Solved A virtual switch slows Host's connection to other physical devices


Bree

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I'm running Hyper-V on Windows 11 Pro, General Availability Channel, build 22000.527.

The symptoms are almost identical to those @Kari described in this Win10 Guru article from 4 years ago.

Kari said:
Using any external switches other than the Default switch in Hyper-V ... file transfer between the host and its virtual machines or the host and other physical computers becomes impossible.

The Host is my 'system three' shown in the 'other info' section of 'My Computers' below. The virtual switch is using its Wi-Fi adapter, an Intel Wi-Fi 6 AX201. All my machines use Wi-Fi exclusively.

Just creating the virtual switch is enough to slow the Host's connection to physical machines or to an external HDD shared out from my router's USB port. Here's the transfer speeds from the Host PC to another physical PC, 14.5MB/s without a virtual switch, 355KB/s when I create a virtual switch.

Hyper-V - no virtual switch - host to another PC.png Hyper-V - with virtual switch - host to another PC.png

It may be relevant that the HDD share requires SMB 1.0/CIFS Client on the host machine, as SMB 1.0 is all that the router supports.
It is not relevant. With SMB 1.0 turned off in the host's 'Turn Windows features on or off' a virtual switch still causes exactly the same slow file transfers from the host to another physical PC.

A VM using the virtual switch also sees a slow download from the internet. Downloading a CU through Windows Update was about a tenth of the speed when using the default switch, as I found by changing from the virtual switch to the default switch part way through the download.

If I delete the virtual switch everything works normally, and as for the most part I only use the Default switch that's not too much of an inconvenience. I don't know for sure if any particular build introduced this problem, but I don't recall seeing this with its original clean install of the initial W11 public release, as installed on 11th October.

I never had any problem like this on my previous host machine, another PC that was running Windows 10 Pro.
 

My Computers

System One System Two

  • OS
    Windows 11 Home
    Computer type
    Laptop
    Manufacturer/Model
    Acer Aspire 3 A315-23
    CPU
    AMD Athlon Silver 3050U
    Memory
    8GB
    Graphics Card(s)
    Radeon Graphics
    Monitor(s) Displays
    laptop screen
    Screen Resolution
    1366x768 native resolution, up to 2560x1440 with Radeon Virtual Super Resolution
    Hard Drives
    1TB HDD
    Browser
    Edge, Firefox
    Antivirus
    Defender
    Other Info
    fully 'Windows 11 ready' laptop. Windows 10 C: partition migrated from my old unsupported 'main machine' then upgraded to 11. A test migration ran Insider builds for 2 months. When 11 was released on 5th October it was re-imaged back to 10 and was offered the upgrade in Windows Update on 20th October.


    My SYSTEM THREE is a Dell Latitude 5410, i7-10610U, 32GB RAM, 512GB ssd, Windows 11 Pro.
  • Operating System
    Windows 11 Pro
    Computer type
    Laptop
    Manufacturer/Model
    Dell Lattitude E4310
    CPU
    i5 M 520
    Motherboard
    0T6M8G
    Memory
    4GB
    Screen Resolution
    1366x768
    Hard Drives
    500GB HDD
    Browser
    Firefox, Edge
    Antivirus
    Defender
    Other Info
    unsupported machine: Legacy bios, MBR, TPM 1.2, upgraded from W10 to W11 using W10/W11 hybrid install media workaround.


    My SYSTEM THREE is a Dell Latitude 5410, i7-10610U, 32GB RAM, 512GB ssd, Windows 11 Pro.

cereberus

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I'm running Hyper-V on Windows 11 Pro, General Availability Channel, build 22000.527.

The symptoms are almost identical to those @Kari described in this Win10 Guru article from 4 years ago.



The Host is my 'system three' shown in the 'other info' section of 'My Computers' below. The virtual switch is using its Wi-Fi adapter, an Intel Wi-Fi 6 AX201. All my machines use Wi-Fi exclusively.

Just creating the virtual switch is enough to slow the Host's connection to physical machines or to an external HDD shared out from my router's USB port. Here's the transfer speeds from the Host PC to another physical PC, 14.5MB/s without a virtual switch, 355KB/s when I create a virtual switch.

