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Description

The command is used to configure a radio module.

Syntax:

rf interface parameters...

Interface rf5.0 parameters:

• "band   XXX" - bandwidth (MHz) - {double (40)|full (20)|half (10)|quarter (5)}
• "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
• "cap" - RF capabilities
• "dist   XXX" - distance in kilometers or auto
• "txrt   XXX" - max transmit retries [15]
• "txvrt  XXX" - max transmit retries in voice mode [5]
• "[-]burst" - burst mode
• "[-]shortgi" - short guard interval mode
• "noise  XXX" - Noise floor threshold, dB [20]
• "[-]pwrctl" - automatic TPC mode
• "[-]wocd"
• "[modulation OFDM | CCK]"
• "[chntime XXX]"
• "[statistics]"
• "[-]bcsid".

Sets parameters of a radio module specified by the if-name (name of the radio interface) parameter, or displays them if executed without any optional parameter. Optional parameters are as follows:

• "band XXX" - this option allows choosing the bandwidth for transmission (in MHz). Double means 40MHz, Full - 20MHz, half – 10MHz, quarter – 5MHz. Units in one PtP or PtMP connection must have the same bandwidth.

Example,

rf rf5.0 band half

• "grid B G" - this option allows creating a customized frequency grid within the license restrictions. The frequency grid for every band is formed in the form of a list of sub ranges with the defined frequency step (start frequency–end frequency/step), or a list of comma delimited standalone frequencies.

Syntax:

IFNAME grid BAND FREQUENCY_RANGE_LIST

Example,

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interface. This section describes the command in WANFleX software version with Polling technology support.

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

Parameters

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To remove a frequency grid:

rf IFNAME grid BAND clear

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The maximum bitrate is limited by the specific model.

If the router is configured as a BS and autobitrate mode is turned on, this parameter will specify the maximum transmitting speed for the BS.

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There are several ways to manage this parameter:

• To set an exact value (in kilometers)
• Use automatic distance calculation (by default). In this case the unit will calculate and set the link distance automatically. In the configuration an automatically calculated value is displayed after the auto parameter: auto (XX).

Auto mode is recommended!

If the distance parameter is set to 0 radio module will use default settings.

• "txrt XXX" - this parameter sets the maximum number of repeat requests (transmit retries) to be done when sending unicast packets. 15 by default
• "txvrt XXX" - this parameter sets the maximum number of repeat requests for data packets (excluding voice packets) in voice mode. 5 by default. The maximum allowed value is 64. Voice mode is turned on automatically when VoIP traffic appears
• "burst" - enables the BURST protocol. “-burst” disables the BURST protocol support. Enabled by default.

The BURST protocol consists in grouping several short packets with the same destination address on a radio link into larger packets, thus cardinally decreasing the response time for applications generating streams of short packets. Burst enabling relates to a radio interface as a whole, and means only that you want to use this mode in this 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 enabling does not induce any changes in the work of other devices in the network. The BURST protocol reaches its maximal efficiency on high throughput point-to-point "backbone" links.

Some statistics about BURST protocol operation can be viewed by using the "muf stat" command.

• "shortgi" - enables the short guard interval mode. Using short guard interval 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.

To disable type “-shortgi”. Enabled by default.

• "noise XXX" - sets Noise Floor Threshold for radio interface. Measured in decibel. By default Noise Floor Threshold is 20 dB. Noise Floor 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. See Noise Floor and Noise floor Threshold values with “rf IFNAME stat” command
• "pwrctl" - enables Automatic Transmit Power Control (ATPC) on the per-packet basis. When it is enabled (“rf rf5.0 txpwr <power> pwrctl”) 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. Transmit power adjustment is estimated for each sending packet. The upper bound of output power values that can be set by ATPC is limited by the power value specified in “txpwr” parameter.
• “-pwrctl” disables ATPC. Enabled by default.
• "wocd" - disables carrier sense on the radio interface when sending data packets. May only be used on a base station working in WMA (Wireless Marker Access) mode. Reduces the number of retransmitted packets, thus increasing effective throughput of a multipoint radio link. "-wocd" re-enables the standard mechanism of permanent carrier sense. Initial setting is "-wocd" (carrier sense enabled)
• "modulation" - sets the modulation technique for the radio. For 5-6GHz radios OFDM mode is always turned on. For 2.4GHz radios both cck and ofdm modes are available:
  • cck
  • ofdm
• "chntime" - Channel Burst Time. The time for the unit to occupy the radio channel. By default – 0 (dynamic, is not displayed in the configuration). Set in microseconds. Recommended value for PtP links – 5000 (20 MHz channel width)
• "statistics" - displays the radio module's statistics with 1 second update interval.

Below tables show "rfconfig stat" command output for 5GHz and 2.4GHz devices:

• "bcsid" -  enables SID broadcasting (in beacon service packets which are regularly sent by the radio module). This feature is a potential weak place in the security because it lets the device to reply to subscriber's cards requests having no SID value (ANY). Though MINT protocol exclude the possibility of unauthorized network connection, such device's behavior leads to its unstable work, failures and communication link delays
• “-bcsid” disables SID broadcasting. Disabled by default.

Examples,

Examples

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

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

mint rf5.0 profile 1 -band 20
rf band 20

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          |
+--------------------------------------+--------------------------------------+