Request for Comments: 2669 @Home Network
Category: Proposed Standard August 1999
DOCSIS Cable Device MIB
Cable Device Management Information Base
for DOCSIS compliant Cable Modems and
Cable Modem Termination Systems
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 defines a basic set of managed objects for SNMP-
based management of DOCSIS 1.0 compliant Cable Modems and Cable Modem
Termination Systems.
This memo specifies a MIB module in a manner that is compliant to the
SNMP SMIv2 [5][6][7]. The set of objects is consistent with the SNMP
framework and existing SNMP standards.
This memo is a product of the IPCDN working group within the Internet
Engineering Task Force. Comments are solicited and should be
addressed to the working group's mailing list at ipcdn@terayon.com
and/or the author.
Table of Contents
1 The SNMP Management Framework ................................... 2
2 Glossary ........................................................ 3
2.1 CATV .......................................................... 3
2.2 CM ............................................................ 3
2.3 CMTS .......................................................... 4
2.4 DOCSIS ........................................................ 4
2.5 Downstream .................................................... 4
2.6 Head-end ...................................................... 4
2.7 MAC Packet .................................................... 4
2.8 MCNS .......................................................... 4
2.9 RF ............................................................ 4
2.10 Upstream ..................................................... 4
3 Overview ........................................................ 4
3.1 Structure of the MIB .......................................... 5
3.2 Management requirements ....................................... 6
3.2.1 Handling of Software upgrades ............................... 6
3.2.2 Events and Traps ............................................ 6
3.2.3 Trap Throttling ............................................. 8
3.2.3.1 Trap rate throttling ...................................... 8
3.2.3.2 Limiting the trap rate .................................... 8
3.3 Protocol Filters .............................................. 9
3.3.1 Inbound LLC Filters - docsDevFilterLLCTable ................ 10
3.3.2 Special Filters ............................................ 10
3.3.2.1 IP Spoofing Filters - docsDevCpeTable .................... 10
3.3.2.2 SNMP Access Filters - docsDevNmAccessTable ............... 10
3.3.3 IP Filtering - docsDevIpFilterTable ........................ 11
3.3.4 Outbound LLC Filters ....................................... 13
4 Definitions .................................................... 13
5 Acknowledgments ................................................ 51
6 References ..................................................... 51
7 Security Considerations ........................................ 52
8 Intellectual Property .......................................... 54
9 Author's Address ............................................... 54
10 Full Copyright Statement ...................................... 55
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], STD 58, RFC2579 [6] and STD 58, 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].
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. 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.
2.2. CM Cable Modem.
A CM acts as a "slave" station in a DOCSIS compliant cable data
system.
2.3. 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.
2.4. DOCSIS
"Data Over Cable Interface Specification". A term referring to the
ITU-T J.112 Annex B standard for cable modem systems [20].
2.5. Downstream
The direction from the head-end towards the subscriber.
2.6. Head-end
The origination point in most cable systems of the subscriber video
signals. Generally also the location of the CMTS equipment.
2.7. MAC Packet
A DOCSIS PDU.
2.8. MCNS
"Multimedia Cable Network System". Generally replaced in usage by
DOCSIS.
2.9. RF
Radio Frequency.
2.10. Upstream
The direction from the subscriber towards the head-end.
3. Overview
This MIB provides a set of objects required for the management of
DOCSIS compliant Cable Modems (CM) and Cable Modem Termination
Systems (CMTS). The specification is derived from the DOCSIS Radio
Frequency Interface specification [16]. Please note that the DOCSIS
1.0 standard only requires Cable Modems to implement SNMPv1 and to
process IPv4 customer traffic. Design choices in this MIB reflect
those requirements. Future versions of the DOCSIS standard are
expected to require support for SNMPv3 and IPv6 as well.
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 [19].
3.1. Structure of the MIB
This MIB is structured into seven groups:
o The docsDevBase group extends the MIB-II 'system' group with
objects needed for cable device system management.
o The docsDevNmAccessGroup provides a minimum level of SNMP
access security (see Section 3 of [18]).
o The docsDevSoftware group provides information for network-
downloadable software upgrades. See "Handling of Software
Upgrades" below..
o The docsDevServer group provides information about the
progress of the interaction between the CM or CMTS and
various provisioning servers.
o The docsDevEvent group provides control and logging for event
reporting.
o The docsDevFilter group configures filters at link layer and
IP layer for bridged data traffic. This group consists of a
link-layer filter table, docsDevFilterLLCTable, which is used
to manage the processing and forwarding of non-IP traffic; an
IP packet classifier table, docsDevFilterIpTable, which is
used to map classes of packets to specific policy actions; a
policy table, docsDevFilterPolicyTable, which maps zero or
more policy actions onto a specific packet classification,
and one or more policy action tables.
