Request for Comments: 3083 Cisco Systems
Category: Informational March 2001
Baseline Privacy Interface Management Information Base
for DOCSIS Compliant Cable Modems and Cable Modem Termination Systems
Status of this Memo
This memo provides information for the Internet community. It does
not specify an Internet standard of any kind. Distribution of this
memo is unlimited.
Copyright Notice
Copyright (C) The Internet Society (2001). 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 defines a basic set of managed objects for SNMP-
based (Simple Network Management Protocol) management of the Baseline
Privacy Interface (BPI), which provides data privacy for DOCSIS 1.0
(Data-Over-Cable Service Interface Specifications) compliant Cable
Modems and Cable Modem Termination Systems. This MIB is defined as
an extension to the DOCSIS Radio Frequency Interface MIB, RFC2670.
This memo specifies a MIB module in a manner that is compliant to the
SMIv2 (Structure of Management Information Version 2). The set of
objects is consistent with the SNMP framework and existing SNMP
standards.
CableLabs requires the implementation of this MIB in DOCSIS 1.0 cable
modems that implement the Baseline Privacy Interface, as a
prerequisite for DOCSIS 1.0 certification.
Table of Contents
1 The SNMP Management Framework ................................... 2
2 Glossary ........................................................ 3
2.1 Authorization key ............................................. 3
2.2 BPI ........................................................... 4
2.3 BPI+ .......................................................... 4
2.4 CATV .......................................................... 4
2.5 CM ............................................................ 4
2.6 CMTS .......................................................... 4
2.7 DOCSIS ........................................................ 4
2.8 Downstream .................................................... 4
2.9 Head-end ...................................................... 4
2.10 MAC Packet ................................................... 4
2.11 MCNS ......................................................... 5
2.12 RF ........................................................... 5
2.13 SID .......................................................... 5
2.14 TEK .......................................................... 5
2.15 Upstream ..................................................... 5
3 Overview ........................................................ 5
3.1 Structure of the MIB .......................................... 5
3.2 Management requirements ....................................... 6
3.3 Textual convention ............................................ 7
4 Definitions ..................................................... 8
5 Acknowledgments ................................................ 40
6 References ..................................................... 40
7 Security Considerations ........................................ 42
8 Intellectual Property .......................................... 43
9 Author's Address ............................................... 44
10 Full Copyright Statement ...................................... 45
1. The SNMP Management Framework
The SNMP Management Framework presently consists of five major
components:
o An overall architecture, described in RFC2571 [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, RFC1155 [2], STD 16, RFC1212 [3] and RFC1215 [4]. The
second version, called SMIv2, is described in STD 58, RFC2578
[5], RFC2579 [6] and RFC2580 [7].
o Message protocols for transferring management information. The
first version of the SNMP message protocol is called SNMPv1 and
described in STD 15, RFC1157 [8]. A second version of the SNMP
message protocol, which is not an Internet standards track
protocol, is called SNMPv2c and described in RFC1901 [9] and RFC
1906 [10]. The third version of the message protocol is called
SNMPv3 and described in RFC1906 [10], RFC2572 [11] and RFC2574
[12].
o Protocol operations for accessing management information. The
first set of protocol operations and associated PDU formats is
described in STD 15, RFC1157 [8]. A second set of protocol
operations and associated PDU formats is described in RFC1905
[13].
o A set of fundamental applications described in RFC2573 [14] and
the view-based access control mechanism described in RFC2575
[15].
A more detailed introduction to the current SNMP Management Framework
can be found in RFC2570 [24].
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.
2. Glossary
The terms in this document are derived either from normal cable
system usage, or from the documents associated with the Data Over
Cable Service Interface Specification process.
2.1. Authorization key
A key used to derive a key encryption key (used to encrypt TEKs), and
to derive message authentication keys. When the CMTS communicates
the authorization key to the CM, it encrypts the authorization key
using the RSA public key of the CM [22].
2.2. BPI - Baseline Privacy Interface
A term referring to the DOCSIS specification [18] for enabling simple
data privacy in the DOCSIS 1.0 system. Management of the BPI is the
focus of this document.
2.3. BPI+ - Baseline Privacy Plus Interface
A term referring to the DOCSIS specification [21] for enabling CM
authentication and data privacy in the DOCSIS 1.1 system. Management
of the BPI+ is not addressed in this document.
2.4. CATV
Originally "Community Antenna Television", now used to refer to any
cable or hybrid fiber and cable system used to deliver video signals
to a community.
2.5. CM - Cable Modem
A CM acts as a "slave" station in a DOCSIS compliant cable data
system.
2.6. CMTS - Cable Modem Termination System
A generic term covering a cable bridge or cable router in a head-end.
A CMTS acts as the master station in a DOCSIS compliant cable data
system. It is the only station that transmits downstream, and it
controls the scheduling of upstream transmissions by its associated
CMs.
2.7. DOCSIS
"Data-Over-Cable Service Interface Specifications". A term referring
to the ITU-T J.112 Annex B standard for cable modem systems [19].