View attachment 22978 View attachment 22979

It may be relevant that the HDD share requires SMB 1.0/CIFS Client on the host machine, as SMB 1.0 is all that the router supports.
It is not relevant. With SMB 1.0 turned off in the host's 'Turn Windows features on or off' a virtual switch still causes exactly the same slow file transfers from the host to another physical PC.

A VM using the virtual switch also sees a slow download from the internet. Downloading a CU through Windows Update was about a tenth of the speed when using the default switch, as I found by changing from the virtual switch to the default switch part way through the download.

If I delete the virtual switch everything works normally, and as for the most part I only use the Default switch that's not too much of an inconvenience. I don't know for sure if any particular build introduced this problem, but I don't recall seeing this with its original clean install of the initial W11 public release, as installed on 11th October.

I never had any problem like this on my previous host machine, another PC that was running Windows 10 Pro.

Hi @Bree, fear not!

See post I made a while back - this is a common issue and the two fixes here should sort it (my wifi adapter is same as yours). Actually issue dates back to W10 at least, and possibly W8.


Fix 1 - on wifi adapter

1645906616440.png

Fix 2 on hyper-v adapter (not sure if 1st two screens are essential but I would do them anyway)
Last two screens are required.

1645906577500.png

1645906659045.png

1645906835230.png

1645906889453.png
 
Last edited:

My Computer

System One

  • OS
    Windows 10 Pro + others in VHDs
    Computer type
    Laptop
    Manufacturer/Model
    ASUS Vivobook 14
    CPU
    I7
    Motherboard
    Yep, Laptop has one.
    Memory
    16 GB
    Graphics Card(s)
    Integrated Intel Iris XE
    Sound Card
    Realtek built in
    Monitor(s) Displays
    N/A
    Screen Resolution
    1920x1080
    Hard Drives
    1 TB Optane NVME SSD, 1 TB NVME SSD
    PSU
    Yep, got one
    Case
    Yep, got one
    Cooling
    Stella Artois
    Keyboard
    Built in
    Mouse
    Bluetooth , wired
    Internet Speed
    72 Mb/s :-(
    Browser
    Edge mostly
    Antivirus
    Defender
    Other Info
    TPM 2.0

Bree

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Hi @Bree, fear not!

See post I made a while back - this is a common issue and the two fixes here should sort it (my wifi adapter is same as yours). Actually issue dates back to W10 at least, and possibly W8.
Thank you! That works :thumbsup:

I found that I could leave Hyper-V Virtual Ethernet Adapter #2 at its defaults, but disabling the same 'send offload' settings in
Microsoft Network Adapter Multiplexor Driver instead had the same beneficial effect.

Hyper-V  virtual switch - disable send offload.png

and disabling packet coalescing for the Wi-Fi adapter as you described.

Hyper-V  virtual switch - disable packet coalessing.png
 

My Computers

System One System Two

  • OS
    Windows 11 Home
    Computer type
    Laptop
    Manufacturer/Model
    Acer Aspire 3 A315-23
    CPU
    AMD Athlon Silver 3050U
    Memory
    8GB
    Graphics Card(s)
    Radeon Graphics
    Monitor(s) Displays
    laptop screen
    Screen Resolution
    1366x768 native resolution, up to 2560x1440 with Radeon Virtual Super Resolution
    Hard Drives
    1TB HDD
    Browser
    Edge, Firefox
    Antivirus
    Defender
    Other Info
    fully 'Windows 11 ready' laptop. Windows 10 C: partition migrated from my old unsupported 'main machine' then upgraded to 11. A test migration ran Insider builds for 2 months. When 11 was released on 5th October it was re-imaged back to 10 and was offered the upgrade in Windows Update on 20th October.


    My SYSTEM THREE is a Dell Latitude 5410, i7-10610U, 32GB RAM, 512GB ssd, Windows 11 Pro.
  • Operating System
    Windows 11 Pro
    Computer type
    Laptop
    Manufacturer/Model
    Dell Lattitude E4310
    CPU
    i5 M 520
    Motherboard
    0T6M8G
    Memory
    4GB
    Screen Resolution
    1366x768
    Hard Drives
    500GB HDD
    Browser
    Firefox, Edge
    Antivirus
    Defender
    Other Info
    unsupported machine: Legacy bios, MBR, TPM 1.2, upgraded from W10 to W11 using W10/W11 hybrid install media workaround.


