EXP-DOCS-CABLE-DEVICE-MIB

All MIBs › EXP-DOCS-CABLE-DEVICE-MIB

Organization: IETF IPCDN Working Group

Last Updated: 2000-07-07

Category: Domain: Subscriber Management, Standard: IETF

Description: Defines experimental DOCSIS cable device management objects for broadband cable modem termination systems.

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What Is EXP-DOCS-CABLE-DEVICE-MIB?

EXP-DOCS-CABLE-DEVICE-MIB is an experimental, pre-standard IETF/MCNS DOCSIS MIB covering both cable modems and cable modem termination systems (CMTS) in DOCSIS-based broadband cable networks. It exposes device role and identity, software version, reset control, date/time, spanning-tree control, and a network-management access-control table governing which IP addresses and communities may manage the device. For hardware/software status monitoring it provides docsDevDateTime for clock sanity, docsDevResetNow to trigger or observe reboots, docsDevSoftware for firmware-version tracking, and docsDevSTPControl for bridging/loop-prevention state, giving both fault-detection and configuration-audit value. As an early DOCSIS MIB, it is a direct precursor to the standardized DOCS-CABLE-DEVICE-MIB (RFC 2669) and depends on generic SNMPv2-SMI conventions. It's typically deployed by cable operators managing MCNS/DOCSIS-compliant cable modems and CMTS equipment across a hybrid fiber-coax (HFC) access network. Engineers implementing or auditing this functionality typically reference the EXP-DOCS-CABLE-DEVICE-MIB RFC/standard documentation for the authoritative specification.

IPNetwork Monitor allows you to monitor SNMP objects defined in EXP-DOCS-CABLE-DEVICE-MIB. Use the built-in SNMP Monitoring Browser to explore available variables, view their current values and descriptions, and select the objects you want to monitor. You can then create SNMP monitors, configure thresholds, and receive alerts when monitored values change.

Supported Devices

DOCSIS/MCNS-compliant cable modem
cable modem termination system (CMTS)

Monitoring Examples

An operator would poll docsDevRole to distinguish a cable modem from a CMTS, and docsDevSerialNumber together with docsDevSoftware to confirm the deployed firmware version during a rollout, while docsDevDateTime verifies the device's clock is synced. The docsDevNmAccessTable/docsDevNmAccessEntry table (docsDevNmAccessIp, docsDevNmAccessCommunity, docsDevNmAccessControl) would be checked to confirm only authorized stations can manage the device, and an unexpected entry there could indicate misconfiguration or a security exposure.

What Can Be Monitored

device role (modem vs CMTS)
software/firmware version
device date/time
reset/reboot control
network-management access control entries
spanning tree control state

Imported Objects

From IF-MIB

InterfaceIndexOrZero

From IPV6-TC

Ipv6Address

From RFC1155-SMI

experimental

From SNMP-FRAMEWORK-MIB

SnmpAdminString

From SNMP-VIEW-BASED-ACM-MIB

vacmAccessEntry

OBJECT-TYPE

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Counter32
Integer32
IpAddress
MODULE-IDENTITY
OBJECT-TYPE
Unsigned32
mib-2
zeroDotZero

From SNMPv2-TC

DateAndTime
RowPointer
RowStatus
TEXTUAL-CONVENTION
TruthValue

How to Use in IPNetwork Monitor

Example using docsDevEvCounts OID:

