Messages in this thread | | | Date | Thu, 30 Sep 1999 11:32:02 -0700 (PDT) | From | David Lang <> | Subject | Re: Why no printk for duplicate IPs? |
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On Wed, 29 Sep 1999, Christopher McCrory wrote:
> John Fulmer wrote: > > > > <snip> > > > > > The way I've seen this done (on BSDI boxen, I think) is that the system > > does an arp for it's own IP address before/as the interface is brought up. > > It it gets a response, it assumes that there is another box out there with > > the same IP address (not a BAD assumption). > > This IIRC is a gratuitous arp. In the kernel source I have seen > references to it but I have never actually seen on used in a linux box. > I first noticed this when moving a virtual ip address from one machine > to another. No gratuitous arp. Then I also noticed the same behaviour > on the "main" nic ip address. >
no a gratuttous arp is a broadcast ARP response, telling eveyone who you are before they ask. arping to see if someone else has your address is a different ballgame.
David Lang
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