OpenWRT Boot Times Affected by WiFi: Difference between revisions
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...wondering about long boot times for OpenWRT 25.x.y on a WRT32X or similar? | |||
Could it be WiFi related? Believe it or not: YES! | |||
=== /lib/firmware/regulatory.db === | |||
<pre> | <pre> | ||
( | country US: DFS-FCC | ||
# S1G Channel 1-3 | |||
(902 - 904 @ 2), (30) | |||
# S1G Channel 5-35 | |||
(904 - 920 @ 16), (30) | |||
# S1G Channel 37-51 | |||
(5250 - 5350 @ 80), (24), DFS, AUTO-BW | (920 - 928 @ 8), (30) | ||
(2400 - 2472 @ 40), (30) | |||
# 5.15 ~ 5.25 GHz: 30 dBm for master mode, 23 dBm for clients | |||
(5150 - 5250 @ 80), (23), AUTO-BW | |||
(5250 - 5350 @ 80), (24), DFS, AUTO-BW | |||
# This range ends at 5725 MHz, but channel 144 extends to 5730 MHz. | |||
# Since 5725 ~ 5730 MHz belongs to the next range which has looser | |||
# requirements, we can extend the range by 5 MHz to make the kernel | |||
# happy and be able to use channel 144. | |||
(5470 - 5730 @ 160), (24), DFS | |||
(5730 - 5850 @ 80), (31), AUTO-BW | |||
# https://www.federalregister.gov/documents/2021/05/03/2021-08802/use-of-the-5850-5925-ghz-band | |||
# max. 33 dBm AP @ 20MHz, 36 dBm AP @ 40Mhz+, 6 dB less for clients | |||
<code>DFS</code> means Dynamic Frequency Selection. The radio must check for radar before using that channel as an access point. This can delay wireless startup. | (5850 - 5895 @ 40), (27), NO-OUTDOOR, AUTO-BW, NO-IR | ||
# 6g band | |||
# https://www.federalregister.gov/documents/2020/05/26/2020-11236/unlicensed-use-of-the-6ghz-band | |||
(5925 - 7125 @ 320), (12), NO-OUTDOOR, NO-IR | |||
# 60g band | |||
# reference: section IV-D https://docs.fcc.gov/public/attachments/FCC-16-89A1.pdf | |||
# channels 1-6 EIRP=40dBm(43dBm peak) | |||
(57240 - 71000 @ 2160), (40) | |||
</pre><code>DFS</code> means Dynamic Frequency Selection. The radio must check for radar before using that channel as an access point. This can delay wireless startup. | |||
<code>AUTO-BW</code> means automatic bandwidth handling inside the regulatory code. It helps determine whether wider channels are allowed across compatible frequency ranges. It does not mean automatic channel selection. | <code>AUTO-BW</code> means automatic bandwidth handling inside the regulatory code. It helps determine whether wider channels are allowed across compatible frequency ranges. It does not mean automatic channel selection. | ||
| Line 37: | Line 45: | ||
<code>wmmrule=ETSI</code> applies ETSI Wireless Multimedia parameters. This affects Quality of Service / contention behavior, not DFS startup delay. | <code>wmmrule=ETSI</code> applies ETSI Wireless Multimedia parameters. This affects Quality of Service / contention behavior, not DFS startup delay. | ||
=== | === Try This (For Boot Speed Testing ONLY! Transmit Power ONLY changed to verify if OpenWRT does indeed read new config) === | ||
<syntaxhighlight lang="text"> | |||
country US: DFS-FCC | country US: DFS-FCC | ||
# S1G Channel 1-3 | # S1G Channel 1-3 | ||
(902 - 904 @ 2), ( | (902 - 904 @ 2), (33) | ||
# S1G Channel 5-35 | # S1G Channel 5-35 | ||
(904 - 920 @ 16), ( | (904 - 920 @ 16), (33) | ||
# S1G Channel 37-51 | # S1G Channel 37-51 | ||
(920 - 928 @ 8), ( | (920 - 928 @ 8), (33) | ||
(2400 - 2472 @ 40), ( | (2400 - 2472 @ 40), (33) | ||
# 5.15 ~ 5.25 GHz: 30 dBm for master mode, 23 dBm for clients | # 5.15 ~ 5.25 GHz: 30 dBm for master mode, 23 dBm for clients | ||
(5150 - 5250 @ 80), ( | (5150 - 5250 @ 80), (33), AUTO-BW | ||
(5250 - 5350 @ 80), ( | (5250 - 5350 @ 80), (33), AUTO-BW | ||
# This range ends at 5725 MHz, but channel 144 extends to 5730 MHz. | # This range ends at 5725 MHz, but channel 144 extends to 5730 MHz. | ||
# Since 5725 ~ 5730 MHz belongs to the next range which has looser | # Since 5725 ~ 5730 MHz belongs to the next range which has looser | ||
# requirements, we can extend the range by 5 MHz to make the kernel | # requirements, we can extend the range by 5 MHz to make the kernel | ||
# happy and be able to use channel 144. | # happy and be able to use channel 144. | ||
(5470 - 5730 @ 160), ( | (5470 - 5730 @ 160), (33), AUTO-BW | ||
(5730 - 5850 @ 80), ( | (5730 - 5850 @ 80), (33), AUTO-BW | ||
# https://www.federalregister.gov/documents/2021/05/03/2021-08802/use-of-the-5850-5925-ghz-band | # https://www.federalregister.gov/documents/2021/05/03/2021-08802/use-of-the-5850-5925-ghz-band | ||
# max. 33 dBm AP @ 20MHz, 36 dBm AP @ 40Mhz+, 6 dB less for clients | # max. 33 dBm AP @ 20MHz, 36 dBm AP @ 40Mhz+, 6 dB less for clients | ||
(5850 - 5895 @ 40), ( | (5850 - 5895 @ 40), (33), AUTO-BW | ||
# 6g band | # 6g band | ||
# https://www.federalregister.gov/documents/2020/05/26/2020-11236/unlicensed-use-of-the-6ghz-band | # https://www.federalregister.gov/documents/2020/05/26/2020-11236/unlicensed-use-of-the-6ghz-band | ||
(5925 - 7125 @ 320), (12), | (5925 - 7125 @ 320), (12), AUTO-BW | ||
# 60g band | # 60g band | ||
# reference: section IV-D https://docs.fcc.gov/public/attachments/FCC-16-89A1.pdf | # reference: section IV-D https://docs.fcc.gov/public/attachments/FCC-16-89A1.pdf | ||
# channels 1-6 EIRP=40dBm(43dBm peak) | # channels 1-6 EIRP=40dBm(43dBm peak) | ||
(57240 - 71000 @ 2160), (40) | (57240 - 71000 @ 2160), (40) | ||
</ | </syntaxhighlight>See? Now change it back to be legal. | ||
Revision as of 01:47, 29 June 2026
...wondering about long boot times for OpenWRT 25.x.y on a WRT32X or similar?