Select a DOCSIS/MCNS-compliant cable modem or CMT (experimental pre-standard MIB) as the target host to create a monitor — the SNMP service should be up and running on it. Click New Monitor, then check SNMP Custom on the Favorites tab, click Next, and confirm the host. On the next page, click Select... to open the built-in SNMP MIB Browser and type docsDevEvCounts into the Find box to locate it in the OID tree, selecting the specific row/instance you want to monitor since this is a table column, then select it and click OK. The number of consecutive event instances reported by this entry. On the monitor's Main parameters page you can set the target's SNMP port (default 161), credentials, polling interval, and other settings — see the SNMP Monitor help for details. On the State conditions and Alerting tabs, configure when the monitor should change state and trigger an alert; since this is a Counter32-type OID, Value bounds is the most useful condition here — trigger an alert if the counter increases sharply between polls relative to its normal baseline, since an unexpected spike often reflects a real change in traffic or activity. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
docsDev	1.3.6.1.3.83			This is the MIB Module for MCNS-compliant cable modems and cable-modem termination systems.
docsDevBase	1.3.6.1.3.83.1.1
docsDevBaseGroupV2	1.3.6.1.3.83.4.1.1			A collection of objects providing device status and control.
docsDevBasicComplianceV2	1.3.6.1.3.83.4.2.1			The compliance statement for MCNS Cable Modems and Cable Modem Termination Systems.
docsDevCompliancesV2	1.3.6.1.3.83.4.2
docsDevConformanceV2	1.3.6.1.3.83.4
docsDevCpe	1.3.6.1.3.83.1.7
INT docsDevCpeEnroll	1.3.6.1.3.83.1.7.1	INTEGER	read-write	This object controls the population of docsDevFilterCpeTable. If set to none, the filters must be set manually. If set to any, the CM wiretaps the packets originating from the ethernet and enrolls up to docsDevCpeIpMax addresses based on the source IPv4 or v6 addresses of those packets. At initial system startup, default value for this object is any(2).
docsDevCpeEntry	1.3.6.1.3.83.1.7.3.1		not-accessible	An entry in the docsDevFilterCpeTable. There is one entry for each IP CPE seen or provisioned. If docsDevCpeIpMax is set to -1, this table is ignored, otherwise: Upon receipt of an IP packet from the customer interface of the CM, the source IP address is checked against this table. If the address is in the table, packet processing continues. If the address is not in the table, but docsDevCpeEnroll is set to any and the sum of the table sizes of docsDevCpeTable and docsDevCpeV6Table is less than docsDevCpeIpMax, the address is added to the table and packet processing continues. Otherwise, the packet is dropped. The filtering actions specified by this table occur after any LLC filtering (docsDevFilterLLCTable), but prior to any IP filtering (docsDevFilterIpTable, docsDevNmAccessTable).
docsDevCpeGroupV2	1.3.6.1.3.83.4.1.7			A collection of objects used to control the number and specific values of IP addresses allowed for associated Customer Premises Equipment (CPE).
IP docsDevCpeIp	1.3.6.1.3.83.1.7.3.1.1	IpAddress	not-accessible	The IP address to which this entry applies. N.B. Neither the all zeros or all ones addresses may be used as the value of this object.
I32 docsDevCpeIpMax	1.3.6.1.3.83.1.7.2	Integer32	read-write	This object controls the maximum number of CPEs allowed to be learned behind this device. If set to zero, any number of CPEs may connect up to the maximum permitted for the device. If set to -1, no filtering is done on CPE source addresses, and no entries are made in the docsDevFilterCpeTable via learning. If an attempt is made to set this to a number greater than that permitted for the device, it is set to that maximum. At initial system startup, default value for this object is -1.
INT docsDevCpeSource	1.3.6.1.3.83.1.7.3.1.2	INTEGER	read-only	This object describes how this entry was created. If the value is manual(2), this row was created by a network management action (either configuration, or SNMP set). If set to learned(3), then it was found via looking at the source IP address of a received packet.
ROW docsDevCpeStatus	1.3.6.1.3.83.1.7.3.1.3	RowStatus	read-create	Standard object to manipulate rows. To create a row in this table, you only need to specify this object. Management stations SHOULD use the create-and-go mechanism for creating rows in this table.
docsDevCpeTable	1.3.6.1.3.83.1.7.3		not-accessible	This table lists the IP addresses seen (or permitted) as source addresses in packets originating from the customer interface on this device. In addition, this table can be provisioned with the specific addresses permitted for the CPEs via the normal row creation mechanisms. N.B. Management action can add entries in this table and in docsDevCpeIpTable past the value of docsDevCpeIpMax. docsDevCpeIpMax ONLY restricts the ability of the CM to automatically add learned addresses.
docsDevCpeV6Entry	1.3.6.1.3.83.1.7.4.1		not-accessible	An entry in the docsDevFilterCpeTable. There is one entry for each IP V6 CPE seen or provisioned. If docsDevCpeIpMax is set to -1, this table is ignored, otherwise: Upon receipt of an IPv6 packet from the customer interface of the CM, the source IP address is checked against this table. If the address is in the table, packet processing continues. If the address is not in the table, but docsDevCpeEnroll is set to any and the sum of the table sizes for docsDevCpeTable and docsDevCpeV6Tble is less than docsDevCpeIpMax, the address is added to the table and packet processing continues. Otherwise, the packet is dropped. The filtering actions specified by this table occur after any LLC filtering (docsDevFilterLLCTable), but prior to any IP filtering (docsDevFilterIpTable, docsDevNmAccessTable).