At this time, this MIB specifies only one policy action
table, docsDevFilterTosTable, which allows the manipulation
of the type of services bits in an IP packet based on
matching some criteria. The working group may add additional
policy types and action tables in the future, for example to
allow QOS to modem service identifier assignment based on
destination.
o The docsDevCpe group provides control over which IP addresses
may be used by customer premises equipment (e.g. PCs)
serviced by a given cable modem. This provides anti-spoofing
control at the point of origin for a large cable modem
system. This group is separate from docsDevFilter primarily
as this group is only implemented on the Cable Modem (CM) and
MUST NOT be implemented on the Cable Modem Termination System
(CMTS).
3.2. Management requirements
3.2.1. Handling of Software upgrades
The Cable Modem software upgrade process is documented in [16]. From
a network management station, the operator:
o sets docsDevSwServer to the address of the TFTP server for
software upgrades
o sets docsDevSwFilename to the file pathname of the software
upgrade image
o sets docsDevSwAdminStatus to upgrade-from-mgt
One reason for the SNMP-initiated upgrade is to allow loading of a
temporary software image (e.g., special diagnostic software) that
differs from the software normally used on that device without
changing the provisioning database.
Note that software upgrades should not be accepted blindly by the
cable device. The cable device may refuse an upgrade if:
o The download is incomplete.
o The file contents are incomplete or damaged.
o The software is not intended for that hardware device (may
include the case of a feature set that has not been purchased
for this device).
3.2.2. Events and Traps
This MIB provides control facilities for reporting events through
syslog, traps, and non-volatile logging. If events are reported
through traps, the specified conventions must be followed. Other
means of event reporting are outside the scope of this document.
The definition and coding of events is vendor-specific. In deference
to the network operator who must troubleshoot multi-vendor networks,
the circumstances and meaning of each event should be reported as
human-readable text. Vendors SHOULD provide time-of-day clocks in
CMs to provide useful timestamping of events.
For each vendor-specific event that is reportable via TRAP, the
vendor must create an enterprise-specific trap definition. Trap
definitions MUST include the event reason encoded as DisplayString
and should be defined as:
trapName NOTIFICATION-TYPE
OBJECTS {
ifIndex,
eventReason,
other useful objects
}
STATUS current
DESCRIPTION
"trap description"
::= Object Id
Note that ifIndex is only included if the event or trap is interface
related.
An example (fake) vendor defined trap might be:
xyzVendorModemDropout NOTIFICATION-TYPE
OBJECTS {
eventReason,
xyzModemHighWatermarkCount
}
STATUS current
DESCRIPTION
"Sent by a CMTS when a configurable number of modems
(xyzModemHysteresis) de-register or become unreachable during
the sampling period (5 minutes). Used to warn a management
station about a catastrophic cable plant outage."
::= { xyzTraps 23 }
In this example eventReason is a DisplayString providing a human
readable error message, and xyzModemHighWatermarkCount is a Gauge32
which indicates the maximum number of modems during the epoch.
The last digit of the trap OID for enterprise-specific traps must
match docsDevEvId. For SNMPv1-capable Network Management systems,
this is necessary to correlate the event type to the trap type. Many
Network Management systems are only capable of trap filtering on an
enterprise and single-last-digit basis.
3.2.3. Trap Throttling
The CM and CMTS MUST provide support for trap message throttling as
described below. The network operator can employ message rate
throttling or trap limiting by manipulating the appropriate MIB
variables.
3.2.3.1. Trap rate throttling
Network operators may employ either of two rate control methods. In
the first method, the device ceases to send traps when the rate
exceeds the specified maximum message rate. It resumes sending traps
only if reactivated by a network management station request.
In the second method, the device resumes sending traps when the rate
falls below the specified maximum message rate.
The network operator configures the specified maximum message rate by
setting the measurement interval (in seconds), and the maximum number
of traps to be transmitted within the measurement interval. The
operator can query the operational throttling state (to determine
whether traps are enabled or blocked by throttling) of the device, as
well as query and set the administrative throttling state (to manage
the rate control method) of the device.
3.2.3.2. Limiting the trap rate
Network operators may wish to limit the number of traps sent by a
device over a specified time period. The device ceases to send traps
when the number of traps exceeds the specified threshold. It resumes
sending traps only when the measurement interval has passed.
The network operator defines the maximum number of traps he is
willing to handle and sets the measurement interval to a large number
(in hundredths of a second). For this case, the administrative
throttling state is set to stop at threshold which is the maximum
number of traps.
See "Techniques for Managing Asynchronously Generated Alerts" [17]
for further information.
