Extremely slow NAT within a VMWare ESXi host using Linux VMsfaking NAT with a VMware distributed switch across multiple hostsHow to route public static IP to a virtual machine on a vmware ESXi host?Create separate Network for testing purposeESXi network setup for isolated internal virtual machinesCreating a bridged network in ESXi VSphere using VSphere clientLinux Routing with two NICs (LAN vs Internet) with NAT and bridging for VMsESXi network setup for VMs which connect to the Internet through PfSenseHow to make a linux VM working as a routerVMware ESXi VM bridgecommon Network on 2 dedicated ESXi serversCan only access the gateway at the end of my ssh ethernet tunnel why?
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Extremely slow NAT within a VMWare ESXi host using Linux VMs
faking NAT with a VMware distributed switch across multiple hostsHow to route public static IP to a virtual machine on a vmware ESXi host?Create separate Network for testing purposeESXi network setup for isolated internal virtual machinesCreating a bridged network in ESXi VSphere using VSphere clientLinux Routing with two NICs (LAN vs Internet) with NAT and bridging for VMsESXi network setup for VMs which connect to the Internet through PfSenseHow to make a linux VM working as a routerVMware ESXi VM bridgecommon Network on 2 dedicated ESXi serversCan only access the gateway at the end of my ssh ethernet tunnel why?
I have a VMWare ESXi host attached to a fast network.
The host runs two virtual machines:
- Gateway
- Client
The gateway has two network interfaces, one that's bridged to the external network (vSwitch0), and one that's bridged to the server's internal network (vSwitch1). It has firehol installed and it's doing NAT and port forwards for the internal client machine.
The client machine has an internal IP and connects via the gateway to the internet. Everything works well, but transfer speeds from the client to the internet is very slow, less than 30kB/s. Tranfers both to and from the gateway to the internet is fast (100Mbit), and so is traffic from the internet to the client. I've tried doing a network dump to see where the problem could be, but didn't find anything. Everything just looks like the line is slow.
Also, the transfer speed between the two VMs is almost a full gigabit. So that's not the problem either. Both machines are running Debian Lenny with no special modifications. I'm using open-vm-tools for VMXNET paravirtualized networking.
linux debian router nat vmware-esxi
asked Mar 2 '10 at 23:23
tstmtstm
2881413
add a comment |
I have a VMWare ESXi host attached to a fast network.
The host runs two virtual machines:
- Gateway
- Client
The gateway has two network interfaces, one that's bridged to the external network (vSwitch0), and one that's bridged to the server's internal network (vSwitch1). It has firehol installed and it's doing NAT and port forwards for the internal client machine.
The client machine has an internal IP and connects via the gateway to the internet. Everything works well, but transfer speeds from the client to the internet is very slow, less than 30kB/s. Tranfers both to and from the gateway to the internet is fast (100Mbit), and so is traffic from the internet to the client. I've tried doing a network dump to see where the problem could be, but didn't find anything. Everything just looks like the line is slow.
Also, the transfer speed between the two VMs is almost a full gigabit. So that's not the problem either. Both machines are running Debian Lenny with no special modifications. I'm using open-vm-tools for VMXNET paravirtualized networking.
linux debian router nat vmware-esxi
asked Mar 2 '10 at 23:23
tstmtstm
2881413
add a comment |
I have a VMWare ESXi host attached to a fast network.
The host runs two virtual machines:
- Gateway
- Client
The gateway has two network interfaces, one that's bridged to the external network (vSwitch0), and one that's bridged to the server's internal network (vSwitch1). It has firehol installed and it's doing NAT and port forwards for the internal client machine.
The client machine has an internal IP and connects via the gateway to the internet. Everything works well, but transfer speeds from the client to the internet is very slow, less than 30kB/s. Tranfers both to and from the gateway to the internet is fast (100Mbit), and so is traffic from the internet to the client. I've tried doing a network dump to see where the problem could be, but didn't find anything. Everything just looks like the line is slow.
Also, the transfer speed between the two VMs is almost a full gigabit. So that's not the problem either. Both machines are running Debian Lenny with no special modifications. I'm using open-vm-tools for VMXNET paravirtualized networking.
linux debian router nat vmware-esxi
asked Mar 2 '10 at 23:23
tstmtstm
2881413
I have a VMWare ESXi host attached to a fast network.
