Creating an external virtual switch on Hyper-V causes host to experience very slow networking
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1
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I've set up my Hyper-V environment (Win 10 Pro 64-bit, update 1809) to have an external virtual switch bound to my wifi adapter and shared with the host OS. I've used this virtual switch with my Debian guest VM to access the internet and the local network.
This was fine up until a couple of days ago when my host's network suddenly dropped network throughput from something like 350Mbps to 8Mbps.
Removing the external switch causes the slowdown to go away completely.
I've tried disabling VMQ, even though my wireless card driver doesn't support it (it's the built-in Qualcomm wifi chip on an Asus Strix z270e motherboard), but that didn't change anything.
Is there a way to have an external switch that shares the connection with the host without these problems, or a resource I can study to figure out how to get around these problems? I need the VM to be exposed to the local network, since I connect to it via test devices connected to my LAN.
Update 1
The answer provided here does describe my situation correctly, and I've tried the solution by making applying the following steps:
- creating an Internal virtual switch,
- selecting the internal virtual switch and my wifi NIC in the network control panel and selecting "create bridge" from the context menu.
This resulted in the same slowdown as before with an external virtual switch.
External links
https://win10.guru/hyper-v-external-switches-killing-networking-in-insider-builds
networking virtualization hyper-v windows-10
asked Oct 31 at 23:15
Klemen Slavič
13311
migrated from serverfault.com Oct 31 at 23:57
This question came from our site for system and network administrators.
add a comment |
up vote
1
down vote
favorite
I've set up my Hyper-V environment (Win 10 Pro 64-bit, update 1809) to have an external virtual switch bound to my wifi adapter and shared with the host OS. I've used this virtual switch with my Debian guest VM to access the internet and the local network.
This was fine up until a couple of days ago when my host's network suddenly dropped network throughput from something like 350Mbps to 8Mbps.
Removing the external switch causes the slowdown to go away completely.
I've tried disabling VMQ, even though my wireless card driver doesn't support it (it's the built-in Qualcomm wifi chip on an Asus Strix z270e motherboard), but that didn't change anything.
Is there a way to have an external switch that shares the connection with the host without these problems, or a resource I can study to figure out how to get around these problems? I need the VM to be exposed to the local network, since I connect to it via test devices connected to my LAN.
Update 1
The answer provided here does describe my situation correctly, and I've tried the solution by making applying the following steps:
- creating an Internal virtual switch,
- selecting the internal virtual switch and my wifi NIC in the network control panel and selecting "create bridge" from the context menu.
This resulted in the same slowdown as before with an external virtual switch.
External links
https://win10.guru/hyper-v-external-switches-killing-networking-in-insider-builds
networking virtualization hyper-v windows-10
asked Oct 31 at 23:15
Klemen Slavič
13311
migrated from serverfault.com Oct 31 at 23:57
This question came from our site for system and network administrators.
Research TCP Offloading virtual machine performance issues.
– Appleoddity
Oct 31 at 23:21
I don't think that applies to my scenario, as the Qualcomm NIC driver doesn't support it. I've also disabled IPSec offloading in the network adapter on the host, and it doesn't make a lick of difference.
– Klemen Slavič
Oct 31 at 23:39
add a comment |
up vote
1
down vote
favorite
up vote
1
down vote
favorite
I've set up my Hyper-V environment (Win 10 Pro 64-bit, update 1809) to have an external virtual switch bound to my wifi adapter and shared with the host OS. I've used this virtual switch with my Debian guest VM to access the internet and the local network.
This was fine up until a couple of days ago when my host's network suddenly dropped network throughput from something like 350Mbps to 8Mbps.
Removing the external switch causes the slowdown to go away completely.
I've tried disabling VMQ, even though my wireless card driver doesn't support it (it's the built-in Qualcomm wifi chip on an Asus Strix z270e motherboard), but that didn't change anything.
Is there a way to have an external switch that shares the connection with the host without these problems, or a resource I can study to figure out how to get around these problems? I need the VM to be exposed to the local network, since I connect to it via test devices connected to my LAN.
Update 1
The answer provided here does describe my situation correctly, and I've tried the solution by making applying the following steps:
- creating an Internal virtual switch,
- selecting the internal virtual switch and my wifi NIC in the network control panel and selecting "create bridge" from the context menu.