3.3. Protocol Filters
The Cable Device MIB provides objects for both LLC and IP protocol
filters. The LLC protocol filter entries can be used to limit CM
forwarding to a restricted set of network-layer protocols (such as
IP, IPX, NetBIOS, and Appletalk).
The IP protocol filter entries can be used to restrict upstream or
downstream traffic based on source and destination IP addresses,
transport-layer protocols (such as TCP, UDP, and ICMP), and source
and destination TCP/UDP port numbers.
In general, a cable modem applies filters (or more properly,
classifiers) in an order appropriate to the layering model.
Specifically, the inbound MAC (or LLC) layer filters are applied
first, then the "special" filters, then the IP layer inbound filters,
then the IP layer outbound filters, then any final LLC outbound
filters. Since the cable modem does not generally do any IP
processing (other than that specified by the filters) the processing
of the IP in filters and IP out filters can usually be combined into
a single step.
***************
* LLC Filters *
***************
| | |
v | v
************ | ***************
* IP Spoof * | * SNMP Access *
************ | ***************
| | |
v v v
****************
* IP Filter In *
****************
|
v
*****************
* IP Filter Out *
*****************
|
v
***********
* LLC Out *
***********
3.3.1. Inbound LLC Filters - docsDevFilterLLCTable
The inbound LLC (or MAC or level-2) filters are contained in the
docsDevFilterLLCTable and are applied to level-2 frames entering the
cable modem from either the RF MAC interface or from one of the CPE
(ethernet or other) interfaces. These filters are used to prohibit
the processing and forwarding of certain types of level-2 traffic
that may be disruptive to the network. The filters, as currently
specified, can be set to cause the modem to either drop frames which
match at least one filter, or to process a frame which matches at
least filter. Some examples of possible configurations would be to
only permit IP (and ARP) traffic, or to drop NETBUEI traffic.
3.3.2. Special Filters
Special filters are applied after the packet is accepted from the MAC
layer by the IP module, but before any other processing is done.
They are filters that apply only to a very specific class of traffic.
3.3.2.1. IP Spoofing Filters - docsDevCpeTable
IP spoofing filters are applied to packets entering the modem from
one of the CPE interfaces and are intended to prevent a subscriber
from stealing or mis-using IP addresses that were not assigned to the
subscriber. If the filters are active (enabled), the source address
of the IP packet must match at least one IP address in this table or
it is discarded without further processing.
The table can be automatically populated where the first N different
IP addresses seen from the CPE side of the cable modem are used to
automatically populate the table. The spoofing filters are specified
in the docsDevCpeTable and the policy for automatically creating
filters in that table is controlled by docsDevCpeEnroll and
docsDevCpeMax as well as the network management agent.
3.3.2.2. SNMP Access Filters - docsDevNmAccessTable
The SNMP access filters are applied to SNMP packets entering from any
interface and destined for the cable modem. If the packets enter
from a CPE interface, the SNMP filters are applied after the IP
spoofing filters. The filters only apply to SNMPv1 or SNMPv2c
traffic, and are not consulted for SNMPv3 traffic (and need not be
implemented by a v3 only agent). SNMPv3 access control is specified
in the User Security Model MIB in [12].
3.3.3. IP Filtering - docsDevIpFilterTable
The IP Filtering table acts as a classifier table. Each row in the
table describes a template against which IP packets are compared.
The template includes source and destination addresses (and their
associated masks), upper level protocol (e.g. TCP, UDP), source and
destination port ranges, TOS and TOS mask. A row also contains
interface and traffic direction match values which have to be
considered in combination. All columns of a particular row must
match the appropriate fields in the packet, and must match the
interface and direction items for the packet to result in a match to
the packet.
When classifying a packet, the table is scanned beginning with the
lowest number filter. If the agent finds a match, it applies the
group of policies specified. If the matched filter has the continue
bit set, the agent continues the scan possibly matching additional
filters and applying additional policies. This allows the agent to
take one set of actions for the 24.0.16/255.255.255.0 group and one
set of actions for telnet packets to/from 24.0.16.30 and these sets
of actions may not be mutually exclusive.
Once a packet is matched, one of three actions happen based on the
setting of docsDevFilterIpControl in the row. The packet may be
dropped, in which case no further processing is required. The packet
may be accepted and processing of the packet continues. Lastly, the
packet may have a set of policy actions applied to it. If
docsDevFilterIpContinue is set to true, scanning of the table
continues and additional matches may result.
