"The ability to set the line coding is not
required."
OBJECT dsx1SendCode
MIN-ACCESS read-only
DESCRIPTION
"The ability to set the send code is not
required."
OBJECT dsx1LoopbackConfig
MIN-ACCESS read-only
DESCRIPTION
"The ability to set loopbacks is not required."
OBJECT dsx1SignalMode
MIN-ACCESS read-only
DESCRIPTION
"The ability to set the signal mode is not
required."
OBJECT dsx1TransmitClockSource
MIN-ACCESS read-only
DESCRIPTION
"The ability to set the transmit clock source is
not required."
OBJECT dsx1Fdl
MIN-ACCESS read-only
DESCRIPTION
"The ability to set the FDL is not required."
OBJECT dsx1LineLength
MIN-ACCESS read-only
DESCRIPTION
"The ability to set the line length is not
required."
OBJECT dsx1Channelization
MIN-ACCESS read-only
DESCRIPTION
"The ability to set the channelization is not
required."
OBJECT dsx1LineMode
MIN-ACCESS read-only
DESCRIPTION
"The ability to set the Line Mode is not
required."
OBJECT dsx1LineBuildOut
MIN-ACCESS read-only
DESCRIPTION
"The ability to set the Line build out is not
required."
::= { ds1Compliances 5 }
ds1MibT1PriNCompliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"Compliance statement for using this MIB for ISDN
Primary Rate interfaces on T1 lines."
MODULE
MANDATORY-GROUPS { ds1NearEndConfigurationGroup,
ds1NearEndStatisticsGroup }
OBJECT dsx1LineType
SYNTAX INTEGER {
dsx1ESF(2) -- Intl Spec would be G704(2)
-- or I.431(4)
}
MIN-ACCESS read-only
DESCRIPTION
"Line type for T1 ISDN Primary Rate
interfaces."
OBJECT dsx1LineCoding
SYNTAX INTEGER {
dsx1B8ZS(2)
}
MIN-ACCESS read-only
DESCRIPTION
"Type of Zero Code Suppression for
T1 ISDN Primary Rate interfaces."
OBJECT dsx1SignalMode
SYNTAX INTEGER {
none(1), -- if there is no signaling channel
messageOriented(4)
}
MIN-ACCESS read-only
DESCRIPTION
"Possible signaling modes for
T1 ISDN Primary Rate interfaces."
OBJECT dsx1TransmitClockSource
SYNTAX INTEGER {
loopTiming(1)
}
MIN-ACCESS read-only
DESCRIPTION
"The transmit clock is derived from
received clock on ISDN Primary Rate
interfaces."
OBJECT dsx1Fdl
MIN-ACCESS read-only
DESCRIPTION
"Facilities Data Link usage on T1 ISDN
Primary Rate interfaces.
Note: Eventually dsx1Att-54016(4) is to be
used here since the line type is ESF."
OBJECT dsx1Channelization
MIN-ACCESS read-only
DESCRIPTION
"The ability to set the channelization
is not required."
OBJECT dsx1LineMode
MIN-ACCESS read-only
DESCRIPTION
"The ability to set the Line Mode is not
required."
OBJECT dsx1LineBuildOut
MIN-ACCESS read-only
DESCRIPTION
"The ability to set the Line build out is not
required."
::= { ds1Compliances 6 }
ds1MibE1PriNCompliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"Compliance statement for using this MIB for ISDN
Primary Rate interfaces on E1 lines."
MODULE
MANDATORY-GROUPS { ds1NearEndConfigurationGroup,
ds1NearEndStatisticsGroup }
OBJECT dsx1LineType
SYNTAX INTEGER {
dsx1E1CRC(5)
}
MIN-ACCESS read-only
DESCRIPTION
"Line type for E1 ISDN Primary Rate
interfaces."
OBJECT dsx1LineCoding
SYNTAX INTEGER {
dsx1HDB3(3)
}
MIN-ACCESS read-only
DESCRIPTION
"Type of Zero Code Suppression for
E1 ISDN Primary Rate interfaces."
OBJECT dsx1SignalMode
SYNTAX INTEGER {
messageOriented(4)
}
MIN-ACCESS read-only
DESCRIPTION
"Signaling on E1 ISDN Primary Rate interfaces
is always message oriented."
