netdev - Re: [BUG?] bridge_id not getting set for bridges created with

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Message-ID: <CAG-2HqU2f+4i3ttLSeitwr15=cVyin9VT+UrQvKC9pMV04fW7Q@mail.gmail.com>
Date:	Mon, 21 Apr 2014 22:56:15 +0200
From:	Tom Gundersen <teg@...m.no>
To:	netdev <netdev@...r.kernel.org>,
	bridge <bridge@...ts.linux-foundation.org>
Cc:	"C. R. Oldham" <cr@...tstack.com>
Subject: Re: [BUG?] bridge_id not getting set for bridges created with

On Mon, Apr 21, 2014 at 9:33 PM, Tom Gundersen <teg@...m.no> wrote:
> Hi,
>
> If IFLA_ADDRESS is set when creating a bridge over netlink, e.g.
>
> # ip link add test-bridge address b6:83:a2:b3:2f:0e type bride
>
> the bridge id is not set:
>
> # brctl show
> bridge name    bridge id        STP enabled    interfaces
> bridge1        8000.000000000000    no

My example was incomplete. To see the bug one should of course first
add an interface to the bridge:

# brctl addif bridge1 eth0


and observe that the bridge id remains unset:

# brctl show
bridge name    bridge id        STP enabled    interfaces
bridge1        8000.000000000000    no            eth0



If bridge1 had been created without specifying the mac address the
result is as expected:

# brctl show
bridge name    bridge id        STP enabled    interfaces
bridge1        8000.28d244547cdb    no            eth0

Cheers,

Tom
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