RFC2494
Network Working Group D. Fowler, Editor Request for Comments: 2494 Newbridge Networks Category: Standards Track January 1999
Definitions of Managed Objects
for the DS0 and DS0 Bundle Interface Type
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 (1999). All Rights Reserved.
Abstract
This memo defines a portion of the Management Information Base (MIB) for use with network management protocols in the Internet community. In particular, it describes objects used for managing DS0 and DS0 Bundle interfaces. This document is a companion document with Definitions of Managed Objects for the DS1/E1/DS2/E2 (RFC 2495 [17]), DS3/E3 (RFC 2496 [18]), and the work in progress, SONET/SDH Interface Types.
This memo specifies a MIB module in a manner that is both compliant to the SNMPv2 SMI, and semantically identical to the peer SNMPv1 definitions.
Contents
The SNMP Management Framework
The SNMP Management Framework presently consists of five major components:
o An overall architecture, described in RFC 2271 [1].
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 [2], STD 16, RFC 1212 [3] and RFC 1215 [4]. The
second version, called SMIv2, is described in RFC 1902 [5], RFC
1903 [6] and RFC 1904 [7].
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 [8]. A second version of the SNMP
message protocol, which is not an Internet standards track
protocol, is called SNMPv2c and described in RFC 1901 [9] and
RFC 1906 [10]. The third version of the message protocol is
called SNMPv3 and described in RFC 1906 [10], RFC 2272 [11] and
RFC 2274 [12].
o Protocol operations for accessing management information. The
first set of protocol operations and associated PDU formats is
described in STD 15, RFC 1157 [8]. A second set of protocol
operations and associated PDU formats is described in RFC 1905
[13].
o A set of fundamental applications described in RFC 2273 [14] and the view-based access control mechanism described in RFC 2275 [15]. 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
These objects are used when the particular media being used to realize an interface is a DS0 interface. At present, this applies to these values of the ifType variable in the Internet-standard MIB:
ds0 (81)
ds0Bundle (82)
BONDing Terminology
Please reference The BONDing Spec [20] for definitions of terms used to describe bonding modes.
Use of ifTable for DS0 Layer
The following items are defined in RFC 2233 [16].
Only the ifGeneralInformationGroup and ifCounterDiscontinuityGroup need to be supported.
ifTable Object Use for DS0 Layer
==========================================================
ifIndex Interface index.
ifDescr See interfaces MIB [16].
ifType ds0(81) or ds0Bundle(82).
ifSpeed 64000 for ds0 (regardless of the
setting of robbed bit signalling)
or N*64000 for ds0Bundle.
ifPhysAddress The value of the Circuit
Identifier. If no Circuit
Identifier has been assigned
this object should have an octet
string with zero length.
ifAdminStatus See interfaces MIB [16].
ifOperStatus See interfaces MIB [16].
ifLastChange See interfaces MIB [16].
ifName See interfaces MIB [16].
ifLinkUpDownTrapEnable Set to disabled(2).
Supports read-only access.
ifHighSpeed Set to rounded ifSpeed/1000000.
ifConnectorPresent Set to false(2).
Using ifStackTable
This section describes by example how to use ifStackTable to represent the relationship of ds0 and ds0Bundles with ds1 interfaces. Implementors of the stack table for ds0 and ds0Bundle interfaces should look at the appropriate RFC for the service being stacked on ds0s and ds0Bundles. Examples given below are for illustration purposes only.
Example: A Frame Relay Service is being carried on 4 ds0s of a ds1.
+---------------------+
| Frame Relay Service |
+---------------------+
|
+---------------------+
| ds0Bundle |
+---------------------+
| | | |
+---+ +---+ +---+ +---+
|ds0| |ds0| |ds0| |ds0|
+---+ +---+ +---+ +---+
| | | |
+---------------------+
| ds1 |
+---------------------+
The assignment of the index values could for example be:
ifIndex Description
1 FrameRelayService (type 44)
2 ds0Bundle (type 82)
3 ds0 #1 (type 81)
4 ds0 #2 (type 81)
5 ds0 #3 (type 81)
6 ds0 #4 (type 81)
7 ds1 (type 18)
The ifStackTable is then used to show the relationships between the various interfaces.
ifStackTable Entries
HigherLayer LowerLayer
0 1
1 2
2 3
2 4
2 5
2 6
3 7
4 7
5 7
6 7
7 0
In the case where the frameRelayService is using a single ds0, then the ds0Bundle is not required.