OBJECT dsx1TransmitClockSource
SYNTAX INTEGER {
loopTiming(1)
}
MIN-ACCESS read-only
DESCRIPTION
"The transmit clock is derived from received
clock on ISDN Primary Rate interfaces."
OBJECT dsx1Fdl
MIN-ACCESS read-only
DESCRIPTION
"Facilities Data Link usage on E1 ISDN
Primary Rate interfaces.
Note: There is a ’M-Channel’ in E1,
using National Bit Sa4 (G704,
Table 4a). It is used to implement
management features between ET
and NT. This is different to
FDL in T1, which is used to carry
control signals and performance
data. In E1, control and status
signals are carried using National
Bits Sa5, Sa6 and A (RAI Ind.).
This indicates that only the other(1) or
eventually the dsx1Fdl-none(8) bits should
be set in this object for E1 PRI."
OBJECT dsx1Channelization
MIN-ACCESS read-only
DESCRIPTION
"The ability to set the channelization is not
required."
OBJECT dsx1LineMode
MIN-ACCESS read-only
DESCRIPTION
"The ability to set the Line Mode is not required."
OBJECT dsx1LineBuildOut
MIN-ACCESS read-only
DESCRIPTION
"The ability to set the Line build out is not
required."
::= { ds1Compliances 7 }
-- units of conformance
ds1NearEndConfigGroup OBJECT-GROUP
OBJECTS { dsx1LineIndex,
dsx1TimeElapsed,
dsx1ValidIntervals,
dsx1LineType,
dsx1LineCoding,
dsx1SendCode,
dsx1CircuitIdentifier,
dsx1LoopbackConfig,
dsx1LineStatus,
dsx1SignalMode,
dsx1TransmitClockSource,
dsx1Fdl,
dsx1InvalidIntervals,
dsx1LineLength,
dsx1LoopbackStatus,
dsx1Ds1ChannelNumber,
dsx1Channelization }
STATUS deprecated
DESCRIPTION
"A collection of objects providing configuration
information applicable to all DS1 interfaces."
::= { ds1Groups 1 }
ds1NearEndStatisticsGroup OBJECT-GROUP
OBJECTS { dsx1CurrentIndex,
dsx1CurrentESs,
dsx1CurrentSESs,
dsx1CurrentSEFSs,
dsx1CurrentUASs,
dsx1CurrentCSSs,
dsx1CurrentPCVs,
dsx1CurrentLESs,
dsx1CurrentBESs,
dsx1CurrentDMs,
dsx1CurrentLCVs,
dsx1IntervalIndex,
dsx1IntervalNumber,
dsx1IntervalESs,
dsx1IntervalSESs,
dsx1IntervalSEFSs,
dsx1IntervalUASs,
dsx1IntervalCSSs,
dsx1IntervalPCVs,
dsx1IntervalLESs,
dsx1IntervalBESs,
dsx1IntervalDMs,
dsx1IntervalLCVs,
dsx1IntervalValidData,
dsx1TotalIndex,
dsx1TotalESs,
dsx1TotalSESs,
dsx1TotalSEFSs,
dsx1TotalUASs,
dsx1TotalCSSs,
dsx1TotalPCVs,
dsx1TotalLESs,
dsx1TotalBESs,
dsx1TotalDMs,
dsx1TotalLCVs }
STATUS current
DESCRIPTION
"A collection of objects providing statistics
information applicable to all DS1 interfaces."