When a packet matches, and docsDevFilterIpControl in the filter
matched is set to 'policy', the value of docsDevFilterIpPolicyId is
used as a selector into the docsDevFilterPolicyTable. The first
level of indirection may result in zero or more actions being taken
based on the match. The docsDevFilterPolicyTable is scanned in row
order and all rows where docsDevFilterPolicyId equals
docsDevFilterIpPolicyId have the action specified by
docsDevFilterPolicyValue 'executed'. For example, a value pointing
to an entry in the docsDevFilterTosTable may result in the re-writing
of the TOS bits in the IP packet which was matched. Another
possibility may be to assign an output packet to a specific output
upstream queue. An even more complex action might be to re-write the
TOS value, assign the packet to an upstream service ID, and drop it
into a particular IPSEC tunnel.
Example:
docsDevFilterIpTable
# Index, SrcIP/Mask, DstIP/Mask,ULP, SrcPts,DstPts,Tos/Mask,
# Int/Dir, Pgroup, [continue]
# drop any netbios traffic
10, 0/0, 0/0, TCP, any, 137-139, 0/0, any/any, drop
# traffic to the proxy gets better service - other matches possible
20, 0/0, proxy/32, TCP, any,any, 0/0, cpe/in, 10, continue
# Traffic from CPE 1 gets 'Gold' service, other matches possible
30, cpe1/32, 0/0, any, any,any, 0/0, cpe/in, 20, continue
# Traffic from CPE2 to work goes, other traffic dropped
40, cpe2/32, workIPs/24, any, 0/0, cpe/in, accept
45, cpe2/32, 0/0, any, any,ayn, 0/0, cpe/in, drop
# Traffic with TOS=4 gets queued on the "silver" queue.
50, 0/0, 0/0, any, any,any, 4/255, cpe/in, 30
# Inbound "server" traffic to low numbered ports gets dropped.
60, 0/0, 0/0, TCP, any,1-1023, 0/0, cpe/out, drop
65, 0/0, 0/0, UDP, any,1-1023, 0/0, cpe/out, drop
docsDevFilterIpPolicyTable
#
# index, policy group, policy
10, 10, queueEntry.20 -- special queue for traffic to proxy
15, 20, queueEntry.15 -- Gold Service queue
20, 20, docsDevFilterTosStatus.10 -- Mark this packet with TOS 5
25, 30, queueEntry.10 -- Silver service queue
This table describes some special processing for packets originating
from either the first or second CPE device which results in their
queuing on to special upstream traffic queues and for the "gold"
service results in having the packets marked with a TOS of 5. The
10, 20, 60 and 65 entries are generic entries that would generally be
applied to all traffic to this CM. The 30, 40 and 45 entries are
specific to a particular CPE's service assignments. The ordering
here is a bit contrived, but is close to what may actually be
required by the operator to control various classes of customers.
3.3.4. Outbound LLC Filters
Lastly, any outbound LLC filters are applied to the packet just prior
to it being emitted on the appropriate interface. This MIB does not
specify any outbound LLC filters, but it is anticipated that the QOS
additions to the DOCSIS standard may include some outbound LLC
filtering requirements. If so, those filters would be applied as
described here.
4. Definitions
DOCS-CABLE-DEVICE-MIB DEFINITIONS ::= BEGIN
IMPORTS
MODULE-IDENTITY,
OBJECT-TYPE,
-- do not import BITS,
IpAddress,
Unsigned32,
Counter32,
Integer32,
zeroDotZero,
mib-2
FROM SNMPv2-SMI
RowStatus,
RowPointer,
DateAndTime,
TruthValue
FROM SNMPv2-TC
OBJECT-GROUP,
MODULE-COMPLIANCE
FROM SNMPv2-CONF
SnmpAdminString
FROM SNMP-FRAMEWORK-MIB
InterfaceIndexOrZero
FROM IF-MIB; -- RFC2233
docsDev MODULE-IDENTITY
LAST-UPDATED "9908190000Z" -- August 19, 1999
ORGANIZATION "IETF IPCDN Working Group"
CONTACT-INFO
" Michael StJohns
Postal: @Home Network
425 Broadway
Redwood City, CA 94063
U.S.A.
Phone: +1 650 569 5368
E-mail: stjohns@corp.home.net"
DESCRIPTION
"This is the MIB Module for MCNS-compliant cable modems and
cable-modem termination systems."
REVISION "9908190000Z"
DESCRIPTION
"Initial Version, published as RFC2669.
Modified by Mike StJohns to add/revise filtering, TOS
support, software version information objects."
::= { mib-2 69 }
docsDevMIBObjects OBJECT IDENTIFIER ::= { docsDev 1 }
docsDevBase OBJECT IDENTIFIER ::= { docsDevMIBObjects 1 }
--
-- For the following object, there is no concept in the
-- RFI specification corresponding to a backup CMTS. The
-- enumeration is provided here in case someone is able
-- to define such a role or device.
