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Re: Is this a bridging scenario?

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On Sunday 25 March 2012 10:56, Pascal Hambourg conveyed the following to 
comp.os.linux.networking...

> Hello,
> 
> Aragorn a écrit :
>> On Saturday 24 March 2012 23:55, Al conveyed the following to
>> comp.os.linux.networking...
>> 
>>> <IP CAM>-------WIRED------<<PC  <LAN CARD>+<WIFI CARD> >> ------- /
>>> WIRELESS/ --------<ROUTER>---INET
>>>
>>> So in otherwords I have a IP Camera wired to a Linux PC which
>>> wirelessly connects to a ADSL modem/router, that is the wired
>>> inetfaces connects the camera to the PC, and the wireless interface
>>> connects the PC to the router.
>>>
>>> I want the Camera to be able to connect to the Internet via the
>>> modem router.
>>>
>>> Is this what is called a bridge?
>> 
>> No, what you are describing is routing.
> 
> It could be bridging too.

Yes, I realized this after I had already sent off my reply.

> If the OP requires that the camera gets its IP configuration from the
> modem-router's DHCP server, then it will probably be bridging, because
> routing requires two separate subnets while bridging expands the LAN.

That is correct.

> Note that not all wireless NICs support bridging. See
> 
<http://www.linuxfoundation.org/collaborate/workgroups/networking/bridge#It_doesn.27t_work_with_my_Wireless_card.21>

I didn't know about that, but then again I'm not very well-versed on 
wireless stuff.  The only thing I myself use it for is for having my 
Android phone connect to the internet via my Linksys WRT54GL router, 
which supports both wired and wireless connections.  My computers are 
all connected via CAT5e UTP cables. ;-)

>> Bridging is when you have a single NIC device acting like it is
>> multiple virtual NICs, each with their own IP address and/or MAC
>> address.
> 
> Huh ? Bridging is when interfaces (not only NICs) are used as ports of
> a software switch.

Yes, poor choice of words on my part - my apologies.  By "NIC" I meant 
"something in which you plug a (physical or virtual) network cable".

> Usually bridged interfaces do not have an IP address on their own, it
> is transferred the bridge interface.

That too is correct.  My brain shortcircuited for a second with regard 
to the IP addresses.  The idea of course is to have a _common_ IP 
address for the whole bridge, whereas with routing, you have two 
different subnets talking to eachother and thus two different IP ranges.

-- 
= Aragorn =
(registered GNU/Linux user #223157)

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Is this a bridging scenario? Al <bigal.nz@gmail.com> - 2012-03-24 15:55 -0700
  Re: Is this a bridging scenario? Al <bigal.nz@gmail.com> - 2012-03-24 15:57 -0700
  Re: Is this a bridging scenario? Aragorn <stryder@telenet.be.invalid> - 2012-03-25 09:26 +0200
    Re: Is this a bridging scenario? Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2012-03-25 10:56 +0200
      Re: Is this a bridging scenario? Aragorn <stryder@telenet.be.invalid> - 2012-03-25 12:19 +0200
    Re: Is this a bridging scenario? Al <bigal.nz@gmail.com> - 2012-04-08 05:00 -0700
      Re: Is this a bridging scenario? Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2012-04-08 14:20 +0200
        Re: Is this a bridging scenario? Al <bigal.nz@gmail.com> - 2012-04-08 06:10 -0700
          Re: Is this a bridging scenario? Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2012-04-08 16:28 +0200
            Re: Is this a bridging scenario? Al <bigal.nz@gmail.com> - 2012-04-08 12:39 -0700
              Re: Is this a bridging scenario? Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2012-04-08 22:32 +0200
                Re: Is this a bridging scenario? Al <bigal.nz@gmail.com> - 2012-04-09 08:28 -0700
                Re: Is this a bridging scenario? Scott Hemphill <hemphill@hemphills.net> - 2012-04-09 12:41 -0400
                Re: Is this a bridging scenario? Al <bigal.nz@gmail.com> - 2012-04-09 11:52 -0700
                Re: Is this a bridging scenario? Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2012-04-09 21:09 +0200
                Re: Is this a bridging scenario? Al <bigal.nz@gmail.com> - 2012-04-10 01:56 -0700
                Re: Is this a bridging scenario? Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2012-04-10 20:30 +0200
                Re: Is this a bridging scenario? Al <bigal.nz@gmail.com> - 2012-04-10 16:30 -0700
                Re: Is this a bridging scenario? Al <bigal.nz@gmail.com> - 2012-04-10 19:23 -0700
                Re: Is this a bridging scenario? Al <bigal.nz@gmail.com> - 2012-04-10 22:54 -0700
                Re: Is this a bridging scenario? Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2012-04-11 09:33 +0200
                Re: Is this a bridging scenario? Scott Hemphill <hemphill@hemphills.net> - 2012-04-09 18:19 -0400

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