Hi Simon, Thanks for getting back to me. Kermit is a Windows Home Server box and is definitely not net or dual booted. Here's the relevant 'log dhcp' extract from a clean boot of it.
dhcp-host=id:00:01:00:01:1b:75:4c:36:e0:3f:49:a1:d4:aa,[::4],Kermit dhcp-host=E0:3F:49:A1:D4:AA,192.168.219.4,kermit Before booting: nslookup kermit nslookup: can't resolve '(null)': Name does not resolve Name: kermit Address 1: 2001:470:183f:da2b::4 kermit.darbyshire-bryant.me.uk Address 2: 192.168.219.4 kermit.darbyshire-bryant.me.uk No entries in dhcp.leases. Tue May 3 18:40:57 2016 daemon.info dnsmasq-dhcp[2862]: 1035611837 available DHCP range: 192.168.219.2 -- 192.168.219.253 Tue May 3 18:40:57 2016 daemon.info dnsmasq-dhcp[2862]: 1035611837 vendor class: MSFT 5.0 Tue May 3 18:40:57 2016 daemon.info dnsmasq-dhcp[2862]: 1035611837 client provides name: Kermit Tue May 3 18:40:57 2016 daemon.info dnsmasq-dhcp[2862]: 1035611837 DHCPREQUEST(br-lan) 192.168.219.4 e0:3f:49:a1:d4:aa Tue May 3 18:40:57 2016 daemon.info dnsmasq-dhcp[2862]: 1035611837 tags: lan, known, br-lan Tue May 3 18:40:57 2016 daemon.info dnsmasq-dhcp[2862]: 1035611837 DHCPACK(br-lan) 192.168.219.4 e0:3f:49:a1:d4:aa kermit Tue May 3 18:40:57 2016 daemon.info dnsmasq-dhcp[2862]: 1035611837 requested options: 1:netmask, 15:domain-name, 3:router, 6:dns-server, Tue May 3 18:40:57 2016 daemon.info dnsmasq-dhcp[2862]: 1035611837 requested options: 44:netbios-ns, 46:netbios-nodetype, 47:netbios-scope, Tue May 3 18:40:57 2016 daemon.info dnsmasq-dhcp[2862]: 1035611837 requested options: 31:router-discovery, 33:static-route, 121:classless-static-route, Tue May 3 18:40:57 2016 daemon.info dnsmasq-dhcp[2862]: 1035611837 requested options: 249, 43:vendor-encap Tue May 3 18:40:57 2016 daemon.info dnsmasq-dhcp[2862]: 1035611837 next server: 192.168.219.1 Tue May 3 18:40:57 2016 daemon.info dnsmasq-dhcp[2862]: 1035611837 broadcast response Tue May 3 18:40:57 2016 daemon.info dnsmasq-dhcp[2862]: 1035611837 sent size: 1 option: 53 message-type 5 Tue May 3 18:40:57 2016 daemon.info dnsmasq-dhcp[2862]: 1035611837 sent size: 4 option: 54 server-identifier 192.168.219.1 Tue May 3 18:40:57 2016 daemon.info dnsmasq-dhcp[2862]: 1035611837 sent size: 4 option: 51 lease-time 12h Tue May 3 18:40:57 2016 daemon.info dnsmasq-dhcp[2862]: 1035611837 sent size: 4 option: 58 T1 6h Tue May 3 18:40:57 2016 daemon.info dnsmasq-dhcp[2862]: 1035611837 sent size: 4 option: 59 T2 10h30m Tue May 3 18:40:57 2016 daemon.info dnsmasq-dhcp[2862]: 1035611837 sent size: 4 option: 1 netmask 255.255.255.0 Tue May 3 18:40:57 2016 daemon.info dnsmasq-dhcp[2862]: 1035611837 sent size: 4 option: 28 broadcast 192.168.219.255 Tue May 3 18:40:57 2016 daemon.info dnsmasq-dhcp[2862]: 1035611837 sent size: 4 option: 3 router 192.168.219.1 Tue May 3 18:40:57 2016 daemon.info dnsmasq-dhcp[2862]: 1035611837 sent size: 4 option: 6 dns-server 192.168.219.1 Tue May 3 18:40:57 2016 daemon.info dnsmasq-dhcp[2862]: 1035611837 sent size: 23 option: 15 domain-name darbyshire-bryant.me.uk Tue May 3 18:40:57 2016 daemon.info dnsmasq-dhcp[2862]: 1035611837 sent size: 33 option: 81 FQDN 03:ff:ff:6b:65:72:6d:69:74:2e:64:61:72:62... Tue May 3 18:40:57 2016 daemon.info dnsmasq-dhcp[2862]: 1035611837 sent size: 4 option: 44 netbios-ns 192.168.219.1 Tue May 3 18:40:58 2016 daemon.info dnsmasq-dhcp[2862]: 9972055 available