    My SYSTEM THREE is a Dell Latitude 5410, i7-10610U, 32GB RAM, 512GB ssd, Windows 11 Pro.

cereberus

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Thank you! That works :thumbsup:

I found that I could leave Hyper-V Virtual Ethernet Adapter #2 at its defaults, but disabling the same 'send offload' settings in
Microsoft Network Adapter Multiplexor Driver instead had the same beneficial effect.

View attachment 23000

and disabling packet coalescing for the Wi-Fi adapter as you described.

View attachment 23001
Nice to know!
 

My Computer

System One

  • OS
    Windows 10 Pro + others in VHDs
    Computer type
    Laptop
    Manufacturer/Model
    ASUS Vivobook 14
    CPU
    I7
    Motherboard
    Yep, Laptop has one.
    Memory
    16 GB
    Graphics Card(s)
    Integrated Intel Iris XE
    Sound Card
    Realtek built in
    Monitor(s) Displays
    N/A
    Screen Resolution
    1920x1080
    Hard Drives
    1 TB Optane NVME SSD, 1 TB NVME SSD
    PSU
    Yep, got one
    Case
    Yep, got one
    Cooling
    Stella Artois
    Keyboard
    Built in
    Mouse
    Bluetooth , wired
    Internet Speed
    72 Mb/s :-(
    Browser
    Edge mostly
    Antivirus
    Defender
    Other Info
    TPM 2.0

Bree

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Even better, I'm now getting a faster transfer from host to another PC (even with a virtual switch present) than I did before without a virtual switch. Exactly the same transfer has gone up from 14.5MB/s to nearly 20MB/s.

1645908924742.png
 

My Computers

System One System Two

  • OS
    Windows 11 Home
    Computer type
    Laptop
    Manufacturer/Model
    Acer Aspire 3 A315-23
    CPU
    AMD Athlon Silver 3050U
    Memory
    8GB
    Graphics Card(s)
    Radeon Graphics
    Monitor(s) Displays
    laptop screen
    Screen Resolution
    1366x768 native resolution, up to 2560x1440 with Radeon Virtual Super Resolution
    Hard Drives
    1TB HDD
    Browser
    Edge, Firefox
    Antivirus
    Defender
    Other Info
    fully 'Windows 11 ready' laptop. Windows 10 C: partition migrated from my old unsupported 'main machine' then upgraded to 11. A test migration ran Insider builds for 2 months. When 11 was released on 5th October it was re-imaged back to 10 and was offered the upgrade in Windows Update on 20th October.


    My SYSTEM THREE is a Dell Latitude 5410, i7-10610U, 32GB RAM, 512GB ssd, Windows 11 Pro.
  • Operating System
    Windows 11 Pro
    Computer type
    Laptop
    Manufacturer/Model
    Dell Lattitude E4310
    CPU
    i5 M 520
    Motherboard
    0T6M8G
    Memory
    4GB
    Screen Resolution
    1366x768
    Hard Drives
    500GB HDD
    Browser
    Firefox, Edge
    Antivirus
    Defender
    Other Info
    unsupported machine: Legacy bios, MBR, TPM 1.2, upgraded from W10 to W11 using W10/W11 hybrid install media workaround.


    My SYSTEM THREE is a Dell Latitude 5410, i7-10610U, 32GB RAM, 512GB ssd, Windows 11 Pro.

jimbo45

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@Bree

Another solution -- add a USB wifi device to the VM with its own driver etc -- this will work and can have its own (fast) - depending on the wifi device) connection to the Host as well as to the Internet in general. These things are quite cheap and probably do better than relying on a "Virtual NIC" for Internet and LAN communication. Although I'm using KVM here the USB can be added as a "Physical USB" device in the VM's config and I know with HYPER-V it's also possible to attach a USB device directly to the VM. This will give full device speed capability which for a decent wifi device could be up in the Gb/s range.

(Physical wired connections are always better of course if you have dual LAN connections on your PC -- not normally available on laptops though --especially these days in the age of increasing minaturisation).

