[Guy Harris <guy@xxxxxxxxxxxx>]

On Jul 16, 2012, at 9:56 AM, Michael Tuexen wrote:

> One problem with a global capture filter is, that it might apply to some interfaces,
> but not to all. That is why we make the capture filter a "per interface" setting.
> This way we can check if it makes sense (showing it with a green or red background).

And if it's global, you can attempt to compile it with the link-layer header types for all of the selected interfaces and show it with a red background if any of those attempts fail.