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

于 2015年02月13日 10:45, yzhu1 写道:

On 02/12/2015 08:55 PM, Stephen Hemminger wrote:

quoted

On Thu, 12 Feb 2015 13:35:23 +0800
Zhu Yanjun [off-list ref] wrote:

quoted

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

Thanks for your comments.

Yes. But the real physical nic speed often 10M, 100M and 1000M.
This simulates the physical nic.

   ^^^^^^^^^^^^^^^
then a speed control logical would be needed to effect the corresponding speed
when tun/tap gets/puts packets corresponding to the speed setting.

What's the benefit when changing speed from 10Mb/s to 1000Mb/s?

Just xia bibi ;)