DHCP range: 2001:470:183f:da2b::2 -- 2001:470:183f:da2b::ffff:ffff Tue May 3 18:40:58 2016 daemon.info dnsmasq-dhcp[2862]: 9972055 vendor class: 311 Tue May 3 18:40:58 2016 daemon.info dnsmasq-dhcp[2862]: 9972055 DHCPCONFIRM(br-lan) 00:01:00:01:1b:75:4c:36:e0:3f:49:a1:d4:aa Tue May 3 18:40:58 2016 daemon.info dnsmasq-dhcp[2862]: 9972055 DHCPREPLY(br-lan) 2001:470:183f:da2b::9f93:7b6a 00:01:00:01:1b:75:4c:36:e0:3f:49:a1:d4:aa Kermit Tue May 3 18:40:58 2016 daemon.info dnsmasq-dhcp[2862]: 9972055 tags: known, dhcpv6, br-lan Tue May 3 18:40:58 2016 daemon.info dnsmasq-dhcp[2862]: 9972055 sent size: 14 option: 1 client-id 00:01:00:01:1b:75:4c:36:e0:3f:49:a1:d4:aa Tue May 3 18:40:58 2016 daemon.info dnsmasq-dhcp[2862]: 9972055 sent size: 14 option: 2 server-id 00:01:00:01:1e:b7:72:d8:14:cc:20:be:89:33 Tue May 3 18:40:58 2016 daemon.info dnsmasq-dhcp[2862]: 9972055 sent size: 29 option: 13 status 0 all addresses still on link Only Entry in dhcp.leases related to kermit 1462340457 e0:3f:49:a1:d4:aa 192.168.219.4 kermit 01:e0:3f:49:a1:d4:aa Kermit thinks it has 2001:470:183f:da2b::9f93:7b6a as per the dhcp reply, which is fair enough but I don't understand why the UID was ignored. Also, nslookup replies from dnsmasq still only return the configured addresses for kermit and no sign of the dhcpv6 allocated one. Ideas? Kevin On 02/05/2016 17:24, Simon Kelley wrote: > On 30/04/16 11:32, Kevin Darbyshire-Bryant wrote: >> Further clues maybe: So initially when kermit comes up it grabs an IPv4 >> address and I see this entry in dnsmasq's lease database: >> 1462055024 e0:3f:49:a1:d4:aa 192.168.219.4 Kermit 01:e0:3f:49:a1:d4:aa >> >> Which looks pretty normal to me. Then a little while later, presumably >> after a dhcpv6 request it gets changed to >> 1462055060 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 >> >> There are also syslog messages of "abandoning lease to e0:3f:49:a1:d4:aa >> of 192.168.219.4" which I don't get at all. >> >> > Are you dual-booting Kermit, or netbooting it, or doing anything else > which may cause it to run more than one DHCP client? From the > information given it looks like the host with MAC address > e0:3f:49:a1:d4:aa is presenting two different client-ids at different > times. Since client-id trumps MAC address as a unique host identifier, > that could explain what's going on. (the client-id is the last field in > the leases database). > > Setting log-dhcp and posting the logs showing this sort of thing > happening would be useful. > > Cheers, > > Simon. > > >> On 29/04/16 12:27, Kevin Darbyshire-Bryant wrote: >>> 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 >>> >>> >>> >>> _______________________________________________ >>> Dnsmasq-discuss mailing list >>> Dnsmasq-discuss@lists.thekelleys.org.uk >>> http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss >> >> >> _______________________________________________ >> Dnsmasq-discuss mailing list >> Dnsmasq-discuss@lists.thekelleys.org.uk >> http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss >> > _______________________________________________ > Dnsmasq-discuss mailing list > Dnsmasq-discuss@lists.thekelleys.org.uk > http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss -- Thanks, ke...@darbyshire-bryant.me.uk M: +44 7947 355344 H: +44 1256 478597
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