ADR docsDevCpeV6Ip	1.3.6.1.3.83.1.7.4.1.1	Ipv6Address	not-accessible	The IP address to which this entry applies. N.B. Neither the all zeros or all ones addresses may be used as values for this object.
INT docsDevCpeV6Source	1.3.6.1.3.83.1.7.4.1.2	INTEGER	read-only	This object describes how this entry was created. If the value is manual(2), this row was created by a network management action (either configuration, or SNMP set). If set to learned(3), then it was found via looking at the source IP address of a received packet.
ROW docsDevCpeV6Status	1.3.6.1.3.83.1.7.4.1.3	RowStatus	read-create	Standard object to manipulate rows. To create a row in this table, you only need to specify this object. Management stations SHOULD use the create-and-go mechanism for creating rows in this table.
docsDevCpeV6Table	1.3.6.1.3.83.1.7.4		not-accessible	This table lists the IP V6 addresses seen (or permitted) as source addresses in packets originating from the customer interface on this device. In addition, this table can be provisioned with the specific addresses permitted for the CPEs via the normal row creation mechanisms. N.B. Management action can add entries in this table and in docsDevCpeIpTable past the value of docsDevCpeIpMax. docsDevCpeIpMax ONLY restricts the ability of the CM to automatically add learned addresses. This table exactly mirrors docsDevCpeTable and applies only to IPv6 addresses.
DAT docsDevDateTime	1.3.6.1.3.83.1.1.2	DateAndTime	read-write	The current date and time, with optional timezone information. This is set at boot from the time server. If its impossible to set this from boot, this shall represent elapsed time from boot relative to the standard epoch (e.g. 1 Jan 1970 0000Z). In other words, if this agent has been up for 3 minuntes, and has been unable to set this object from the time server, this object will return 1 Jan 1970 0003Z.
docsDevDeprecatedGroup	1.3.6.1.3.83.4.1.8			These objects have been deprecated to deal with the IPv6, SNMPv3 and redefinition of the CM as a multiple CPE device. They MAY be implemented, but will be removed in the next iteration of this MIB.
INT docsDevEvControl	1.3.6.1.3.83.1.5.1	INTEGER	read-write	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).
docsDevEvControlEntry	1.3.6.1.3.83.1.5.7.1		not-accessible	Allows configuration of the reporting mechanisms for a particular event priority.
docsDevEvControlTable	1.3.6.1.3.83.1.5.7		not-accessible	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.
C32 docsDevEvCountsEx	1.3.6.1.3.83.1.5.8.1.4	Counter32	read-only	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.
docsDevEvent	1.3.6.1.3.83.1.5
docsDevEventEntry	1.3.6.1.3.83.1.5.8.1		not-accessible	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.
docsDevEventGroupV2	1.3.6.1.3.83.4.1.5			A collection of objects used to control and monitor events.
docsDevEventTable	1.3.6.1.3.83.1.5.8		not-accessible	Contains a log of network and device events that may be of interest in fault isolation and troubleshooting.
DAT docsDevEvFirstTime	1.3.6.1.3.83.1.5.8.1.2	DateAndTime	read-only	The value of docsDevDateTime at the time this entry was created.
U32 docsDevEvId	1.3.6.1.3.83.1.5.8.1.6	Unsigned32	read-only	For this product, uniquely identifies the type of event that is reported by this entry.
I32 docsDevEvIndex	1.3.6.1.3.83.1.5.8.1.1	Integer32	not-accessible	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.
DAT docsDevEvLastTime	1.3.6.1.3.83.1.5.8.1.3	DateAndTime	read-only	If multiple events are reported via the same entry, the value of docsDevDateTime that the last event for this entry occurred, otherwise this should have the same value as docsDevEvFirstTime.
INT docsDevEvLevel	1.3.6.1.3.83.1.5.8.1.5	INTEGER	read-only	The priority level of this event as defined by the vendor. These are ordered from most serious (emergency) to least serious (debug).
INT docsDevEvPriority	1.3.6.1.3.83.1.5.7.1.1	INTEGER	not-accessible	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).
BIT docsDevEvReporting	1.3.6.1.3.83.1.5.7.1.2	Bits	read-write	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).
IP docsDevEvSyslog	1.3.6.1.3.83.1.5.2	IpAddress	read-write	The IP address of the Syslog server. If 0.0.0.0, syslog transmission is either inhibited, or if docsDevEvSyslogAddress exists in this agent - may be an IPv6 device. Deprecated. See docsDevEvSyslogAddress
ADR docsDevEvSyslogAddress	1.3.6.1.3.83.1.5.9	IpV4orV6Address	read-write	The IP V4 or V6 address of the Syslog server. If the address of the server is set to any of the zero length string, the 0.0.0.0 V4 address or the 0: V6 address, syslog transmission is inhibited. By default at agent boot, this object returns the zero length string.
STR docsDevEvText	1.3.6.1.3.83.1.5.8.1.7	SnmpAdminString	read-only	Provides a human-readable description of the event, including all relevant context (interface numbers, etc.).
INT docsDevEvThrottleAdminStatus	1.3.6.1.3.83.1.5.3	INTEGER	read-write	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).
T/F docsDevEvThrottleInhibited	1.3.6.1.3.83.1.5.4	TruthValue	read-only	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.
I32 docsDevEvThrottleInterval	1.3.6.1.3.83.1.5.6	Integer32	read-write	The interval over which the trap threshold applies. At initial startup, this object has a value of 1.
U32 docsDevEvThrottleThreshold	1.3.6.1.3.83.1.5.5	Unsigned32	read-write	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.