This resulted in the same slowdown as before with an external virtual switch.
External links
https://win10.guru/hyper-v-external-switches-killing-networking-in-insider-builds
networking virtualization hyper-v windows-10
asked Oct 31 at 23:15
Klemen Slavič
13311
I've set up my Hyper-V environment (Win 10 Pro 64-bit, update 1809) to have an external virtual switch bound to my wifi adapter and shared with the host OS. I've used this virtual switch with my Debian guest VM to access the internet and the local network.
This was fine up until a couple of days ago when my host's network suddenly dropped network throughput from something like 350Mbps to 8Mbps.
Removing the external switch causes the slowdown to go away completely.
I've tried disabling VMQ, even though my wireless card driver doesn't support it (it's the built-in Qualcomm wifi chip on an Asus Strix z270e motherboard), but that didn't change anything.
Is there a way to have an external switch that shares the connection with the host without these problems, or a resource I can study to figure out how to get around these problems? I need the VM to be exposed to the local network, since I connect to it via test devices connected to my LAN.
Update 1
The answer provided here does describe my situation correctly, and I've tried the solution by making applying the following steps:
- creating an Internal virtual switch,
- selecting the internal virtual switch and my wifi NIC in the network control panel and selecting "create bridge" from the context menu.
This resulted in the same slowdown as before with an external virtual switch.
External links
https://win10.guru/hyper-v-external-switches-killing-networking-in-insider-builds
networking virtualization hyper-v windows-10
networking virtualization hyper-v windows-10
asked Oct 31 at 23:15
Klemen Slavič
13311
asked Oct 31 at 23:15
Klemen Slavič
13311
edited Nov 1 at 0:24
asked Oct 31 at 23:15
Klemen Slavič
13311
asked Oct 31 at 23:15
Klemen Slavič
13311
asked Oct 31 at 23:15
Klemen Slavič
13311
13311
migrated from serverfault.com Oct 31 at 23:57
This question came from our site for system and network administrators.
migrated from serverfault.com Oct 31 at 23:57
This question came from our site for system and network administrators.
Research TCP Offloading virtual machine performance issues.
– Appleoddity
Oct 31 at 23:21
I don't think that applies to my scenario, as the Qualcomm NIC driver doesn't support it. I've also disabled IPSec offloading in the network adapter on the host, and it doesn't make a lick of difference.
– Klemen Slavič
Oct 31 at 23:39
add a comment |
Research TCP Offloading virtual machine performance issues.
– Appleoddity
Oct 31 at 23:21
I don't think that applies to my scenario, as the Qualcomm NIC driver doesn't support it. I've also disabled IPSec offloading in the network adapter on the host, and it doesn't make a lick of difference.
– Klemen Slavič
Oct 31 at 23:39
Research TCP Offloading virtual machine performance issues.
– Appleoddity
Oct 31 at 23:21
Research TCP Offloading virtual machine performance issues.
– Appleoddity
Oct 31 at 23:21
I don't think that applies to my scenario, as the Qualcomm NIC driver doesn't support it. I've also disabled IPSec offloading in the network adapter on the host, and it doesn't make a lick of difference.
– Klemen Slavič
Oct 31 at 23:39
I don't think that applies to my scenario, as the Qualcomm NIC driver doesn't support it. I've also disabled IPSec offloading in the network adapter on the host, and it doesn't make a lick of difference.
– Klemen Slavič
Oct 31 at 23:39
add a comment |
3 Answers
3
active
oldest
votes
up vote
1
down vote
I don't know if my suggestion can satisfy what you're really asking but what I've done is instead of using external switches I create an internal one and configure it as a NAT virtual switch..that way I don't have to deal with external vSwitches.. if what you want is to provide internet access to guest VMs it works just fine. Here's a link in case you want to implement it..it's relatively easy. Hope that helps!
answered Oct 31 at 23:25
Humberto Castellon
1113
I would like to avoid having to do port forwarding from my host's IP if possible, a separate IP for the guest VM on the local network is kind of a must. At this point, it would be easier for me to just migrate to VirtualBox if there isn't an alternative.
