--- Jaison Jose <[EMAIL PROTECTED]> wrote:

Hi Jaison,

please kindly have a look at
http://www.netmeister.org/news/learn2quote.html first. Newspapers are
made for to people reading a lot. They would not mess with colours.

> Once I know that I check my ARP table for any entries. When there is
> a
> static entry, there was already someone who cared for me (i.e. the
> administrator). When there is a dynamic entry I grab the MAC address
> from the table and send the packet there. (Now here is the problem. U
> want 
> to contact Host B, But there is a dynamic entry for Host A in the ARP
> table 
> as below.
> 
> 10.0.0.2 <http://10.0.0.2> 0x1 0x2 01:23:45:67:89:AB
> 
> Host B also having the same IP address so u start to communicate with
> Host 
> A.
> 
> Hope U got my point.

Well I'm starting to see some rays, but it is still very dark. If I got
you right and the Linux kernel does not care which interface it
remembered, then it can't contact Host B, because of the missing
interface. Remember that it determined the interface first and then
tried to send a packet to a MAC address from the ARP table.

Now when the kernel would take notice which interface it used (I showed
you that my kernel does remember which interface it was) it would
notice that it doesn't have the MAC for this interface and the hole
process should work with just one ARP table.

Have a look in /proc/sys/net/*. I might find there something to enable
or disable this.

What is the purpose of using IP addresses twice and routing them per
conditions other than destination?

> So what U need is a separate ARP table for each interface as U know
> through 
> which interface u want to communicate. 

You'll have to determine first which interface you want to use. What
would you do when the entry is not yet in the table?

Dirk.


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