# Re: \[PATCH 1/1\] tun: change speed from 10M to dynamically configured

- From: Stephen Hemminger \<stephen@networkplumber.org\>
- Date: 2015-02-12 12:56:03 
- List: netdev
- Page: https://ratatoskr.run/netdev/2015/02/10977987
- Thread: https://ratatoskr.run/netdev/2015/02/10977977/t.md

```text
On Thu, 12 Feb 2015 13:35:23 +0800
Zhu Yanjun [ref] wrote:

> From: Zhu Yanjun <redacted>
> 
> The default speed of normal nic is 1000M while the default speed
> of tun is 10M. Now the default speed of tun is changed to 1000M.
> And there are 3 options: 10M, 100M and 1000M to the speed of tun.
> The command "ethtool -s tun0 speed 10/100/1000" can configure the
> speed of tun dynamically.
> 
> CC: Michael S. Tsirkin <mst@redhat.com>
> CC: Jason Wang <redacted>
> CC: Al Viro <viro@zeniv.linux.org.uk>
> Signed-off-by: Zhu Yanjun <redacted>
> Signed-off-by: Zhu Yanjun <redacted>

Why limit to 10/100/1000 speed?
Ethtool speed can be any value

>  
```