RFC 5416
Control and Provisioning of Wireless Access Points (CAPWAP) Protocol Binding for IEEE 802.11
3. IEEE 802.11 Specific CAPWAP Control Messages
This section defines CAPWAP Control messages that are specific to the IEEE 802.11 binding. Two messages are defined: IEEE 802.11 WLAN Configuration Request and IEEE 802.11 WLAN Configuration Response. See Section 4.5 in [RFC5415] for CAPWAP Control message definitions and the derivation of the Message Type value from the IANA Enterprise number.
The valid message types for IEEE 802.11-specific control messages are
listed below. The IANA Enterprise number used with these messages is
13277.
CAPWAP Control Message Message Type
Value
IEEE 802.11 WLAN Configuration Request 3398913
IEEE 802.11 WLAN Configuration Response 3398914
3.1. IEEE 802.11 WLAN Configuration Request
The IEEE 802.11 WLAN Configuration Request is sent by the AC to the
WTP in order to change services provided by the WTP. This control
message is used to either create, update, or delete a WLAN on the
WTP.
The IEEE 802.11 WLAN Configuration Request is sent as a result of
either some manual administrative process (e.g., deleting a WLAN), or
automatically to create a WLAN on a WTP. When sent automatically to
create a WLAN, this control message is sent after the CAPWAP
Configuration Update Response message (see Section 8.5 in [RFC5415])
has been received by the AC.
Upon receiving this control message, the WTP will modify the
necessary services and transmit an IEEE 802.11 WLAN Configuration
Response.
A WTP MAY provide service for more than one WLAN; therefore, every
WLAN is identified through a numerical index. For instance, a WTP
that is capable of supporting up to 16 Service Set Identifiers
(SSIDs), could accept up to 16 IEEE 802.11 WLAN Configuration Request
messages that include the Add WLAN message element.
Since the index is the primary identifier for a WLAN, an AC MAY
attempt to ensure that the same WLAN is identified through the same
index number on all of its WTPs. An AC that does not follow this
approach MUST find some other means of maintaining a WLAN-Identifier-
to-SSID mapping table.
The following message elements MAY be included in the IEEE 802.11
WLAN Configuration Request message. Only one message element MUST be
present.
o IEEE 802.11 Add WLAN, see Section 6.1
o IEEE 802.11 Delete WLAN, see Section 6.4
o IEEE 802.11 Update WLAN, see Section 6.21 The following message element MAY be present. o IEEE 802.11 Information Element, see Section 6.6 o Vendor-Specific Payload, see [RFC5415]3.2. IEEE 802.11 WLAN Configuration Response
The IEEE 802.11 WLAN Configuration Response message is sent by the WTP to the AC. It is used to acknowledge receipt of an IEEE 802.11 WLAN Configuration Request message, and to indicate that the requested configuration was successfully applied or that an error related to the processing of the IEEE 802.11 WLAN Configuration Request message occurred on the WTP. The following message element MUST be included in the IEEE 802.11 WLAN Configuration Response message. o Result Code, see Section 4.6.34 in [RFC5415] The following message element MAY be included in the IEEE 802.11 WLAN Configuration Response message. o IEEE 802.11 Assigned WTP BSSID, see Section 6.3 o Vendor-Specific Payload, see [RFC5415]4. CAPWAP Data Message Bindings
This section describes the CAPWAP data message bindings to support transport of IEEE 802.11 frames. Payload encapsulation: The CAPWAP protocol defines the CAPWAP data message, which is used to encapsulate a wireless payload. For IEEE 802.11, the IEEE 802.11 header and payload are encapsulated (excluding the IEEE 802.11 FCS checksum). The IEEE 802.11 FCS checksum is handled by the WTP. This allows the WTP to validate an IEEE 802.11 frame prior to sending it to the AC. Similarly, when an AC wishes to transmit a frame to a station, the WTP computes and adds the FCS checksum. Optional Wireless Specific Information: This optional CAPWAP header field (see Section 4.3 in [RFC5415]) is only used with CAPWAP data messages, and it serves two purposes, depending upon the direction of the message. For messages from the WTP to the AC, the field uses the format described in the "IEEE 802.11 Frame Info" field
(see below). However, for messages sent by the AC to the WTP, the
format used is described in the "Destination WLANs" field (also
defined below).
Note that in both cases, the two optional headers fit in the
"Data" field of the Wireless Specific Information header.
IEEE 802.11 Frame Info: When an IEEE 802.11 frame is received from a
station over the air, it is encapsulated and this field is used to
include radio and PHY-specific information associated with the
frame.
The IEEE 802.11 Frame Info field has the following format:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| RSSI | SNR | Data Rate |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
RSSI: Received Signal Strength Indication (RSSI) is a signed,
8-bit value. It is the received signal strength indication, in
dBm.
SNR: SNR is a signed, 8-bit value. It is the signal-to-noise
ratio of the received IEEE 802.11 frame, in dB.
Data Rate: The data rate field is a 16-bit unsigned value. The
data rate field is a 16-bit unsigned value expressing the data
rate of the packets received by the WTP in units of 0.1 Mbps.
For instance, a packet received at 5.5 Mbps would be set to 55,
while 11 Mbps would be set to 110.
Destination WLANs: The Destination WLANs field is used to specify
the target WLANs for a given frame, and is only used with
broadcast and multicast frames. This field allows the AC to
transmit a single broadcast or multicast frame to the WTP and
allows the WTP to perform the necessary frame replication. The
field uses the following format:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| WLAN ID bitmap | Reserved |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
WLAN ID bitmap: This bit field indicates the WLAN ID (see
Section 6.1) on which the WTP will transmit the included frame.
