Re: [MLUG] Just a TCP/IP question

Tue, 14 Dec 2010 05:40:53 -0800

Whoops, not completely true. If you configure your Linux system to use ethernet bonding (aka channel bonding) then multiple physical interfaces can respond to a single IP address. Learn more online, here's one example: 

http://www.cyberciti.biz/howto/question/static/linux-ethernet-bonding-driver-howto.php
It is, however, true that if you specify an IP address and port then that's all you need. The O/S will handle things correctly from there, bonded or not. Oh, and also note that a single physical NIC can respond to up 254 different IP addresses on your typical Linux system. It all depends on how you configure things. 

On 12/13/10 10:21 PM, Patricia Campbell wrote:
you bind to a port & ip addr (or default) since no ipaddr can be assigned to 2 phys interfaces the point about card # is moot, check out the stevens books if you're serious about tcp/ip coding on *nix
On Mon, Dec 13, 2010 at 9:54 PM, Leslie S Satenstein <[email protected] <mailto:[email protected]>> wrote: 

    I have been told that in the MS (XP, W7, etc), when a system has
    more than 1 network card, then we have to specify the card number
    to which we want to address a socket command, a connect, etc.
     After all, each card could be on a different system­.

    What about a linux system with multiple TCP/IP ports?  Do we have
    to do likewise?
    Nowhere with the samples for server or client, have I seen that we
    specify the card number (eth0, eth1, etc.)

    Did I miss something that is really different from the MS
    implementation and the Linux implementaton?
    *------------------

    *

    Regards

    *
     Leslie
    *
    *Mr. Leslie Satenstein
    *


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