[Dnsmasq-discuss] IPv6 dhcp strangeness

Kevin Darbyshire-Bryant kevin at darbyshire-bryant.me.uk
Fri Apr 29 12:27:48 BST 2016


Hi All,


I've just noticed some strange/different behaviour with regard to dhcpv6
address allocation.  I've a couple of 'internal' machines that I'd like
to have fixed ip addresses.  To that end, and it used to work I've got
lines similar to: 
dhcp-host=E0:3F:49:A1:D4:AA,192.168.219.4,[::0:4],Kermit   - In theory
kermit gets 192.168.219.4 and the ipv6 address 'constructed prefix::0:4'


Instead, these lines appear to be partially ignored with the host
getting the usual pseudo random address constructed from the ipv6
prefix/range.  An nslookup pointing to dnsmasq does return the '0:4'
address, unfortunately that's not the address handed out by dhcp.   I'm
also seeing ' abandoning lease to e0:3f:49:a1:d4:aa of 192.168.219.4'
type warnings which is odd.  Also the entry in the leases database looks
odd to me: 1461971298 e0:3f:49:a1:d4:aa 192.168.219.4 Kermit
01:52:41:53:20:e0:3f:49:a1:d4:aa:00:00:09:00:00:00 - that almost looks
like an ipv6 type entry.


Confused!


Kevin

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