--
docsDevRole OBJECT-TYPE
SYNTAX INTEGER {
cm(1),
cmtsActive(2),
cmtsBackup(3)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Defines the current role of this device. cm (1) is
a Cable Modem, cmtsActive(2) is a Cable Modem Termination
System which is controlling the system of cable modems,
and cmtsBackup(3) is a CMTS which is currently connected,
but not controlling the system (not currently used).
In general, if this device is a 'cm', its role will not
change during operation or between reboots. If the
device is a 'cmts' it may change between cmtsActive and
cmtsBackup and back again during normal operation. NB:
At this time, the DOCSIS standards do not support the
concept of a backup CMTS, cmtsBackup is included for
completeness."
::= { docsDevBase 1 }
docsDevDateTime OBJECT-TYPE
SYNTAX DateAndTime
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The date and time, with optional timezone
information."
::= { docsDevBase 2 }
docsDevResetNow OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"Setting this object to true(1) causes the device to reset.
Reading this object always returns false(2)."
::= { docsDevBase 3 }
docsDevSerialNumber OBJECT-TYPE
SYNTAX SnmpAdminString
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The manufacturer's serial number for this device."
::= { docsDevBase 4 }
docsDevSTPControl OBJECT-TYPE
SYNTAX INTEGER {
stEnabled(1),
noStFilterBpdu(2),
noStPassBpdu(3)
}
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"This object controls operation of the spanning tree
protocol (as distinguished from transparent bridging).
If set to stEnabled(1) then the spanning tree protocol
is enabled, subject to bridging constraints. If
noStFilterBpdu(2), then spanning tree is not active,
and Bridge PDUs received are discarded.
If noStPassBpdu(3) then spanning tree is not active
and Bridge PDUs are transparently forwarded. Note that
a device need not implement all of these options,
but that noStFilterBpdu(2) is required."
::= { docsDevBase 5 }
--
-- The following table provides one level of security for access
-- to the device by network management stations.
-- Note that access is also constrained by the
-- community strings and any vendor-specific security.
--
docsDevNmAccessTable OBJECT-TYPE
SYNTAX SEQUENCE OF DocsDevNmAccessEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table controls access to SNMP objects by network
management stations. If the table is empty, access
to SNMP objects is unrestricted. This table exists only
on SNMPv1 or v2c agents and does not exist on SNMPv3
agents. See the conformance section for details.
Specifically, for v3 agents, the appropriate MIBs and
security models apply in lieu of this table."
::= { docsDevMIBObjects 2 }
docsDevNmAccessEntry OBJECT-TYPE
SYNTAX DocsDevNmAccessEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry describing access to SNMP objects by a
particular network management station. An entry in
this table is not readable unless the management station
has read-write permission (either implicit if the table
is empty, or explicit through an entry in this table.
Entries are ordered by docsDevNmAccessIndex. The first
matching entry (e.g. matching IP address and community
string) is used to derive access."
INDEX { docsDevNmAccessIndex }
::= { docsDevNmAccessTable 1 }
DocsDevNmAccessEntry ::= SEQUENCE {
docsDevNmAccessIndex Integer32,
docsDevNmAccessIp IpAddress,
docsDevNmAccessIpMask IpAddress,
docsDevNmAccessCommunity OCTET STRING,
docsDevNmAccessControl INTEGER,
docsDevNmAccessInterfaces OCTET STRING,
docsDevNmAccessStatus RowStatus
}
docsDevNmAccessIndex OBJECT-TYPE
SYNTAX Integer32 (1..2147483647)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Index used to order the application of access
entries."
::= { docsDevNmAccessEntry 1 }
docsDevNmAccessIp OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The IP address (or subnet) of the network management
station. The address 255.255.255.255 is defined to mean
any NMS. If traps are enabled for this entry, then the
value must be the address of a specific device."
DEFVAL { 'ffffffff'h }
::= { docsDevNmAccessEntry 2 }
docsDevNmAccessIpMask OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The IP subnet mask of the network management stations.
If traps are enabled for this entry, then the value must
be 255.255.255.255."
DEFVAL { 'ffffffff'h }
::= { docsDevNmAccessEntry 3 }
docsDevNmAccessCommunity OBJECT-TYPE
SYNTAX OCTET STRING
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The community string to be matched for access by this
entry. If set to a zero length string then any community
string will match. When read, this object SHOULD return
a zero length string."
DEFVAL { "public" }
::= { docsDevNmAccessEntry 4 }
docsDevNmAccessControl OBJECT-TYPE
SYNTAX INTEGER {
none(1),
read(2),
readWrite(3),
roWithTraps(4),
rwWithTraps(5),
trapsOnly(6)
}
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"Specifies the type of access allowed to this NMS. Setting
this object to none(1) causes the table entry to be
destroyed. Read(2) allows access by 'get' and 'get-next'
PDUs. ReadWrite(3) allows access by 'set' as well.