2.8. Downstream
The direction from the head-end towards the subscriber.
2.9. Head-end
The origination point in most cable systems of the subscriber video
signals. Generally also the location of the CMTS equipment.
2.10. MAC Packet
A DOCSIS PDU.
2.11. MCNS
"Multimedia Cable Network System". Generally replaced in usage by
DOCSIS.
2.12. RF
Radio Frequency.
2.13 SID
Service ID. The SID identifies a particular upstream bandwidth
allocation and class-of-service management for DOCSIS, and identifies
a particular bidirectional security association for BPI.
2.14. TEK - Traffic Encryption Key
Traffic Encryption Key, which is used for DES encryption of upstream
and downstream traffic. When the CMTS communicates the TEK to the
CM, it encrypts the TEK using the key encryption key derived from the
authorization key.
2.15. Upstream
The direction from the subscriber towards the head-end.
3. Overview
This MIB provides a set of objects required for the management of the
Baseline Privacy Interface for DOCSIS compliant Cable Modems (CMs)
and Cable Modem Termination Systems (CMTSs). This MIB specification
is derived from the DOCSIS Baseline Privacy Interface specification
[18], which is an extension to the DOCSIS Radio Frequency Interface
specification [19].
Please note that this MIB specification is not sufficient for the
management of the DOCSIS Baseline Privacy Plus Interface
specification [21]. The working group expects to issue a MIB for the
management of BPI+ at a later time.
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 [23].
3.1. Structure of the MIB
This MIB consists of one group of CM-only objects (docsBpiCmGroup),
and one group of CMTS-only objects (docsBpiCmtsGroup).
The CM-only objects are organized into two tables:
o The docsBpiCmBaseTable contains objects for managing basic
Baseline Privacy parameters and counters, and for managing the
Authorization finite state machine.
o The docsBpiCmTEKTable contains objects for managing the Traffic
Encryption Key (TEK) finite state machine per SID.
The CMTS-only objects are organized into four sub-groups:
o The docsBpiCmtsBaseTable contains objects for managing basic
Baseline Privacy parameters and counters.
o The docsBpiCmtsAuthTable contains objects for managing the
Authorization association information per cable modem.
o The docsBpiCmtsTEKTable contains objects for managing the TEK
association information per SID.
o The docsBpiMulticastControl consists of two tables. The
docsBpiIpMulticastMapTable controls the mapping of downstream IP
multicast data traffic to downstream multicast SID values. The
docsBpiMulticastAuthTable controls which CMs are authorized to
receive downstream traffic transmitted over particular multicast
SIDs; a CM will receive TEKs corresponding to the multicast SIDs
for which it is authorized. The combination of these two tables
will limit the distribution of downstream IP multicast data
traffic to authorized CMs.
3.2. Management requirements
The Baseline Privacy Interface specification is documented in [18],
and is an extension to the Radio Frequency Interface specification
documented in [19]. In addition to the explicit requirements in this
specification, the CM and CMTS enabled for Baseline Privacy MUST
support all applicable DOCSIS and IETF requirements and MIB objects.
Specifications that identify relevant requirements and MIB objects
include the IETF Radio Frequency MIB [16], the IETF Cable Device MIB
[17], and the DOCSIS OSSI Specification [20].
The explicit management requirements of the Baseline Privacy
Interface, which motivate the development of the MIB in this
document, are detailed below:
o The CM and CMTS MUST support viewing relevant RSA public keys, for
future subscriber authentication applications.
o The Baseline Privacy management interface needs to support
operator configuration of Authorization and TEK Finite State
Machine (FSM) parameters, for performance tuning and security
incident handling. The CMTS MUST support viewing (and configuring
if possible) all FSM-related parameters, including baseline
privacy status (enabled or disabled), key lifetimes, key grace
times, and state timeout values. The CM MUST support viewing
these parameters where possible.
o The management interface needs to support operator analysis and
override of FSM behavior, for fault management, subscriber service
de-provisioning, and security incident handling. The CM MUST
support viewing the current FSM states. The CM and CMTS MUST
support viewing message error codes and message error strings, and
counters for invalid KEK and TEK events, for key expirations and
renewals, and for duplicate messages. The CM and CMTS MUST
support viewing current authorization key sequence numbers and key
expiration times for failure diagnosis.
o The management interface needs to support dynamic control of the
distribution of IP multicast data traffic. This control includes
forwarding IP multicast traffic to the correct multicast group
(SID), and managing the membership lists of each multicast group
(SID). The CMTS MUST support configuring and viewing all IP
multicast forwarding state, and all multicast group memberships,
within the MAC domains of the CMTS.
3.3. Textual convention
CableLabs has required the implementation of prior versions of this
MIB in DOCSIS 1.0 cable modems that implement the Baseline Privacy
Interface, as a prerequisite for DOCSIS 1.0 certification.
The Baseline Privacy Interface MIB contains eight MIB objects defined
with the (now obsolete) DisplayString textual convention, and one MIB
object defined with the (now undesirable) IpAddress textual
convention.