Could it be WiFi related? Believe it or not: YES!
/lib/firmware/regulatory.db
country US: DFS-FCC # S1G Channel 1-3 (902 - 904 @ 2), (30) # S1G Channel 5-35 (904 - 920 @ 16), (30) # S1G Channel 37-51 (920 - 928 @ 8), (30) (2400 - 2472 @ 40), (30) # 5.15 ~ 5.25 GHz: 30 dBm for master mode, 23 dBm for clients (5150 - 5250 @ 80), (23), AUTO-BW (5250 - 5350 @ 80), (24), DFS, AUTO-BW # This range ends at 5725 MHz, but channel 144 extends to 5730 MHz. # Since 5725 ~ 5730 MHz belongs to the next range which has looser # requirements, we can extend the range by 5 MHz to make the kernel # happy and be able to use channel 144. (5470 - 5730 @ 160), (24), DFS (5730 - 5850 @ 80), (31), AUTO-BW # https://www.federalregister.gov/documents/2021/05/03/2021-08802/use-of-the-5850-5925-ghz-band # max. 33 dBm AP @ 20MHz, 36 dBm AP @ 40Mhz+, 6 dB less for clients (5850 - 5895 @ 40), (27), NO-OUTDOOR, AUTO-BW, NO-IR # 6g band # https://www.federalregister.gov/documents/2020/05/26/2020-11236/unlicensed-use-of-the-6ghz-band (5925 - 7125 @ 320), (12), NO-OUTDOOR, NO-IR # 60g band # reference: section IV-D https://docs.fcc.gov/public/attachments/FCC-16-89A1.pdf # channels 1-6 EIRP=40dBm(43dBm peak) (57240 - 71000 @ 2160), (40)
DFS means Dynamic Frequency Selection. The radio must check for radar before using that channel as an access point. This can delay wireless startup.
AUTO-BW means automatic bandwidth handling inside the regulatory code. It helps determine whether wider channels are allowed across compatible frequency ranges. It does not mean automatic channel selection.
NO-OUTDOOR means outdoor use is not allowed for that frequency range.
NO-IR means No Initiating Radiation. The device is not allowed to initiate transmissions on that range. In practice, this can prevent access point mode or active scanning.
NO-OFDM means Orthogonal Frequency-Division Multiplexing is not allowed. This is mostly relevant to special legacy restrictions.
wmmrule=ETSI applies ETSI Wireless Multimedia parameters. This affects Quality of Service / contention behavior, not DFS startup delay.
Try This (For Boot Speed Testing ONLY! Transmit Power ONLY changed to verify if OpenWRT does indeed read new config)
country US: DFS-FCC
# S1G Channel 1-3
(902 - 904 @ 2), (33)
# S1G Channel 5-35
(904 - 920 @ 16), (33)
# S1G Channel 37-51
(920 - 928 @ 8), (33)
(2400 - 2472 @ 40), (33)
# 5.15 ~ 5.25 GHz: 30 dBm for master mode, 23 dBm for clients
(5150 - 5250 @ 80), (33), AUTO-BW
(5250 - 5350 @ 80), (33), AUTO-BW
# This range ends at 5725 MHz, but channel 144 extends to 5730 MHz.
# Since 5725 ~ 5730 MHz belongs to the next range which has looser
# requirements, we can extend the range by 5 MHz to make the kernel
# happy and be able to use channel 144.
(5470 - 5730 @ 160), (33), AUTO-BW
(5730 - 5850 @ 80), (33), AUTO-BW
# https://www.federalregister.gov/documents/2021/05/03/2021-08802/use-of-the-5850-5925-ghz-band
# max. 33 dBm AP @ 20MHz, 36 dBm AP @ 40Mhz+, 6 dB less for clients
(5850 - 5895 @ 40), (33), AUTO-BW
# 6g band
# https://www.federalregister.gov/documents/2020/05/26/2020-11236/unlicensed-use-of-the-6ghz-band
(5925 - 7125 @ 320), (12), AUTO-BW
# 60g band
# reference: section IV-D https://docs.fcc.gov/public/attachments/FCC-16-89A1.pdf
# channels 1-6 EIRP=40dBm(43dBm peak)
(57240 - 71000 @ 2160), (40)See? Now change it back to be legal.