E.g :

Screenshot_20220228_084527.png
Cheers
jimbo
 

My Computer

System One

  • OS
    Windows XP,7,10,11 Linux Arch Linux
    Computer type
    PC/Desktop
    CPU
    2 X Intel i7

johnlgalt

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Hi @Bree, fear not!

See post I made a while back - this is a common issue and the two fixes here should sort it (my wifi adapter is same as yours). Actually issue dates back to W10 at least, and possibly W8.


Fix 1 - on wifi adapter
Fix 2 on hyper-v adapter (not sure if 1st two screens are essential but I would do them anyway)
Last two screens are required.

Thank you! That works :thumbsup:

I found that I could leave Hyper-V Virtual Ethernet Adapter #2 at its defaults, but disabling the same 'send offload' settings in
Microsoft Network Adapter Multiplexor Driver instead had the same beneficial effect.



and disabling packet coalescing for the Wi-Fi adapter as you described.

I've never thought to really explore this, but it makes sense. I wonder, though, if there are relevant fixes for pure wired connections? Last time I had multiple VMs for the classes I taught they had several virtual switches configured for various things, and during that time I do recall my connections speeds seeming to be a lot slower than they should be.

I'll do some exploring - maybe I can figure out the relevant settings, if they exist, for my NICs.

@Bree

Another solution -- add a USB wifi device to the VM with its own driver etc -- this will work and can have its own (fast) - depending on the wifi device) connection to the Host as well as to the Internet in general. These things are quite cheap and probably do better than relying on a "Virtual NIC" for Internet and LAN communication. Although I'm using KVM here the USB can be added as a "Physical USB" device in the VM's config and I know with HYPER-V it's also possible to attach a USB device directly to the VM. This will give full device speed capability which for a decent wifi device could be up in the Gb/s range.

(Physical wired connections are always better of course if you have dual LAN connections on your PC -- not normally available on laptops though --especially these days in the age of increasing minaturisation).

E.g :


Cheers
jimbo

Great point.
 

My Computers

System One System Two

  • OS
    Windows 11 21H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    HomeBrew
    CPU
    AMD Ryzen 9 3950X
    Motherboard
    MSI MEG X570 GODLIKE
    Memory
    4 * Corsair Vengeance 32 GB 3600 MHz
    Graphics Card(s)
    EVGA GeForce RTX 3080 Ti XC3 ULTRA GAMING (12G-P5-3955-KR)
    Sound Card
    Realtek® ALC1220 Codec
    Monitor(s) Displays
    Eve Spectrum ES07D02 280 Hz QHD | Eve Spectrum ES07D03 4K Gaming Monitor
    Screen Resolution
    1440p | 4k
    Hard Drives
    3x Samsung 980 Pro NVMe PCIe 4 M.2 2 TB SSD (MZ-V8P2T0B/AM)
    PSU
    PC Power & Cooling’s Silencer Series 1050 Watt, 80 Plus Platinum
    Case
    Fractal Design Define 7 XL Dark ATX Full Tower Case
    Cooling
    ZXT KRAKEN Z73 73.11 CFM Liquid CPU Cooler (3x 120 mm push top) + Air 3x 140mm case fans (pull front) + 1x 120 mm (push back) and 1 x 120 mm (pull bottom)
    Keyboard
    SteelSeries Apex Pro Wired Gaming Keyboard
    Mouse
    Logitech MX Master 3 for Business
    Internet Speed
    Logitech MX Master 3 for Business
    Browser
    Nightly (default) + Firefox (stable),Chrome, Edge/ß/Dev/Canary
    Antivirus
    Defender
  • Operating System
    Windows 10 x64 Pro build 21H1
    Computer type
    Laptop
    Manufacturer/Model
    Dell Latitude E5470
    CPU
    Intel(R) Core(TM) i5-6300U CPU @ 2.40GHz, 2501 Mhz, 2 Core(s), 4 Logical Processor(s)
    Motherboard
    Dell
    Memory
    16 GB
    Graphics card(s)
    Intel(R) HD Graphics 520
    Sound Card
    Intel(R) HD Graphics 520 + RealTek Audio
    Monitor(s) Displays
    Dell laptop display 15"
    Screen Resolution
    1920 * 1080
    Hard Drives
    Toshiba 128GB M.2 22300 drive
    INTEL Cherryvill 520 Series SSDSC2CW180A 180 GB SATA III SSD
    PSU
    Dell
    Case
    Dell
    Cooling
    Dell
    Mouse
    Logitech MX Master (shared) | Dell TouchPad
    Keyboard
    Dell
    Internet Speed
    AT&T LightSpeed Gigabit Duplex
    Browser
    Edge Chromium | Chrome | Firefox Nightly | Brave
    Antivirus
    Defender + MB4