RoWithtraps(4), rwWithTraps(5), and trapsOnly(6)
control distribution of Trap PDUs transmitted by this
device."
DEFVAL { read }
::= { docsDevNmAccessEntry 5 }
-- The syntax of the following object was copied from RFC1493,
-- dot1dStaticAllowedToGoTo.
docsDevNmAccessInterfaces OBJECT-TYPE
SYNTAX OCTET STRING
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"Specifies the set of interfaces from which requests from
this NMS will be accepted.
Each octet within the value of this object specifies a set
of eight interfaces, with the first octet specifying ports
1 through 8, the second octet specifying interfaces 9
through 16, etc. Within each octet, the most significant
bit represents the lowest numbered interface, and the least
significant bit represents the highest numbered interface.
Thus, each interface is represented by a single bit within
the value of this object. If that bit has a value of '1'
then that interface is included in the set.
Note that entries in this table apply only to link-layer
interfaces (e.g., Ethernet and CATV MAC). Upstream and
downstream channel interfaces must not be specified."
-- DEFVAL is the bitmask corresponding to all interfaces
::= { docsDevNmAccessEntry 6 }
docsDevNmAccessStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"Controls and reflects the status of rows in this
table. Rows in this table may be created by either the
create-and-go or create-and-wait paradigms. There is no
restriction on changing values in a row of this table while
the row is active."
::= { docsDevNmAccessEntry 7 }
--
-- Procedures for using the following group are described in section
-- 3.2.1 of the DOCSIS Radio Frequence Interface Specification
--
docsDevSoftware OBJECT IDENTIFIER ::= { docsDevMIBObjects 3 }
docsDevSwServer OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The address of the TFTP server used for software upgrades.
If the TFTP server is unknown, return 0.0.0.0."
::= { docsDevSoftware 1 }
docsDevSwFilename OBJECT-TYPE
SYNTAX SnmpAdminString (SIZE (0..64))
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The file name of the software image to be loaded into this
device. Unless set via SNMP, this is the file name
specified by the provisioning server that corresponds to
the software version that is desired for this device.
If unknown, the string '(unknown)' is returned."
::= { docsDevSoftware 2 }
docsDevSwAdminStatus OBJECT-TYPE
SYNTAX INTEGER {
upgradeFromMgt(1),
allowProvisioningUpgrade(2),
ignoreProvisioningUpgrade(3)
}
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"If set to upgradeFromMgt(1), the device will initiate a
TFTP software image download using docsDevSwFilename.
After successfully receiving an image, the device will
set its state to ignoreProvisioningUpgrade(3) and reboot.
If the download process is interrupted by a reset or
power failure, the device will load the previous image
and, after re-initialization, continue to attempt loading
the image specified in docsDevSwFilename.
If set to allowProvisioningUpgrade(2), the device will
use the software version information supplied by the
provisioning server when next rebooting (this does not
cause a reboot).
When set to ignoreProvisioningUpgrade(3), the device
will disregard software image upgrade information from the
provisioning server.
Note that reading this object can return upgradeFromMgt(1).
This indicates that a software download is currently in
progress, and that the device will reboot after
successfully receiving an image.
At initial startup, this object has the default value of
allowProvisioningUpgrade(2)."
::= { docsDevSoftware 3 }
docsDevSwOperStatus OBJECT-TYPE
SYNTAX INTEGER {
inProgress(1),
completeFromProvisioning(2),
completeFromMgt(3),
failed(4),
other(5)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"InProgress(1) indicates that a TFTP download is underway,
either as a result of a version mismatch at provisioning
or as a result of a upgradeFromMgt request.
CompleteFromProvisioning(2) indicates that the last
software upgrade was a result of version mismatch at
provisioning. CompleteFromMgt(3) indicates that the last
software upgrade was a result of setting
docsDevSwAdminStatus to upgradeFromMgt.
Failed(4) indicates that the last attempted download
failed, ordinarily due to TFTP timeout."
REFERENCE
"DOCSIS Radio Frequency Interface Specification, Section
8.2, Downloading Cable Modem Operating Software."
::= { docsDevSoftware 4 }
docsDevSwCurrentVers OBJECT-TYPE
SYNTAX SnmpAdminString
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The software version currently operating in this device.
This object should be in the syntax used by the individual
vendor to identify software versions. Any CM MUST return a
string descriptive of the current software load. For a
CMTS, this object SHOULD contain either a human readable
representation of the vendor specific designation of the
software for the chassis, or of the software for the
control processor. If neither of these is applicable,
this MUST contain an empty string."