In the judgment of the working group, it is preferable to keep these
less-than-desirable textual conventions, in order to maintain
backward compatibility and interoperability with DOCSIS 1.0 cable
modems that implemented previous versions of this MIB.
4. Definitions
DOCS-BPI-MIB DEFINITIONS ::= BEGIN
IMPORTS
MODULE-IDENTITY, OBJECT-TYPE,
Integer32, Counter32, IpAddress
FROM SNMPv2-SMI
DisplayString, MacAddress, RowStatus, TruthValue, DateAndTime
FROM SNMPv2-TC
OBJECT-GROUP, MODULE-COMPLIANCE
FROM SNMPv2-CONF
ifIndex
FROM IF-MIB
docsIfMib, docsIfCmServiceId, docsIfCmtsServiceId
FROM DOCS-IF-MIB
;
docsBpiMIB MODULE-IDENTITY
LAST-UPDATED "200103130000Z"
ORGANIZATION "IETF IPCDN Working Group"
CONTACT-INFO "Rich Woundy
Postal: Cisco Systems
250 Apollo Drive
Chelmsford, MA 01824 U.S.A.
Tel: +1 978 244 8000
E-mail: rwoundy@cisco.com
IETF IPCDN Working Group
General Discussion: ipcdn@ietf.org
Subscribe: http://www.ietf.org/mailman/listinfo/ipcdn
Archive: ftp://ftp.ietf.org/ietf-mail-archive/ipcdn
Co-chairs: Richard Woundy, rwoundy@cisco.com
Andrew Valentine, a.valentine@eu.hns.com"
DESCRIPTION
"This is the MIB Module for the DOCSIS Baseline Privacy Interface
(BPI) at cable modems (CMs) and cable modem termination systems
(CMTSs). CableLabs requires the implementation of this MIB in
DOCSIS 1.0 cable modems that implement the Baseline Privacy
Interface, as a prerequisite for DOCSIS 1.0 certification."
REVISION "200103130000Z"
DESCRIPTION
"Version published as RFC3083."
REVISION "200011031930Z"
DESCRIPTION
"Modified by Richard Woundy to fix problems identified by the MIB
doctor. I marked docsBpiCmtsDefaultAuthGraceTime and
docsBpiCmtsDefaultTEKGraceTime as obsolete objects, to prevent OID
reassignment. Several object descriptions were also corrected."
REVISION "200002161930Z"
DESCRIPTION
"Initial version.
CableLabs requires the implementation of this MIB in certified DOCSIS
1.0 cable modems implementing the Baseline Privacy Interface, per
DOCSIS 1.0 engineering change notice oss-n-99027."
::= { docsIfMib 5 }
docsBpiMIBObjects OBJECT IDENTIFIER ::= { docsBpiMIB 1 }
-- Cable Modem Group
docsBpiCmObjects OBJECT IDENTIFIER ::= { docsBpiMIBObjects 1 }
--
-- The BPI base and authorization table for CMs, indexed by ifIndex
--
docsBpiCmBaseTable OBJECT-TYPE
SYNTAX SEQUENCE OF DocsBpiCmBaseEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table describes the basic and authorization-related Baseline
Privacy attributes of each CM MAC interface."
::= { docsBpiCmObjects 1 }
docsBpiCmBaseEntry OBJECT-TYPE
SYNTAX DocsBpiCmBaseEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Each entry contains objects describing attributes of one CM MAC
interface. An entry in this table exists for each ifEntry with an
ifType of docsCableMaclayer(127)."
INDEX { ifIndex }
::= { docsBpiCmBaseTable 1 }
DocsBpiCmBaseEntry ::= SEQUENCE {
docsBpiCmPrivacyEnable TruthValue,
docsBpiCmPublicKey OCTET STRING,
docsBpiCmAuthState INTEGER,
docsBpiCmAuthKeySequenceNumber Integer32,
docsBpiCmAuthExpires DateAndTime,
docsBpiCmAuthReset TruthValue,
docsBpiCmAuthGraceTime Integer32,
docsBpiCmTEKGraceTime Integer32,
docsBpiCmAuthWaitTimeout Integer32,
docsBpiCmReauthWaitTimeout Integer32,
docsBpiCmOpWaitTimeout Integer32,
docsBpiCmRekeyWaitTimeout Integer32,
docsBpiCmAuthRejectWaitTimeout Integer32,
docsBpiCmAuthRequests Counter32,
docsBpiCmAuthReplies Counter32,
docsBpiCmAuthRejects Counter32,
docsBpiCmAuthInvalids Counter32,
docsBpiCmAuthRejectErrorCode INTEGER,
docsBpiCmAuthRejectErrorString DisplayString,
docsBpiCmAuthInvalidErrorCode INTEGER,
docsBpiCmAuthInvalidErrorString DisplayString
}
docsBpiCmPrivacyEnable OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object identifies whether this CM is provisioned to run
Baseline Privacy. This is analogous to the presence (or absence)
of the Baseline Privacy Configuration Setting option. The status
of each individual SID with respect to Baseline Privacy is
captured in the docsBpiCmTEKPrivacyEnable object."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Appendix A.1.1."