docsDevFilter	1.3.6.1.3.83.1.6
docsDevFilterGroupV2	1.3.6.1.3.83.4.1.6			A collection of objects to specify filters at link layer and IP layer.
T/F docsDevFilterIpBroadcast	1.3.6.1.3.83.1.6.4.1.6	TruthValue	read-create	If set to true(1), the filter only applies to multicast and broadcast traffic. If set to false(2), the filter applies to all traffic.
T/F docsDevFilterIpContinue	1.3.6.1.3.83.1.6.4.1.19	TruthValue	read-create	If this value is set to true, and docsDevFilterIpControl is anything but discard (1), continue scanning and applying policies.
INT docsDevFilterIpControl	1.3.6.1.3.83.1.6.4.1.3	INTEGER	read-create	If set to discard(1), all packets matching this filter will be discarded and scanning of the remainder of the filter list will be aborted. If set to accept(2), all packets matching this filter will be accepted for further processing (e.g., bridging). If docsDevFilterIpContinue is set to true, see if there are other matches, otherwise done. If set to policy (3), execute the policy entries matched by docsDevIpFilterPolicyId in docsDevIpFilterPolicyTable. If is docsDevFilterIpContinue is set to true, continue scanning the table for other matches, otherwise done.
IP docsDevFilterIpDaddr	1.3.6.1.3.83.1.6.4.1.9	IpAddress	read-create	The destination IP address, or portion thereof, that is to be matched for this filter. The destination address is first masked (and'ed) against docsDevFilterIpDmask before being compared to this value. A value of 0 for this object and 0 for the mask matches all IP addresses.
INT docsDevFilterIpDefault	1.3.6.1.3.83.1.6.3	INTEGER	read-write	The default behavior for (bridged) packets that do not match IP filters is defined by docsDevFilterIpDefault. If set to discard(1), all packets not matching an IP filter will be discarded. If set to accept(2), all packets not matching an IP filter will be accepted for further processing (e.g., bridging). At initial system startup, this object returns accept(2).
I32 docsDevFilterIpDestPortHigh	1.3.6.1.3.83.1.6.4.1.15	Integer32	read-create	If docsDevFilterIpProtocol is udp or tcp, this is the inclusive upper bound of the transport-layer destination port range that is to be matched, otherwise it is ignored during matching.
I32 docsDevFilterIpDestPortLow	1.3.6.1.3.83.1.6.4.1.14	Integer32	read-create	If docsDevFilterIpProtocol is udp or tcp, this is the inclusive lower bound of the transport-layer destination port range that is to be matched, otherwise it is ignored during matching.
INT docsDevFilterIpDirection	1.3.6.1.3.83.1.6.4.1.5	INTEGER	read-create	Determines whether the filter is applied to inbound(1) traffic, outbound(2) traffic, or traffic in both(3) directions.
IP docsDevFilterIpDmask	1.3.6.1.3.83.1.6.4.1.10	IpAddress	read-create	A bit mask that is to be applied to the destination address prior to matching. This mask is not necessarily the same as a subnet mask, but 1's bits must be leftmost and contiguous.
docsDevFilterIpEntry	1.3.6.1.3.83.1.6.4.1		not-accessible	Describes a filter to apply to IP traffic received on a specified interface. All identity objects in this table (e.g. source and destination address/mask, protocol, source/dest port, TOS/mask, interface and direction) must match their respective fields in the packet for any given filter to match. To create an entry in this table, docsDevFilterIpIfIndex must be specified.
NUM docsDevFilterIpIfIndex	1.3.6.1.3.83.1.6.4.1.4	InterfaceIndexOrZero	read-create	The entry interface to which this filter applies. The value corresponds to ifIndex for either a CATV MAC or another interface. If the value is zero, the filter applies to all interfaces. Default value in Cable Modems is the index of the customer-side (e.g. ethernet) interface. In Cable Modem Termination Systems, this object MUST be specified to create a row in this table. DEPRECATED. If the docsDevFilterIpInterfaces object exists in this agent and row, then the value of this object is ignored for purposes of filtering AND this object need not be specified to create a row in this table.
I32 docsDevFilterIpIndex	1.3.6.1.3.83.1.6.4.1.1	Integer32	not-accessible	Index used to order the application of filters. The filter with the lowest index is always applied first.
OCT docsDevFilterIpInterfaces	1.3.6.1.3.83.1.6.4.1.21	OCTET STRING	read-create	Specifies the set of interfaces this filter applies to. Each octet within the value of this object specifies a set of eight interfaces, with the first octet spefifying interfaces 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 this set.
NUM docsDevFilterIpInterfaceSet	1.3.6.1.3.83.1.6.4.1.22	InterfaceSet	read-create	This is a convenience object for setting the value of docsDevFilterIpInterfaces. Upon read this always returns other (1). Upon a valid set, this causes docsDevFilterIpInterfaces in the same row to be set to a bit mask set consisting of the interfaces which match the class type represented by this object.
C32 docsDevFilterIpMatches	1.3.6.1.3.83.1.6.4.1.16	Counter32	read-only	Counts the number of times this filter was matched. This object is initialized to 0 at boot, or at row creation, and is reset only upon reboot.
I32 docsDevFilterIpPolicyId	1.3.6.1.3.83.1.6.4.1.20	Integer32	read-create	This object points to an entry in docsDevFilterPolicyTable. If docsDevFilterIpControl is set to policy (3), execute all matching policies in docsDevFilterPolicyTable. If no matching policy exists, treat as if docsDevFilterIpControl were set to accept (1). If this object is set to the value of 0, there is no matching policy, and docsDevFilterPolicyTable MUST NOT be consulted.
