Linux and network card problems?

Question

linux

Hello guys, help me solve the subject, I've already rummaged through everything.
There is a Rasbery PI 3 and an ORICO externally powered hub with 10 USB ports.

4g modems are connected to usb ports for a mobile farm for their own tasks.
The disassemble includes only 1 usb port with a hub.
6 network cards connect without problems, no lag bugs, but as soon as you stick 7, the system slows down wildly.
I checked all the logs, there are no errors with the power supply, the block is good, the lightning does not appear either.
The processor is not loaded, the memory is occupied by 15% maximum.

What's the magic? How to debug this miracle (problem).

need help....

dmesg

+0.202162] usb 1-1.2.3.4.1: New USB device found, idVendor=19d2, idProduct=1225, bcdDevice=53.25
[  +0.000028] usb 1-1.2.3.4.1: New USB device strings: Mfr=2, Product=4, SerialNumber=5
[  +0.000020] usb 1-1.2.3.4.1: Product: DEMO Mobile Boardband
[  +0.000018] usb 1-1.2.3.4.1: Manufacturer: DEMO,Incorporated
[  +0.000019] usb 1-1.2.3.4.1: SerialNumber: 1234567890ABCDEF
[  +0.011734] usb-storage 1-1.2.3.4.1:1.0: USB Mass Storage device detected
[  +0.001743] usb-storage 1-1.2.3.4.1:1.0: Quirks match for vid 19d2 pid 1225: 1
[  +0.002826] scsi host6: usb-storage 1-1.2.3.4.1:1.0
[  +1.022540] scsi 6:0:0:0: CD-ROM            ZTE      USB SCSI CD-ROM  2.3  PQ: 0 ANSI: 2
[  +0.001876] sr 6:0:0:0: Power-on or device reset occurred
[  +0.002480] sr 6:0:0:0: [sr6] scsi-1 drive
[  +0.062888] sr 6:0:0:0: Attached scsi CD-ROM sr6
[  +4.671715] usb 1-1.2.3.4.1: reset high-speed USB device number 90 using dwc_otg
[  +0.200287] usb 1-1.2.3.4.1: device firmware changed
[  +0.000426] usb 1-1.2.3.4.1: USB disconnect, device number 90
[  +0.263295] usb 1-1.2.3.4.1: new high-speed USB device number 91 using dwc_otg
[  +0.202388] usb 1-1.2.3.4.1: New USB device found, idVendor=19d2, idProduct=1405, bcdDevice=53.25
[  +0.000028] usb 1-1.2.3.4.1: New USB device strings: Mfr=2, Product=4, SerialNumber=5
[  +0.000019] usb 1-1.2.3.4.1: Product: DEMO Mobile Boardband
[  +0.000019] usb 1-1.2.3.4.1: Manufacturer: DEMO,Incorporated
[  +0.000019] usb 1-1.2.3.4.1: SerialNumber: 1234567890ABCDEF
[  +0.280690] cdc_ether 1-1.2.3.4.1:1.0 eth1: register 'cdc_ether' at usb-3f980000.usb-1.2.3.4.1, ZTE CDC Ethernet Device, 34:4b:50:00:00:00
[  +0.005581] usb-storage 1-1.2.3.4.1:1.2: USB Mass Storage device detected
[  +0.002143] scsi host6: usb-storage 1-1.2.3.4.1:1.2
[  +0.035330] cdc_ether 1-1.2.3.4.1:1.0 lte7: renamed from eth1
[  +8.408633] scsi 6:0:0:0: CD-ROM            ZTE      USB SCSI CD-ROM  2.3  PQ: 0 ANSI: 2
[  +0.239785] sr 6:0:0:0: Power-on or device reset occurred
[  +1.000767] sr 6:0:0:0: [sr6] scsi-1 drive
[  +1.077139] cdc_ether 1-1.2.3.4.1:1.0 lte7: unregister 'cdc_ether' usb-3f980000.usb-1.2.3.4.1, ZTE CDC Ethernet Device

[  +0.002082] WARN::dwc_otg_hcd_urb_dequeue:638: Timed out waiting for FSM NP transfer to complete on 5

[  +0.000978] WARN::dwc_otg_hcd_urb_dequeue:638: Timed out waiting for FSM NP transfer to complete on 5