+---------------------+
| Frame Relay Service |
+---------------------+
|
+---+
|ds0|
+---+
|
+---------------------+
| ds1 |
+---------------------+
The assignment of the index values could for example be:
ifIndex Description
1 FrameRelayService (type 44)
2 ds0 (type 81)
3 ds1 (type 18)
The ifStackTable is then used to show the relationships between the various interfaces.
ifStackTable Entries
HigherLayer LowerLayer
0 1
1 2
2 3
3 0
Usage of Channelization for DS3, DS1, DS0
An example is given here to explain the channelization objects in the DS3, DS1, and DS0 MIBs to help the implementor use the objects correctly. Treatment of E3 and E1 would be similar, with the number of DS0s being different depending on the framing of the E1. Timeslot 16 is not created for framing types that do not pass data over it.
Assume that a DS3 (with ifIndex 1) is channelized into DS1s (without DS2s). The object dsx3Channelization is set to enabledDs1. There will be 28 DS1s in the ifTable. Assume the entries in the ifTable for the DS1s are created in channel order and the ifIndex values are 2 through 29. In the DS1 MIB, there will be an entry in the dsx1ChanMappingTable for each ds1. The entries will be as follows:
dsx1ChanMappingTable Entries
ifIndex dsx1Ds1ChannelNumber dsx1ChanMappedIfIndex
1 1 2
1 2 3
1 28 29
In addition, the DS1s are channelized into DS0s. The object dsx1Channelization is set to enabledDs0 for each DS1. When this object is set to this value, 24 DS0s are created by the agent. There will be 24 DS0s in the ifTable for each DS1. If the dsx1Channelization is set to disabled, the 24 DS0s are destroyed.
Assume the entries in the ifTable are created in channel order and the ifIndex values for the DS0s in the first DS1 are 30 through 53. In the DS0 MIB, there will be an entry in the dsx0ChanMappingTable for each DS0. The entries will be as follows:
dsx0ChanMappingTable Entries
ifIndex dsx0Ds0ChannelNumber dsx0ChanMappedIfIndex
2 1 30
2 2 31
2 24 53
Usage of ifIndex Mapping for DS0Bundle
An example is given here to explain the ifIndex mapping objects in the DS0Bundle MIB to help the implementor use the objects correctly.
Assume that a DS1 (with ifIndex 1) is channelized into DS0s. There will be 24 DS0s in the ifTable. Assume the entries in the ifTable for the DS0s are created in channel order and the ifIndex values are 2 through 25. Now, assume that there are two bundles on the DS1. The first one uses channels 1 and 2. The second uses channels 3 and 4. There will be two ifTable entries for these bundles, with values of 26 and 27 for ifIndex. There will be an entry in the dsx0BundleTable for each bundle. The entries will be as follows:
dsx0BundleTable Entries
dsx0BundleIndex dsx0BundleIfIndex
1 26
2 27
There will be an entry in the dsx0ConfigTable for each DS0. The entries will be as follows:
dsx0ConfigTable Entries
ifIndex dsx0Ds0ChannelNumber dsx0Ds0BundleMappedIfIndex
2 1 26
3 2 26
4 3 27
5 4 27
6 5 0
7 6 0
25 24 0
Overview of the MIB
This document contains 2 MIB modules, the DS0 MIB and the DS0Bundle MIB.
DS0 MIB
The DS0 MIB is used to represent individual DS0s in a DS1 or E1. Variables in this MIB would be created for each DS0 in the ifTable. This MIB contains the following group:
The DS0 Config Group - This group contains configuration information about a particular DS0.
DS0Bundle MIB
The DS0Bundle MIB is used to represent collections of DS0s that are used together to carry data within a DS1/E1 at speeds greater than that of a single DS0. DS0Bundles are created on top of DS0s and are represented that way in the ifStackTable. This MIB contains the following groups:
The DS0 Bundle Group - This group contains objects used for creating new ds0Bundles. This group is mandatory.