For instance, if a multicast packet is to be transmitted on
WLANs 1 and 3, the bits for WLAN 1 and 3 of this field would be
enabled. WLAN 1 is represented by bit 15 in the figure above,
or the least significant bit, while WLAN 16 would be
represented by bit zero (0), or the most significant bit, in
the figure. This field is to be set to all zeroes for unicast
packets and is unused if the WTP is not providing IEEE 802.11
encryption.
Reserved: All implementations complying with this protocol MUST
set to zero any bits that are reserved in the version of the
protocol supported by that implementation. Receivers MUST
ignore all bits not defined for the version of the protocol
they support.
5. CAPWAP Control Message Bindings
This section describes the IEEE 802.11-specific message elements
included in CAPWAP Control Messages.
5.1. Discovery Request Message
The following IEEE 802.11-specific message element MUST be included
in the CAPWAP Discovery Request Message.
o IEEE 802.11 WTP Radio Information, see Section 6.25. An IEEE
802.11 WTP Radio Information message element MUST be present for
every radio in the WTP.
5.2. Discovery Response Message
The following IEEE 802.11-specific message element MUST be included
in the CAPWAP Discovery Response Message.
o IEEE 802.11 WTP Radio Information, see Section 6.25. An IEEE
802.11 WTP Radio Information message element MUST be present for
every radio in the WTP.
5.3. Primary Discovery Request Message
The following IEEE 802.11 specific message element MUST be included
in the CAPWAP Primary Discovery Request message.
o IEEE 802.11 WTP Radio Information, see Section 6.25. An IEEE
802.11 WTP Radio Information message element MUST be present for
every radio in the WTP.
5.4. Primary Discovery Response Message
The following IEEE 802.11-specific message element MUST be included in the CAPWAP Primary Discovery Response message. o IEEE 802.11 WTP Radio Information, see Section 6.25. An IEEE 802.11 WTP Radio Information message element MUST be present for every radio in the WTP.5.5. Join Request Message
The following IEEE 802.11-specific message element MUST be included in the CAPWAP Join Request message. o IEEE 802.11 WTP Radio Information, see Section 6.25. An IEEE 802.11 WTP Radio Information message element MUST be present for every radio in the WTP.5.6. Join Response Message
The following IEEE 802.11-specific message element MUST be included in the CAPWAP Join Response message. o IEEE 802.11 WTP Radio Information, see Section 6.25. An IEEE 802.11 WTP Radio Information message element MUST be present for every radio in the WTP.5.7. Configuration Status Request Message
The following IEEE 802.11-specific message elements MAY be included in the CAPWAP Configuration Status Request message. More than one of each message element listed MAY be included. o IEEE 802.11 Antenna, see Section 6.2 o IEEE 802.11 Direct Sequence Control, see Section 6.5 o IEEE 802.11 MAC Operation, see Section 6.7 o IEEE 802.11 Multi-Domain Capability, see Section 6.9 o IEEE 802.11 Orthogonal Frequency Division Multiplexing (OFDM) Control, see Section 6.10 o IEEE 802.11 Supported Rates, see Section 6.17 o IEEE 802.11 Tx Power, see Section 6.18
o IEEE 802.11 TX Power Level, see Section 6.19 o IEEE 802.11 WTP Radio Configuration, see Section 6.23 o IEEE 802.11 WTP Radio Information, see Section 6.25. An IEEE 802.11 WTP Radio Information message element MUST be present for every radio in the WTP.5.8. Configuration Status Response Message
The following IEEE 802.11 specific message elements MAY be included in the CAPWAP Configuration Status Response Message. More than one of each message element listed MAY be included. o IEEE 802.11 Antenna, see Section 6.2 o IEEE 802.11 Direct Sequence Control, see Section 6.5 o IEEE 802.11 MAC Operation, see Section 6.7 o IEEE 802.11 Multi-Domain Capability, see Section 6.9 o IEEE 802.11 OFDM Control, see Section 6.10 o IEEE 802.11 Rate Set, see Section 6.11 o IEEE 802.11 Supported Rates, see Section 6.17 o IEEE 802.11 Tx Power, see Section 6.18 o IEEE 802.11 WTP Quality of Service, see Section 6.22 o IEEE 802.11 WTP Radio Configuration, see Section 6.235.9. Configuration Update Request Message
The following IEEE 802.11-specific message elements MAY be included in the CAPWAP Configuration Update Request message. More than one of each message element listed MAY be included. o IEEE 802.11 Antenna, see Section 6.2 o IEEE 802.11 Direct Sequence Control, see Section 6.5 o IEEE 802.11 MAC Operation, see Section 6.7 o IEEE 802.11 Multi-Domain Capability, see Section 6.9
o IEEE 802.11 OFDM Control, see Section 6.10 o IEEE 802.11 Rate Set, see Section 6.11 o IEEE 802.11 RSNA Error Report from Station, see Section 6.12 o IEEE 802.11 Tx Power, see Section 6.18 o IEEE 802.11 WTP Quality of Service, see Section 6.22 o IEEE 802.11 WTP Radio Configuration, see Section 6.235.10. Station Configuration Request
The following IEEE 802.11-specific message elements MAY be included in the CAPWAP Station Configuration Request message. More than one of each message element listed MAY be included. o IEEE 802.11 Station, see Section 6.13 o IEEE 802.11 Station Session Key, see Section 6.15 o IEEE 802.11 Station QoS Profile, see Section 6.14 o IEEE 802.11 Update Station Qos, see Section 6.205.11. Change State Event Request
The following IEEE 802.11-specific message element MAY be included in the CAPWAP Station Configuration Request message. o IEEE 802.11 WTP Radio Fail Alarm Indication, see Section 6.245.12. WTP Event Request