::= { ds1Groups 2 }
ds1FarEndGroup OBJECT-GROUP
OBJECTS { dsx1FarEndCurrentIndex,
dsx1FarEndTimeElapsed,
dsx1FarEndValidIntervals,
dsx1FarEndCurrentESs,
dsx1FarEndCurrentSESs,
dsx1FarEndCurrentSEFSs,
dsx1FarEndCurrentUASs,
dsx1FarEndCurrentCSSs,
dsx1FarEndCurrentLESs,
dsx1FarEndCurrentPCVs,
dsx1FarEndCurrentBESs,
dsx1FarEndCurrentDMs,
dsx1FarEndInvalidIntervals,
dsx1FarEndIntervalIndex,
dsx1FarEndIntervalNumber,
dsx1FarEndIntervalESs,
dsx1FarEndIntervalSESs,
dsx1FarEndIntervalSEFSs,
dsx1FarEndIntervalUASs,
dsx1FarEndIntervalCSSs,
dsx1FarEndIntervalLESs,
dsx1FarEndIntervalPCVs,
dsx1FarEndIntervalBESs,
dsx1FarEndIntervalDMs,
dsx1FarEndIntervalValidData,
dsx1FarEndTotalIndex,
dsx1FarEndTotalESs,
dsx1FarEndTotalSESs,
dsx1FarEndTotalSEFSs,
dsx1FarEndTotalUASs,
dsx1FarEndTotalCSSs,
dsx1FarEndTotalLESs,
dsx1FarEndTotalPCVs,
dsx1FarEndTotalBESs,
dsx1FarEndTotalDMs }
STATUS current
DESCRIPTION
"A collection of objects providing remote
configuration and statistics information."
::= { ds1Groups 3 }
ds1DeprecatedGroup OBJECT-GROUP
OBJECTS { dsx1IfIndex,
dsx1FracIndex,
dsx1FracNumber,
dsx1FracIfIndex }
STATUS deprecated
DESCRIPTION
"A collection of obsolete objects that may be
implemented for backwards compatibility."
::= { ds1Groups 4 }
ds1NearEndOptionalConfigGroup OBJECT-GROUP
OBJECTS { dsx1LineStatusLastChange,
dsx1LineStatusChangeTrapEnable }
STATUS current
DESCRIPTION
"A collection of objects that may be implemented
on DS1 and DS2 interfaces."
::= { ds1Groups 5 }
ds1DS2Group OBJECT-GROUP
OBJECTS { dsx1LineIndex,
dsx1LineType,
dsx1LineCoding,
dsx1SendCode,
dsx1LineStatus,
dsx1SignalMode,
dsx1TransmitClockSource,
dsx1Channelization }
STATUS current
DESCRIPTION
"A collection of objects providing information
about DS2 (6,312 kbps) and E2 (8,448 kbps)
systems."
::= { ds1Groups 6 }
ds1TransStatsGroup OBJECT-GROUP
OBJECTS { dsx1CurrentESs,
dsx1CurrentSESs,
dsx1CurrentUASs,
dsx1IntervalESs,
dsx1IntervalSESs,
dsx1IntervalUASs,
dsx1TotalESs,
dsx1TotalSESs,
dsx1TotalUASs }
STATUS current
DESCRIPTION
"A collection of objects which are the
statistics which can be collected from a ds1
interface that is running transparent or unframed
lineType. Statistics not in this list should
return noSuchInstance."
::= { ds1Groups 7 }
ds1NearEndOptionalTrapGroup NOTIFICATION-GROUP
NOTIFICATIONS { dsx1LineStatusChange }
STATUS current
DESCRIPTION
"A collection of notifications that may be
implemented on DS1 and DS2 interfaces."
::= { ds1Groups 8 }
ds1ChanMappingGroup OBJECT-GROUP
OBJECTS { dsx1ChanMappedIfIndex }
STATUS current
DESCRIPTION
"A collection of objects that give an mapping of
DS3 Channel (dsx1Ds1ChannelNumber) to ifIndex."
::= { ds1Groups 9 }
ds1NearEndConfigurationGroup OBJECT-GROUP
OBJECTS { dsx1LineIndex,
dsx1TimeElapsed,
dsx1ValidIntervals,
dsx1LineType,
dsx1LineCoding,
dsx1SendCode,
dsx1CircuitIdentifier,
dsx1LoopbackConfig,
dsx1LineStatus,
dsx1SignalMode,
dsx1TransmitClockSource,
dsx1Fdl,
dsx1InvalidIntervals,
dsx1LineLength,
dsx1LoopbackStatus,
dsx1Ds1ChannelNumber,
dsx1Channelization,
dsx1LineMode,
dsx1LineBuildOut }
STATUS current
DESCRIPTION
"A collection of objects providing configuration
information applicable to all DS1 interfaces."
