Dual nic on a server

[Derick Centeno]

Hi Luis, perhaps if you post your query on the YDL General list you  
could find persons with a wider skill set better able to respond.  As  
I understand it, the list where you originally posted your query is  
intended for absolute beginners in Linux.

On Oct 15, 2007, at 12:54 PM, Luis Fernandez De Jauregui wrote:

> Hi,
>
> If I have a Silicon Mechanics server with two NICs connected to  
> different networks. When I send a packet to a remote host, it goes  
> through my routing tables and sends the message out the correct  
> interface with it's corresponding IP address as the source IP.  
> Every now and then I see some packets go out on that same interface  
> but with the IP address assigned to the other interface as the  
> source IP.
>
> My question is, how does the OS choose what IP address to use as  
> the source IP? I thought that it was going to go through the  
> routing tables, choose the interface and then put the IP associated  
> with that interface as the source, but it looks like it is not  
> always doing that. ANy ideas?
>
> Thanks,
>
> Luis Emilio Fernandez de Jáuregui
> Sr. MSS GSM/UMTS Lab Infrastructure
> Nortel
> luisf at nortel.com
> Telephone (972) 684 1472 / ESN 444 1472
> Fax (972) 684 3715
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>
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