The following IEEE 802.11-specific message elements MAY be included in the CAPWAP WTP Event Request message. More than one of each message element listed MAY be included. o IEEE 802.11 MIC Countermeasures, see Section 6.8 o IEEE 802.11 RSNA Error Report from Station, see Section 6.12 o IEEE 802.11 Statistics, see Section 6.16
6. IEEE 802.11 Message Element Definitions
The following IEEE 802.11-specific message elements are defined in this section. IEEE 802.11 Message Element Type Value IEEE 802.11 Add WLAN 1024 IEEE 802.11 Antenna 1025 IEEE 802.11 Assigned WTP BSSID 1026 IEEE 802.11 Delete WLAN 1027 IEEE 802.11 Direct Sequence Control 1028 IEEE 802.11 Information Element 1029 IEEE 802.11 MAC Operation 1030 IEEE 802.11 MIC Countermeasures 1031 IEEE 802.11 Multi-Domain Capability 1032 IEEE 802.11 OFDM Control 1033 IEEE 802.11 Rate Set 1034 IEEE 802.11 RSNA Error Report From Station 1035 IEEE 802.11 Station 1036 IEEE 802.11 Station QoS Profile 1037 IEEE 802.11 Station Session Key 1038 IEEE 802.11 Statistics 1039 IEEE 802.11 Supported Rates 1040 IEEE 802.11 Tx Power 1041 IEEE 802.11 Tx Power Level 1042 IEEE 802.11 Update Station QoS 1043 IEEE 802.11 Update WLAN 1044 IEEE 802.11 WTP Quality of Service 1045 IEEE 802.11 WTP Radio Configuration 1046 IEEE 802.11 WTP Radio Fail Alarm Indication 1047 IEEE 802.11 WTP Radio Information 1048 Figure 8: IEEE 802.11 Binding Message Elements6.1. IEEE 802.11 Add WLAN
The IEEE 802.11 Add WLAN message element is used by the AC to define a WLAN on the WTP. The inclusion of this message element MUST also include IEEE 802.11 Information Element message elements, containing the following IEEE 802.11 IEs: Power Constraint information element EDCA Parameter Set information element QoS Capability information element
WPA information element [WPA] RSN information element WMM information element [WMM] These IEEE 802.11 Information Elements are stored by the WTP and included in any Probe Responses and Beacons generated, as specified in the IEEE 802.11 standard [IEEE.802-11.2007]. If present, the RSN Information Element is sent with the IEEE 802.11 Add WLAN message element to instruct the WTP on the usage of the Key field. If cryptographic services are provided at the WTP, the WTP MUST observe the algorithm dictated in the Group Cipher Suite field of the RSN Information Element sent by the AC. The RSN Information Element is used to communicate any supported algorithm, including WEP, Temporal Key Integrity Protocol (TKIP) and AES-CCMP. In the case of static WEP keys, the RSN Information Element is still used to indicate the cryptographic algorithm even though no key exchange occurred. An AC MAY include additional Information Elements as desired. The message element uses the following format: 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Radio ID | WLAN ID | Capability | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Key Index | Key Status | Key Length | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Key... | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Group TSC | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Group TSC | QoS | Auth Type | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | MAC Mode | Tunnel Mode | Suppress SSID | SSID ... +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Type: 1024 for IEEE 802.11 Add WLAN Length: >= 20 Radio ID: An 8-bit value representing the radio, whose value is between one (1) and 31.
WLAN ID: An 8-bit value specifying the WLAN Identifier. The value
MUST be between one (1) and 16.
Capability: A 16-bit value containing the Capability information
field to be advertised by the WTP in the Probe Request and Beacon
frames. Each bit of the Capability field represents a different
WTP capability, which are described in detail in
[IEEE.802-11.2007]. The format of the field is:
0 1
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|E|I|C|F|P|S|B|A|M|Q|T|D|V|O|K|L|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
E (ESS): The AC MUST set the Extended Service Set (ESS) subfield
to 1.
I (IBSS): The AC MUST set the Independent Basic Service Set
(IBSS) subfield to 0.
C (CF-Pollable): The AC sets the Contention Free Pollable (CF-
Pollable) subfield based on the table found in
[IEEE.802-11.2007].
F (CF-Poll Request): The AC sets the CF-Poll Request subfield
based on the table found in [IEEE.802-11.2007].
P (Privacy): The AC sets the Privacy subfield based on the
confidentiality requirements of the WLAN, as defined in
[IEEE.802-11.2007].
S (Short Preamble): The AC sets the Short Preamble subfield
based on whether the use of short preambles is permitted on the
WLAN, as defined in [IEEE.802-11.2007].
B (PBCC): The AC sets the Packet Binary Convolutional Code
(PBCC) modulation option subfield based on whether the use of
PBCC is permitted on the WLAN, as defined in [IEEE.802-11.2007].
A (Channel Agility): The AC sets the Channel Agility subfield
based on whether the WTP is capable of supporting the High Rate
Direct Sequence Spread Spectrum (HR/DSSS), as defined in
[IEEE.802-11.2007].
M (Spectrum Management): The AC sets the Spectrum Management
subfield according to the value of the
dot11SpectrumManagementRequired MIB variable, as defined in
[IEEE.802-11.2007].
Q (QoS): The AC sets the Quality of Service (QoS) subfield based
on the table found in [IEEE.802-11.2007].
T (Short Slot Time): The AC sets the Short Slot Time subfield
according to the value of the WTP's currently used slot time
value, as defined in [IEEE.802-11.2007].
D (APSD): The AC sets the Automatic Power Save Delivery (APSD)
subfield according to the value of the
dot11APSDOptionImplemented Management Information Base (MIB)
variable, as defined in [IEEE.802-11.2007].
V (Reserved): The AC sets the Reserved subfield to zero, as
defined in [IEEE.802-11.2007].