The DS0 Bonding Group - This group contains information about bonding for a ds0Bundle, if bonding is enabled. This group is optional.
Object Definitions for DS0
DS0-MIB DEFINITIONS ::= BEGIN
IMPORTS
MODULE-IDENTITY, OBJECT-TYPE,
transmission FROM SNMPv2-SMI
MODULE-COMPLIANCE, OBJECT-GROUP FROM SNMPv2-CONF
DisplayString, TruthValue FROM SNMPv2-TC
ifIndex, InterfaceIndex,
InterfaceIndexOrZero FROM IF-MIB;
-- This is the MIB module for the DS0 Interface objects.
ds0 MODULE-IDENTITY
LAST-UPDATED "9807161630Z"
ORGANIZATION "IETF Trunk MIB Working Group"
CONTACT-INFO
" David Fowler
Postal: Newbridge Networks Corporation
600 March Road
Kanata, Ontario, Canada K2K 2E6
Tel: +1 613 591 3600
Fax: +1 613 599 3619
E-mail: [email protected]" DESCRIPTION "The MIB module to describe DS0 interfaces objects." REVISION "9805242010Z" DESCRIPTION "Initial version of the DS0-MIB."
::= { transmission 81 }
-- The DS0 Config Group
-- Implementation of this group is mandatory for all -- systems that use a DS0 Interface.
-- The DS0 Config Group consists of two tables: -- DS0 Configuration Table -- DS0 Channel Mapping Table
-- The DS0 Configuration Table
dsx0ConfigTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dsx0ConfigEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The DS0 Configuration table."
::= { ds0 1 }
dsx0ConfigEntry OBJECT-TYPE
SYNTAX Dsx0ConfigEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in the DS0 Configuration table. There
is an entry in this table for each DS0 interface."
INDEX { ifIndex }
::= { dsx0ConfigTable 1 }
Dsx0ConfigEntry ::=
SEQUENCE {
dsx0Ds0ChannelNumber INTEGER,
dsx0RobbedBitSignalling TruthValue,
dsx0CircuitIdentifier DisplayString,
dsx0IdleCode INTEGER,
dsx0SeizedCode INTEGER,
dsx0ReceivedCode INTEGER,
dsx0TransmitCodesEnable TruthValue,
dsx0Ds0BundleMappedIfIndex InterfaceIndexOrZero
}
dsx0Ds0ChannelNumber OBJECT-TYPE
SYNTAX INTEGER(0..31)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object indicates the channel number of the
ds0 on its DS1/E1."
::= { dsx0ConfigEntry 1 }
dsx0RobbedBitSignalling OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"This object indicates if Robbed Bit Signalling is
turned on or off for a given ds0. This only
applies to DS0s on a DS1 link. For E1 links the
value is always off (false)."
::= { dsx0ConfigEntry 2 }
dsx0CircuitIdentifier OBJECT-TYPE
SYNTAX DisplayString (SIZE (0..255))
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"This object contains the transmission vendor's
circuit identifier, for the purpose of
facilitating troubleshooting."
::= { dsx0ConfigEntry 3 }
dsx0IdleCode OBJECT-TYPE
SYNTAX INTEGER(0..15)
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"This object contains the code transmitted in the
ABCD bits when the ds0 is not connected and
dsx0TransmitCodesEnable is enabled. The object is
a bitmap and the various bit positions are:
1 D bit
2 C bit
4 B bit
8 A bit"
::= { dsx0ConfigEntry 4 }
dsx0SeizedCode OBJECT-TYPE
SYNTAX INTEGER(0..15)
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"This object contains the code transmitted in the
ABCD bits when the ds0 is connected and
dsx0TransmitCodesEnable is enabled. The object is
a bitmap and the various bit positions are:
1 D bit
2 C bit
4 B bit
8 A bit"
::= { dsx0ConfigEntry 5 }
dsx0ReceivedCode OBJECT-TYPE
SYNTAX INTEGER(0..15)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object contains the code being received in
the ABCD bits. The object is a bitmap and the
various bit positions are:
1 D bit
2 C bit
4 B bit
8 A bit"
::= { dsx0ConfigEntry 6 }
dsx0TransmitCodesEnable OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"This object determines if the idle and seized
codes are transmitted. If the value of this object
is true then the codes are transmitted."
