Cannot delete entries from bridge fdb

Cannot delete entries from bridge fdb

[Albert Krenz]

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@mypc:~# 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@mypc:~# bridge fdb del 40:EC:F8:03:A7:B5 vlan0 dev tap0
RTNETLINK answers: No such file or directory

If i add a random entry i can delete it without any problem.

root@mypc:~# bridge fdb add 40:EC:F8:03:A7:FF vlan0 dev tap0
root@mypc:~# 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

Re: Cannot delete entries from bridge fdb

[Toshiaki Makita]

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@mypc:~# 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@mypc:~# 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@mypc:~# bridge fdb add 40:EC:F8:03:A7:FF vlan0 dev tap0
> root@mypc:~# 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
> --
> To unsubscribe from this list: send the line "unsubscribe netdev" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: Cannot delete entries from bridge fdb

[Albert Krenz]

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@gmail.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@mypc:~# 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@mypc:~# 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@mypc:~# bridge fdb add 40:EC:F8:03:A7:FF vlan0 dev tap0
>> root@mypc:~# 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
>> --
>> To unsubscribe from this list: send the line "unsubscribe netdev" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>
>