[  +0.000873] WARN::dwc_otg_hcd_urb_dequeue:638: Timed out waiting for FSM NP transfer to complete on 5

[  +0.001426] WARN::dwc_otg_hcd_urb_dequeue:638: Timed out waiting for FSM NP transfer to complete on 5

[  +0.000509] WARN::dwc_otg_hcd_urb_dequeue:638: Timed out waiting for FSM NP transfer to complete on 1

[  +0.000515] WARN::dwc_otg_hcd_urb_dequeue:638: Timed out waiting for FSM NP transfer to complete on 1

[  +0.000506] WARN::dwc_otg_hcd_urb_dequeue:638: Timed out waiting for FSM NP transfer to complete on 1

[  +0.000587] WARN::dwc_otg_hcd_urb_dequeue:638: Timed out waiting for FSM NP transfer to complete on 1
[  +0.725471] usb 1-1.2.3.4.1: USB disconnect, device number 91
[  +0.054936] sr 6:0:0:0: Attached scsi CD-ROM sr6
[Qun18 07:57] usb 1-1.2.3.4.1: new high-speed USB device number 92 using dwc_otg
[  +0.202181] usb 1-1.2.3.4.1: New USB device found, idVendor=19d2, idProduct=1225, bcdDevice=53.25
[  +0.000028] usb 1-1.2.3.4.1: New USB device strings: Mfr=2, Product=4, SerialNumber=5
[  +0.000020] usb 1-1.2.3.4.1: Product: DEMO Mobile Boardband
[  +0.000018] usb 1-1.2.3.4.1: Manufacturer: DEMO,Incorporated
[  +0.000019] usb 1-1.2.3.4.1: SerialNumber: 1234567890ABCDEF
[  +0.003435] usb-storage 1-1.2.3.4.1:1.0: USB Mass Storage device detected
[  +0.001364] usb-storage 1-1.2.3.4.1:1.0: Quirks match for vid 19d2 pid 1225: 1
[  +0.000949] scsi host6: usb-storage 1-1.2.3.4.1:1.0
[  +1.013672] scsi 6:0:0:0: CD-ROM            ZTE      USB SCSI CD-ROM  2.3  PQ: 0 ANSI: 2
[  +0.004568] sr 6:0:0:0: Power-on or device reset occurred
[  +0.006332] sr 6:0:0:0: [sr6] scsi-1 drive
[  +0.047812] sr 6:0:0:0: Attached scsi CD-ROM sr6
[  +5.069128] usb 1-1.2.3.4.1: USB disconnect, device number 92
[Qun18 07:58] usb 1-1.2.3.4.1: new high-speed USB device number 93 using dwc_otg
[  +0.202215] usb 1-1.2.3.4.1: New USB device found, idVendor=19d2, idProduct=1225, bcdDevice=53.25
[  +0.000026] usb 1-1.2.3.4.1: New USB device strings: Mfr=2, Product=4, SerialNumber=5
[  +0.000019] usb 1-1.2.3.4.1: Product: DEMO Mobile Boardband
[  +0.000020] usb 1-1.2.3.4.1: Manufacturer: DEMO,Incorporated
[  +0.000018] usb 1-1.2.3.4.1: SerialNumber: 1234567890ABCDEF
[  +0.002425] usb-storage 1-1.2.3.4.1:1.0: USB Mass Storage device detected
[  +0.001271] usb-storage 1-1.2.3.4.1:1.0: Quirks match for vid 19d2 pid 1225: 1
[  +0.000341] scsi host6: usb-storage 1-1.2.3.4.1:1.0
[  +1.010751] scsi 6:0:0:0: CD-ROM            ZTE      USB SCSI CD-ROM  2.3  PQ: 0 ANSI: 2
[  +0.001668] sr 6:0:0:0: Power-on or device reset occurred
[  +0.003031] sr 6:0:0:0: [sr6] scsi-1 drive
[  +0.062581] sr 6:0:0:0: Attached scsi CD-ROM sr6
[  +0.705076] usb 1-1.2.3.4.1: USB disconnect, device number 93
[Qun18 08:03] usb 1-1.2.4.3.3: new high-speed USB device number 94 using dwc_otg
[  +0.202491] usb 1-1.2.4.3.3: New USB device found, idVendor=19d2, idProduct=1225, bcdDevice=53.25
[  +0.000027] usb 1-1.2.4.3.3: New USB device strings: Mfr=2, Product=4, SerialNumber=5
[  +0.000020] usb 1-1.2.4.3.3: Product: DEMO Mobile Boardband
[  +0.000019] usb 1-1.2.4.3.3: Manufacturer: DEMO,Incorporated