::= { docsDevSoftware 5 }
--
-- The following group describes server access and parameters used for
-- initial provisioning and bootstrapping.
--
docsDevServer OBJECT IDENTIFIER ::= { docsDevMIBObjects 4 }
docsDevServerBootState OBJECT-TYPE
SYNTAX INTEGER {
operational(1),
disabled(2),
waitingForDhcpOffer(3),
waitingForDhcpResponse(4),
waitingForTimeServer(5),
waitingForTftp(6),
refusedByCmts(7),
forwardingDenied(8),
other(9),
unknown(10)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"If operational(1), the device has completed loading and
processing of configuration parameters and the CMTS has
completed the Registration exchange.
If disabled(2) then the device was administratively
disabled, possibly by being refused network access in the
configuration file.
If waitingForDhcpOffer(3) then a DHCP Discover has been
transmitted and no offer has yet been received.
If waitingForDhcpResponse(4) then a DHCP Request has been
transmitted and no response has yet been received.
If waitingForTimeServer(5) then a Time Request has been
transmitted and no response has yet been received.
If waitingForTftp(6) then a request to the TFTP parameter
server has been made and no response received.
If refusedByCmts(7) then the Registration Request/Response
exchange with the CMTS failed.
If forwardingDenied(8) then the registration process
completed, but the network access option in the received
configuration file prohibits forwarding. "
REFERENCE
"DOCSIS Radio Frequency Interface Specification, Figure
7-1, CM Initialization Overview."
::= { docsDevServer 1 }
docsDevServerDhcp OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The IP address of the DHCP server that assigned an IP
address to this device. Returns 0.0.0.0 if DHCP was not
used for IP address assignment."
::= { docsDevServer 2 }
docsDevServerTime OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The IP address of the Time server (RFC-868). Returns
0.0.0.0 if the time server IP address is unknown."
::= { docsDevServer 3 }
docsDevServerTftp OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The IP address of the TFTP server responsible for
downloading provisioning and configuration parameters
to this device. Returns 0.0.0.0 if the TFTP server
address is unknown."
::= { docsDevServer 4 }
docsDevServerConfigFile OBJECT-TYPE
SYNTAX SnmpAdminString
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The name of the device configuration file read from the
TFTP server. Returns an empty string if the configuration
file name is unknown."
::= { docsDevServer 5 }
--
-- Event Reporting
--
docsDevEvent OBJECT IDENTIFIER ::= { docsDevMIBObjects 5 }
docsDevEvControl OBJECT-TYPE
SYNTAX INTEGER {
resetLog(1),
useDefaultReporting(2)
}
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"Setting this object to resetLog(1) empties the event log.
All data is deleted. Setting it to useDefaultReporting(2)
returns all event priorities to their factory-default
reporting. Reading this object always returns
useDefaultReporting(2)."
::= { docsDevEvent 1 }
docsDevEvSyslog OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The IP address of the Syslog server. If 0.0.0.0, syslog
transmission is inhibited."
::= { docsDevEvent 2 }
docsDevEvThrottleAdminStatus OBJECT-TYPE
SYNTAX INTEGER {
unconstrained(1),
maintainBelowThreshold(2),
stopAtThreshold(3),
inhibited(4)
}
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"Controls the transmission of traps and syslog messages
with respect to the trap pacing threshold.
unconstrained(1) causes traps and syslog messages to be
transmitted without regard to the threshold settings.
maintainBelowThreshold(2) causes trap transmission and
syslog messages to be suppressed if the number of traps
would otherwise exceed the threshold.
stopAtThreshold(3) causes trap transmission to cease
at the threshold, and not resume until directed to do so.
inhibited(4) causes all trap transmission and syslog
messages to be suppressed.
A single event is always treated as a single event for
threshold counting. That is, an event causing both a trap
and a syslog message is still treated as a single event.
Writing to this object resets the thresholding state.
At initial startup, this object has a default value of
unconstrained(1)."
::= { docsDevEvent 3 }
docsDevEvThrottleInhibited OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"If true(1), trap and syslog transmission is currently
inhibited due to thresholds and/or the current setting of
docsDevEvThrottleAdminStatus. In addition, this is set to
true(1) if transmission is inhibited due to no
syslog (docsDevEvSyslog) or trap (docsDevNmAccessEntry)
destinations having been set."
::= { docsDevEvent 4 }
docsDevEvThrottleThreshold OBJECT-TYPE
SYNTAX Unsigned32
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"Number of trap/syslog events per docsDevEvThrottleInterval
to be transmitted before throttling.