::= { dsx0ConfigEntry 7 }
dsx0Ds0BundleMappedIfIndex OBJECT-TYPE
SYNTAX InterfaceIndexOrZero
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object indicates the ifIndex value assigned
by the agent for the ds0Bundle(82) ifEntry to
which the given ds0(81) ifEntry may belong.
If the given ds0(81) ifEntry does not belong to
any ds0Bundle(82) ifEntry, then this object has a
value of zero.
While this object provides information that can
also be found in the ifStackTable, it provides
this same information with a single table lookup,
rather than by walking the ifStackTable to find
the possibly non-existent ds0Bundle(82) ifEntry
that may be stacked above the given ds0(81)
ifTable entry."
::= { dsx0ConfigEntry 8 }
-- The DS0 Channel Mapping Table
dsx0ChanMappingTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dsx0ChanMappingEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The DS0 Channel Mapping table. This table maps a
DS0 channel number on a particular DS1/E1 into an
ifIndex."
::= { ds0 3 }
dsx0ChanMappingEntry OBJECT-TYPE
SYNTAX Dsx0ChanMappingEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in the DS0 Channel Mapping table. There
is an entry in this table corresponding to each
ds0 ifEntry within any interface that is
channelized to the individual ds0 ifEntry level.
This table is intended to facilitate mapping from
channelized interface / channel number to DS0
ifEntry. (e.g. mapping (DS1 ifIndex, DS0 Channel
Number) -> ifIndex)
While this table provides information that can
also be found in the ifStackTable and
dsx0ConfigTable, it provides this same information
with a single table lookup, rather than by walking
the ifStackTable to find the various constituent
ds0 ifTable entries, and testing various
dsx0ConfigTable entries to check for the entry
with the applicable DS0 channel number."
INDEX { ifIndex, dsx0Ds0ChannelNumber }
::= { dsx0ChanMappingTable 1 }
Dsx0ChanMappingEntry ::=
SEQUENCE {
dsx0ChanMappedIfIndex InterfaceIndex
}
dsx0ChanMappedIfIndex OBJECT-TYPE
SYNTAX InterfaceIndex
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object indicates the ifIndex value assigned
by the agent for the individual ds0 ifEntry that
corresponds to the given DS0 channel number
(specified by the INDEX element
dsx0Ds0ChannelNumber) of the given channelized
interface (specified by INDEX element ifIndex)."
::= { dsx0ChanMappingEntry 1 }
-- conformance information
ds0Conformance OBJECT IDENTIFIER ::= { ds0 2 }
ds0Groups OBJECT IDENTIFIER ::= { ds0Conformance 1 } ds0Compliances OBJECT IDENTIFIER ::= { ds0Conformance 2 }
-- compliance statements
ds0Compliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"The compliance statement for DS0 interfaces."
MODULE -- this module
MANDATORY-GROUPS { ds0ConfigGroup }
OBJECT dsx0RobbedBitSignalling
MIN-ACCESS read-only
DESCRIPTION
"The ability to set RBS is not required."
OBJECT dsx0CircuitIdentifier
MIN-ACCESS read-only
DESCRIPTION
"The ability to set the circuit identifier is not
required."
OBJECT dsx0IdleCode
MIN-ACCESS read-only
DESCRIPTION
"The ability to set the idle code is not
required."
OBJECT dsx0SeizedCode
MIN-ACCESS read-only
DESCRIPTION
"The ability to set the seized code is not
required."
OBJECT dsx0TransmitCodesEnable
MIN-ACCESS read-only
DESCRIPTION
"The ability to enable and disable the
transmitting of idle and seized codes is not
required."
::= { ds0Compliances 1 }
-- units of conformance
ds0ConfigGroup OBJECT-GROUP
OBJECTS { dsx0Ds0ChannelNumber,
dsx0RobbedBitSignalling,
dsx0CircuitIdentifier,
dsx0IdleCode,
dsx0SeizedCode,
dsx0ReceivedCode,
dsx0TransmitCodesEnable,
dsx0Ds0BundleMappedIfIndex,
dsx0ChanMappedIfIndex }
STATUS current
DESCRIPTION
"A collection of objects providing configuration
information applicable to all DS0 interfaces."