I32 docsDevFilterIpProtocol	1.3.6.1.3.83.1.6.4.1.11	Integer32	read-create	The IP protocol value that is to be matched. For example: icmp is 1, tcp is 6, udp is 17. A value of 256 matches ANY protocol.
IP docsDevFilterIpSaddr	1.3.6.1.3.83.1.6.4.1.7	IpAddress	read-create	The source IP address, or portion thereof, that is to be matched for this filter. The source address is first masked (and'ed) against docsDevFilterIpSmask before being compared to this value. A value of 0 for this object and 0 for the mask matches all IP addresses.
IP docsDevFilterIpSmask	1.3.6.1.3.83.1.6.4.1.8	IpAddress	read-create	A bit mask that is to be applied to the source address prior to matching. This mask is not necessarily the same as a subnet mask, but 1's bits must be leftmost and contiguous.
I32 docsDevFilterIpSourcePortHigh	1.3.6.1.3.83.1.6.4.1.13	Integer32	read-create	If docsDevFilterIpProtocol is udp or tcp, this is the inclusive upper bound of the transport-layer source port range that is to be matched, otherwise it is ignored during matching.
I32 docsDevFilterIpSourcePortLow	1.3.6.1.3.83.1.6.4.1.12	Integer32	read-create	If docsDevFilterIpProtocol is udp or tcp, this is the inclusive lower bound of the transport-layer source port range that is to be matched, otherwise it is ignored during matching.
ROW docsDevFilterIpStatus	1.3.6.1.3.83.1.6.4.1.2	RowStatus	read-create	Controls and reflects the status of rows in this table. Specifying only this object (with the appropriate index) on a CM is sufficient to create a filter row which matches all inbound packets on the ethernet interface, and results in the packets being discarded. docsDevFilterIpIfIndex (at least) must be specified on a CMTS to create a row. Creation of the rows may be done via either create-and-wait or create-and-go, but the filter is not applied until this object is set to (or changes to) active. There is no restriction in changing any object in a row while this object is set to active.
docsDevFilterIpTable	1.3.6.1.3.83.1.6.4		not-accessible	An ordered list of filters or classifiers to apply to IP traffic. Filter application is ordered by the filter index, rather than by a best match algorithm (Note that this implies that the filter table may have gaps in the index values). Packets which match no filters will have policy 0 in the docsDevFilterPolicyTable applied to them if it exists. Otherwise, Packets which match no filters are discarded or forwarded according to the setting of docsDevFilterIpDefault. Any IP packet can theoretically match multiple rows of this table. When considering a packet, the table is scanned in row index order (e.g. filter 10 is checked before filter 20). If the packet matches that filter (which means that it matches ALL criteria for that row), actions appropriate to docsDevFilterIpControl and docsDevFilterPolicyId are taken. If the packet was discarded processing is complete. If docsDevFilterIpContinue is set to true, the filter comparison continues with the next row in the table looking for additional matches. If the packet matches no filter in the table, the packet is accepted or dropped for further processing based on the setting of docsDevFilterIpDefault. If the packet is accepted, the actions specified by policy group 0 (e.g. the rows in docsDevFilterPolicyTable which have a value of 0 for docsDevFilterPolicyId) are taken if that policy group exists. Logically, this table is consulted twice during the processing of any IP packet - once upon its acceptance from the L2 entity, and once upon its transmission to the L2 entity. In actuality, for cable modems, IP filtering is generally the only IP processing done for transit traffic. This means that inbound and outbound filtering can generally be done at the same time with one pass through the filter table.
OCT docsDevFilterIpTos	1.3.6.1.3.83.1.6.4.1.17	OCTET STRING	read-create	This is the value to be matched to the packet's TOS (Type of Service) value (after the TOS value is AND'd with docsDevFilterIpTosMask). A value for this object of 0 and a mask of 0 matches all TOS values.
OCT docsDevFilterIpTosMask	1.3.6.1.3.83.1.6.4.1.18	OCTET STRING	read-create	The mask to be applied to the packet's TOS value before matching.
INT docsDevFilterIpType	1.3.6.1.3.83.1.6.7.1.1	INTEGER	read-create	This object controls whether this filter entry refers to IP v4 or v6 type packets. If this object is ipv4, then the IpAddress objects docsDevFilterEntry apply, otherwise if this object is ipv6 then the remaining objects in this entry apply.
docsDevFilterIpV6AuxEntry	1.3.6.1.3.83.1.6.7.1		not-accessible	This augments the existing objects in docsDevFilterIpEntry, but by default the objects in this entry have no effect on filtering as docsDevFilterIpType defaults to ipv4 upon row creation.
docsDevFilterIpV6AuxTable	1.3.6.1.3.83.1.6.7		not-accessible	This table augments docsDevIpFilterTable with objects that allow filtering of IPv6 packets. The objects in this table exactly mirror the IPv4 objects in docsDevIpFilterTable, but become active for purposes of filtering if and only if docsDevFilterIpType is set to ipv6.
ADR docsDevFilterIpV6Daddr	1.3.6.1.3.83.1.6.7.1.4	Ipv6Address	read-create	The destination address IPv6 address or portion thereof that is to be matched for this filter. The packet's source address is first masked (and'ed) aginst docsDevFilterIpV6Dmask before being compared to this value. A value of of all zeros for this object and for the mask matches all IPv6 addresses.
ADR docsDevFilterIpV6Dmask	1.3.6.1.3.83.1.6.7.1.5	Ipv6Address	read-create	A bit mask that is to be applied to the packet's destination address prior to matching. The mask is not necessarily the same as a subnet mask, the the 1's bits must be leftmost and contiguous.
