CISCO-DOT11-HT-MAC-MIB
AI MIB Summary
The CISCO-DOT11-HT-MAC-MIB provides SNMP access to monitor and configure MAC-layer parameters and high-throughput 802.11n radio features, including A-MPDU/MSDU aggregation, Block-Ack states, MCS indices, MIMO configurations, and STBC settings, on Cisco WLAN Access Points. This module enables granular visibility into 802.11n-specific mechanisms such as Green Field operation, Dual CTS, and Phased Coexistence to troubleshoot throughput and reliability issues on 40MHz-capable interfaces.
This MIB is intended to be implemented on Cisco's WLAN devices that provide the wired uplink to wireless clients through the high-throughput dot11 radios compliant to the 802.11n specification.
The MIB describes the MAC layer parameters of the
802.11n compliant radio interfaces.
GLOSSARY
Access Point ( AP )
An entity that contains an 802.11 medium access control ( MAC ) and physical layer ( PHY ) interface and provides access to the distribution services via the wireless medium for associated clients.
A-MPDU
An aggregated format that consists of several MAC Protocol Data Units being aggregated and transmitted in one PHY Service Data Unit.
A-MSDU
An aggregated format that consists of several MAC Service Data Units being aggregated and transmitted in one MAC Protocol Data Unit.
Block-Ack
This refers to the acknowledgement done for all the MPDUs in an A-MDPU.
Basic Service Set ( BSS )
The IEEE 802.11 BSS of an AP comprises of the stations directly associating with the AP.
Dual CTS
Clear-To-Send control frame is sent by the receiver in response to the Request-To-Send (RTS) control frame from the sender to virtually reserve the wireless medium for data transfer.
Dual CTS mechanism is used by the AP to reserve the wireless medium for wireless devices that do not support STBC.
Green Field
A mode of operation where high-throughput 802.11n frames are transmitted without a legacy compatible part.
Mobile Node ( MN )
A roaming 802.11 wireless device in a wireless network associated with an access point. Mobile Node and client are used interchangeably.
Modulation and Coding Scheme ( MCS )
This is a value that determines the modulation, coding and number of spatial channels. Each scheme specifies the modulation technique, coding rate , number of spatial streams etc and the corresponding data rate.
Multiple Input Multiple Output ( MIMO )
This technique advocates sending and receiving data communication signals through multiple antennas. MIMO uses the multiple streams to transmit more information and recombine the signal at the receiving end. This brings more reliability and significant gain over the traditional antenna systems.
Power Save Multi-Poll ( PSMP )
A MAC control frame that schedules the transmissions and receptions of PSMP-enabled devices.
Phased Coexistence Operation ( PCO )
A BSS mode with alternating 20MHz and 40MHz phases of operation controlled by a PCO AP.
Space-Time Block Coding ( STBC )
By this technique, a wireless device transmits several copies of a data stream across a series of antennas so that the receiver can use the various received portions of the data signal to improve reliability of data transfer.
Reduced Inter-Frame Space ( RIFS )
A time interval between multiple transmissions of a single transmitter used to reduce overhead and increase network efficiency.
TU
A measurement of time equal to 1024 microseconds.
REFERENCE
[1] Part 11. Wireless LAN Medium Access Control ( MAC ) and Physical Layer ( PHY ) Specifications: Enhancements for Higher Throughput
[2] Enhanced Wireless Consortium MAC Specification, v1.24
[3] Enhanced Wireless Consortium PHY Specification, v1.27
Main OID:
ciscoDot11HtMacMIB.1.3.6.1.4.1.9.9.626
38
Objects
Active
Status
5
Dependencies
Imported Objects
Objects
38 total| Object Name |
|---|
ciscoDot11HtMacMIBThis MIB is intended to be implemented on Cisco's
WLAN devices that provide the wired uplink to wireless
clients through the high-throughput dot11 radios
compliant to the 802.11n specification.
The MIB describes the MAC layer parameters of the
802.11n compliant radio interfaces.
GLOSSARY
Access Point ( AP )
An entity that contains an 802.11 medium access
control ( MAC ) and physical layer ( PHY ) interface
and provides access to the distribution services via
the wireless medium for associated clients.
A-MPDU
An aggregated format that consists of several MAC
Protocol Data Units being aggregated and transmitted
in one PHY Service Data Unit.
A-MSDU
An aggregated format that consists of several MAC
Service Data Units being aggregated and transmitted
in one MAC Protocol Data Unit.