– Klemen Slavič
Oct 31 at 23:31
add a comment |
up vote
1
down vote
So, I've been fighting this issue myself for a few hours on my nice new laptop, and I believe I've found the combination of settings that seems to have restored most of my connectivity.
Since I have an Intel NIC I have no idea if this will help, but I'm curious and would love for you to try if you haven't gotten it sorted already.
Problem no.1: Slow download
Disable coalescing on the Wifi-card. This completely restored my download speed and resolved issues I was seeing with intermittent connectivity in the host OS and on VMs.
Problem no.2: Slow upload
Disable Large Send Offload on the Virtual adapter representing the external switch. In my case called vEthernet(WAN)
answered Nov 15 at 12:51
Mike
111
add a comment |
up vote
1
down vote
Disabling Large Send Offload Version 2 in the properties of the external vEthernet adapter helped me with this problem.
answered Nov 19 at 6:51
Avi
112
New contributor
Avi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
1
down vote
I don't know if my suggestion can satisfy what you're really asking but what I've done is instead of using external switches I create an internal one and configure it as a NAT virtual switch..that way I don't have to deal with external vSwitches.. if what you want is to provide internet access to guest VMs it works just fine. Here's a link in case you want to implement it..it's relatively easy. Hope that helps!
answered Oct 31 at 23:25
Humberto Castellon
1113
I would like to avoid having to do port forwarding from my host's IP if possible, a separate IP for the guest VM on the local network is kind of a must. At this point, it would be easier for me to just migrate to VirtualBox if there isn't an alternative.
– Klemen Slavič
Oct 31 at 23:31
add a comment |
up vote
1
down vote
I don't know if my suggestion can satisfy what you're really asking but what I've done is instead of using external switches I create an internal one and configure it as a NAT virtual switch..that way I don't have to deal with external vSwitches.. if what you want is to provide internet access to guest VMs it works just fine. Here's a link in case you want to implement it..it's relatively easy. Hope that helps!
answered Oct 31 at 23:25
Humberto Castellon
1113
I would like to avoid having to do port forwarding from my host's IP if possible, a separate IP for the guest VM on the local network is kind of a must. At this point, it would be easier for me to just migrate to VirtualBox if there isn't an alternative.
– Klemen Slavič
Oct 31 at 23:31
add a comment |
up vote
1
down vote
up vote
1
down vote
I don't know if my suggestion can satisfy what you're really asking but what I've done is instead of using external switches I create an internal one and configure it as a NAT virtual switch..that way I don't have to deal with external vSwitches.. if what you want is to provide internet access to guest VMs it works just fine. Here's a link in case you want to implement it..it's relatively easy. Hope that helps!
answered Oct 31 at 23:25
Humberto Castellon
1113
I don't know if my suggestion can satisfy what you're really asking but what I've done is instead of using external switches I create an internal one and configure it as a NAT virtual switch..that way I don't have to deal with external vSwitches.. if what you want is to provide internet access to guest VMs it works just fine. Here's a link in case you want to implement it..it's relatively easy. Hope that helps!
answered Oct 31 at 23:25
Humberto Castellon
1113
answered Oct 31 at 23:25
Humberto Castellon
1113
answered Oct 31 at 23:25
Humberto Castellon
1113
answered Oct 31 at 23:25
Humberto Castellon
1113
1113
I would like to avoid having to do port forwarding from my host's IP if possible, a separate IP for the guest VM on the local network is kind of a must. At this point, it would be easier for me to just migrate to VirtualBox if there isn't an alternative.
– Klemen Slavič
Oct 31 at 23:31
add a comment |
I would like to avoid having to do port forwarding from my host's IP if possible, a separate IP for the guest VM on the local network is kind of a must. At this point, it would be easier for me to just migrate to VirtualBox if there isn't an alternative.
– Klemen Slavič
Oct 31 at 23:31
I would like to avoid having to do port forwarding from my host's IP if possible, a separate IP for the guest VM on the local network is kind of a must. At this point, it would be easier for me to just migrate to VirtualBox if there isn't an alternative.
– Klemen Slavič
Oct 31 at 23:31
I would like to avoid having to do port forwarding from my host's IP if possible, a separate IP for the guest VM on the local network is kind of a must. At this point, it would be easier for me to just migrate to VirtualBox if there isn't an alternative.