::= { docsBpiCmBaseEntry 1 }
docsBpiCmPublicKey OBJECT-TYPE
SYNTAX OCTET STRING (SIZE (74 | 106 | 140 | 270))
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is a DER-encoded RSAPublicKey ASN.1 type
string, as defined in the RSA Encryption Standard (PKCS #1) [22],
corresponding to the public key of the CM. The 74, 106, 140, and
270 byte key encoding lengths correspond to 512 bit, 768 bit, 1024
bit, and 2048 public moduli respectively."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Section 4.2.2.4."
::= { docsBpiCmBaseEntry 2 }
docsBpiCmAuthState OBJECT-TYPE
SYNTAX INTEGER {
authWait(2),
authorized(3),
reauthWait(4),
authRejectWait(5)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the state of the CM authorization
FSM. The start state indicates that FSM is in its initial state."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Section 4.1.2.1."
::= { docsBpiCmBaseEntry 3 }
docsBpiCmAuthKeySequenceNumber OBJECT-TYPE
SYNTAX Integer32 (0..15)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the authorization key sequence number
for this FSM."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Sections 4.2.1.2
and 4.2.2.10."
::= { docsBpiCmBaseEntry 4 }
docsBpiCmAuthExpires OBJECT-TYPE
SYNTAX DateAndTime
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the actual clock time when the current
authorization for this FSM expires. If the CM does not have an active
authorization, then the value is of the expiration date and time of
the last active authorization."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Sections 4.2.1.2
and 4.2.2.9."
::= { docsBpiCmBaseEntry 5 }
docsBpiCmAuthReset OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"Setting this object to TRUE generates a Reauthorize event in the
authorization FSM. Reading this object always returns FALSE."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Section 4.1.2.3.4."
::= { docsBpiCmBaseEntry 6 }
docsBpiCmAuthGraceTime OBJECT-TYPE
SYNTAX Integer32 (1..1800)
UNITS "seconds"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the grace time for an authorization key.
A CM is expected to start trying to get a new authorization key
beginning AuthGraceTime seconds before the authorization key actually
expires."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Appendix A.1.1.1.3."
::= { docsBpiCmBaseEntry 7 }
docsBpiCmTEKGraceTime OBJECT-TYPE
SYNTAX Integer32 (1..1800)
UNITS "seconds"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the grace time for a TEK. A CM is
expected to start trying to get a new TEK beginning TEKGraceTime
seconds before the TEK actually expires."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Appendix A.1.1.1.6."
::= { docsBpiCmBaseEntry 8 }
docsBpiCmAuthWaitTimeout OBJECT-TYPE
SYNTAX Integer32 (1..30)
UNITS "seconds"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the Authorize Wait Timeout."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Appendix A.1.1.1.1."
::= { docsBpiCmBaseEntry 9 }
docsBpiCmReauthWaitTimeout OBJECT-TYPE
SYNTAX Integer32 (1..30)
UNITS "seconds"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the Reauthorize Wait Timeout in seconds."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Appendix A.1.1.1.2."
::= { docsBpiCmBaseEntry 10 }
docsBpiCmOpWaitTimeout OBJECT-TYPE
SYNTAX Integer32 (1..10)
UNITS "seconds"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the Operational Wait Timeout in seconds."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Appendix A.1.1.1.4."
::= { docsBpiCmBaseEntry 11 }
docsBpiCmRekeyWaitTimeout OBJECT-TYPE
SYNTAX Integer32 (1..10)
UNITS "seconds"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the Rekey Wait Timeout in seconds."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Appendix A.1.1.1.5."
::= { docsBpiCmBaseEntry 12 }
docsBpiCmAuthRejectWaitTimeout OBJECT-TYPE
SYNTAX Integer32 (1..600)
UNITS "seconds"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the Authorization Reject Wait Timeout in
seconds."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Appendix A.1.1.1.7."
::= { docsBpiCmBaseEntry 13 }
docsBpiCmAuthRequests OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the count of times the CM has
transmitted an Authorization Request message."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Section 4.2.1.1."
::= { docsBpiCmBaseEntry 14 }
docsBpiCmAuthReplies OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the count of times the CM has
received an Authorization Reply message."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Section 4.2.1.2."
::= { docsBpiCmBaseEntry 15 }
docsBpiCmAuthRejects OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the count of times the CM has
received an Authorization Reject message."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Section 4.2.1.3."
::= { docsBpiCmBaseEntry 16 }
docsBpiCmAuthInvalids OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the count of times the CM has
received an Authorization Invalid message."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Section 4.2.1.7."
::= { docsBpiCmBaseEntry 17 }
docsBpiCmAuthRejectErrorCode OBJECT-TYPE
SYNTAX INTEGER {
none(1),
unknown(2),
unauthorizedCm(3),
unauthorizedSid(4)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the enumerated description of the
Error-Code in most recent Authorization Reject message received by
the CM. This has value unknown(2) if the last Error-Code value was
0, and none(1) if no Authorization Reject message has been received
since reboot."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Sections 4.2.1.3
and 4.2.2.16."
