[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: IP aliasing question



On Wed, 6 Jan 1999, Ira Abramov wrote:

> 
> On Wed, 6 Jan 1999, Skliarouk Peter wrote:
> 
> > Hi!
> > 
> > why after I did IP aliasing on one computer for second computer,
> > and both computers are running
> > ping to the second computer doesn't returns dups?
> 
> because there is only one entry in the arp table for that IP address...
> why the HELL would you want two machines with the same IP?
> 
> -- 
> Ira Abramov ;  whois:IA58  ;  www.scso.com ;  all around Linux enthusiast 
> `When you say "I wrote a program that crashed Windows", people just stare
> at you blankly and say  "Hey, I got those with the system,  *for free*".'
>                                                          (Linus Torvalds)
> 
> 

Hi,
I have found that when you put two or more machines with the same IP
address on the same network segment the behaviour can depend on the type
of hub you are using. If your hub is smart it could bind to one interface
and send all packets there. In this case you don't get DUPs.

To answer Ira's question, it can be instructive to put two machines with
the same IP on a network to test how the network reacts. We then note the
behaviour and show the client so that he will recognize the problem. As I
said, the behaviour seems to differ if you are using a switching hub, but
I don't really know why.

 - yba

   EE 77 7F 30 4A 64 2E C5  83 5F E7 49 A6 82 29 BA    ~. .~   TclTek Ltd.
 =}-------------------------------------------------ooO--U--Ooo-----------{=
  - benavrhm@tcltek.co.il - tel: +972.52.670.353, http://www.tcltek.co.il -