[CentOS] configure network bridge listing bridged intefaces

On 02/05/2012 10:17 AM, Robert Spangler wrote:
> On Saturday 04 February 2012 19:18, the following was written:
>
>>   On 02/03/2012 11:56 PM, Robert Spangler wrote:
>>   >  On Friday 03 February 2012 09:10, the following was written:
>>   >>    On 02/03/2012 08:07 AM, Mihamina Rakotomandimby wrote:
>>   >>    >   Hi all,
>>   >>    >
>>   >>    >   Having a 4 NIC server, I want to bridge eth2 and eth3, with a
>>   >>    >  bridge named br0.
>>   >>    >
>>   >>    >   Searching the web I only found about creating a file
>>   >>    >   /etc/sysconfig/network-scripts/ifcfg-br0, but did not find where
>>   >>    >  to explicitely list what ports will be bridged.
>>   >>    >
>>   >>    >   Where is it configured?
>>   >>    >
>>   >>    >   Thank you.
>>   >>
>>   >>    All packets appear on both interfaces, unless you use
>>   >>  ebtables/iptables to restrict them.
>>   >
>>   >  Really?  Only hubs present packets to all interfaces.  Linux work as a
>>   >  router not a hub.
>>
>>   A network bridge connects multiple network segments at the data link layer
>> (Layer 2) of the OSI model. In Ethernet networks, the term bridge formally
>> means a device that behaves according to the IEEE 802.1D standard. A bridge
>> and a switch are very much alike; a switch being a bridge with numerous
>> ports. Switch or Layer 2 switch is often used interchangeably with bridge.
> The OP was asking for help on configuring bridging.  You reply made it sound
> like it wasn't necessary as "All packets appear on both interfaces".  That
> statement is false unless it has been configured that way. Which at that
> point in time we can assume that the OP hasn't configured it, thus the
> question.
>
> Nice textbook definition btw.
>
Hi Robert,

I guess I misread his question - I thought he had the bridge setup and was asking about how to specify what tcp/udp ports would be bridged.
My bad.

Regards,
Steve

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Stephen Clark
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