[Dnsmasq-discuss] DHCPv6

Wed Apr 10 08:06:46 BST 2013

On Tue, 09 Apr 2013 10:18:15 +0100, Simon Kelley wrote:
>> Hope that helps...
>
> It helps a lot, but there must be other stuff going on here that we 
> don't have logs for. The crucial thing to look for is the IAID: that's 
> logged in the ia-na options which dnsmasq is sending, and it appears as 
> the second field in the leases file.

I have checked all the logs and there is no IAID 2147483647 being
logged by dnsmasq.

Here are some more logs - this time with a tcpdump of the DHCPv6
requests. Again, I restarted dnsmasq between 7:39 and 7:42 (the
tcpdump log is shown in BST, dnsmasq in GMT - so the times correspond).

07:39:16.848824 IP6 (hlim 1, next-header UDP (17) payload length: 92) fe80::226:9eff:fe38:e5fb.546 > ff02::1:2.547: [udp sum ok] dhcp6 solicit (xid=a2fe8f (client-ID hwaddr/time type 1 time 418602092 00269e38e5fb) (option-request DNS-search-list Client-FQDN DNS-server NTP-server) (elapsed-time 0) (IA_NA IAID:2654529019 T1:3600 T2:5400 (IA_ADDR 2a01:348:236:feed::13 pltime:7200 vltime:10800) (opt_0) (opt_0) (opt_0)))
07:39:16.856135 IP6 (class 0xc0, hlim 64, next-header UDP (17) payload length: 130) fe80::ba27:ebff:fea5:5a4f.547 > fe80::226:9eff:fe38:e5fb.546: [udp sum ok] dhcp6 advertise (xid=a2fe8f (client-ID hwaddr/time type 1 time 418602092 00269e38e5fb) (server-ID hwaddr/time type 1 time 418604073 b827eba55a4f) (IA_NA IAID:2654529019 T1:3600 T2:6300 (IA_ADDR 2a01:348:236:feed::13 pltime:7200 vltime:7200)[|dhcp6ext]) (status-code success) (preference 0) (DNS-server 2a01:348:236:feed::1))
07:39:17.900212 IP6 (hlim 1, next-header UDP (17) payload length: 110) fe80::226:9eff:fe38:e5fb.546 > ff02::1:2.547: [udp sum ok] dhcp6 request (xid=701734 (client-ID hwaddr/time type 1 time 418602092 00269e38e5fb) (server-ID hwaddr/time type 1 time 418604073 b827eba55a4f) (option-request DNS-search-list Client-FQDN DNS-server NTP-server) (elapsed-time 0) (IA_NA IAID:2654529019 T1:3600 T2:5400 (IA_ADDR 2a01:348:236:feed::13 pltime:7200 vltime:7500) (opt_0) (opt_0) (opt_0)))
07:39:17.920097 IP6 (class 0xc0, hlim 64, next-header UDP (17) payload length: 125) fe80::ba27:ebff:fea5:5a4f.547 > fe80::226:9eff:fe38:e5fb.546: [udp sum ok] dhcp6 reply (xid=701734 (client-ID hwaddr/time type 1 time 418602092 00269e38e5fb) (server-ID hwaddr/time type 1 time 418604073 b827eba55a4f) (IA_NA IAID:2654529019 T1:3600 T2:6300 (IA_ADDR 2a01:348:236:feed::13 pltime:7200 vltime:7200)[|dhcp6ext]) (status-code success) (DNS-server 2a01:348:236:feed::1))

07:42:27.568648 IP6 (hlim 1, next-header UDP (17) payload length: 92) fe80::226:9eff:fe38:e5fb.546 > ff02::1:2.547: [udp sum ok] dhcp6 solicit (xid=60115e (client-ID hwaddr/time type 1 time 418602092 00269e38e5fb) (option-request DNS-search-list Client-FQDN DNS-server NTP-server) (elapsed-time 0) (IA_NA IAID:2654529019 T1:3600 T2:5400 (IA_ADDR 2a01:348:236:feed::13 pltime:7200 vltime:10800) (opt_0) (opt_0) (opt_0)))
07:42:27.576547 IP6 (class 0xc0, hlim 64, next-header UDP (17) payload length: 130) fe80::ba27:ebff:fea5:5a4f.547 > fe80::226:9eff:fe38:e5fb.546: [udp sum ok] dhcp6 advertise (xid=60115e (client-ID hwaddr/time type 1 time 418602092 00269e38e5fb) (server-ID hwaddr/time type 1 time 418604073 b827eba55a4f) (IA_NA IAID:2654529019 T1:5400 T2:9450 (IA_ADDR 2a01:348:236:feed::da3b pltime:10800 vltime:10800)[|dhcp6ext]) (status-code success) (preference 0) (DNS-server 2a01:348:236:feed::1))
07:42:28.630072 IP6 (hlim 1, next-header UDP (17) payload length: 110) fe80::226:9eff:fe38:e5fb.546 > ff02::1:2.547: [udp sum ok] dhcp6 request (xid=587bf0 (client-ID hwaddr/time type 1 time 418602092 00269e38e5fb) (server-ID hwaddr/time type 1 time 418604073 b827eba55a4f) (option-request DNS-search-list Client-FQDN DNS-server NTP-server) (elapsed-time 0) (IA_NA IAID:2654529019 T1:3600 T2:5400 (IA_ADDR 2a01:348:236:feed::da3b pltime:7200 vltime:7500) (opt_0) (opt_0) (opt_0)))
07:42:28.652005 IP6 (class 0xc0, hlim 64, next-header UDP (17) payload length: 125) fe80::ba27:ebff:fea5:5a4f.547 > fe80::226:9eff:fe38:e5fb.546: [udp sum ok] dhcp6 reply (xid=587bf0 (client-ID hwaddr/time type 1 time 418602092 00269e38e5fb) (server-ID hwaddr/time type 1 time 418604073 b827eba55a4f) (IA_NA IAID:2654529019 T1:3600 T2:6300 (IA_ADDR 2a01:348:236:feed::da3b pltime:7200 vltime:7200)[|dhcp6ext]) (status-code success) (DNS-server 2a01:348:236:feed::1))