– Klemen Slavič
Oct 31 at 23:31
add a comment |
up vote
1
down vote
So, I've been fighting this issue myself for a few hours on my nice new laptop, and I believe I've found the combination of settings that seems to have restored most of my connectivity.
Since I have an Intel NIC I have no idea if this will help, but I'm curious and would love for you to try if you haven't gotten it sorted already.
Problem no.1: Slow download
Disable coalescing on the Wifi-card. This completely restored my download speed and resolved issues I was seeing with intermittent connectivity in the host OS and on VMs.
Problem no.2: Slow upload
Disable Large Send Offload on the Virtual adapter representing the external switch. In my case called vEthernet(WAN)
answered Nov 15 at 12:51
Mike
111
add a comment |
up vote
1
down vote
So, I've been fighting this issue myself for a few hours on my nice new laptop, and I believe I've found the combination of settings that seems to have restored most of my connectivity.
Since I have an Intel NIC I have no idea if this will help, but I'm curious and would love for you to try if you haven't gotten it sorted already.
Problem no.1: Slow download
Disable coalescing on the Wifi-card. This completely restored my download speed and resolved issues I was seeing with intermittent connectivity in the host OS and on VMs.
Problem no.2: Slow upload
Disable Large Send Offload on the Virtual adapter representing the external switch. In my case called vEthernet(WAN)
answered Nov 15 at 12:51
Mike
111
add a comment |
up vote
1
down vote
up vote
1
down vote
So, I've been fighting this issue myself for a few hours on my nice new laptop, and I believe I've found the combination of settings that seems to have restored most of my connectivity.
Since I have an Intel NIC I have no idea if this will help, but I'm curious and would love for you to try if you haven't gotten it sorted already.
Problem no.1: Slow download
Disable coalescing on the Wifi-card. This completely restored my download speed and resolved issues I was seeing with intermittent connectivity in the host OS and on VMs.
Problem no.2: Slow upload
Disable Large Send Offload on the Virtual adapter representing the external switch. In my case called vEthernet(WAN)
answered Nov 15 at 12:51
Mike
111
So, I've been fighting this issue myself for a few hours on my nice new laptop, and I believe I've found the combination of settings that seems to have restored most of my connectivity.
Since I have an Intel NIC I have no idea if this will help, but I'm curious and would love for you to try if you haven't gotten it sorted already.
Problem no.1: Slow download
Disable coalescing on the Wifi-card. This completely restored my download speed and resolved issues I was seeing with intermittent connectivity in the host OS and on VMs.
Problem no.2: Slow upload
Disable Large Send Offload on the Virtual adapter representing the external switch. In my case called vEthernet(WAN)
answered Nov 15 at 12:51
Mike
111
answered Nov 15 at 12:51
Mike
111
answered Nov 15 at 12:51
Mike
111
answered Nov 15 at 12:51
Mike
111
111
add a comment |
add a comment |
up vote
1
down vote
Disabling Large Send Offload Version 2 in the properties of the external vEthernet adapter helped me with this problem.
answered Nov 19 at 6:51
Avi
112
New contributor
Avi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
up vote
1
down vote
Disabling Large Send Offload Version 2 in the properties of the external vEthernet adapter helped me with this problem.
answered Nov 19 at 6:51
Avi
112
New contributor
Avi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
up vote
1
down vote
up vote
1
down vote
Disabling Large Send Offload Version 2 in the properties of the external vEthernet adapter helped me with this problem.
answered Nov 19 at 6:51
Avi
112
New contributor
Avi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Disabling Large Send Offload Version 2 in the properties of the external vEthernet adapter helped me with this problem.
answered Nov 19 at 6:51
Avi
112
New contributor
Avi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered Nov 19 at 6:51
Avi
112
New contributor
Avi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered Nov 19 at 6:51
Avi
112
answered Nov 19 at 6:51
Avi
112
112
New contributor
Avi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Avi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Avi is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
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Research TCP Offloading virtual machine performance issues.
– Appleoddity
Oct 31 at 23:21
I don't think that applies to my scenario, as the Qualcomm NIC driver doesn't support it. I've also disabled IPSec offloading in the network adapter on the host, and it doesn't make a lick of difference.
– Klemen Slavič
Oct 31 at 23:39