::= { ds1Groups 10 }
END
4. Acknowledgments
This document was produced by the AToM MIB Working Group. The Editor
would like to dedicate a special thanks to C. Mike Heard for
providing a top notch doctor review and many helpful suggestions, and
to acknowledge D. Fowler, Editor of RFC 2495, F. Baker and J. Watt
Editors of RFC 1406.
5. Security Considerations
There are a number of management objects defined in this MIB module
with a MAX-ACCESS clause of read-write. Such objects may be
considered sensitive or vulnerable in some network environments. The
support for SET operations in a non-secure environment without proper
protection can have a negative effect on network operations. The
specific objects and their sensitivities/vulnerabilities are as
follows.
Setting the following objects to incorrect values may result in
traffic interruptions:
dsx1LineType
dsx1LineCoding
dsx1SendCode
dsx1LoopbackConfig
dsx1SignalMode
dsx1TransmitClockSource
dsx1Fdl
dsx1LineLength
dsx1Channelization
dsx1LineMode
dsx1LineBuildOut
In the case of dsx1LineType, for example, both ends of a DS1/E1 must
have the same value in order for traffic to flow. In the case of
dsx1SendCode and dsx1LoopbackConfig, for another example, traffic may
stop transmitting when particular loopbacks are applied.
Setting the following object to an incorrect value will not harm the
traffic, but it may cause a circuit to be mis-identified and thereby
create difficulties for service personnel when attempting to
troubleshoot a problem:
dsx1CircuitIdentifier
Setting the following object can cause an increase in the number of
traps received by the network management station:
dsx1LineStatusChangeTrapEnable
The readable objects in this MIB module (i.e., the objects with a
MAX-ACCESS other than not-accessible) may be considered sensitive in
some environments since, collectively, they provide extensive
information about the performance of interfaces in DS1/E1/DS2/E2
equipment or networks and can reveal some aspects of their
configuration. In such environments, it is important to control even
GET and NOTIFY access to these objects and possibly to encrypt the
values of these objects when sending them over the network via SNMP.
SNMP versions prior to SNMPv3 did not include adequate security.
Even if the network itself is secure (for example by using IPSec),
even then, there is no control as to who on the secure network is
allowed to access and GET/SET (read/change/create/delete) the objects
in this MIB module.
It is RECOMMENDED that implementers consider the security features as
provided by the SNMPv3 framework (see [RFC3410], section 8),
including full support for the SNMPv3 cryptographic mechanisms (for
authentication and privacy).
Further, deployment of SNMP versions prior to SNMPv3 is NOT
RECOMMENDED. Instead, it is RECOMMENDED to deploy SNMPv3 and to
enable cryptographic security. It is then a customer/operator
responsibility to ensure that the SNMP entity giving access to an
instance of this MIB module is properly configured to give access to
the objects only to those principals (users) that have legitimate
rights to indeed GET or SET (change/create/delete) them.
6. References
6.1. Normative References
[RFC2578] McCloghrie, K., Perkins, D., and J. Schoenwaelder,
"Structure of Management Information Version 2
(SMIv2)", STD 58, RFC 2578, April 1999.
[RFC2579] McCloghrie, K., Perkins, D., and J. Schoenwaelder,
"Textual Conventions for SMIv2", STD 58, RFC 2579,
April 1999.
[RFC2580] McCloghrie, K., Perkins, D., and J. Schoenwaelder,
"Conformance Statements for SMIv2", STD 58, RFC 2580,
April 1999.
[RFC2863] McCloghrie, K. and F. Kastenholz, "The Interfaces
Group MIB", RFC 2863, June 2000.
[AT&T-TR-54016] AT&T Technical Reference, Requirements for
Interfacing Digital Terminal Equipment to Services
Employing the Extended Superframe Format, Publication
54016, May 1988.
[ANSI-T1.403] American National Standard for Telecommunications --
Carrier-to-Customer Installation - DS1 Metallic
Interface, T1.403, February 1989.
[CCITT-G.703] CCITT Specifications Volume III, Recommendation
G.703, Physical/Electrical Characteristics of
Hierarchical Digital Interfaces, April 1991.