SystemVMs interfaces speed

[cdfgallo]

Hi everyone,

I was wondering if there is a way in Cloudstack to set the speed of the interfaces of systems to 10gbps in KVM environment.
Currently, even if hosts support 10gbps speed and VMs are using virtio drivers all interfaces are running at 1gbps.

Thank you in advance!

[weizhouapache]

@cdfgallo
what's the speed of the linux bridges ?

# ethtool cloudbr0 |grep Speed
	Speed: 10000Mb/s

[cdfgallo]

@weizhouapache
All bridges have 10gbps speed, here the example from our server

cloud08:~# ethtool cloudbr0 | grep Speed
        Speed: 10000Mb/s

[weizhouapache]

what's the MTU size ?
can you get 10Gbps on the host ? have you tested it ?

[cdfgallo]

Yes on the host I can have 10gbps, also if I force interfaces on a systemvm with command ethtool -s eth0 speed 10000 duplex full I can force the interface to 10gbps and it actually works, until the next reboot of course

[weizhouapache]

that's great.
it looks like all interfaces/bridges on the kvm hosts are configured correctly, except the interfaces inside the system vms.

do you get the same output inside the system vm ?

root@s-1147-VM:~# ethtool eth2
...
	Speed: Unknown!
	Duplex: Unknown! (255)

[cdfgallo]

yes, that's right. How can configure them ?

[rajujith]

Is it set to unlimited by default?

[weizhouapache]

could it be caused by the linux bridge ? it works in half duplex mode

[cdfgallo]

found the issues that was in my configuration.
Now all works as expected
Thank you for your support :)

[weizhouapache]

found the issues that was in my configuration. Now all works as expected Thank you for your support :)

good
can you share more details of your configuration ?