[ovs-discuss] Faking Virtual Port Speed

[Ben Pfaff]

On Wed, May 25, 2016 at 12:12:13PM +0500, Abdul Basit wrote:
> For an experiment, instead of throttling bandwidth in mininet using 'bw'
> parameter. My objective is to create virtual interfaces with different
> speeds. As per my understanding, OVS creates virtual interfaces using veth
> pair on behalf of our mininet command. Instead of modifying linux kernel, i
> want OVS to visualize/pretend virtual interfaces of different speeds. To do
> so i did following steps
> 
> 1. I have modified 'bridge.c'
> 2. In 'iface_refresh_netdev_status' function i am passing custom speed to
> 'ovsrec_interface_set_link_speed' function
> 3. For testing my modified code i am adding new port to a bridge 'br0' but
> this does't seem to call 'iface_refresh_netdev_status' function even i
> tried writing this value in file on disk.
> 
> I need guidance whether i'm heading in a right direction to fake the port
> speed?
> May i know any resource from where i could find more detail for OVS code
> insight?

Where do you want the fake speed to appear?