O (DSSS-OFDM): The AC sets the DSSS-OFDM subfield to indicate
the use of Direct Sequence Spread Spectrum with Orthogonal
Frequency Division Multiplexing (DSSS-OFDM), as defined in
[IEEE.802-11.2007].
K (Delayed Block ACK): The AC sets the Delayed Block ACK
subfield according to the value of the
dot11DelayedBlockAckOptionImplemented MIB variable, as defined
in [IEEE.802-11.2007].
L (Immediate Block ACK): The AC sets the Delayed Block ACK
subfield according to the value of the
dot11ImmediateBlockAckOptionImplemented MIB variable, as defined
in [IEEE.802-11.2007].
Key-Index: The Key Index associated with the key.
Key Status: A 1-byte value that specifies the state and usage of
the key that has been included. Note this field is ignored if the
Key Length field is set to zero (0). The following values
describe the key usage and its status:
0 - A value of zero, with the inclusion of the RSN Information
Element means that the WLAN uses per-station encryption keys,
and therefore the key in the 'Key' field is only used for
multicast traffic.
1 - When set to one, the WLAN employs a shared Wired Equivalent
Privacy (WEP) key, also known as a static WEP key, and uses
the encryption key for both unicast and multicast traffic for
all stations.
2 - The value of 2 indicates that the AC will begin rekeying the
GTK with the STA's in the BSS. It is only valid when IEEE
802.11 is enabled as the security policy for the BSS.
3 - The value of 3 indicates that the AC has completed rekeying
the GTK and broadcast packets no longer need to be duplicated
and transmitted with both GTK's.
Key Length: A 16-bit value representing the length of the Key
field.
Key: A Session Key, whose length is known via the Key Length field,
used to provide data privacy. For encryption schemes that employ
a separate encryption key for unicast and multicast traffic, the
key included here only applies to multicast frames, and the cipher
suite is specified in an accompanied RSN Information Element. In
these scenarios, the key and cipher information is communicated
via the Add Station message element, see Section 4.6.8 in
[RFC5415] and the IEEE 802.11 Station Session Key message element,
see Section 6.15. When used with WEP, the key field includes the
broadcast key. When used with CCMP, the Key field includes the
128-bit Group Temporal Key. When used with TKIP, the Key field
includes the 256-bit Group Temporal Key (which consists of a 128-
bit key used as input for TKIP key mixing, and two 64-bit keys
used for Michael).
Group TSC: A 48-bit value containing the Transmit Sequence Counter
(TSC) for the updated group key. The WTP will set the TSC for
broadcast/multicast frames to this value for the updated group
key.
QoS: An 8-bit value specifying the default QoS policy for the WTP
to apply to network traffic received for a non-WMM enabled STA.
The following enumerated values are supported:
0 - Best Effort
1 - Video
2 - Voice
3 - Background
Auth Type: An 8-bit value specifying the supported authentication
type.
The following enumerated values are supported:
0 - Open System
1 - WEP Shared Key
MAC Mode: This field specifies whether the WTP should support the
WLAN in Local or Split MAC mode. Note that the AC MUST NOT
request a mode of operation that was not advertised by the WTP
during the discovery process (see Section 4.6.43 in [RFC5415]).
The following enumerated values are supported:
0 - Local MAC: Service for the WLAN is to be provided in Local
MAC mode.
1 - Split MAC: Service for the WLAN is to be provided in Split
MAC mode.
Tunnel Mode: This field specifies the frame tunneling type to be
used for 802.11 data frames from all stations associated with the
WLAN. The AC MUST NOT request a mode of operation that was not
advertised by the WTP during the discovery process (see Section
4.6.42 in [RFC5415]). All IEEE 802.11 management frames MUST be
tunneled using 802.11 Tunnel mode. The following enumerated
values are supported:
0 - Local Bridging: All user traffic is to be locally bridged.
1 - 802.3 Tunnel: All user traffic is to be tunneled to the AC
in 802.3 format (see Section 4.4.2 in [RFC5415]). Note that
this option MUST NOT be selected with Split MAC mode.
2 - 802.11 Tunnel: All user traffic is to be tunneled to the AC
in 802.11 format.
Suppress SSID: A boolean indicating whether the SSID is to be
advertised by the WTP. A value of zero suppresses the SSID in the
802.11 Beacon and Probe Response frames, while a value of one will
cause the WTP to populate the field.
SSID: The SSID attribute is the service set identifier that will be
advertised by the WTP for this WLAN. The SSID field contains any
ASCII character and MUST NOT exceed 32 octets in length, as
defined in [IEEE.802-11.2007].
6.2. IEEE 802.11 Antenna
The IEEE 802.11 Antenna message element is communicated by the WTP to
the AC to provide information on the antennas available. The AC MAY
use this element to reconfigure the WTP's antennas. The message
element contains the following fields:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Radio ID | Diversity | Combiner | Antenna Cnt |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Antenna Selection...
+-+-+-+-+-+-+-+-+
Type: 1025 for IEEE 802.11 Antenna
Length: >= 5
Radio ID: An 8-bit value representing the radio to configure, whose
value is between one (1) and 31.
Diversity: An 8-bit value specifying whether the antenna is to
provide receiver diversity. The value of this field is the same
as the IEEE 802.11 dot11DiversitySelectionRx MIB element, see
[IEEE.802-11.2007]. The following enumerated values are
supported:
0 - Disabled
1 - Enabled (may only be true if the antenna can be used as a
receiving antenna)
Combiner: An 8-bit value specifying the combiner selection. The
following enumerated values are supported:
1 - Sectorized (Left)
2 - Sectorized (Right)
3 - Omni
4 - Multiple Input/Multiple Output (MIMO)
Antenna Count: An 8-bit value specifying the number of Antenna
Selection fields. This value SHOULD be the same as the one found
in the IEEE 802.11 dot11CurrentTxAntenna MIB element (see
[IEEE.802-11.2007]).
