[prev in list] [next in list] [prev in thread] [next in thread] 

List:       linux-bridge
Subject:    Re: [Bridge] brctl project
From:       Stephen Hemminger <shemminger () linux-foundation ! org>
Date:       2008-12-03 19:35:17
Message-ID: 20081203113517.6797fa2d () extreme
[Download RAW message or body]

On Wed, 3 Dec 2008 18:47:14 +0100
Christian Salgado González <chrisalga@hotmail.com> wrote:

> 
> Hi Stephen,
> 
> My name is Christian Salgado, I am studying computer engeneering, this is my last \
> year and I am doing my final Project. I have sent you a previous email, but I think \
> that you have not understood my problem. I will try to explain you:  (3 pcs)
> I have a Pc,called "switch" running brctl(3 interfaces: 2 ethernet and one wifi \
> card, ath0, using Mafwifi).  Other Pc,called client Pc, with two interfaces(wlan0 \
> and eth0),at this computer I have ifenslave bounding both interfaces.  A pc called \
> server. When I send a media stream from the server to the client, through the \
> switch(brctl), Ifenslave makes load balancing (mode 0 is the only one which I am \
> able to use). To know when ifenslave change the operation interface I have used \
> wireshark. It is very simply, when the client receive a ping request ifenslave \
> answer it one time on eth0 and the next on wlan0.  Then brctl learn which is the \
> interface to forward the data. 
> I think that changing the interface sending a ping is not a good way of doing \
> things. This is the reason why I am writing to you. Please, correct me if I am \
> wrong, but I think that brctl join the interfaces assigning the same port number  \
> to both interfaces. 1     00:11:22:33:44:55       yes                0.00
> 1     00:aa:ff:ff:ff:ff       no                 5.81

Two interfaces should never have same port number (at least as far as bridge is
concerned).

> 2     00:11:11:11:11:11       yes                0.00
> 
> 
> For example in the previous table there is a connection between the 2 first \
> interfaces. 
> Could be possible change the port number of   00:aa:....:ff   to 2 ? 

Port number only matters to STP, which you probably are not using.
  
> 
> In that case it will be on the same network as 00:11...:11,  isn't it??

Two active interfaces on same network with bridge is equivalent to forwarding
loop. You need to run STP, and have only one active interface.

> I have been looking at the code of brtcl and I have found the struc fdb. What do \
> you think that it is the best way of doing it?? 

Yes you can go do what you want with the code, but this is really one
of those: "I think I can hack the bridge code to do my own personal
idea of special case routing"

My answer to this is: "have fun, tell us what you find out, don't expect any support"
_______________________________________________
Bridge mailing list
Bridge@lists.linux-foundation.org
https://lists.linux-foundation.org/mailman/listinfo/bridge


[prev in list] [next in list] [prev in thread] [next in thread]