::= { docsBpiCmBaseEntry 18 }
docsBpiCmAuthRejectErrorString OBJECT-TYPE
SYNTAX DisplayString (SIZE (0..128))
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the Display-String in most recent
Authorization Reject message received by the CM. This is a zero
length string if no Authorization Reject message has been received
since reboot."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Sections 4.2.1.3
and 4.2.2.6."
::= { docsBpiCmBaseEntry 19 }
docsBpiCmAuthInvalidErrorCode OBJECT-TYPE
SYNTAX INTEGER {
none(1),
unknown(2),
unauthorizedCm(3),
unsolicited(5),
invalidKeySequence(6),
keyRequestAuthenticationFailure(7)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the enumerated description of the
Error-Code in most recent Authorization Invalid message received by
the CM. This has value unknown(2) if the last Error-Code value was
0, and none(1) if no Authorization Invalid message has been received
since reboot."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Sections 4.2.1.7
and 4.2.2.16."
::= { docsBpiCmBaseEntry 20 }
docsBpiCmAuthInvalidErrorString OBJECT-TYPE
SYNTAX DisplayString (SIZE (0..128))
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the Display-String in most recent
Authorization Invalid message received by the CM. This is a zero
length string if no Authorization Invalid message has been received
since reboot."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Sections 4.2.1.7
and 4.2.2.6."
::= { docsBpiCmBaseEntry 21 }
--
-- The CM TEK Table, indexed by ifIndex and SID
--
docsBpiCmTEKTable OBJECT-TYPE
SYNTAX SEQUENCE OF DocsBpiCmTEKEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table describes the attributes of each CM Traffic Encryption Key
(TEK) association. The CM maintains (no more than) one TEK association
per SID per CM MAC interface."
::= { docsBpiCmObjects 2 }
docsBpiCmTEKEntry OBJECT-TYPE
SYNTAX DocsBpiCmTEKEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Each entry contains objects describing the TEK association attributes
of one SID. The CM MUST create one entry per unicast SID, regardless
of whether the SID was obtained from a Registration Response message,
or from an Authorization Reply message."
INDEX { ifIndex, docsIfCmServiceId }
::= { docsBpiCmTEKTable 1 }
DocsBpiCmTEKEntry ::= SEQUENCE {
docsBpiCmTEKPrivacyEnable TruthValue,
docsBpiCmTEKState INTEGER,
docsBpiCmTEKExpiresOld DateAndTime,
docsBpiCmTEKExpiresNew DateAndTime,
docsBpiCmTEKKeyRequests Counter32,
docsBpiCmTEKKeyReplies Counter32,
docsBpiCmTEKKeyRejects Counter32,
docsBpiCmTEKInvalids Counter32,
docsBpiCmTEKAuthPends Counter32,
docsBpiCmTEKKeyRejectErrorCode INTEGER,
docsBpiCmTEKKeyRejectErrorString DisplayString,
docsBpiCmTEKInvalidErrorCode INTEGER,
docsBpiCmTEKInvalidErrorString DisplayString
}
docsBpiCmTEKPrivacyEnable OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object identifies whether this SID is provisioned to run
Baseline Privacy. This is analogous to enabling Baseline Privacy on
a provisioned SID using the Class-of-Service Privacy Enable option.
Baseline Privacy is not effectively enabled for any SID unless
Baseline Privacy is enabled for the CM, which is managed via the
docsBpiCmPrivacyEnable object."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Appendix A.1.2."
::= { docsBpiCmTEKEntry 1 }
docsBpiCmTEKState OBJECT-TYPE
SYNTAX INTEGER {
start(1),
opWait(2),
opReauthWait(3),
operational(4),
rekeyWait(5),
rekeyReauthWait(6)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the state of the indicated TEK FSM.
The start(1) state indicates that FSM is in its initial state."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Section 4.1.3.1."
::= { docsBpiCmTEKEntry 2 }
docsBpiCmTEKExpiresOld OBJECT-TYPE
SYNTAX DateAndTime
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the actual clock time for expiration
of the immediate predecessor of the most recent TEK for this FSM.
If this FSM has only one TEK, then the value is the time of activation
of this FSM."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Sections 4.2.1.5 and
4.2.2.9."
::= { docsBpiCmTEKEntry 3 }
docsBpiCmTEKExpiresNew OBJECT-TYPE
SYNTAX DateAndTime
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the actual clock time for expiration
of the most recent TEK for this FSM."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Sections 4.2.1.5 and
4.2.2.9."
::= { docsBpiCmTEKEntry 4 }
docsBpiCmTEKKeyRequests OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the count of times the CM has transmitted
a Key Request message."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Section 4.2.1.4."
::= { docsBpiCmTEKEntry 5 }
docsBpiCmTEKKeyReplies OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the count of times the CM has received
a Key Reply message, including a message whose authentication failed."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Section 4.2.1.5."