ADR docsDevFilterIpV6Saddr	1.3.6.1.3.83.1.6.7.1.2	Ipv6Address	read-create	The source address IPv6 address or portion thereof that is to be matched for this filter. The packet's source address is first masked (and'ed) aginst docsDevFilterIpV6Smask before being compared to this value. A value of of all zeros for this object and for the mask matches all IPv6 addresses.
ADR docsDevFilterIpV6Smask	1.3.6.1.3.83.1.6.7.1.3	Ipv6Address	read-create	A bit mask that is to be applied to the packet's source address prior to matching. The mask is not necessarily the same as a subnet mask, the the 1's bits must be leftmost and contiguous.
docsDevFilterLLCEntry	1.3.6.1.3.83.1.6.2.1		not-accessible	Describes a single filter to apply to (bridged) LLC traffic received on a specified interface.
NUM docsDevFilterLLCIfIndex	1.3.6.1.3.83.1.6.2.1.3	InterfaceIndexOrZero	read-create	The entry interface to which this filter applies. The value corresponds to ifIndex for either a CATV MAC or another network interface. If the value is zero, the filter applies to all interfaces. In Cable Modems, the default value is the customer side interface. In Cable Modem Termination Systems, this object has to be specified to create a row in this table. DEPRECATED. If the docsDevFilterLLCInterfaces object exists in this agent and row, then the value of this object is ignored for purposes of filtering.
I32 docsDevFilterLLCIndex	1.3.6.1.3.83.1.6.2.1.1	Integer32	not-accessible	Index used for the identification of filters (note that LLC filter order is irrelevant).
OCT docsDevFilterLLCInterfaces	1.3.6.1.3.83.1.6.2.1.7	OCTET STRING	read-create	Specifies the set of interfaces this filter applies to. Each octet within the value of this object specifies a set of eight interfaces, with the first octet spefifying interfaces 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 representst 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 this set. The actual mapping of physical interfaces to interface number is implementation dependent.
NUM docsDevFilterLLCInterfaceSet	1.3.6.1.3.83.1.6.2.1.8	InterfaceSet	read-create	This is a convenience object for setting the value of docsDevFilterLLCInterfaces. Upon a valid set, this causes docsDevFilterLLCInterfaces in the same row to be set to a bit mask set consisting of the interfaces which match the class type represented by this object. Upon read, this returns 'other' by definition.
C32 docsDevFilterLLCMatches	1.3.6.1.3.83.1.6.2.1.6	Counter32	read-only	Counts the number of times this filter was matched.
I32 docsDevFilterLLCProtocol	1.3.6.1.3.83.1.6.2.1.5	Integer32	read-create	The layer three protocol for which this filter applies. The protocol value format depends on docsDevFilterLLCProtocolType. Note that for SNAP frames, etherType filtering is performed rather than DSAP=0xAA.
INT docsDevFilterLLCProtocolType	1.3.6.1.3.83.1.6.2.1.4	INTEGER	read-create	The format of the value in docsDevFilterLLCProtocol: either a two-byte Ethernet Ethertype, or a one-byte 802.2 SAP value. EtherType(1) also applies to SNAP- encapsulated frames.
ROW docsDevFilterLLCStatus	1.3.6.1.3.83.1.6.2.1.2	RowStatus	read-create	Controls and reflects the status of rows in this table. There is no restriction on changing any of the associated columns for this row while this object is set to active.
docsDevFilterLLCTable	1.3.6.1.3.83.1.6.2		not-accessible	A list of filters to apply to (bridged) LLC traffic. The filters in this table are applied to incoming traffic on the appropriate interface(s) prior to any further processing (e.g. before handing the packet off for level 3 processing, or for bridging). The specific action taken when no filter is matched is controlled by docsDevFilterLLCUnmatchedAction.
INT docsDevFilterLLCUnmatchedAction	1.3.6.1.3.83.1.6.1	INTEGER	read-write	LLC (Link Level Control) filters can be defined on an inclusive or exclusive basis: CMs can be configured to forward only packets matching a set of layer three protocols, or to drop packets matching a set of layer three protocols. Typical use of these filters is to filter out possibly harmful (given the context of a large metropolitan LAN) protocols. If set to discard(1), any L2 packet which does not match at least one filter in the docsDevFilterLLCTable will be discarded. If set to accept(2), any L2 packet which does not match at least one filter in the docsDevFilterLLCTable will be accepted for further processing (e.g., bridging). In otherwords, if the packet does not match an entry in the table it takes this action, if it does match an entry in the table it takes the opposite of this action. At initial system startup, this object returns accept(2).
docsDevFilterPolicyEntry	1.3.6.1.3.83.1.6.5.1		not-accessible	An entry in the docsDevFilterPolicyTable. Entries are created by Network Management. To create an entry, docsDevFilterPolicyId and docsDevFilterPolicyAction must be specified.
I32 docsDevFilterPolicyId	1.3.6.1.3.83.1.6.5.1.2	Integer32	read-create	Policy ID for this entry. A policy ID can apply to multiple rows of this table, all relevant policies are executed. Policy 0 (if populated) is applied to all packets which do not match any of the filters. N.B. If docsDevFilterIpPolicyId is set to 0, it DOES NOT match policy 0 of this table.
I32 docsDevFilterPolicyIndex	1.3.6.1.3.83.1.6.5.1.1	Integer32	not-accessible	Index value for the table.