A single event is always treated as a single event for
threshold counting. That is, an event causing both a trap
and a syslog message is still treated as a single event.
At initial startup, this object returns 0."
::= { docsDevEvent 5 }
docsDevEvThrottleInterval OBJECT-TYPE
SYNTAX Integer32 (1..2147483647)
UNITS "seconds"
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The interval over which the trap threshold applies.
At initial startup, this object has a value of 1."
::= { docsDevEvent 6 }
--
-- The following table controls the reporting of the various classes of
-- events.
--
docsDevEvControlTable OBJECT-TYPE
SYNTAX SEQUENCE OF DocsDevEvControlEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table allows control of the reporting of event classes.
For each event priority, a combination of logging and
reporting mechanisms may be chosen. The mapping of event types
to priorities is vendor-dependent. Vendors may also choose to
allow the user to control that mapping through proprietary
means."
::= { docsDevEvent 7 }
docsDevEvControlEntry OBJECT-TYPE
SYNTAX DocsDevEvControlEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Allows configuration of the reporting mechanisms for a
particular event priority."
INDEX { docsDevEvPriority }
::= { docsDevEvControlTable 1 }
DocsDevEvControlEntry ::= SEQUENCE {
docsDevEvPriority INTEGER,
docsDevEvReporting BITS
}
docsDevEvPriority OBJECT-TYPE
SYNTAX INTEGER {
emergency(1),
alert(2),
critical(3),
error(4),
warning(5),
notice(6),
information(7),
debug(8)
}
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The priority level that is controlled by this
entry. These are ordered from most (emergency) to least
(debug) critical. Each event with a CM or CMTS has a
particular priority level associated with it (as defined
by the vendor). During normal operation no event more
critical than notice(6) should be generated. Events between
warning and emergency should be generated at appropriate
levels of problems (e.g. emergency when the box is about to
crash)."
::= { docsDevEvControlEntry 1 }
docsDevEvReporting OBJECT-TYPE
SYNTAX BITS {
local(0),
traps(1),
syslog(2)
}
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"Defines the action to be taken on occurrence of this
event class. Implementations may not necessarily support
all options for all event classes, but at minimum must
allow traps and syslogging to be disabled. If the
local(0) bit is set, then log to the internal log, if the
traps(1) bit is set, then generate a trap, if the
syslog(2) bit is set, then send a syslog message
(assuming the syslog address is set)."
::= { docsDevEvControlEntry 2 }
docsDevEventTable OBJECT-TYPE
SYNTAX SEQUENCE OF DocsDevEventEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Contains a log of network and device events that may be
of interest in fault isolation and troubleshooting."
::= { docsDevEvent 8 }
docsDevEventEntry OBJECT-TYPE
SYNTAX DocsDevEventEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Describes a network or device event that may be of
interest in fault isolation and troubleshooting. Multiple
sequential identical events are represented by
incrementing docsDevEvCounts and setting
docsDevEvLastTime to the current time rather than creating
multiple rows.
Entries are created with the first occurrance of an event.
docsDevEvControl can be used to clear the table.
Individual events can not be deleted."
INDEX { docsDevEvIndex }
::= { docsDevEventTable 1 }
DocsDevEventEntry ::= SEQUENCE {
docsDevEvIndex Integer32,
docsDevEvFirstTime DateAndTime,
docsDevEvLastTime DateAndTime,
docsDevEvCounts Counter32,
docsDevEvLevel INTEGER,
docsDevEvId Unsigned32,
docsDevEvText SnmpAdminString
}
docsDevEvIndex OBJECT-TYPE
SYNTAX Integer32 (1..2147483647)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Provides relative ordering of the objects in the event
log. This object will always increase except when
(a) the log is reset via docsDevEvControl,
(b) the device reboots and does not implement non-volatile
storage for this log, or (c) it reaches the value 2^31.
The next entry for all the above cases is 1."
::= { docsDevEventEntry 1 }
docsDevEvFirstTime OBJECT-TYPE
SYNTAX DateAndTime
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The time that this entry was created."
::= { docsDevEventEntry 2 }
docsDevEvLastTime OBJECT-TYPE
SYNTAX DateAndTime
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"If multiple events are reported via the same entry, the
time that the last event for this entry occurred,
otherwise this should have the same value as
docsDevEvFirstTime. "
::= { docsDevEventEntry 3 }
-- This object was renamed from docsDevEvCount to meet naming
-- requirements for Counter32
docsDevEvCounts OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of consecutive event instances reported by
this entry. This starts at 1 with the creation of this
row and increments by 1 for each subsequent duplicate
event."
::= { docsDevEventEntry 4 }
docsDevEvLevel OBJECT-TYPE
SYNTAX INTEGER {
emergency(1),