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xen-devel
Re: [Xen-devel] How to get VM IP address through XenStore
James Harper wrote:
I just did a google search for "ip address from mac address" and there
are lots of people asking much the same question but I didn't come
across any useful answers.
My favourite method is "ping -b -c 1 <broadcast-addr>" and then look for
the MAC address in /proc/net/arp. There are numerous cases where it
doesn't work, but it works often enough to be useful. If you're using
DHCP and you can get to the DHCP server you can also ask it about the
mapping.
Finally, there's reverse ARP and rarpd which could be made to be useful
if you could watch for ARP requests and use them to build up a
/etc/ethers file.
jch
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