Antenna Selection: One 8-bit antenna configuration value per
antenna in the WTP, containing up to 255 antennas. The following
enumerated values are supported:
1 - Internal Antenna
2 - External Antenna
6.3. IEEE 802.11 Assigned WTP BSSID
The IEEE 802.11 Assigned WTP BSSID is only included by the WTP when
the IEEE 802.11 WLAN Configuration Request included the IEEE 802.11
Add WLAN message element. The BSSID value field of this message
element contains the BSSID that has been assigned by the WTP,
enabling the WTP to perform its own BSSID assignment.
The WTP is free to assign the BSSIDs the way it sees fit, but it is
highly recommended that the WTP assign the BSSID using the following
algorithm: BSSID = {base BSSID} + WLAN ID.
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Radio ID | WLAN ID | BSSID
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| BSSID |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Type: 1026 for IEEE 802.11 Assigned WTP BSSID
Length: 8
Radio ID: An 8-bit value representing the radio, whose value is
between one (1) and 31.
WLAN ID: An 8-bit value specifying the WLAN Identifier. The value
MUST be between one (1) and 16.
BSSID: The BSSID assigned by the WTP for the WLAN created as a
result of receiving an IEEE 802.11 Add WLAN.
6.4. IEEE 802.11 Delete WLAN
The IEEE 802.11 Delete WLAN message element is used to inform the WTP
that a previously created WLAN is to be deleted, and contains the
following fields:
0 1
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Radio ID | WLAN ID |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Type: 1027 for IEEE 802.11 Delete WLAN
Length: 2
Radio ID: An 8-bit value representing the radio, whose value is
between one (1) and 31.
WLAN ID: An 8-bit value specifying the WLAN Identifier. The value
MUST be between one (1) and 16.
6.5. IEEE 802.11 Direct Sequence Control
The IEEE 802.11 Direct Sequence Control message element is a bi-
directional element. When sent by the WTP, it contains the current
state. When sent by the AC, the WTP MUST adhere to the values
provided. This element is only used for IEEE 802.11b radios. The
message element has the following fields.
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Radio ID | Reserved | Current Chan | Current CCA |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Energy Detect Threshold |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Type: 1028 for IEEE 802.11 Direct Sequence Control
Length: 8
Radio ID: An 8-bit value representing the radio to configure, whose
value is between one (1) and 31.
Reserved: All implementations complying with this protocol MUST set
to zero any bits that are reserved in the version of the protocol
supported by that implementation. Receivers MUST ignore all bits
not defined for the version of the protocol they support.
Current Channel: This attribute contains the current operating
frequency channel of the Direct Sequence Spread Spectrum (DSSS)
PHY. This value comes from the IEEE 802.11 dot11CurrentChannel
MIB element (see [IEEE.802-11.2007]).
Current CCA: The current Clear Channel Assessment (CCA) method in
operation, whose value can be found in the IEEE 802.11
dot11CCAModeSupported MIB element (see [IEEE.802-11.2007]). Valid
values are:
1 - energy detect only (edonly)
2 - carrier sense only (csonly)
4 - carrier sense and energy detect (edandcs)
8 - carrier sense with timer (cswithtimer)
16 - high rate carrier sense and energy detect (hrcsanded)
Energy Detect Threshold: The current Energy Detect Threshold being
used by the DSSS PHY. The value can be found in the IEEE 802.11
dot11EDThreshold MIB element (see [IEEE.802-11.2007]).
6.6. IEEE 802.11 Information Element
The IEEE 802.11 Information Element is used to communicate any IE
defined in the IEEE 802.11 protocol. The data field contains the raw
IE as it would be included within an IEEE 802.11 MAC management
message.
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Radio ID | WLAN ID |B|P| Reserved |Info Element...
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Type: 1029 for IEEE 802.11 Information Element
Length: >= 4
Radio ID: An 8-bit value representing the radio, whose value is
between one (1) and 31.
WLAN ID: An 8-bit value specifying the WLAN Identifier. The value
MUST be between one (1) and 16.
B: When set, the WTP is to include the Information Element in IEEE
802.11 Beacons associated with the WLAN.
P: When set, the WTP is to include the Information Element in Probe
Responses associated with the WLAN.
Reserved: All implementations complying with this protocol MUST set
to zero any bits that are reserved in the version of the protocol
supported by that implementation. Receivers MUST ignore all bits
not defined for the version of the protocol they support.
Info Element: The IEEE 802.11 Information Element, which includes
the type, length, and value field.
6.7. IEEE 802.11 MAC Operation
The IEEE 802.11 MAC Operation message element is sent by the AC to
set the IEEE 802.11 MAC parameters on the WTP, and contains the
following fields.
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Radio ID | Reserved | RTS Threshold |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Short Retry | Long Retry | Fragmentation Threshold |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Tx MSDU Lifetime |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Rx MSDU Lifetime |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Type: 1030 for IEEE 802.11 MAC Operation
Length: 16
Radio ID: An 8-bit value representing the radio to configure, whose
value is between one (1) and 31.
Reserved: All implementations complying with this protocol MUST set
to zero any bits that are reserved in the version of the protocol
supported by that implementation. Receivers MUST ignore all bits
not defined for the version of the protocol they support.
