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Date: Mon, 18 May 1998 15:31:15 -0700 (PDT)
From: Doug White <dwhite@gdi.uoregon.edu>
Reply-To: Doug White <dwhite@resnet.uoregon.edu>
To: Karl Pielorz <kpielorz@tdx.co.uk>
cc: questions@FreeBSD.ORG
Subject: Re: ARP's - Overriden even if marked 'permanent'?
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On Sun, 17 May 1998, Karl Pielorz wrote:

> Does FreeBSD honour the 'permanent' flag of ARP's/IP addresses?
> 
> Recently I've locked down some ARP's on my FreeBSD box, then I changed the
> network card in my PC...
> 
> e.g.
> 
> arp -S 192.168.100.1 00:c0:23:43:f4:02
> 
> My PC with it's new network card would work 'most' the time - and I'd see
> kernel errors about 'arp moved from address xx.xx.xx.xx to yy.yy.yy.yy' etc.
> - Then I realised I'd made the ARP permanent on the FreeBSD box - so surely
> it should have ignored my PC (with it's new network card) completely?

I don't think so.  ARP is sort of arbitrary anyway, if it gets new
information it'll overwrite it.  It's `permanent' in the sense that it
won't expire it from the ARP cache and do ARP queries.

Doug White                              | University of Oregon  
Internet:  dwhite@resnet.uoregon.edu    | Residence Networking Assistant
http://gladstone.uoregon.edu/~dwhite    | Computer Science Major



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