The host runs two virtual machines:
- Gateway
- Client
The gateway has two network interfaces, one that's bridged to the external network (vSwitch0), and one that's bridged to the server's internal network (vSwitch1). It has firehol installed and it's doing NAT and port forwards for the internal client machine.
The client machine has an internal IP and connects via the gateway to the internet. Everything works well, but transfer speeds from the client to the internet is very slow, less than 30kB/s. Tranfers both to and from the gateway to the internet is fast (100Mbit), and so is traffic from the internet to the client. I've tried doing a network dump to see where the problem could be, but didn't find anything. Everything just looks like the line is slow.
Also, the transfer speed between the two VMs is almost a full gigabit. So that's not the problem either. Both machines are running Debian Lenny with no special modifications. I'm using open-vm-tools for VMXNET paravirtualized networking.
linux debian router nat vmware-esxi
linux debian router nat vmware-esxi
asked Mar 2 '10 at 23:23
tstmtstm
2881413
asked Mar 2 '10 at 23:23
tstmtstm
2881413
asked Mar 2 '10 at 23:23
tstmtstm
2881413
asked Mar 2 '10 at 23:23
tstmtstm
2881413
asked Mar 2 '10 at 23:23
tstmtstm
2881413
2881413
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
I found the solution to this problem.
For a completely internal network (that's not attached to any physical network interface) you need to disable TCP Segmentation Offloading from inside the OS.
It's a simple command:
ethtool -K <interface> tso off
After this command my transfer speeds went from 30kb/s to full 100Mbit.
answered Mar 4 '10 at 0:20
tstmtstm
2881413
Wow, thanks. I spent most of the afternoon trying to isolate my slow network issues. Once I finally figured out a physically backed vSwitch did not have this problem, I quickly found your answer. Awesome!
– darron
Jan 6 '11 at 0:05
add a comment |
Did you try using another type of virtual network card?
The E1000 emulation seems to work pretty good for me, maybe it's driver based?
answered Mar 2 '10 at 23:29
Alexandre NizouxAlexandre Nizoux
373313
Yes, I have tried both with e1000 and VMXNET
– tstm
Mar 2 '10 at 23:33
I tried installing Ubuntu Karmic as a testing client. I found out interesting things. When using "Flexible" as the network interface, the speeds are good in both directions. But with both e1000 and VMXNET3 it's extremely slow.
– tstm
Mar 3 '10 at 23:04
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
I found the solution to this problem.
For a completely internal network (that's not attached to any physical network interface) you need to disable TCP Segmentation Offloading from inside the OS.
It's a simple command:
ethtool -K <interface> tso off
After this command my transfer speeds went from 30kb/s to full 100Mbit.
answered Mar 4 '10 at 0:20
tstmtstm
2881413
Wow, thanks. I spent most of the afternoon trying to isolate my slow network issues. Once I finally figured out a physically backed vSwitch did not have this problem, I quickly found your answer. Awesome!
– darron
Jan 6 '11 at 0:05
add a comment |
I found the solution to this problem.
For a completely internal network (that's not attached to any physical network interface) you need to disable TCP Segmentation Offloading from inside the OS.
It's a simple command:
ethtool -K <interface> tso off
After this command my transfer speeds went from 30kb/s to full 100Mbit.
answered Mar 4 '10 at 0:20
tstmtstm
2881413
Wow, thanks. I spent most of the afternoon trying to isolate my slow network issues. Once I finally figured out a physically backed vSwitch did not have this problem, I quickly found your answer. Awesome!
– darron
Jan 6 '11 at 0:05
add a comment |
I found the solution to this problem.
For a completely internal network (that's not attached to any physical network interface) you need to disable TCP Segmentation Offloading from inside the OS.
It's a simple command:
ethtool -K <interface> tso off
After this command my transfer speeds went from 30kb/s to full 100Mbit.
answered Mar 4 '10 at 0:20
tstmtstm
2881413
I found the solution to this problem.
For a completely internal network (that's not attached to any physical network interface) you need to disable TCP Segmentation Offloading from inside the OS.
It's a simple command:
ethtool -K <interface> tso off
After this command my transfer speeds went from 30kb/s to full 100Mbit.
answered Mar 4 '10 at 0:20
tstmtstm
2881413
answered Mar 4 '10 at 0:20
tstmtstm
2881413
answered Mar 4 '10 at 0:20
tstmtstm
2881413
answered Mar 4 '10 at 0:20
tstmtstm
2881413
2881413
Wow, thanks. I spent most of the afternoon trying to isolate my slow network issues. Once I finally figured out a physically backed vSwitch did not have this problem, I quickly found your answer. Awesome!
