From: Stephen Hemminger <stephen@networkplumber.org>
To: Dan Williams <dcbw@redhat.com>
Cc: netdev@vger.kernel.org
Subject: Re: bridge interface initial carrier state
Date: Mon, 11 Feb 2013 13:58:36 -0800 [thread overview]
Message-ID: <20130211135836.2220ca68@nehalam.linuxnetplumber.net> (raw)
In-Reply-To: <1360612915.8633.6.camel@dcbw.foobar.com>
On Mon, 11 Feb 2013 14:01:55 -0600
Dan Williams <dcbw@redhat.com> wrote:
> Hi,
>
> I'm wondering if the initial carrier state of 'on' is intentional for a
> bridge without ports; immediately after adding ports, the carrier is
> recalculated and depends on the combined state of each port's carrier
> and STP forwarding state. So a userspace program attempting to decide
> whether the bridge was usable or not has to look at both (a) how many
> ports are available and (b) bridge carrier state, instead of just
> looking at the bridge carrier state.
>
> Dan
It really should be off when no ports are present, but some initial startup
scripts broke when it was that way.
next prev parent reply other threads:[~2013-02-11 21:58 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-11 20:01 bridge interface initial carrier state Dan Williams
2013-02-11 21:58 ` Stephen Hemminger [this message]
2013-02-12 21:06 ` Jiri Pirko
2013-02-12 21:10 ` David Miller
2013-02-11 21:59 ` Stephen Hemminger
2013-02-11 22:46 ` Dan Williams
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