[Dnsmasq-discuss] Remembering DHCP Assignments

Ed W lists at wildgooses.com
Sun Jul 17 23:30:40 BST 2011


On 15/07/2011 09:37, Simon Kelley wrote:
> Freddie Witherden wrote:
> 
>> Thank you for this.  /etc/ethers and /etc/hosts is quite a nice
>> solution.  However, I do have one query regarding mapping multiple
>> MACs/IP addresses to a single host.  Several devices on my network have
>> both wired and wireless adapters and it would be nice if both could
>> share the same hostname; under the assumption that the two will never be
>> connected at the same time.  Is this possible with /etc/ethers?
>>
> 
> 
> Not with /etc/ethers, but there is an alternative that works. To save
> typing, I'll link to a previous answer:
> 
> http://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2011q2/005041.html

Additionally, I failed to realise that you can put the "dhcp-hostsfile="
line in your conf file (to avoid potentially hacking a distro supplied
init file).  I personally find this option more useful than /etc/ethers...

And yes it does work nicely in practice.  In fact on my Mac, leaving
both adaptors live with the same IP address, mostly seems to work as you
might desire. It does seem to occasionally flip flop between adaptors
and on reflection I never thought to check that I'm not flooding the
network with spurious arp replies...  Obviously you are meant to disable
one of the adaptors...

Good luck

Ed W



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