::= { ds0Groups 1 }
END
Object Definitions for DS0 Bundle
DS0BUNDLE-MIB DEFINITIONS ::= BEGIN
IMPORTS
MODULE-IDENTITY, OBJECT-TYPE,
transmission FROM SNMPv2-SMI
MODULE-COMPLIANCE, OBJECT-GROUP FROM SNMPv2-CONF
DisplayString, RowStatus,
TestAndIncr FROM SNMPv2-TC
ifIndex, InterfaceIndex FROM IF-MIB;
-- This is the MIB module for the DS0Bundle Interface -- objects.
ds0Bundle MODULE-IDENTITY
LAST-UPDATED "9807161630Z"
ORGANIZATION "IETF Trunk MIB Working Group"
CONTACT-INFO
" David Fowler
Postal: Newbridge Networks Corporation
600 March Road
Kanata, Ontario, Canada K2K 2E6
Tel: +1 613 591 3600
Fax: +1 613 599 3619
E-mail: [email protected]" DESCRIPTION "The MIB module to describe DS0 Bundle interfaces objects." REVISION "9805242010Z" DESCRIPTION "Initial version of the DS0BUNDLE-MIB."
::= { transmission 82 }
-- -- The DS0 Bundle Config Group -- -- Implementation of this group is mandatory for all -- systems that use a DS0Bundle Interface. -- -- The DS0 Bundle Config Group consists of one table: -- DS0 Bundle Table
-- The DS0 Bundle Table
dsx0BundleNextIndex OBJECT-TYPE
SYNTAX TestAndIncr
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"This object is used to assist the manager in
selecting a value for dsx0BundleIndex. Because
this object is of syntax TestAndIncr (see the
SNMPv2-TC document, RFC 1903) it can also be used
to avoid race conditions with multiple managers
trying to create rows in the table.
If the result of the SET for dsx0BundleNextIndex
is not success, this means the value has been
changed from index (i.e. another manager used the
value), so a new value is required.
The algorithm is:
done = false
while done == false
index = GET (dsx0BundleNextIndex.0)
SET (dsx0BundleNextIndex.0=index)
if (set failed)
done = false
else
SET(dsx0BundleRowStatus.index=createAndGo)
if (set failed)
done = false
else
done = true
other error handling"
::= { ds0Bundle 2 }
dsx0BundleTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dsx0BundleEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"There is an row in this table for each ds0Bundle
in the system. This table can be used to
(indirectly) create rows in the ifTable with
ifType = 'ds0Bundle(82)'."
::= { ds0Bundle 3 }
dsx0BundleEntry OBJECT-TYPE
SYNTAX Dsx0BundleEntry MAX-ACCESS not-accessible STATUS current
DESCRIPTION
"There is a row in entry in this table for each
ds0Bundle interface."
INDEX { dsx0BundleIndex }
::= { dsx0BundleTable 1 }
Dsx0BundleEntry ::=
SEQUENCE {
dsx0BundleIndex INTEGER,
dsx0BundleIfIndex InterfaceIndex,
dsx0BundleCircuitIdentifier DisplayString,
dsx0BundleRowStatus RowStatus
}
dsx0BundleIndex OBJECT-TYPE
SYNTAX INTEGER (0..2147483647)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A unique identifier for a ds0Bundle. This is not
the same value as ifIndex. 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."
::= { dsx0BundleEntry 1 }
dsx0BundleIfIndex OBJECT-TYPE
SYNTAX InterfaceIndex
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The ifIndex value the agent selected for the
(new) ds0Bundle interface."
::= { dsx0BundleEntry 2 }
dsx0BundleCircuitIdentifier OBJECT-TYPE
SYNTAX DisplayString (SIZE (0..255))
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This variable contains the transmission vendor's
circuit identifier, for the purpose of
facilitating troubleshooting."
::= { dsx0BundleEntry 3 }
dsx0BundleRowStatus OBJECT-TYPE
SYNTAX RowStatus MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This object is used to create and delete rows in
this table."
::= { dsx0BundleEntry 4 }
-- The DS0 Bonding Group
-- Implementation of this group is optional for all -- systems that use a DS0Bundle Interface.
