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Description
The command is used to configure a radio interface. This section describes the command in WANFleX software version with Polling technology support.
CAUTION
Not all radio interfaces have the same set of parameters and options because it depends on the radio module type and standard. A complete list of parameters available for the specific interface can be displayed by "rf interface ?" command. Radio module type and its features list can be displayed by "rf interface cap" command.
Syntax:
usage: rf interface parameters... Interface rf5.0 parameters: band XXX: bandwidth (MHz) grid B G: frequency grid - <bw> freq1[-freq2[/step]],... | clear freq XXX: central frequency (MHz) bitr XXX: bitrate (Kbps) txpwr XXX: tx power (dBm) sid XXX: system identifier - up to 8 hex digits [10101010] cap [full]: RF capabilities dist XXX: distance in kilometers or auto txrt XXX: max transmit retries [15] txvrt XXX: max transmit retries in voice mode [6] [-]burst : burst mode (Super Packeting) [-]shortgi: short guard interval mode noise XXX: Noise floor threshold, dB [26] [-]pwrctl : automatic TPC mode mimo|miso [-]misoctl [-]greenfield
NOTE
If frequency roaming is enabled, make changes to the roaming profile using "mint profile" command before making changes on the unit.
Parameters
| Parameter | Description |
|---|---|
| cap | Displays the radio module capabilities including the information on power levels, frequencies etc. |
| band XXX | Allows choosing the bandwidth for transmission, can be specified as numeric or text values:
The ability to switch between different bandwidth values is determined by the license. Within the same wireless network, devices must have the same values for this parameter. |
| grid B G | Allows to create a customized frequency grid within the license restrictions, i.e. to form the list of operating frequencies.
The resulting frequency grid can be viewed in radio interface properties and used in all cases when the frequency is determined automatically ("roaming", "dfs" and so on).
|
| freq XXX | Sets central operating frequency in MHz. Must be equal at the both sides of the link. |
| bitr XXX | The bit transfer rate in Kbit/s of the radio link. Allowed values are:
|
| txpwr XXX | Sets the transmitter emitting power in dBm, maximal if ATPC is on, and fixed if off. The acceptable transmit power values can vary depending on the radio module type. |
| sid XXX | Network system identifier, a arbitrary hexadecimal number in the range of 1H to FFFFFFH. All routers that are supposed to see each other on the same radio link must have the same identifier. |
| dist XXX | Distance value between two devices (in kilometers). This parameter changes time values for some delays and time-outs thus making possible to work on longer distances with smooth adjustment. The "dist" parameter is only applied when sending network packets, therefore, it must be set on each network device.
The "0" value sets the default radio module settings. |
| txrt XXX | Sets the maximum number of repeat requests to be done when sending unicast packets. By default is 15. |
| txvrt XXX | Sets the maximum number of repeat requests for data packets (excluding voice packets) in voice mode. By default is 6. The maximum allowed value is 64. Voice mode is turned on automatically when VoIP traffic appears. |
| [-]burst | Enables/disables the BURST protocol support. The BURST protocol is grouping several short packets with the same destination address on a radio link into larger packets, thus significantly decreases the response time for applications when intensive streams of short packets appears. BURST has influence to a whole radio interface on selected device, but the BURST protocol can only work for destinations where it is also enabled at the other end, and only if MINT protocol is used at both sides. BURST does not affect the operation of other devices in the network. BURST protocol operation statistic can be viewed by using the "muffer stat" command. Enabled by default. |
| [-]shortgi | Enables/disables the short guard interval mode. Using of this mode allows the device to increase its throughput by reducing the time interval between symbols being transmitted. However, this may significantly increase the intersymbol interference and, thus, cause a higher errors rate. Enabled by default. |
| noise XXX | Sets Noise Floor Threshold for radio interface. Measured in decibel, by default is 20. Threshold is defined as a positive shift relative to the current level of noise which is measured by a device. The unit begins data transmission only when there are no signals in the air that have signal level higher than Noise Floor Threshold. To display Noise Floor and Noise floor Threshold values use the "stat" parameter. |
extnoise X | Raises / lowers the noise level, allows to reduce the interference influence (in case of level increasement) or to increase the received signal the modulation (in case of level decreasement). Available values are from -16 to 32 dB. By default - 0. |
| [-]pwrctl | Enables/disables Automatic Transmit Power Control (ATPC). When it is enabled the system automatically adjusts device’s output power to the optimal value that is necessary and sufficient to maintain the maximum productivity of the link in the given conditions. Enabled by default. |
| mimo|miso | Allows to select a signal coding method: MIMO or MISO. |
| [-]misoctl | In this mode the device use MISO for transmission of service packets while working on a low modulation. It allows keep the link operation when a transmitter in one the polarizations fails or in case of signal levels imbalance in different streams. To disable this mode use the "-misoctl" parameter. |
| [-]greenfield | Enables/disables "Greenfield" mode. This mode reduces the transmitted frame size, removing the original (pre-802.11n) field from the header. Allows to increase the performance by 15%, as well as avoid the processing and decoding of noise preambles, which leads to an improvement of signal quality. |
| stat | Displays the radio module's statistic. For more information about table values see "Examples" subsection.
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Examples
Displays the radio module's parameters. rfconfig cap Radio capabilities: Adapter name: Atheros AR9220 Wireless PCI Adapter. InfiNet Wireless RMM63 6.2 GHz Radio Subvendor: 0xfff1, Subid 0x6300 Power levels (dBm): min 0 max 23 step 0.5 (per packet power control supported) Greenfield mode supported MAC address: 000435230A20 Bandwidth modes: 28, 7, 14, 30, 15, 5, 10, 20, 40 |
Possible ways of how to set frequency grid are shown in the following example: rf rf5.0 grid 40 4920-5940/5 rf rf5.0 grid 20 5310-5390/10,5450,5500-5580/20 rf rf5.0 grid 10 5480, 5500, 5520, 5540, 5560, 5580 |
Set the bandwidth value 20 on the node which use frequency roaming. mint rf5.0 profile 1 -band 20 rf band 20 |
Display the current radio module's statistic. rf stat RF rf5.0 status UP (band 20, freq 6200) :ACTIVE DFS status DFSONLY (mode STA) +--------------------------------------+--------------------------------------+ | Receive statistics | Transmit statistics | +--------------------------------------+--------------------------------------+ | Broadcast Rate 104000 | Voice Mode OFF | | Bytes Received 3338045 | Bytes Transmitted 2650312 | | Packets Received OK 57173 | Packets Transmitted OK 55005 | | Load (kbps) 1442 | Load (kbps) 172 | | Load (pps) 257 | Load (pps) 187 | | Frame size (bytes) 701 | Frame size (bytes) 114 | +--------------------------------------+--------------------------------------+ | RX Medium Load 0.8% | TX Medium Load 0.6% | | Total Medium Busy 1.6% | | +--------------------------------------+--------------------------------------+ | Duplicate Received 0 | Total Retries 705 | | Aggr duplicates 0 | Aggr Subframe Retries 0 | | Aggr drops 0 | Aggr Full Retries 210 | | FIFO Overrun 0 | FIFO Underrun 0 | | CRC Errors 6 | Excessive Retries 47 | | Noise Floor -89 | Max aggr frames 3 | | Noise Floor Threshold -63 | Max aggr bytes 740 | | Scrambled frames 0 | Scrambled frames 0 | | Scramble errors 0 | Tx queue overflow 0 | +--------------------------------------+--------------------------------------+
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