Block-Ack
This refers to the acknowledgement done for all the
MPDUs in an A-MDPU.
Basic Service Set ( BSS )
The IEEE 802.11 BSS of an AP comprises of the
stations directly associating with the AP.
Dual CTS
Clear-To-Send control frame is sent by the receiver
in response to the Request-To-Send (RTS) control
frame from the sender to virtually reserve the
wireless medium for data transfer.
Dual CTS mechanism is used by the AP to reserve the
wireless medium for wireless devices that do not
support STBC.
Green Field
A mode of operation where high-throughput 802.11n
frames are transmitted without a legacy compatible
part.
Mobile Node ( MN )
A roaming 802.11 wireless device in a wireless
network associated with an access point. Mobile Node
and client are used interchangeably.
Modulation and Coding Scheme ( MCS )
This is a value that determines the modulation, coding and
number of spatial channels. Each scheme specifies the
modulation technique, coding rate , number of spatial
streams etc and the corresponding data rate.
Multiple Input Multiple Output ( MIMO )
This technique advocates sending and receiving data
communication signals through multiple antennas. MIMO
uses the multiple streams to transmit more information
and recombine the signal at the receiving end. This
brings more reliability and significant gain over the
traditional antenna systems.
Power Save Multi-Poll ( PSMP )
A MAC control frame that schedules the transmissions
and receptions of PSMP-enabled devices.
Phased Coexistence Operation ( PCO )
A BSS mode with alternating 20MHz and 40MHz phases of
operation controlled by a PCO AP.
Space-Time Block Coding ( STBC )
By this technique, a wireless device transmits several
copies of a data stream across a series of antennas
so that the receiver can use the various received
portions of the data signal to improve reliability of
data transfer.
Reduced Inter-Frame Space ( RIFS )
A time interval between multiple transmissions of a
single transmitter used to reduce overhead and
increase network efficiency.
TU
A measurement of time equal to 1024 microseconds.
REFERENCE
[1] Part 11. Wireless LAN Medium Access Control ( MAC )
and Physical Layer ( PHY ) Specifications: Enhancements
for Higher Throughput
[2] Enhanced Wireless Consortium MAC Specification,
v1.24
[3] Enhanced Wireless Consortium PHY Specification,
v1.27 MODULE-IDENTITY .1.3.6.1.4.1.9.9.626 |
ciscoDot11HtMacMIBNotifs OBJECT IDENTIFIER .1.3.6.1.4.1.9.9.626.0 |
ciscoDot11HtMacMIBObjects OBJECT IDENTIFIER .1.3.6.1.4.1.9.9.626.1 |
cD11HtMacStationConfig OBJECT IDENTIFIER .1.3.6.1.4.1.9.9.626.1.1 |
cD11HtMacStationConfigTableThis table represents the MAC configuration
parameters of 802.11n interfaces.
There exists in this table, an entry corresponding
to each entry in dot11PhyOperationTable where
dot11PHYType equals 'ht'(7). SEQUENCE OF CD11HtMacStationConfigEntry .1.3.6.1.4.1.9.9.626.1.1.1 |
cD11HtMacStationConfigEntryEach Entry represents a conceptual row in
ccD11HtMacStationConfigTable and corresponds to
the MAC configuration parameters of an 802.11n
interface. CD11HtMacStationConfigEntry .1.3.6.1.4.1.9.9.626.1.1.1.1 |
cD11HtMacOperationalMCSSetThis object represents the set of MCS at which the
station may transmit data. Each bit represents an
MCS index and corresponds to a particular data rate.
Each MCS shall be within the range from 0 to 127, and
shall be supported for receiving data.
This value is reported in transmitted Beacon, Probe
Request, Probe Response, Association Request,
Association Response, Reassociation Request and
Reassociation Response frames and is used to
indicate which MCS values shall be supported by all the
devices in the BSS. When this object is zeroed, it
indicates that the other stations in the BSS shall use
legacy data rates.rw OCTET STRING .1.3.6.1.4.1.9.9.626.1.1.1.1.1 |
cD11HtMacMIMOPowerSaveThis object represents the operational power save
state of MIMO. The semantics are defined as follows.
'static' - The dot11 interface is operating in static
MIMO Power Save mode and hence, other stations
should not send MIMO packets destined to this dot11
interface.
'dynamic'- The interface switches out of the MIMO
Power Save mode to enable multiple receive chains
when an RTS is received and switches back to the
single receive-chain mode once the unicast
transmission of the MPDU is complete.