RTS Threshold: This attribute indicates the number of octets in an
MAC Protocol Data Unit (MPDU), below which a Request To Send/Clear
To Send (RTS/CTS) handshake MUST NOT be performed. An RTS/CTS
handshake MUST be performed at the beginning of any frame exchange
sequence where the MPDU is of type Data or Management, the MPDU
has an individual address in the Address1 field, and the length of
the MPDU is greater than this threshold. Setting this attribute
to be larger than the maximum MSDU size MUST have the effect of
turning off the RTS/CTS handshake for frames of Data or Management
type transmitted by this STA. Setting this attribute to zero MUST
have the effect of turning on the RTS/CTS handshake for all frames
of Data or Management type transmitted by this STA. The default
value of this attribute MUST be 2347. The value of this field
comes from the IEEE 802.11 dot11RTSThreshold MIB element, (see
[IEEE.802-11.2007]).
Short Retry: This attribute indicates the maximum number of
transmission attempts of a frame, the length of which is less than
or equal to RTSThreshold, that MUST be made before a failure
condition is indicated. The default value of this attribute MUST
be 7. The value of this field comes from the IEEE 802.11
dot11ShortRetryLimit MIB element, (see [IEEE.802-11.2007]).
Long Retry: This attribute indicates the maximum number of
transmission attempts of a frame, the length of which is greater
than dot11RTSThreshold, that MUST be made before a failure
condition is indicated. The default value of this attribute MUST
be 4. The value of this field comes from the IEEE 802.11
dot11LongRetryLimit MIB element, (see [IEEE.802-11.2007]).
Fragmentation Threshold: This attribute specifies the current
maximum size, in octets, of the MPDU that MAY be delivered to the
PHY. A MAC Service Data Unit (MSDU) MUST be broken into fragments
if its size exceeds the value of this attribute after adding MAC
headers and trailers. An MSDU or MAC Management Protocol Data
Unit (MMPDU) MUST be fragmented when the resulting frame has an
individual address in the Address1 field, and the length of the
frame is larger than this threshold. The default value for this
attribute MUST be the lesser of 2346 or the aMPDUMaxLength of the
attached PHY and MUST never exceed the lesser of 2346 or the
aMPDUMaxLength of the attached PHY. The value of this attribute
MUST never be less than 256. The value of this field comes from
the IEEE 802.11 dot11FragmentationThreshold MIB element, (see
[IEEE.802-11.2007]).
Tx MSDU Lifetime: This attribute specifies the elapsed time in Time
Units (TUs), after the initial transmission of an MSDU, after
which further attempts to transmit the MSDU MUST be terminated.
The default value of this attribute MUST be 512. The value of
this field comes from the IEEE 802.11 dot11MaxTransmitMSDULifetime
MIB element, (see [IEEE.802-11.2007]).
Rx MSDU Lifetime: This attribute specifies the elapsed time in TU,
after the initial reception of a fragmented MMPDU or MSDU, after
which further attempts to reassemble the MMPDU or MSDU MUST be
terminated. The default value MUST be 512. The value of this
field comes from the IEEE 802.11 dot11MaxReceiveLifetime MIB
element, (see [IEEE.802-11.2007]).
6.8. IEEE 802.11 MIC Countermeasures
The IEEE 802.11 MIC Countermeasures message element is sent by the
WTP to the AC to indicate the occurrence of a MIC failure. For more
information on MIC failure events, see the
dot11RSNATKIPCounterMeasuresInvoked MIB element definition in
[IEEE.802-11.2007].
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Radio ID | WLAN ID | MAC Address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| MAC Address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Type: 1031 for IEEE 802.11 MIC Countermeasures
Length: 8
Radio ID: The Radio Identifier, whose value is between one (1) and
31, typically refers to some interface index on the WTP.
WLAN ID: This 8-bit unsigned integer includes the WLAN Identifier,
on which the MIC failure occurred. The value MUST be between one
(1) and 16.
MAC Address: The MAC Address of the station that caused the MIC
failure.
6.9. IEEE 802.11 Multi-Domain Capability
The IEEE 802.11 Multi-Domain Capability message element is used by
the AC to inform the WTP of regulatory limits. The AC will transmit
one message element per frequency band to indicate the regulatory
constraints in that domain. The message element contains the
following fields.
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Radio ID | Reserved | First Channel # |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Number of Channels | Max Tx Power Level |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Type: 1032 for IEEE 802.11 Multi-Domain Capability
Length: 8
Radio ID: An 8-bit value representing the radio to configure, whose
value is between one (1) and 31.
Reserved: All implementations complying with this protocol MUST set
to zero any bits that are reserved in the version of the protocol
supported by that implementation. Receivers MUST ignore all bits
not defined for the version of the protocol they support.
First Channel #: This attribute indicates the value of the lowest
channel number in the sub-band for the associated domain country
string. The value of this field comes from the IEEE 802.11
dot11FirstChannelNumber MIB element (see [IEEE.802-11.2007]).
Number of Channels: This attribute indicates the value of the total
number of channels allowed in the sub-band for the associated
domain country string (see Section 6.23). The value of this field
comes from the IEEE 802.11 dot11NumberofChannels MIB element (see
[IEEE.802-11.2007]).
Max Tx Power Level: This attribute indicates the maximum transmit
power, in dBm, allowed in the sub-band for the associated domain
country string (see Section 6.23). The value of this field comes
from the IEEE 802.11 dot11MaximumTransmitPowerLevel MIB element
(see [IEEE.802-11.2007]).