Bree

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I've never thought to really explore this, but it makes sense. I wonder, though, if there are relevant fixes for pure wired connections?

...I'll do some exploring - maybe I can figure out the relevant settings, if they exist, for my NICs.
I don't see why not, though for me it would be particularly awkward to use a wired connection. Good luck, I'll be interested to see what what you find....
 

My Computers

System One System Two

  • OS
    Windows 11 Home
    Computer type
    Laptop
    Manufacturer/Model
    Acer Aspire 3 A315-23
    CPU
    AMD Athlon Silver 3050U
    Memory
    8GB
    Graphics Card(s)
    Radeon Graphics
    Monitor(s) Displays
    laptop screen
    Screen Resolution
    1366x768 native resolution, up to 2560x1440 with Radeon Virtual Super Resolution
    Hard Drives
    1TB HDD
    Browser
    Edge, Firefox
    Antivirus
    Defender
    Other Info
    fully 'Windows 11 ready' laptop. Windows 10 C: partition migrated from my old unsupported 'main machine' then upgraded to 11. A test migration ran Insider builds for 2 months. When 11 was released on 5th October it was re-imaged back to 10 and was offered the upgrade in Windows Update on 20th October.


    My SYSTEM THREE is a Dell Latitude 5410, i7-10610U, 32GB RAM, 512GB ssd, Windows 11 Pro.
  • Operating System
    Windows 11 Pro
    Computer type
    Laptop
    Manufacturer/Model
    Dell Lattitude E4310
    CPU
    i5 M 520
    Motherboard
    0T6M8G
    Memory
    4GB
    Screen Resolution
    1366x768
    Hard Drives
    500GB HDD
    Browser
    Firefox, Edge
    Antivirus
    Defender
    Other Info
    unsupported machine: Legacy bios, MBR, TPM 1.2, upgraded from W10 to W11 using W10/W11 hybrid install media workaround.


    My SYSTEM THREE is a Dell Latitude 5410, i7-10610U, 32GB RAM, 512GB ssd, Windows 11 Pro.

johnlgalt

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I don't see why not, though for me it would be particularly awkward to use a wired connection. Good luck, I'll be interested to see what what you find....

Lol yeah. My desktop has 3 wired and 1 wireless connection. Wired wins. My laptop, when sitting on my desk, also enjoys the benefits of a wired connection.

Most of my other devices are wireless, though.
 