-- The DS0 Bonding Group consists of one table: -- DS0 Bonding Table
-- The DS0 Bonding Table
dsx0BondingTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dsx0BondingEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The DS0 Bonding table."
::= { ds0Bundle 1 }
dsx0BondingEntry OBJECT-TYPE
SYNTAX Dsx0BondingEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in the DS0 Bonding table. There is a
row in this table for each DS0Bundle interface."
INDEX { ifIndex }
::= { dsx0BondingTable 1 }
Dsx0BondingEntry ::=
SEQUENCE {
dsx0BondMode INTEGER,
dsx0BondStatus INTEGER,
dsx0BondRowStatus RowStatus
}
dsx0BondMode OBJECT-TYPE
SYNTAX INTEGER {
none(1),
other(2),
mode0(3),
mode1(4),
mode2(5),
mode3(6)
}
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This object indicates which BONDing mode is used,
if any, for a ds0Bundle. Mode0 provides parameter
and number exchange with no synchronization. Mode
1 provides parameter and number exchange. Mode 1
also provides synchronization during
initialization but does not include inband
monitoring. Mode 2 provides all of the above plus
inband monitoring. Mode 2 also steals 1/64th of
the bandwidth of each channel (thus not supporting
n x 56/64 kbit/s data channels for most values of
n). Mode 3 provides all of the above, but also
provides n x 56/64 kbit/s data channels. Most
common implementations of Mode 3 add an extra
channel to support the inband monitoring overhead.
ModeNone should be used when the interface is not
performing bandwidth-on-demand."
::= { dsx0BondingEntry 1 }
dsx0BondStatus OBJECT-TYPE
SYNTAX INTEGER {
idle(1),
callSetup(2),
dataTransfer(3)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object indicates the current status of the
bonding call using this ds0Bundle. idle(1) should
be used when the bonding mode is set to none(1)."
::= { dsx0BondingEntry 2 }
dsx0BondRowStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This object is used to create new rows in this
table, modify existing rows, and to delete
existing rows."
::= { dsx0BondingEntry 3 }
-- conformance information
ds0BundleConformance OBJECT IDENTIFIER ::= { ds0Bundle 4 }
ds0BundleGroups OBJECT IDENTIFIER
::= { ds0BundleConformance 1 }
ds0BundleCompliances OBJECT IDENTIFIER
::= { ds0BundleConformance 2 }
-- compliance statements
ds0BundleCompliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"The compliance statement for DS0Bundle
interfaces."
MODULE -- this module
MANDATORY-GROUPS {ds0BundleConfigGroup }
GROUP ds0BondingGroup
DESCRIPTION
"Implementation of this group is optional for all
systems that attach to a DS0Bundle Interface."
OBJECT dsx0BundleRowStatus
SYNTAX INTEGER {
active(1),
createAndGo(4),
destroy(6)
}
MIN-ACCESS read-only
DESCRIPTION
"The agent is not required to support a SET
operation to this object, and only three of the
six enumerated values for the RowStatus textual
convention need be supported. Only supporting
createAndGo for a creation process prevents the
manager from creating an inactive row in the
ds0BundleTable. Inactive rows in the
ds0BundleTable do not make sense."
OBJECT dsx0BundleCircuitIdentifier
MIN-ACCESS read-only
DESCRIPTION
"The agent is not required to support a SET
operation to this object."
::= { ds0BundleCompliances 1 }
-- units of conformance
ds0BondingGroup OBJECT-GROUP
OBJECTS { dsx0BondMode,
dsx0BondStatus,
dsx0BondRowStatus }
STATUS current
DESCRIPTION
"A collection of objects providing
configuration information applicable
to all DS0 interfaces."
::= { ds0BundleGroups 1 }
ds0BundleConfigGroup OBJECT-GROUP
OBJECTS { dsx0BundleNextIndex,
dsx0BundleIfIndex,
dsx0BundleCircuitIdentifier,
dsx0BundleRowStatus }
STATUS current
DESCRIPTION
"A collection of objects providing the ability to
create a new ds0Bundle in the ifTable as well as
configuration information about the ds0Bundle."
::= { ds0BundleGroups 2 }
END
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Acknowledgments
This document was produced by the Trunk MIB Working Group.