[  +0.000018] usb 1-1.2.4.3.3: SerialNumber: 1234567890ABCDEF
[  +0.006149] usb-storage 1-1.2.4.3.3:1.0: USB Mass Storage device detected
[  +0.001414] usb-storage 1-1.2.4.3.3:1.0: Quirks match for vid 19d2 pid 1225: 1
[  +0.002086] scsi host6: usb-storage 1-1.2.4.3.3:1.0
[  +1.009571] scsi 6:0:0:0: CD-ROM            ZTE      USB SCSI CD-ROM  2.3  PQ: 0 ANSI: 2
[  +0.001570] sr 6:0:0:0: Power-on or device reset occurred
[  +0.003277] sr 6:0:0:0: [sr6] scsi-1 drive
[  +0.033618] sr 6:0:0:0: Attached scsi CD-ROM sr6
[  +4.763742] usb 1-1.2.4.3.3: reset high-speed USB device number 94 using dwc_otg
[  +0.200375] usb 1-1.2.4.3.3: device firmware changed
[  +0.000556] usb 1-1.2.4.3.3: USB disconnect, device number 94
[  +0.251082] usb 1-1.2.4.3.3: new high-speed USB device number 95 using dwc_otg
[  +0.202506] usb 1-1.2.4.3.3: New USB device found, idVendor=19d2, idProduct=1405, bcdDevice=53.25
[  +0.000028] usb 1-1.2.4.3.3: New USB device strings: Mfr=2, Product=4, SerialNumber=5
[  +0.000031] usb 1-1.2.4.3.3: Product: DEMO Mobile Boardband
[  +0.000018] usb 1-1.2.4.3.3: Manufacturer: DEMO,Incorporated
[  +0.000019] usb 1-1.2.4.3.3: SerialNumber: 1234567890ABCDEF
[  +0.209567] cdc_ether 1-1.2.4.3.3:1.0 eth1: register 'cdc_ether' at usb-3f980000.usb-1.2.4.3.3, ZTE CDC Ethernet Device, 34:4b:50:00:00:00
[  +0.002723] usb-storage 1-1.2.4.3.3:1.2: USB Mass Storage device detected
[  +0.006130] scsi host6: usb-storage 1-1.2.4.3.3:1.2
[  +1.012387] scsi 6:0:0:0: CD-ROM            ZTE      USB SCSI CD-ROM  2.3  PQ: 0 ANSI: 2
[  +0.001408] sr 6:0:0:0: Power-on or device reset occurred
[  +0.001314] sr 6:0:0:0: [sr6] scsi-1 drive
[  +0.060435] sr 6:0:0:0: Attached scsi CD-ROM sr6
[  +0.031159] scsi 6:0:0:1: Direct-Access     DEMO     MMC Storage      2.3  PQ: 0 ANSI: 2
[  +0.003857] sd 6:0:0:1: Power-on or device reset occurred
[  +0.073947] sd 6:0:0:1: [sdg] Attached SCSI removable disk

Answer 1

Still, it is worth checking the nutrition again for reasons:

• USB hub one fig takes power from raspberries, and maybe vice versa. There is exactly this in rpi4, I came across that raspberries began to eat from the hub
  
• calculate the peak power of all modems and compare whether the PSU delivers it, orico usually has 48 watts in total. On average, the modem eats 1.5 A at 5 V, which is already 7.5 watts. Total 7.5 * 6 (modems) = 45 watts, which is already the limit, add another modem and already 52.5 watts and the PSU will not take it out. And this is just offhand. most likely the modem eats more and in addition the raspberry itself can suck on the food
  
• the very first point follows from the previous point, the PSU goes into defense, all modems are thrown off, the consumption drops, it starts to turn on at this moment it can suck from the raspberry planting its power, gradually the modem starts up in a chain and starts to exceed the power budget again, the circle is closed and all over again. Hence the lags + a large number of USBs must be determined and the system apparently also stupid
  

In general, check the power supply and consider it, I am 100% sure the problem is in it.