Re: [2.2] Network Interface aliasing

Christopher E. Brown (cbrown@denalics.net)
Tue, 9 Nov 1999 08:53:31 -0900 (AKST)


On Tue, 9 Nov 1999, Alan Cox wrote:

> > Make sure your are not tcpdumping on the machine in question.
> > If you put an interface in PROMISC mode, it will answer any packets to
> > any IP it thinks it has holds...
>
> This is nothing to do with tcpdump. The interface arps for addresses the
> machine has available.
>
> Alan

Not refering to arp here (was not as clear as should have
been)

I was talking about, 2 machine have the same Ip assigned to
them. A packet goes out to said IP, with the MAC of machine A, if
machine B is not in promisc, everything is fine. However, if machine
Bs interface in in promisc, the packet to the wrong MAC, but a local
IP will get handled and responded to by the IP layer.

If this has changed in 2.2.x, and the kernel flags wrong MAC
addr packets before passing them to the IP layer great.

---
As folks might have suspected, not much survives except roaches,
and they don't carry large enough packets fast enough...
--About the Internet and nuclear war.

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