6.10. IEEE 802.11 OFDM Control
The IEEE 802.11 Orthogonal Frequency Division Multiplexing (OFDM) Control message element is a bi-directional element. When sent by the WTP, it contains the current state. When sent by the AC, the WTP MUST adhere to the received values. This message element is only used for 802.11a radios and contains the following fields: 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Radio ID | Reserved | Current Chan | Band Support | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | TI Threshold | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Type: 1033 for IEEE 802.11 OFDM Control Length: 8 Radio ID: An 8-bit value representing the radio to configure, whose value is between one (1) and 31. Reserved: All implementations complying with this protocol MUST set to zero any bits that are reserved in the version of the protocol supported by that implementation. Receivers MUST ignore all bits not defined for the version of the protocol they support. Current Channel: This attribute contains the current operating frequency channel of the OFDM PHY. The value of this field comes from the IEEE 802.11 dot11CurrentFrequency MIB element (see [IEEE.802-11.2007]). Band Supported: The capability of the OFDM PHY implementation to operate in the three Unlicensed National Information Infrastructure (U-NII) bands. The value of this field comes from the IEEE 802.11 dot11FrequencyBandsSupported MIB element (see [IEEE.802-11.2007]), coded as a bit field, whose values are: Bit 0 - capable of operating in the 5.15-5.25 GHz band Bit 1 - capable of operating in the 5.25-5.35 GHz band Bit 2 - capable of operating in the 5.725-5.825 GHz band
Bit 3 - capable of operating in the 5.47-5.725 GHz band
Bit 4 - capable of operating in the lower Japanese 5.25 GHz band
Bit 5 - capable of operating in the 5.03-5.091 GHz band
Bit 6 - capable of operating in the 4.94-4.99 GHz band
For example, for an implementation capable of operating in the
5.15-5.35 GHz bands, this attribute would take the value 3.
TI Threshold: The threshold being used to detect a busy medium
(frequency). CCA MUST report a busy medium upon detecting the
RSSI above this threshold. The value of this field comes from the
IEEE 802.11 dot11TIThreshold MIB element (see [IEEE.802-11.2007]).
6.11. IEEE 802.11 Rate Set
The rate set message element value is sent by the AC and contains the
supported operational rates. It contains the following fields.
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Radio ID | Rate Set...
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Type: 1034 for IEEE 802.11 Rate Set
Length: >= 3
Radio ID: An 8-bit value representing the radio to configure, whose
value is between one (1) and 31.
Rate Set: The AC generates the Rate Set that the WTP is to include
in its Beacon and Probe messages. The length of this field is
between 2 and 8 bytes. The value of this field comes from the
IEEE 802.11 dot11OperationalRateSet MIB element (see
[IEEE.802-11.2007]).
6.12. IEEE 802.11 RSNA Error Report From Station
The IEEE 802.11 RSN Error Report From Station message element is used
by a WTP to send RSN error reports to the AC. The WTP does not need
to transmit any reports that do not include any failures. The fields
from this message element come from the IEEE 802.11
Dot11RSNAStatsEntry table, see [IEEE.802-11.2007].
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Client MAC Address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Client MAC Address | BSSID |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| BSSID |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Radio ID | WLAN ID | Reserved |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| TKIP ICV Errors |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| TKIP Local MIC Failures |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| TKIP Remote MIC Failures |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| CCMP Replays |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| CCMP Decrypt Errors |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| TKIP Replays |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Type: 1035 for IEEE 802.11 RSNA Error Report From Station
Length: 40
Client MAC Address: The Client MAC Address of the station.
BSSID: The BSSID on which the failures are being reported.
Radio ID: The Radio Identifier, whose value is between one (1) and
31, typically refers to some interface index on the WTP.
WLAN ID: The WLAN ID on which the RSNA failures are being reported.
The value MUST be between one (1) and 16.
Reserved: All implementations complying with this protocol MUST set
to zero any bits that are reserved in the version of the protocol
supported by that implementation. Receivers MUST ignore all bits
not defined for the version of the protocol they support.
TKIP ICV Errors: A 32-bit value representing the number of Temporal
Key Integrity Protocol (TKIP) (as defined in [IEEE.802-11.2007])
ICV errors encountered when decrypting packets from the station.
The value of this field comes from the IEEE 802.11
dot11RSNAStatsTKIPICVErrors MIB element (see [IEEE.802-11.2007]).
TKIP Local MIC Failures: A 32-bit value representing the number of
MIC failures encountered when checking the integrity of packets
received from the station. The value of this field comes from the
IEEE 802.11 dot11RSNAStatsTKIPLocalMICFailures MIB element (see
[IEEE.802-11.2007]).
TKIP Remote MIC Failures: A 32-bit value representing the number of
MIC failures reported by the station encountered (possibly via the
EAPOL-Key frame). The value of this field comes from the IEEE
802.11 dot11RSNAStatsTKIPRemoteMICFailures MIB element (see
[IEEE.802-11.2007]).
CCMP Replays: A 32-bit value representing the number of CCMP MPDUs
discarded by the replay detection mechanism. The value of this
field comes from the IEEE 802.11 dot11RSNACCMPReplays MIB element
(see [IEEE.802-11.2007]).
CCMP Decrypt Errors: A 32-bit value representing the number of CCMP
MDPUs discarded by the decryption algorithm. The value of this
field comes from the IEEE 802.11 dot11RSNACCMPDecryptErrors MIB
element (see [IEEE.802-11.2007]).
TKIP Replays: A 32-bit value representing the number of TKIP
Replays detected in frames received from the station. The value
of this field comes from the IEEE 802.11 dot11RSNAStatsTKIPReplays
MIB element (see [IEEE.802-11.2007]).
6.13. IEEE 802.11 Station
The IEEE 802.11 Station message element accompanies the Add Station
message element, and is used to deliver IEEE 802.11 station policy
from the AC to the WTP.
The latest IEEE 802.11 Station message element overrides any
previously received message elements.
If the QoS field is set, the WTP MUST observe and provide policing of
the 802.11e priority tag to ensure that it does not exceed the value
provided by the AC.
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Radio ID | Association ID | Flags |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| MAC Address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| MAC Address | Capabilities |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| WLAN ID |Supported Rates|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Type: 1036 for IEEE 802.11 Station
Length: >= 14
Radio ID: An 8-bit value representing the radio, whose value is
between one (1) and 31.