::= { docsBpiCmTEKEntry 6 }
docsBpiCmTEKKeyRejects OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the count of times the CM has received
a Key Reject message, including a message whose authentication failed."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Section 4.2.1.6."
::= { docsBpiCmTEKEntry 7 }
docsBpiCmTEKInvalids OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the count of times the CM has received
a TEK Invalid message, including a message whose authentication failed."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Section 4.2.1.8."
::= { docsBpiCmTEKEntry 8 }
docsBpiCmTEKAuthPends OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the count of times an Authorization
Pending (Auth Pend) event occurred in this FSM."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Section 4.1.3.3.3."
::= { docsBpiCmTEKEntry 9 }
docsBpiCmTEKKeyRejectErrorCode OBJECT-TYPE
SYNTAX INTEGER {
none(1),
unknown(2),
unauthorizedSid(4)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the enumerated description of the
Error-Code in most recent Key Reject message received by the CM. This
has value unknown(2) if the last Error-Code value was 0, and none(1)
if no Key Reject message has been received since reboot."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Sections 4.1.2.6
and 4.2.2.16."
::= { docsBpiCmTEKEntry 10 }
docsBpiCmTEKKeyRejectErrorString OBJECT-TYPE
SYNTAX DisplayString (SIZE (0..128))
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the Display-String in most recent Key
Reject message received by the CM. This is a zero length string if no
Key Reject message has been received since reboot."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Sections 4.1.2.6
and 4.2.2.6."
::= { docsBpiCmTEKEntry 11 }
docsBpiCmTEKInvalidErrorCode OBJECT-TYPE
SYNTAX INTEGER {
none(1),
unknown(2),
invalidKeySequence(6)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the enumerated description of the
Error-Code in most recent TEK Invalid message received by the CM.
This has value unknown(2) if the last Error-Code value was 0, and
none(1) if no TEK Invalid message has been received since reboot."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Sections 4.1.2.8
and 4.2.2.16."
::= { docsBpiCmTEKEntry 12 }
docsBpiCmTEKInvalidErrorString OBJECT-TYPE
SYNTAX DisplayString (SIZE (0..128))
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the Display-String in most recent TEK
Invalid message received by the CM. This is a zero length string if
no TEK Invalid message has been received since reboot."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Sections 4.1.2.8
and 4.2.2.6."
::= { docsBpiCmTEKEntry 13 }
-- Cable Modem Termination System Group
docsBpiCmtsObjects OBJECT IDENTIFIER ::= { docsBpiMIBObjects 2 }
--
-- The BPI base table for CMTSs, indexed by ifIndex
--
docsBpiCmtsBaseTable OBJECT-TYPE
SYNTAX SEQUENCE OF DocsBpiCmtsBaseEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table describes the basic Baseline Privacy attributes of each
CMTS MAC interface."
::= { docsBpiCmtsObjects 1 }
docsBpiCmtsBaseEntry OBJECT-TYPE
SYNTAX DocsBpiCmtsBaseEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Each entry contains objects describing attributes of one CMTS MAC
interface. An entry in this table exists for each ifEntry with an
ifType of docsCableMaclayer(127)."
INDEX { ifIndex }
::= { docsBpiCmtsBaseTable 1 }
DocsBpiCmtsBaseEntry ::= SEQUENCE {
docsBpiCmtsDefaultAuthLifetime Integer32,
docsBpiCmtsDefaultTEKLifetime Integer32,
docsBpiCmtsDefaultAuthGraceTime Integer32,
docsBpiCmtsDefaultTEKGraceTime Integer32,
docsBpiCmtsAuthRequests Counter32,
docsBpiCmtsAuthReplies Counter32,
docsBpiCmtsAuthRejects Counter32,
docsBpiCmtsAuthInvalids Counter32
}
docsBpiCmtsDefaultAuthLifetime OBJECT-TYPE
SYNTAX Integer32 (1..6048000)
UNITS "seconds"
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The value of this object is the default lifetime, in seconds, the
CMTS assigns to a new authorization key."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Appendix A.2."
::= { docsBpiCmtsBaseEntry 1 }
docsBpiCmtsDefaultTEKLifetime OBJECT-TYPE
SYNTAX Integer32 (1..604800)
UNITS "seconds"
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The value of this object is the default lifetime, in seconds, the
CMTS assigns to a new Traffic Encryption Key (TEK)."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Appendix A.2."
::= { docsBpiCmtsBaseEntry 2 }
-- Note: the following two objects have been obsoleted from this MIB.
docsBpiCmtsDefaultAuthGraceTime OBJECT-TYPE
SYNTAX Integer32 (1..1800)
UNITS "seconds"
MAX-ACCESS read-write
STATUS obsolete
DESCRIPTION
"This object was obsoleted because the provisioning system, not the CMTS,
manages the authorization key grace time for DOCSIS CMs."