NUM docsDevFilterPolicyPtr	1.3.6.1.3.83.1.6.5.1.6	RowPointer	read-create	This object points to a row in an applicable filter policy table. Currently, the only standard policy table is docsDevFilterTosTable. Per the textual convention, this object points to the first accessible object in the row. E.g. to point to a row in docsDevFilterTosTable with an index of 21, the value of this object would be the object identifier docsDevTosStatus.21. Vendors must adhere to the same convention when adding vendor specific policy table extensions. The default upon row creation is a null pointer which results in no policy action being taken.
ROW docsDevFilterPolicyStatus	1.3.6.1.3.83.1.6.5.1.5	RowStatus	read-create	Object used to create an entry in this table.
docsDevFilterPolicyTable	1.3.6.1.3.83.1.6.5		not-accessible	A Table which maps between a policy group ID and a set of policies to be applied. All rows with the same docsDevFilterPolicyId are part of the same policy group and are applied in the order in which they are in this table. docsDevFilterPolicyTable exists to allow multiple policy actions to be applied to any given classified packet. The policy actions are applied in index order For example: Index ID Type Action 1 1 TOS 1 9 5 TOS 1 12 1 IPSEC 3 This says that a packet which matches a filter with policy id 1, first has TOS policy 1 applied (which might set the TOS bits to enable a higher priority), and next has the IPSEC policy 3 applied (which may result in the packet being dumped into a secure VPN to a remote encryptor). Policy ID 0 is reserved for default actions and is applied only to packets which match no filters in docsDevIpFilterTable.
OCT docsDevFilterTosAndMask	1.3.6.1.3.83.1.6.6.1.3	OCTET STRING	read-create	This value is bitwise AND'd with the matched packet's TOS bits.
docsDevFilterTosEntry	1.3.6.1.3.83.1.6.6.1		not-accessible	A TOS policy entry.
I32 docsDevFilterTosIndex	1.3.6.1.3.83.1.6.6.1.1	Integer32	not-accessible	The unique index for this row. There are no ordering requirements for this table and any valid index may be specified.
OCT docsDevFilterTosOrMask	1.3.6.1.3.83.1.6.6.1.4	OCTET STRING	read-create	After bitwise AND'ing with the above bits, the packet's TOS bits are bitwise OR'd with these bits, and the packet's TOS BITS are set to that value.
ROW docsDevFilterTosStatus	1.3.6.1.3.83.1.6.6.1.2	RowStatus	read-create	The object used to create and delete entries in this table. A row created by specifying just this object results in a row which specifies no change to the TOS bits. A row may be created using either the create-and-go or create-and-wait paradigms. There is no restriction on the ability to change values in this row while the row is active.
docsDevFilterTosTable	1.3.6.1.3.83.1.6.6		not-accessible	Table used to describe Type of Service (TOS) bits processing. This table is an adjunct to the docsDevFilterIpTable, and the docsDevFilterPolicy table. Entries in the latter table can point to specific rows in this (and other) tables and cause specific actions to be taken. This table permits the manipulation of the value of the Type of Service bits in the IP header of the matched packet as follows: Set the tosBits of the packet to (tosBits & docsDevFilterTosAndMask) \| docsDevFilterTosOrMask This construct allows you to do a clear and set of all the TOS bits in a flexible manner.
docsDevGroupsV2	1.3.6.1.3.83.4.1
docsDevIpV6Group	1.3.6.1.3.83.4.1.9			These objects were added to deal with the filtering of IPV6 addresses. They MUST be implemented in any IPv6 aware cable modem.
docsDevMIBObjects	1.3.6.1.3.83.1
OCT docsDevNmAccessCommunity	1.3.6.1.3.83.1.2.1.4	OCTET STRING	read-create	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.
INT docsDevNmAccessControl	1.3.6.1.3.83.1.2.1.5	INTEGER	read-create	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.
docsDevNmAccessEntry	1.3.6.1.3.83.1.2.1		not-accessible	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.
docsDevNmAccessGroupV2	1.3.6.1.3.83.4.1.2			A collection of objects for controlling access to SNMP objects. Deprecated in favor of SNMPv3 and coexistence MIB.
I32 docsDevNmAccessIndex	1.3.6.1.3.83.1.2.1.1	Integer32	not-accessible	Index used to order the application of access entries.
OCT docsDevNmAccessInterfaces	1.3.6.1.3.83.1.2.1.6	OCTET STRING	read-create	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. The size of this object is the minimum required to represent all configured interfaces for this device.
IP docsDevNmAccessIp	1.3.6.1.3.83.1.2.1.2	IpAddress	read-create	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.
IP docsDevNmAccessIpMask	1.3.6.1.3.83.1.2.1.3	IpAddress	read-create	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.
ROW docsDevNmAccessStatus	1.3.6.1.3.83.1.2.1.7	RowStatus	read-create	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.
docsDevNmAccessTable	1.3.6.1.3.83.1.2		not-accessible	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. This table is deprecated. Instead, use the SNMP coexistence MIBs from RFC2576, the TARGET and NOTIFICATION MIBs from the SNMP Applications RFC, and the VACM MIBs for SNMPv1 and V2C access. If SNMP-COMMUNITY-MIB is implemented AND snmpCommunityTable is populated, then docsDevNmAccessTable and its entries are ignored for the purpose of determining v1 or v2c access. If the SNMP-COMMUNITY-MIB table has no entries, then this table has its normal access control (described above) meaning for v1 and v2c access. (Obviously, if docsDevNmAccessTable is not implemented and snmpCommunityTable is not populated, then there will be no access via SNMPv1 or v2c) To be very specific: IF the count of rows in SNMP-COMMUNITY-MIB\|snmpCommunityTable > 0 THEN resolve access using snmpCommunityTable ELSE resolve access using docsDevNmAccessTable
docsDevNotification	1.3.6.1.3.83.2
