[Bridge] Disable mac address learning

[Bridge] Disable mac address learning

[Benjamin Vanheuverzwijn]

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Hi,

Is there a way to disable the mac address learning in linux using "brctl" or
custom code so any packet sent to the bridge will be flooded in each
interfaces.

I would like to do something similar as OpenBSD:
$ brconfig <bridge> -learn <iface>
$ man brconfig
...
     -learn interface
             Mark interface so that the source address of packets received
             from interface are not entered into the address cache.
...

I tried to search on google and on the mailing-list without success.

Thanks in advance for your replies,

-- 
Benjamin Vanheuverzwijn

Google Talk/Jabber - bvanheu@gmail.com
http://vanheu.ca

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Re: [Bridge] Disable mac address learning

[Stephen Hemminger]

On Sat, 27 Nov 2010 16:46:34 -0500
Benjamin Vanheuverzwijn <bvanheu@gmail.com> wrote:

> Hi,
> 
> Is there a way to disable the mac address learning in linux using "brctl" or
> custom code so any packet sent to the bridge will be flooded in each
> interfaces.
> 
> I would like to do something similar as OpenBSD:
> $ brconfig <bridge> -learn <iface>
> $ man brconfig
> ...
>      -learn interface
>              Mark interface so that the source address of packets received
>              from interface are not entered into the address cache.
> ...
> 
> I tried to search on google and on the mailing-list without success.

Just set ageing time to zero no need for special config option.

Re: [Bridge] Disable mac address learning

[Benjamin Vanheuverzwijn]

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Hi,

Yes that's wat i thought but reading
http://www.linuxfoundation.org/collaborate/workgroups/networking/bridge#Showing_devices_in_a_bridge
tells
me that if i set aging time to 0, it will makes all entry permanent.

The aging time is the number of seconds a MAC address will be

kept in the forwarding database after having received a packet

from this MAC address.

The entries in the forwarding database are periodically timed out

to ensure they won't stay around forever.

Normally there should be no need to modify this parameter,

but it can be changed with (time is in seconds).


> # brctl setageing bridgename time


> Setting ageing time to zero makes all entries permanent.


My bad i did not take time to test it.

Thanks for your answer i will try this!

On Sat, Nov 27, 2010 at 5:16 PM, Stephen Hemminger <
shemminger@linux-foundation.org> wrote:

> On Sat, 27 Nov 2010 16:46:34 -0500
> Benjamin Vanheuverzwijn <bvanheu@gmail.com> wrote:
>
> > Hi,
> >
> > Is there a way to disable the mac address learning in linux using "brctl"
> or
> > custom code so any packet sent to the bridge will be flooded in each
> > interfaces.
> >
> > I would like to do something similar as OpenBSD:
> > $ brconfig <bridge> -learn <iface>
> > $ man brconfig
> > ...
> >      -learn interface
> >              Mark interface so that the source address of packets
> received
> >              from interface are not entered into the address cache.
> > ...
> >
> > I tried to search on google and on the mailing-list without success.
>
> Just set ageing time to zero no need for special config option.
>



-- 
Benjamin Vanheuverzwijn

Google Talk/Jabber - bvanheu@gmail.com
http://vanheu.ca

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Re: [Bridge] Disable mac address learning

[matan monitz]

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it works
i use it for transfering a port monitor via bridge
On Sun, Nov 28, 2010 at 12:21 AM, Benjamin Vanheuverzwijn <bvanheu@gmail.com
> wrote:

> Hi,
>
> Yes that's wat i thought but reading
> http://www.linuxfoundation.org/collaborate/workgroups/networking/bridge#Showing_devices_in_a_bridge tells
> me that if i set aging time to 0, it will makes all entry permanent.
>
> The aging time is the number of seconds a MAC address will be
>
> kept in the forwarding database after having received a packet
>
> from this MAC address.
>
> The entries in the forwarding database are periodically timed out
>
> to ensure they won't stay around forever.
>
> Normally there should be no need to modify this parameter,
>
> but it can be changed with (time is in seconds).
>
>
>> # brctl setageing bridgename time
>
>
>> Setting ageing time to zero makes all entries permanent.
>
>
> My bad i did not take time to test it.
>
> Thanks for your answer i will try this!
>
> On Sat, Nov 27, 2010 at 5:16 PM, Stephen Hemminger <
> shemminger@linux-foundation.org> wrote:
>
>> On Sat, 27 Nov 2010 16:46:34 -0500
>> Benjamin Vanheuverzwijn <bvanheu@gmail.com> wrote:
>>
>> > Hi,
>> >
>> > Is there a way to disable the mac address learning in linux using
>> "brctl" or
>> > custom code so any packet sent to the bridge will be flooded in each
>> > interfaces.
>> >
>> > I would like to do something similar as OpenBSD:
>> > $ brconfig <bridge> -learn <iface>
>> > $ man brconfig
>> > ...
>> >      -learn interface
>> >              Mark interface so that the source address of packets
>> received
>> >              from interface are not entered into the address cache.
>> > ...
>> >
>> > I tried to search on google and on the mailing-list without success.
>>
>> Just set ageing time to zero no need for special config option.
>>
>
>
>
> --
> Benjamin Vanheuverzwijn
>
> Google Talk/Jabber - bvanheu@gmail.com
> http://vanheu.ca
>
>
> _______________________________________________
> Bridge mailing list
> Bridge@lists.linux-foundation.org
> https://lists.linux-foundation.org/mailman/listinfo/bridge
>

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