My Computers

System One System Two

  • OS
    Windows 11 21H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    HomeBrew
    CPU
    AMD Ryzen 9 3950X
    Motherboard
    MSI MEG X570 GODLIKE
    Memory
    4 * Corsair Vengeance 32 GB 3600 MHz
    Graphics Card(s)
    EVGA GeForce RTX 3080 Ti XC3 ULTRA GAMING (12G-P5-3955-KR)
    Sound Card
    Realtek® ALC1220 Codec
    Monitor(s) Displays
    Eve Spectrum ES07D02 280 Hz QHD | Eve Spectrum ES07D03 4K Gaming Monitor
    Screen Resolution
    1440p | 4k
    Hard Drives
    3x Samsung 980 Pro NVMe PCIe 4 M.2 2 TB SSD (MZ-V8P2T0B/AM)
    PSU
    PC Power & Cooling’s Silencer Series 1050 Watt, 80 Plus Platinum
    Case
    Fractal Design Define 7 XL Dark ATX Full Tower Case
    Cooling
    ZXT KRAKEN Z73 73.11 CFM Liquid CPU Cooler (3x 120 mm push top) + Air 3x 140mm case fans (pull front) + 1x 120 mm (push back) and 1 x 120 mm (pull bottom)
    Keyboard
    SteelSeries Apex Pro Wired Gaming Keyboard
    Mouse
    Logitech MX Master 3 for Business
    Internet Speed
    Logitech MX Master 3 for Business
    Browser
    Nightly (default) + Firefox (stable),Chrome, Edge/ß/Dev/Canary
    Antivirus
    Defender
  • Operating System
    Windows 10 x64 Pro build 21H1
    Computer type
    Laptop
    Manufacturer/Model
    Dell Latitude E5470
    CPU
    Intel(R) Core(TM) i5-6300U CPU @ 2.40GHz, 2501 Mhz, 2 Core(s), 4 Logical Processor(s)
    Motherboard
    Dell
    Memory
    16 GB
    Graphics card(s)
    Intel(R) HD Graphics 520
    Sound Card
    Intel(R) HD Graphics 520 + RealTek Audio
    Monitor(s) Displays
    Dell laptop display 15"
    Screen Resolution
    1920 * 1080
    Hard Drives
    Toshiba 128GB M.2 22300 drive
    INTEL Cherryvill 520 Series SSDSC2CW180A 180 GB SATA III SSD
    PSU
    Dell
    Case
    Dell
    Cooling
    Dell
    Mouse
    Logitech MX Master (shared) | Dell TouchPad
    Keyboard
    Dell
    Internet Speed
    AT&T LightSpeed Gigabit Duplex
    Browser
    Edge Chromium | Chrome | Firefox Nightly | Brave
    Antivirus
    Defender + MB4

johnlgalt

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I checked - my 3 wired NICs also had some sort of coalescing settings enabled. I killed them. Will test with VMs later tonight.
 

My Computers

System One System Two

  • OS
    Windows 11 21H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    HomeBrew
    CPU
    AMD Ryzen 9 3950X
    Motherboard
    MSI MEG X570 GODLIKE
    Memory
    4 * Corsair Vengeance 32 GB 3600 MHz
    Graphics Card(s)
    EVGA GeForce RTX 3080 Ti XC3 ULTRA GAMING (12G-P5-3955-KR)
    Sound Card
    Realtek® ALC1220 Codec
    Monitor(s) Displays
    Eve Spectrum ES07D02 280 Hz QHD | Eve Spectrum ES07D03 4K Gaming Monitor
    Screen Resolution
    1440p | 4k
    Hard Drives
    3x Samsung 980 Pro NVMe PCIe 4 M.2 2 TB SSD (MZ-V8P2T0B/AM)
    PSU
    PC Power & Cooling’s Silencer Series 1050 Watt, 80 Plus Platinum
    Case
    Fractal Design Define 7 XL Dark ATX Full Tower Case
    Cooling
    ZXT KRAKEN Z73 73.11 CFM Liquid CPU Cooler (3x 120 mm push top) + Air 3x 140mm case fans (pull front) + 1x 120 mm (push back) and 1 x 120 mm (pull bottom)
    Keyboard
    SteelSeries Apex Pro Wired Gaming Keyboard
    Mouse
    Logitech MX Master 3 for Business
    Internet Speed
    Logitech MX Master 3 for Business
    Browser
    Nightly (default) + Firefox (stable),Chrome, Edge/ß/Dev/Canary
    Antivirus
    Defender
  • Operating System
    Windows 10 x64 Pro build 21H1
    Computer type
    Laptop
    Manufacturer/Model
    Dell Latitude E5470
    CPU
    Intel(R) Core(TM) i5-6300U CPU @ 2.40GHz, 2501 Mhz, 2 Core(s), 4 Logical Processor(s)
    Motherboard
    Dell
    Memory
    16 GB
    Graphics card(s)
    Intel(R) HD Graphics 520
    Sound Card
    Intel(R) HD Graphics 520 + RealTek Audio
    Monitor(s) Displays
    Dell laptop display 15"
    Screen Resolution
    1920 * 1080
    Hard Drives
    Toshiba 128GB M.2 22300 drive
    INTEL Cherryvill 520 Series SSDSC2CW180A 180 GB SATA III SSD
    PSU
    Dell
    Case
    Dell
    Cooling
    Dell
    Mouse
    Logitech MX Master (shared) | Dell TouchPad
    Keyboard
    Dell
    Internet Speed
    AT&T LightSpeed Gigabit Duplex
    Browser
    Edge Chromium | Chrome | Firefox Nightly | Brave
    Antivirus
    Defender + MB4

cereberus

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Windows 10 Pro + others in VHDs
I checked - my 3 wired NICs also had some sort of coalescing settings enabled. I killed them. Will test with VMs later tonight.
Yeah - I as I said in a post I linked to, I had same issues on another broadcom NIC, and killing coalescing on wifi solved issue - I cannot say with wired versions though.
 