T/F docsDevResetNow	1.3.6.1.3.83.1.1.3	TruthValue	read-write	Setting this object to true(1) causes the device to reset. Reading this object always returns false(2).
INT docsDevRole	1.3.6.1.3.83.1.1.1	INTEGER	read-only	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.
STR docsDevSerialNumber	1.3.6.1.3.83.1.1.4	SnmpAdminString	read-only	The manufacturer's serial number for this device.
docsDevServer	1.3.6.1.3.83.1.4
INT docsDevServerBootState	1.3.6.1.3.83.1.4.1	INTEGER	read-only	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.
STR docsDevServerConfigFile	1.3.6.1.3.83.1.4.5	SnmpAdminString	read-only	The name of the device configuration file read from the TFTP server. Returns an empty string if the configuration file name is unknown.
ADR docsDevServerConfigTftpAddress	1.3.6.1.3.83.1.4.8	IpV4orV6Address	read-only	The IP V4 or V6 address of the TFTP server responsible for downloading provisioning and configuration parameters to this device. Returns the zero length octet string if the config server address is unknown.
IP docsDevServerDhcp	1.3.6.1.3.83.1.4.2	IpAddress	read-only	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, or if this agent was assigned an IPv6 address. Deprecated. This object is replaced by docsDevServerDhcpAddress
ADR docsDevServerDhcpAddress	1.3.6.1.3.83.1.4.6	IpV4orV6Address	read-only	The IP v4 or v6 address of the DHCP server that assigned an IP address to this device. Returns the zero length octet string if DHCP was not used for IP address assignment.
docsDevServerGroupV2	1.3.6.1.3.83.4.1.4			A collection of objects providing status about server provisioning.
IP docsDevServerTftp	1.3.6.1.3.83.1.4.4	IpAddress	read-only	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 or is an IPv6 address. Deprecated. This object is replaced by docsDevServerConfigTftpAddress.
IP docsDevServerTime	1.3.6.1.3.83.1.4.3	IpAddress	read-only	The IP address of the Time server (RFC-868). Returns 0.0.0.0 if the time server IP address is unknown, or if the time server was an IPv6 server. Deprecated. This object is replaced by docsDevServerTimeAddress.
ADR docsDevServerTimeAddress	1.3.6.1.3.83.1.4.7	IpV4orV6Address	read-only	The IP V4 or V6 address of the Time server (RFC-868). Returns the zero length octet string if the time server IP address is unknown.
docsDevSnmpCoexistGroup	1.3.6.1.3.83.4.1.10			These objects were added to retain the capability to restrict SNMP access on a per interface basis.
docsDevSoftware	1.3.6.1.3.83.1.3
docsDevSoftwareGroupV2	1.3.6.1.3.83.4.1.3			A collection of objects for controlling software downloads.
INT docsDevSTPControl	1.3.6.1.3.83.1.1.5	INTEGER	read-write	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.
INT docsDevSwAdminStatus	1.3.6.1.3.83.1.3.3	INTEGER	read-write	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).
STR docsDevSwCurrentVers	1.3.6.1.3.83.1.3.5	SnmpAdminString	read-only	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.
STR docsDevSwFilename	1.3.6.1.3.83.1.3.2	SnmpAdminString	read-write	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.
INT docsDevSwOperStatus	1.3.6.1.3.83.1.3.4	INTEGER	read-only	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.
IP docsDevSwServer	1.3.6.1.3.83.1.3.1	IpAddress	read-write	The address of the TFTP server used for software upgrades. If the TFTP server is unknown or is a V6 address, return 0.0.0.0. This entry is deprecated. See docsDevSwServerAddress for its replacement. This object will have its value modified given a valid SET to docsDevSwServerAddress.
ADR docsDevSwServerAddress	1.3.6.1.3.83.1.3.6	IpV4orV6Address	read-write	The address of the TFTP server used for software upgrades. If the TFTP server is unknown, return the zero length address string (See the TextualConvention). If docsDevSwServer is also implemented in this agent, this object is tied to it. A set of this object to an IPv4 address will result in the value of docsDevSwServer also being set to that address. If this object is set to an IPv6 address, docsDevSwServer is set to 0.0.0.0. If docsDevSwServer is set, this object is also set to that value. Note that if both are set in the same action, the order of which one sets the other is undefined - so both should be the same value.
docsDevVacmAccessExtEntry	1.3.6.1.3.83.1.8.1		not-accessible	This entry logically extends vacmAccessEntry with two objects - an interface bit set and an InterfaceSet convience object which sets the bit set.
docsDevVacmAccessExtTable	1.3.6.1.3.83.1.8		not-accessible	This table extends the VACM access table by adding a set of objects which represent the interfaces to which the referenced VACM view applies.
OCT docsDevVacmAccessInterfaces	1.3.6.1.3.83.1.8.1.1	OCTET STRING	read-create	Specifies the set of interfaces this filter applies to. Each octet within the value of this object specifies a set of eight interfaces, with the first octet spefifying interfaces 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 this set. If the bit has a value of '0' then the view represented by the related objects in vacmAccessEntry are not accessible from requests received on that inferface.
NUM docsDevVacmAccessInterfaceSet	1.3.6.1.3.83.1.8.1.2	InterfaceSet	read-create	This is a convenience object for setting the value of docsDevVacmAccessInterfaces. Upon read this always returns other (1). Upon a valid set, this causes docsDevVacmAccessInterfaces in the same row to be set to a bit mask set consisting of the interfaces which match the class type represented by this object.

RFC description

MIB module for MCNS-compliant cable modems and cable-modem termination systems.

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