'mimo' - The dot11 interface always has multiple
receive-chains enabled and hence MIMO packets can
always be sent to this interface.ro Enumeration .1.3.6.1.4.1.9.9.626.1.1.1.1.2 |
cD11HtMacNDelayedBlockAckImplementedThis object, when 'true', indicates that the
dot11 interface supports the No-Ack option of the
Delayed Block Acknowledgement.ro TruthValue (SNMPv2-TC) .1.3.6.1.4.1.9.9.626.1.1.1.1.3 |
cD11HtMacMaxAMSDULengthThis object represents the supported maximum size of
A-MSDU.
'amsduSize3839' - This indicates a maximum size of
3839 octets.
'amsduSize7935' - This indicates a maximum size of
7935 octets.ro Enumeration .1.3.6.1.4.1.9.9.626.1.1.1.1.4 |
cD11HtMacPSMPImplementedThis object, when 'true', indicates that the dot11
interface is capable of supporting PSMP.ro TruthValue (SNMPv2-TC) .1.3.6.1.4.1.9.9.626.1.1.1.1.5 |
cD11HtMacSTBCControlFrameImplementedThis object, when 'true', indicates that the dot11
interface is capable of processing the received STBC
control frames.ro TruthValue (SNMPv2-TC) .1.3.6.1.4.1.9.9.626.1.1.1.1.6 |
cD11HtMacLsigTxOpProtectImplementedThis object, when 'true', indicates that the dot11
interface is capable of supporting L-SIG TXOP
Protection option.ro TruthValue (SNMPv2-TC) .1.3.6.1.4.1.9.9.626.1.1.1.1.7 |
cD11HtMacMaxRxAMPDUFactorThis object is used to compute the maximum length
of the A-MPDU the STA can receive, as follows.
maximum length of A-MPDU in octets =
2 ^ ( 13 + cD11HtMacMaxRxAMPDUFactor ) -1.ro INTEGER .1.3.6.1.4.1.9.9.626.1.1.1.1.8 |
cD11HtMacMPDUDensityThis object represents the minimum time between the
start of adjacent MPDUs within an A-MPDU. This time
is measured at the PHY service access-point; the
number of bytes between the start of two consecutive
MPDUs in A-MPDU shall be equal or greater than
(MPDU-density*PHY-bit-rate)/8. The encoding of the
minimum time to this object is as follows.
'noTimeRestriction' - no time restriction between the
start of adjacent MPDUs.
'oneEighth' - 1/8 microseconds
'oneFourth' - 1/4 microseconds
'half' - 1/2 microseconds
'one' - 1 microsecond
'two' - 2 microseconds
'four' - 4 microseconds
'eight' - 8 microseconds.ro Enumeration .1.3.6.1.4.1.9.9.626.1.1.1.1.9 |
cD11HtMacPCOImplementedThis object, when 'true', indicates that the dot11
interface is capable of supporting Phased coexistence
operation.ro TruthValue (SNMPv2-TC) .1.3.6.1.4.1.9.9.626.1.1.1.1.10 |
cD11HtMacTransitionTimeThis object indicates that the minimum transition
time within which the STA can switch between 20 MHz
channel width and 40 MHz channel width with a high
probability.ro Enumeration .1.3.6.1.4.1.9.9.626.1.1.1.1.11 |
cD11HtMacMCSFeedbackImplementedThis object indicates the MCS feedback
capability supported on this 802.11n interface.
The semantics are as follows.
'none' - The station does not provide MCS feedback
through this interface.
'unsolicited' - The station provides only
unsolicited MCS feedback.
'both' - The station provides both solicited as
well as unsolicited MCS feedback.ro Enumeration .1.3.6.1.4.1.9.9.626.1.1.1.1.12 |
cD11HtMacAMSDUEnableThis object represents whether this 802.11n radio
can transmit / receive A-MSDUs.rw TruthValue (SNMPv2-TC) .1.3.6.1.4.1.9.9.626.1.1.1.1.13 |
cD11HtMacAMPDUEnableThis object represents whether this 802.11n radio
can transmit / receive A-MPDUs.rw TruthValue (SNMPv2-TC) .1.3.6.1.4.1.9.9.626.1.1.1.1.14 |
cD11HtMacOperations OBJECT IDENTIFIER .1.3.6.1.4.1.9.9.626.1.2 |
cD11HtMacOperationTableThis table represents the operational parameters
of 802.11n interfaces.
Entries in this table are created automatically
by the agent corresponding to each 802.11n
interface.