::= { docsBpiCmtsBaseEntry 3 }
docsBpiCmtsDefaultTEKGraceTime OBJECT-TYPE
SYNTAX Integer32 (1..1800)
UNITS "seconds"
MAX-ACCESS read-write
STATUS obsolete
DESCRIPTION
"This object was obsoleted because the provisioning system, not the CMTS,
manages the Traffic Encryption Key (TEK) grace time for DOCSIS CMs."
::= { docsBpiCmtsBaseEntry 4 }
docsBpiCmtsAuthRequests OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the count of times the CMTS has
received an Authorization Request message from any CM."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Section 4.2.1.1."
::= { docsBpiCmtsBaseEntry 5 }
docsBpiCmtsAuthReplies OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the count of times the CMTS has
transmitted an Authorization Reply message to any CM."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Section 4.2.1.2."
::= { docsBpiCmtsBaseEntry 6 }
docsBpiCmtsAuthRejects OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the count of times the CMTS has
transmitted an Authorization Reject message to any CM."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Section 4.2.1.3."
::= { docsBpiCmtsBaseEntry 7 }
docsBpiCmtsAuthInvalids OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the count of times the CMTS has
transmitted an Authorization Invalid message to any CM."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Section 4.2.1.7."
::= { docsBpiCmtsBaseEntry 8 }
--
-- The CMTS Authorization Table, indexed by ifIndex and CM MAC address
--
docsBpiCmtsAuthTable OBJECT-TYPE
SYNTAX SEQUENCE OF DocsBpiCmtsAuthEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table describes the attributes of each CM authorization
association. The CMTS maintains one authorization association with
each Baseline Privacy-enabled CM on each CMTS MAC interface."
::= { docsBpiCmtsObjects 2 }
docsBpiCmtsAuthEntry OBJECT-TYPE
SYNTAX DocsBpiCmtsAuthEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Each entry contains objects describing attributes of one
authorization association. The CMTS MUST create one entry per CM per
MAC interface, based on the receipt of an Authorization Request
message, and MUST not delete the entry before the CM authorization
permanently expires."
INDEX { ifIndex, docsBpiCmtsAuthCmMacAddress }
::= { docsBpiCmtsAuthTable 1 }
DocsBpiCmtsAuthEntry ::= SEQUENCE {
docsBpiCmtsAuthCmMacAddress MacAddress,
docsBpiCmtsAuthCmPublicKey OCTET STRING,
docsBpiCmtsAuthCmKeySequenceNumber Integer32,
docsBpiCmtsAuthCmExpires DateAndTime,
docsBpiCmtsAuthCmLifetime Integer32,
docsBpiCmtsAuthCmGraceTime Integer32,
docsBpiCmtsAuthCmReset INTEGER,
docsBpiCmtsAuthCmRequests Counter32,
docsBpiCmtsAuthCmReplies Counter32,
docsBpiCmtsAuthCmRejects Counter32,
docsBpiCmtsAuthCmInvalids Counter32,
docsBpiCmtsAuthRejectErrorCode INTEGER,
docsBpiCmtsAuthRejectErrorString DisplayString,
docsBpiCmtsAuthInvalidErrorCode INTEGER,
docsBpiCmtsAuthInvalidErrorString DisplayString
}
docsBpiCmtsAuthCmMacAddress OBJECT-TYPE
SYNTAX MacAddress
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The value of this object is the physical address of the CM to
which the authorization association applies."
::= { docsBpiCmtsAuthEntry 1 }
docsBpiCmtsAuthCmPublicKey OBJECT-TYPE
SYNTAX OCTET STRING
(SIZE (0 | 74 | 106 | 140 | 270))
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is a DER-encoded RSAPublicKey ASN.1 type
string, as defined in the RSA Encryption Standard (PKCS #1) [22],
corresponding to the public key of the CM. The 74, 106, 140, and
270 byte key encoding lengths correspond to 512 bit, 768 bit, 1024
bit, and 2048 public moduli respectively. This is a zero-length
string if the CMTS does not retain the public key."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Section 4.2.2.4."
::= { docsBpiCmtsAuthEntry 2 }
docsBpiCmtsAuthCmKeySequenceNumber OBJECT-TYPE
SYNTAX Integer32 (0..15)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the authorization key sequence number
for this CM."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Sections 4.2.1.2
and 4.2.2.10."
::= { docsBpiCmtsAuthEntry 3 }
docsBpiCmtsAuthCmExpires OBJECT-TYPE
SYNTAX DateAndTime
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the actual clock time when the current
authorization for this CM expires. If this CM does not have an
active authorization, then the value is of the expiration date and
time of the last active authorization."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Sections 4.2.1.2
and 4.2.2.9."
::= { docsBpiCmtsAuthEntry 4 }
docsBpiCmtsAuthCmLifetime OBJECT-TYPE
SYNTAX Integer32 (1..6048000)
UNITS "seconds"
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The value of this object is the lifetime, in seconds, the CMTS
assigns to an authorization key for this CM."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Section 4.2.1.2
and Appendix A.2."