My Computer

System One

  • OS
    Windows 10 Pro + others in VHDs
    Computer type
    Laptop
    Manufacturer/Model
    ASUS Vivobook 14
    CPU
    I7
    Motherboard
    Yep, Laptop has one.
    Memory
    16 GB
    Graphics Card(s)
    Integrated Intel Iris XE
    Sound Card
    Realtek built in
    Monitor(s) Displays
    N/A
    Screen Resolution
    1920x1080
    Hard Drives
    1 TB Optane NVME SSD, 1 TB NVME SSD
    PSU
    Yep, got one
    Case
    Yep, got one
    Cooling
    Stella Artois
    Keyboard
    Built in
    Mouse
    Bluetooth , wired
    Internet Speed
    72 Mb/s :-(
    Browser
    Edge mostly
    Antivirus
    Defender
    Other Info
    TPM 2.0

jimbo45

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Hafnarfjörður IS
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If you don't mind a bit of "messing around" -- another way of getting a "Wired" Nic even on hardware that doesn't have one is to use a really (and really "el-cheapo" usb->lan adapter on the laptop, then a SHORT bit of LAN cable into a cheap unmanaged switch, then another short piece of lan cable to a multi-port "Wifi extender" - the modern wifi extenders can theoretically give over 1 Gbps speeds. I have several devices that don't have wireless and I don't want LAN cables all over the place -- the switch and Wifi extender is a perfect solution -- especially as you can set the device to "Full duplex" -- Wifi usually operates at "half duplex" by default.

For some people this might be a bit OTT but it works really well - In a "man shed" in y back garden over 150 metres from the router in the house I'm still getting 600 Mbps using this method. Using classic Wifi on some gear I'd be down to the classic 54mbps standard and real transfer would be a lot slower too.

Cheers
jimbo
 

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cereberus

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@Bree

Another solution -- add a USB wifi device to the VM with its own driver etc -- this will work and can have its own (fast) - depending on the wifi device) connection to the Host as well as to the Internet in general. These things are quite cheap and probably do better than relying on a "Virtual NIC" for Internet and LAN communication. Although I'm using KVM here the USB can be added as a "Physical USB" device in the VM's config and I know with HYPER-V it's also possible to attach a USB device directly to the VM. This will give full device speed capability which for a decent wifi device could be up in the Gb/s range.

(Physical wired connections are always better of course if you have dual LAN connections on your PC -- not normally available on laptops though --especially these days in the age of increasing minaturisation).

E.g :

View attachment 23110
Cheers
jimbo
I love the way you always seem to make a simple solution complicated (in pursuit of best performance of course) - l would hate to employ you as a decorator in my house. To put up a picture, I bet you would knock the wall down, put the picture in a frame, and rebuild the wall, sealing the frame in place, knowing it will never fall down:lmao:.

PS only kidding for avoidance of doubt.
 

My Computer

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    Yep, Laptop has one.
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jimbo45

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I love the way you always seem to make a simple solution complicated (in pursuit of best performance of course) - l would hate to employ you as a decorator in my house. To put up a picture, I bet you would knock the wall down, put the picture in a frame, and rebuild the wall, sealing the frame in place, knowing it will never fall down:lmao:.

PS only kidding for avoidance of doubt.
Hi there
maybe I've been drinking too much of this incredible product from Scotland at a mere 1800 EUR a bottle !!!!! -- Very rare but no B/S-- this edition really is around 1800 EUR a bottle if you can find it any more !!!!

Screenshot_20220305_234347.png

Cheers
!!!!!
 
Last edited:

My Computer

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    Windows XP,7,10,11 Linux Arch Linux
    Computer type
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