Association ID: A 16-bit value specifying the IEEE 802.11
Association Identifier.
Flags: All implementations complying with this protocol MUST set to
zero any bits that are reserved in the version of the protocol
supported by that implementation. Receivers MUST ignore all bits
not defined for the version of the protocol they support.
MAC Address: The station's MAC Address
Capabilities: A 16-bit field containing the IEEE 802.11
Capabilities Information Field to use with the station.
WLAN ID: An 8-bit value specifying the WLAN Identifier. The value
MUST be between one (1) and 16.
Supported Rates: The variable-length field containing the supported
rates to be used with the station, as found in the IEEE 802.11
dot11OperationalRateSet MIB element (see [IEEE.802-11.2007]).
This field MUST NOT exceed 126 octets and specifies the set of
data rates at which the station may transmit data, where each
octet represents a data rate.
6.14. IEEE 802.11 Station QoS Profile
The IEEE 802.11 Station QoS Profile message element contains the
maximum IEEE 802.11e priority tag that may be used by the station.
Any packet received that exceeds the value encoded in this message
element MUST be tagged using the maximum value permitted by to the
user. The priority tag MUST be between zero (0) and seven (7). This message element MUST NOT be present without the IEEE 802.11 Station (see Section 6.13) message element. 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | MAC Address | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | MAC Address | Reserved |8021p| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Type: 1037 for IEEE 802.11 Station QoS Profile Length: 8 MAC Address: The station's MAC Address Reserved: All implementations complying with this protocol MUST set to zero any bits that are reserved in the version of the protocol supported by that implementation. Receivers MUST ignore all bits not defined for the version of the protocol they support. 8021p: The maximum 802.1p priority value that the WTP will allow in the Traffic Identifier (TID) field in the extended 802.11e QoS Data header.6.15. IEEE 802.11 Station Session Key
The IEEE 802.11 Station Session Key message element is sent by the AC to provision encryption keys, or to configure an access policy, on the WTP. This message element MUST NOT be present without the IEEE 802.11 Station (see Section 6.13) message element, and MUST NOT be sent if the WTP had not specifically advertised support for the requested encryption scheme, through the WTP Descriptor Message Element's Encryption Capabilities field (see Section 8.1). When the Key field is non-zero in length, the RSN Information Element MUST be sent along with the IEEE 802.11 Station Session Key in order to instruct the WTP on the usage of the Key field. The WTP MUST observe the Authentication and Key Management (AKM) field of the RSN Information Element in order to identify the authentication protocol to be enforced with the station. If cryptographic services are provided at the WTP, the WTP MUST observe the algorithm dictated in the Pairwise Cipher Suite field of the RSN Information Element sent by the AC. The RSN Information Element included here is the one sent by the AC in the third message
of the 4-Way Key Handshake, which specifies which cipher is to be
applied to provide encryption and decryption services with the
station. The RSN Information Element is used to communicate any
supported algorithm, including WEP, TKIP, and AES-CCMP. In the case
of static WEP keys, the RSN Information Element is still used to
indicate the cryptographic algorithm even though no key exchange
occurred.
If the IEEE 802.11 Station Session Key message element's 'AKM-Only'
bit is set, the WTP MUST drop all IEEE 802.11 packets that are not
part of the Authentication and Key Management (AKM), such as EAP.
Note that AKM-Only MAY be set while an encryption key is in force,
requiring that the AKM packets be encrypted. Once the station has
successfully completed authentication via the AKM, the AC MUST send a
new Add Station message element to remove the AKM-Only restriction,
and optionally push the session key down to the WTP.
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| MAC Address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| MAC Address |A|C| Flags |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Pairwise TSC |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Pairwise TSC | Pairwise RSC |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Pairwise RSC |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Key...
+-+-+-+-+-+-+-+-
Type: 1038 for IEEE 802.11 Station Session Key
Length: >= 25
MAC Address: The station's MAC Address
Flags: All implementations complying with this protocol MUST set to
zero any bits that are reserved in the version of the protocol
supported by that implementation. Receivers MUST ignore all bits
not defined for the version of the protocol they support. The
following bits are defined:
A: The 1-bit AKM-Only field is set by the AC to inform the WTP
that is MUST NOT accept any 802.11 Data Frames other than AKM
frames. This is the equivalent of the WTP's IEEE 802.1X port
for the station to be in the closed state. When set, the WTP
MUST drop any non-IEEE 802.1X packets it receives from the
station.
C: The 1-bit field is set by the AC to inform the WTP that
encryption services will be provided by the AC. When set,
the WTP SHOULD police frames received from stations to ensure
that they are properly encrypted as specified in the RSN
Information Element, but does not need to take specific
cryptographic action on the frame. Similarly, for
transmitted frames, the WTP only needs to forward already
encrypted frames. Since packets received by the WTP will be
encrypted, the WTP cannot modify the contents of the packets,
including modifying the DSCP markings of the encapsulated
packet. In this case, this function would be the
responsibility of the AC.
Pairwise TSC: The 6-byte Transmit Sequence Counter (TSC) field to
use for unicast packets transmitted to the station.
Pairwise RSC: The 6-byte Receive Sequence Counter (RSC) to use for
unicast packets received from the station.
Key: The pairwise key the WTP is to use when encrypting traffic to/
from the station. The format of the keys differs based on the
crypto algorithm used. For unicast WEP keys, the Key field
consists of the actual unicast encryption key (note, this is used
when WEP is used in conjunction with 802.1X, and therefore a
unicast encryption key exists). When used with CCMP, the Key
field includes the 128-bit Temporal Key. When used with TKIP, the
Key field includes the 256-bit Temporal Key (which consists of a
128-bit key used as input for TKIP key mixing, and two 64-bit keys
used for Michael).
(page 50 continued on part 3)