::= { docsBpiCmtsAuthEntry 5 }
docsBpiCmtsAuthCmGraceTime OBJECT-TYPE
SYNTAX Integer32 (1..1800)
UNITS "seconds"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the grace time for the authorization key
in seconds. The CM is expected to start trying to get a new
authorization key beginning AuthGraceTime seconds before the
authorization key actually expires."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Appendix A.1.1.1.3."
::= { docsBpiCmtsAuthEntry 6 }
docsBpiCmtsAuthCmReset OBJECT-TYPE
SYNTAX INTEGER {
noResetRequested(1),
invalidateAuth(2),
sendAuthInvalid(3),
invalidateTeks(4)
}
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"Setting this object to invalidateAuth(2) causes the CMTS to
invalidate the current CM authorization key, but not to transmit an
Authorization Invalid message nor to invalidate unicast TEKs. Setting
this object to sendAuthInvalid(3) causes the CMTS to invalidate the
current CM authorization key, and to transmit an Authorization Invalid
message to the CM, but not to invalidate unicast TEKs. Setting this
object to invalidateTeks(4) causes the CMTS to invalidate the current
CM authorization key, to transmit an Authorization Invalid message to
the CM, and to invalidate all unicast TEKs associated with this CM
authorization. Reading this object returns the most-recently-set value
of this object, or returns noResetRequested(1) if the object has not
been set since the last CMTS reboot."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Sections 4.1.2.3.4,
4.1.2.3.5, and 4.1.3.3.5."
::= { docsBpiCmtsAuthEntry 7 }
docsBpiCmtsAuthCmRequests OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the count of times the CMTS has
received an Authorization Request message from this CM."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Section 4.2.1.1."
::= { docsBpiCmtsAuthEntry 8 }
docsBpiCmtsAuthCmReplies OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the count of times the CMTS has
transmitted an Authorization Reply message to this CM."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Section 4.2.1.2."
::= { docsBpiCmtsAuthEntry 9 }
docsBpiCmtsAuthCmRejects OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the count of times the CMTS has
transmitted an Authorization Reject message to this CM."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Section 4.2.1.3."
::= { docsBpiCmtsAuthEntry 10 }
docsBpiCmtsAuthCmInvalids OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the count of times the CMTS has
transmitted an Authorization Invalid message to this CM."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Section 4.2.1.7."
::= { docsBpiCmtsAuthEntry 11 }
docsBpiCmtsAuthRejectErrorCode OBJECT-TYPE
SYNTAX INTEGER {
none(1),
unknown(2),
unauthorizedCm(3),
unauthorizedSid(4)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the enumerated description of the
Error-Code in most recent Authorization Reject message transmitted to
the CM. This has value unknown(2) if the last Error-Code value was
0, and none(1) if no Authorization Reject message has been transmitted
to the CM."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Sections 4.2.1.3
and 4.2.2.16."
::= { docsBpiCmtsAuthEntry 12 }
docsBpiCmtsAuthRejectErrorString OBJECT-TYPE
SYNTAX DisplayString (SIZE (0..128))
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the Display-String in most recent
Authorization Reject message transmitted to the CM. This is a
zero length string if no Authorization Reject message has been
transmitted to the CM."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Sections 4.2.1.3
and 4.2.2.6."
::= { docsBpiCmtsAuthEntry 13 }
docsBpiCmtsAuthInvalidErrorCode OBJECT-TYPE
SYNTAX INTEGER {
none(1),
unknown(2),
unauthorizedCm(3),
unsolicited(5),
invalidKeySequence(6),
keyRequestAuthenticationFailure(7)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the enumerated description of the
Error-Code in most recent Authorization Invalid message transmitted
to the CM. This has value unknown(2) if the last Error-Code value was
0, and none(1) if no Authorization Invalid message has been
transmitted to the CM."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Sections 4.2.1.7
and 4.2.2.16."
::= { docsBpiCmtsAuthEntry 14 }
docsBpiCmtsAuthInvalidErrorString OBJECT-TYPE
SYNTAX DisplayString (SIZE (0..128))
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of this object is the Display-String in most recent
Authorization Invalid message transmitted to the CM. This is a
zero length string if no Authorization Invalid message has been
transmitted to the CM."
REFERENCE
"DOCSIS Baseline Privacy Interface Specification, Sections 4.2.1.7
and 4.2.2.6."
::= { docsBpiCmtsAuthEntry 15 }
--
-- The CMTS TEK Table, indexed by ifIndex and SID
--
docsBpiCmtsTEKTable OBJECT-TYPE
SYNTAX SEQUENCE OF DocsBpiCmtsTEKEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table describes the attributes of each CM Traffic Encryption
Key (TEK) association. The CMTS maintains one TEK association per BPI
SID on each CMTS MAC interface."
::= { docsBpiCmtsObjects 3 }
docsBpiCmtsTEKEntry OBJECT-TYPE
SYNTAX DocsBpiCmtsTEKEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Each entry contains objects describing attributes of one TEK
association on a particular CMTS MAC interface. The CMTS MUST create
one entry per SID per MAC interface, based on the receipt of an
Key Request message, and MUST not delete the entry before the CM
authorization for the SID permanently expires."