References
[1] Harrington, D., Presuhn, R., and B. Wijnen, "An Architecture for
Describing SNMP Management Frameworks", RFC 2271, January 1998.
[2] Rose, M., and K. McCloghrie, "Structure and Identification of
Management Information for TCP/IP-based Internets", STD 16, RFC 1155, May 1990.
[3] Rose, M., and K. McCloghrie, "Concise MIB Definitions", STD 16,
RFC 1212, March 1991.
[4] Rose, M., "A Convention for Defining Traps for use with the
SNMP", RFC 1215, March 1991.
[5] Case, J., McCloghrie, K., Rose, M., and S. Waldbusser,
"Structure of Management Information for Version 2 of the Simple
Network Management Protocol (SNMPv2)", RFC 1902, January 1996.
[6] Case, J., McCloghrie, K., Rose, M., and S. Waldbusser, "Textual
Conventions for Version 2 of the Simple Network Management
Protocol (SNMPv2)", RFC 1903, January 1996.
[7] Case, J., McCloghrie, K., Rose, M., and S. Waldbusser,
"Conformance Statements for Version 2 of the Simple Network
Management Protocol (SNMPv2)", RFC 1904, January 1996.
[8] Case, J., Fedor, M., Schoffstall, M., and J. Davin, "Simple
Network Management Protocol", STD 15, RFC 1157, May 1990.
[9] Case, J., McCloghrie, K., Rose, M., and S. Waldbusser,
"Introduction to Community-based SNMPv2", RFC 1901, January 1996.
[10] 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.
[11] Case, J., Harrington D., Presuhn R., and B. Wijnen, "Message
Processing and Dispatching for the Simple Network Management
Protocol (SNMP)", RFC 2272, January 1998.
[12] Blumenthal, U., and B. Wijnen, "User-based Security Model (USM)
for version 3 of the Simple Network Management Protocol
(SNMPv3)", RFC 2274, January 1998.
[13] 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.
[14] Levi, D., Meyer, P., and B. Stewart, "SNMPv3 Applications", RFC
2273, January 1998.
[15] Wijnen, B., Presuhn, R., and K. McCloghrie, "View-based Access
Control Model (VACM) for the Simple Network Management Protocol
(SNMP)", RFC 2275, January 1998.
[16] McCloghrie, K. and F. Kastenholz, "The Interfaces Group MIB
using SMIv2", RFC 2233, November 1997.
[17] Fowler D., "Definitions of Managed Objects for the DS1, E1, DS2,
and E2 Interface Types", RFC 2495, January 1999.
[18] Fowler, D., "Definitions of Managed Objects for the DS3/E3
Interface Types", RFC 2496, January 1999.
[19] Brown, T., and K. Tesink, "Definitions of Managed Objects for
the SONET/SDH Interface Type", Work in Progress.
[20] Sharp, H. (Editor), "Interoperability Requirements for Nx56/64
kbit/s Calls", BONDING Spec Version 1.0, BONDING Consortium,
Sept 1992.
Security Considerations
SNMPv1 by itself is such an insecure 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 (read) the objects in this MIB.
It is recommended that the implementors consider the security features as provided by the SNMPv3 framework. Specifically, the use of the User-based Security Model RFC 2274 [12] and the View-based Access Control Model RFC 2275 [15] 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 those objects only to those principals (users) that have legitimate rights to access them.
Setting the following objects to an inappropriate value can cause loss of traffic. In the case of dsx0RobbedBitSignalling, for example, the nature of the traffic flowing on the DS0 can be affected.
dsx0RobbedBitSignalling dsx0IdleCode dsx0SeizedCode dsx0TransmitCodesEnable dsx0BundleRowStatus dsx0BondMode dsx0BondRowStatus
Setting the following objects is mischievous, but not harmful to traffic.
dsx0CircuitIdentifier dsx0BundleNextIndex
10. Author's Address
David Fowler Newbridge Networks 600 March Road Kanata, Ontario, Canada K2K 2E6
Phone: (613) 599-3600, ext 6559 EMail: [email protected]
11. Full Copyright Statement
Copyright (C) The Internet Society (1999). All Rights Reserved.
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