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Date:      Mon, 20 Apr 2015 18:34:30 -0700
From:      Adrian Chadd <adrian@freebsd.org>
To:        Andrew Thompson <thompsa@freebsd.org>
Cc:        Petko Bordjukov <bordjukov@gmail.com>,  "freebsd-mips@freebsd.org" <freebsd-mips@freebsd.org>
Subject:   Re: Control over the RSTP functionality of the AR8327 switch engine
Message-ID:  <CAJ-VmokfKbRN_u2uVJEvep5hp3yS-emUWf86tMnPVEQYg1t56w@mail.gmail.com>
In-Reply-To: <CAFAOGNRHN978VRn50aptJfe9RoMEqA1QpbNJCG=8ps4H2xdROw@mail.gmail.com>
References:  <1429572177.20150.28.camel@gmail.com> <CAJ-VmokzcNSLzBSy2v2KQU1oVENM9nautcAwviaRDMO7ZdmztQ@mail.gmail.com> <CAAgmp6ucYsXVh=1nL=yoCCObpA-4OXmFVT4bAjGqp_U%2Bpj2eTQ@mail.gmail.com> <CAJ-Vmo==Vf-9U0znnO9P=uPBwTRh-yA2cvFuU_rR-L0KWFcxZw@mail.gmail.com> <1429576261.20150.31.camel@gmail.com> <CAJ-VmonezF2KGu00eUzKJn9ODRiR_DoMRF9Jy4chpeYHCPcXOQ@mail.gmail.com> <1429577274.20150.35.camel@gmail.com> <CAFAOGNRHN978VRn50aptJfe9RoMEqA1QpbNJCG=8ps4H2xdROw@mail.gmail.com>

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On 20 April 2015 at 17:58, Andrew Thompson <thompsa@freebsd.org> wrote:
> On 21 April 2015 at 12:47, Petko Bordjukov <bordjukov@gmail.com> wrote:
>>
>> On =D0=BF=D0=BD, 2015-04-20 at 17:35 -0700, Adrian Chadd wrote:
>> > Oh.
>> >
>> > So, I think the point here is that you can control the port STP mode
>> > (blocked, learning, active, etc) - you then glue that into the
>> > existing bridge code in software that's speaking STP.
>> >
>> > I don't know if the AR8327 speaks STP/RSTP itself. I know it manages
>> > its own learning.
>>
>> I came to that conclusion as well. It looks like AR8327 only gives you
>> the tools to control the mode of the port and you have to implement
>> RSTP yourself. Which brings us back to square one in the other thread.
>
>
> We already have a standalone RSTP implemetation in net/bridgestp.c, it do=
es
> not depend on the bridge code. If you look in bridgestp.h there are only =
a
> couple of functions you need to call. You could hook in to
> bstp_set_port_state() to set the chip register to the correct
> discard/learn/forward state and somehow pass up the PDUs to bstp_input().
> Not sure if its worth it but the hard part is done.

Hi,

Right. So it wouldn't be that difficult to do; someone just has to go
ahead and do it. :-)

Petko - having per-port STP awareness on etherswitch would be nice. If
anyone here is interested in helping Petko out then please let him
know. I'm way too busy doing other things.




-adrian



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