Re: RSTP in http://git.kernel.org/?p=linux/kernel/git/shemminger/rstp.git; a=summary problems

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On Tue, 2008-04-01 at 01:39 +0530, Srinivas M.A. wrote:
> >
> >  I don't like the bridge-stp <bridge> start/stop interface. Why
> >  would bridge-stp know what bridge to run RTSP on? A more natural
> >  way, IMHO, would to extend brctl with a "rstp on" method. Why
> >  is there one rstpctl tool and one brctl tool?
> 
> I wrote rstpctl to just control the rstp daemon. Should integrate it
> with brctl, making it so that brctl checks whether kernel STP or RSTP
> is being used and sets either kernel STP config or sends the config to
> rstpd as appropriate. I haven't gotten around to that.
> 
> I don't like bridge-stp scheme too much either, especially after
> realizing the RTNL lock limitation, but it is just enough to get
> things working if we don't try to start rstpd from within it (though
> the sample does that.) Given the amount of trouble bridge-stp seems to
> cause, I should probably work on a different kernel interface for
> indicating userspace stp.
> 

Curious, why is RSTP in user space? Lots of protocols are in the kernel,
why not RSTP too?

Are any known issues with the in kernel STP?

I haven't read 802.1D-2004 but I know RSTP is in there, does RSTP
replace the old STP protocol? If not, is there any reason to prefer STP
before RSTP in some cases?

 Jocke 
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