There exists in this table, an entry corresponding
to each entry in dot11PhyOperationTable where
dot11PHYType equals 'ht'(7). SEQUENCE OF CD11HtMacOperationEntry .1.3.6.1.4.1.9.9.626.1.2.1 |
cD11HtMacOperationEntryA conceptual row in cD11HtMacOperationTable and
represents the operational parameters of an 802.11n
interface. CD11HtMacOperationEntry .1.3.6.1.4.1.9.9.626.1.2.1.1 |
cD11HtMacOperatingModeThis object represents the level of protection to be
provided to the data transmissions of 802.11n radios.
The semantics are as follows.
'pureHt' - No protection will be provided to the
high throughput tranmissions in the BSS started on
this interface. This indicates that there will
only be those high-throughput devices associated to
the AP in the respective BSS.
'optionalProtection' - Protection is optional
considering that there could be legacy devices in the
control and extension channels.
'mandatoryFortyProtection' - Protection is mandatory
for all the 40MHz channel transmissions.
'mandatoryAllProtection' - There are legacy devices
in the BSS and hence all high throughput transmissions
are mandatorily protected.rw Enumeration .1.3.6.1.4.1.9.9.626.1.2.1.1.1 |
cD11HtMacRIFSModeThis object, when set to 'true', indicates that RIFS mode
is allowed in the BSS.rw TruthValue (SNMPv2-TC) .1.3.6.1.4.1.9.9.626.1.2.1.1.2 |
cD11HtMacPSMPControlledAccessThis object, when set to 'true', indicates that the AP
accepts associations only from PSMP-enabled clients.rw TruthValue (SNMPv2-TC) .1.3.6.1.4.1.9.9.626.1.2.1.1.3 |
cD11HtMacServiceIntervalGranularityThis object represents the service interval
granularity to be used for scheduled PSMP. The value
of the granularity is given by
(cD11HtMacServiceIntervalGranularity+1)*5
milliseconds.rw INTEGER .1.3.6.1.4.1.9.9.626.1.2.1.1.4 |
cD11HtMacDualCTSProtectionThis object, when set to 'true', indicates that the AP
uses dual CTS protection to protect the regular and the
STBC transmissions.rw TruthValue (SNMPv2-TC) .1.3.6.1.4.1.9.9.626.1.2.1.1.5 |
cD11HtMacLSigTxOpFullProtectionEnabledThis object, when set to 'true', indicates that the
LSIG-TXOP Protection is currently enabled on the
AP.rw TruthValue (SNMPv2-TC) .1.3.6.1.4.1.9.9.626.1.2.1.1.6 |
cD11HtMacNonGFEntitiesPresentThis object, when set to 'true', indicates that
Non-GreenField clients are present in the BSS.rw TruthValue (SNMPv2-TC) .1.3.6.1.4.1.9.9.626.1.2.1.1.7 |
cD11HtMacPCOActivatedThis object, when set to 'true', indicates that the
PCO is activated.rw TruthValue (SNMPv2-TC) .1.3.6.1.4.1.9.9.626.1.2.1.1.8 |
cD11HtMacPCO20MaxDurationThis object represents the maximum duration of
20 MHz phase in TU under PCO operation. The value of
this object shall be equal to or larger than
cD11HtMacPCO20MinDuration.rw INTEGER .1.3.6.1.4.1.9.9.626.1.2.1.1.9 |
cD11HtMacPCO40MaxDurationThis object represents the maximum duration
of 40 MHz phase in TU under PCO operation. The
value of this object shall be equal to or larger
than cD11HtMacPCO40MinDuration.rw INTEGER .1.3.6.1.4.1.9.9.626.1.2.1.1.10 |
cD11HtMacPCO20MinDurationThis object represents the minimum duration of
20 MHz phase in TU under PCO operation.rw INTEGER .1.3.6.1.4.1.9.9.626.1.2.1.1.11 |
cD11HtMacPCO40MinDurationThis object represents the minimum duration of
40 MHz phase in TU under PCO operation.rw INTEGER .1.3.6.1.4.1.9.9.626.1.2.1.1.12 |
ciscoDot11HtMacMIBConform OBJECT IDENTIFIER .1.3.6.1.4.1.9.9.626.2 |
ciscoDot11HtMacMIBCompliances OBJECT IDENTIFIER .1.3.6.1.4.1.9.9.626.2.1 |
ciscoDot11HtMacMIBGroups OBJECT IDENTIFIER .1.3.6.1.4.1.9.9.626.2.2 |