netdev - Re: Cannot delete entries from bridge fdb

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Date:	Thu, 3 Apr 2014 08:30:57 +0200
From:	Albert Krenz <albert.krenz87@...glemail.com>
To:	Toshiaki Makita <toshiaki.makita1@...il.com>
Cc:	netdev@...r.kernel.org
Subject: Re: Cannot delete entries from bridge fdb

Deleting with the value 'master' worked! Thank you very much.

greetings
Albert Krenz

2014-04-02 18:46 GMT+02:00 Toshiaki Makita <toshiaki.makita1@...il.com>:
> On Wed, 2014-04-02 at 11:25 +0200, Albert Krenz wrote:
>> Hello everyone,
>> i have a question concerning the forwarding database (fdb) of the
>> bridges. I am using:
>> - Ubuntu 13.10
>> - kernel 3.11.0 from ubuntu repos
>> - bridge utility 0.0 from iproute2 package
>> - bridge-utils 1.5
>>
>> I have 3 applications, each one creating a tap (tap0 - tap2) which i
>> add to the bridge br0. Two Applications are receiving Frames (app0 and
>> app1) and the third one (app2) sends one Frame every second to app0.
>> SRC and DST MAC are different from the tap MAC's. App0 sends an answer
>> to app2 and the bridge adds an entry to his fdb with the MAC of app0
>> on tap0.
>>
>> Now i wanted to delete this entry which does not work. RTNETLINK tells
>> me there is no file or directory. See the following example:
>>
>> root@...c:~# bridge fdb show dev tap0
>> 33:33:00:00:00:01 self permanent
>> 01:00:5E:00:00:01 self permanent
>> 40:EC:F8:03:A7:B5 vlan 0
>>               << i want to delete this one
>> 9A:0D:06:68:5D:75 vlan 0 permanent
>>          << MAC of tap0
>> root@...c:~# bridge fdb del 40:EC:F8:03:A7:B5 vlan0 dev tap0
>> RTNETLINK answers: No such file or directory
>
> Please try this command.
> # bridge fdb del 40:EC:F8:03:A7:B5 dev tap0 master
>
> Thanks,
> Toshiaki Makita
>
>>
>> If i add a random entry i can delete it without any problem.
>>
>> root@...c:~# bridge fdb add 40:EC:F8:03:A7:FF vlan0 dev tap0
>> root@...c:~# bridge fdb del 40:EC:F8:03:A7:FF vlan0 dev tap0
>>                 << this works
>>
>> Is there another syntax to delete entries which the bridge has added
>> by himself? Or is it not possible to delete entries which you haven't
>> added by hand?
>>
>> greetings
>> Albert Krenz
>> --
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>
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