– darron
Jan 6 '11 at 0:05
add a comment |
Wow, thanks. I spent most of the afternoon trying to isolate my slow network issues. Once I finally figured out a physically backed vSwitch did not have this problem, I quickly found your answer. Awesome!
– darron
Jan 6 '11 at 0:05
Wow, thanks. I spent most of the afternoon trying to isolate my slow network issues. Once I finally figured out a physically backed vSwitch did not have this problem, I quickly found your answer. Awesome!
– darron
Jan 6 '11 at 0:05
Wow, thanks. I spent most of the afternoon trying to isolate my slow network issues. Once I finally figured out a physically backed vSwitch did not have this problem, I quickly found your answer. Awesome!
– darron
Jan 6 '11 at 0:05
add a comment |
Did you try using another type of virtual network card?
The E1000 emulation seems to work pretty good for me, maybe it's driver based?
answered Mar 2 '10 at 23:29
Alexandre NizouxAlexandre Nizoux
373313
Yes, I have tried both with e1000 and VMXNET
– tstm
Mar 2 '10 at 23:33
I tried installing Ubuntu Karmic as a testing client. I found out interesting things. When using "Flexible" as the network interface, the speeds are good in both directions. But with both e1000 and VMXNET3 it's extremely slow.
– tstm
Mar 3 '10 at 23:04
add a comment |
Did you try using another type of virtual network card?
The E1000 emulation seems to work pretty good for me, maybe it's driver based?
answered Mar 2 '10 at 23:29
Alexandre NizouxAlexandre Nizoux
373313
Yes, I have tried both with e1000 and VMXNET
– tstm
Mar 2 '10 at 23:33
I tried installing Ubuntu Karmic as a testing client. I found out interesting things. When using "Flexible" as the network interface, the speeds are good in both directions. But with both e1000 and VMXNET3 it's extremely slow.
– tstm
Mar 3 '10 at 23:04
add a comment |
Did you try using another type of virtual network card?
The E1000 emulation seems to work pretty good for me, maybe it's driver based?
answered Mar 2 '10 at 23:29
Alexandre NizouxAlexandre Nizoux
373313
Did you try using another type of virtual network card?
The E1000 emulation seems to work pretty good for me, maybe it's driver based?
answered Mar 2 '10 at 23:29
Alexandre NizouxAlexandre Nizoux
373313
answered Mar 2 '10 at 23:29
Alexandre NizouxAlexandre Nizoux
373313
answered Mar 2 '10 at 23:29
Alexandre NizouxAlexandre Nizoux
373313
answered Mar 2 '10 at 23:29
Alexandre NizouxAlexandre Nizoux
373313
373313
Yes, I have tried both with e1000 and VMXNET
– tstm
Mar 2 '10 at 23:33
I tried installing Ubuntu Karmic as a testing client. I found out interesting things. When using "Flexible" as the network interface, the speeds are good in both directions. But with both e1000 and VMXNET3 it's extremely slow.
– tstm
Mar 3 '10 at 23:04
add a comment |
Yes, I have tried both with e1000 and VMXNET
– tstm
Mar 2 '10 at 23:33
I tried installing Ubuntu Karmic as a testing client. I found out interesting things. When using "Flexible" as the network interface, the speeds are good in both directions. But with both e1000 and VMXNET3 it's extremely slow.
– tstm
Mar 3 '10 at 23:04
Yes, I have tried both with e1000 and VMXNET
– tstm
Mar 2 '10 at 23:33
Yes, I have tried both with e1000 and VMXNET
– tstm
Mar 2 '10 at 23:33
I tried installing Ubuntu Karmic as a testing client. I found out interesting things. When using "Flexible" as the network interface, the speeds are good in both directions. But with both e1000 and VMXNET3 it's extremely slow.
– tstm
Mar 3 '10 at 23:04
I tried installing Ubuntu Karmic as a testing client. I found out interesting things. When using "Flexible" as the network interface, the speeds are good in both directions. But with both e1000 and VMXNET3 it's extremely slow.
– tstm
Mar 3 '10 at 23:04
add a comment |
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