textual Conventions for
SMIv2", STD 58, RFC 2579, April 1999.
RFC2580 McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J.,
Rose, M. and S. Waldbusser, "Conformance Statements for
SMIv2", STD 58, RFC 2580, April 1999.
RFC1157 Case, J., Fedor, M., Schoffstall, M. and J. Davin, "Simple
Network Management Protocol", STD 15, RFC 1157, May 1990.
RFC1901 Case, J., McCloghrie, K., Rose, M. and S. Waldbusser,
"Introduction to Community-based SNMPv2", RFC 1901, January 1996.
RFC1906 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.
RFC2572 Case, J., Harrington D., Presuhn R. and B. Wijnen, "Message
Processing and Dispatching for the Simple Network
Management Protocol (SNMP)", RFC 2572, April 1999.
RFC2574 Blumenthal, U. and B. Wijnen, "User-based Security Model
(USM) for version 3 of the Simple Network Management
Protocol (SNMPv3)", RFC 2574, April 1999.
RFC1905 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.
RFC2573 Levi, D., Meyer, P. and B. Stewart, "SNMPv3 Applications",
RFC 2573, April 1999.
RFC2575 Wijnen, B., Presuhn, R. and K. McCloghrie, "View-based
Access Control Model (VACM) for the Simple Network
Management Protocol (SNMP)", RFC 2575, April 1999.
RFC2570 Case, J., Mundy, R., Partain, D. and B. Stewart,
"Introduction to Version 3 of the Internet-standard Network
Management Framework", RFC 2570, April 1999.
[Q.922] ITU-T, Recommendation Q.922: "ISDN Data Link Layer
Specification For Frame Mode Bearer Services"
[Q.933] ITU-T, Recommendation Q.933: "Signalling Specification For
Frame Mode Basic Call Control"
[FRF.4] R. Cherukuri (ed), FRF.4: "Frame Relay User-to-Network SVC
Implementation Agreement" January 5, 1994.
[FRF.16] M. Sheehan (ed), FRF.16: "UNI/NNI Multilink Frame Relay
Interworking Implementation Agreement" August 20, 1999.
RFC1604 Rehbehn, K. and D. Fowler, "Definitions of Managed Objects
for Frame Relay Service", RFC 2954, October 2000.
RFC2494 Fowler, D., "Definitions of Managed Objects for the DS0 and
DS0 Bundle Interface Type", RFC 2494, November 1997.
RFC2863 McCloghrie, D. and F. Kastenholz, "The Interfaces Group MIB
using SMIv2", RFC 2233, June 2000.
[ATMLANE] T. Newton, ed., "LAN Emulation Client Management
Specification Version 2.0" AF-LANE-0093.000, ATM Forum,
October, 1998
[ATMIMA] R. Vallee, ed., "Inverse Multiplexing for ATM Specification
Version 1.1" (Appendix A) AF-PHY-0086.001, ATM Forum,
March, 1999
RFC2115 Brown, C. and F. Baker, "Management Information Base for
Frame Relay DTEs Using SMIv2", RFC 2115, September 1997.
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.
No managed objects in this MIB contain sensitive information.
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 who 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 RFC2574 and the View- based Access Control Model RFC 2575 RFC2575 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.
Authors' Addresses
Prayson Pate Overture Networks P. O. Box 14864 RTP, NC, USA 27709
Phone: +1 919 558 2200 EMail: [email protected]
Bob Lynch Overture Networks P. O. Box 14864 RTP, NC, USA 27709
Phone: +1 919 558-2200 EMail: [email protected]
Kenneth Rehbehn Megisto Systems, Inc. 20251 Century Boulevard Germantown, MD, USA 20874
Phone: +1 301 529-4427 EMail: [email protected]
Full Copyright Statement
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Acknowledgement
Funding for the RFC Editor function is currently provided by the Internet Society.