Apr 10 06:39:16 localhost dnsmasq-dhcp[2917]: 10681999 available DHCP range: 2a01:348:236:feed::d000 -- 2a01:348:236:feed::dfff
Apr 10 06:39:16 localhost dnsmasq-dhcp[2917]: 10681999 DHCPSOLICIT(eth0) 00:01:00:01:18:f3:5c:6c:00:26:9e:38:e5:fb 
Apr 10 06:39:16 localhost dnsmasq-dhcp[2917]: 10681999 DHCPADVERTISE(eth0) 2a01:348:236:feed::13 00:01:00:01:18:f3:5c:6c:00:26:9e:38:e5:fb 
Apr 10 06:39:16 localhost dnsmasq-dhcp[2917]: 10681999 requested options: 24:domain-search, 39:FQDN, 23:dns-server, 
Apr 10 06:39:16 localhost dnsmasq-dhcp[2917]: 10681999 requested options: 31:sntp-server
Apr 10 06:39:16 localhost dnsmasq-dhcp[2917]: 10681999 tags: known, dhcpv6, eth0
Apr 10 06:39:16 localhost dnsmasq-dhcp[2917]: 10681999 sent size: 14 option:  1 client-id  00:01:00:01:18:f3:5c:6c:00:26:9e:38:e5:fb
Apr 10 06:39:16 localhost dnsmasq-dhcp[2917]: 10681999 sent size: 14 option:  2 server-id  00:01:00:01:18:f3:64:29:b8:27:eb:a5:5a:4f
Apr 10 06:39:16 localhost dnsmasq-dhcp[2917]: 10681999 sent size: 40 option:  3 ia-na  IAID=2654529019 T1=3600 T2=6300
Apr 10 06:39:16 localhost dnsmasq-dhcp[2917]: 10681999 nest size: 24 option:  5 iaaddr  2a01:348:236:feed::13 PL=7200 VL=7200
Apr 10 06:39:16 localhost dnsmasq-dhcp[2917]: 10681999 sent size:  9 option: 13 status  0 success
Apr 10 06:39:16 localhost dnsmasq-dhcp[2917]: 10681999 sent size:  1 option:  7 preference  0
Apr 10 06:39:16 localhost dnsmasq-dhcp[2917]: 10681999 sent size: 16 option: 23 dns-server  2a01:348:236:feed::1
Apr 10 06:39:17 localhost dnsmasq-dhcp[2917]: 7345972 available DHCP range: 2a01:348:236:feed::d000 -- 2a01:348:236:feed::dfff
Apr 10 06:39:17 localhost dnsmasq-dhcp[2917]: 7345972 DHCPREQUEST(eth0) 00:01:00:01:18:f3:5c:6c:00:26:9e:38:e5:fb 
Apr 10 06:39:17 localhost dnsmasq-dhcp[2917]: 7345972 DHCPREPLY(eth0) 2a01:348:236:feed::13 00:01:00:01:18:f3:5c:6c:00:26:9e:38:e5:fb 
Apr 10 06:39:17 localhost dnsmasq-dhcp[2917]: 7345972 requested options: 24:domain-search, 39:FQDN, 23:dns-server, 
Apr 10 06:39:17 localhost dnsmasq-dhcp[2917]: 7345972 requested options: 31:sntp-server
Apr 10 06:39:17 localhost dnsmasq-dhcp[2917]: 7345972 tags: known, dhcpv6, eth0
Apr 10 06:39:17 localhost dnsmasq-dhcp[2917]: 7345972 sent size: 14 option:  1 client-id  00:01:00:01:18:f3:5c:6c:00:26:9e:38:e5:fb
Apr 10 06:39:17 localhost dnsmasq-dhcp[2917]: 7345972 sent size: 14 option:  2 server-id  00:01:00:01:18:f3:64:29:b8:27:eb:a5:5a:4f
Apr 10 06:39:17 localhost dnsmasq-dhcp[2917]: 7345972 sent size: 40 option:  3 ia-na  IAID=2654529019 T1=3600 T2=6300
Apr 10 06:39:17 localhost dnsmasq-dhcp[2917]: 7345972 nest size: 24 option:  5 iaaddr  2a01:348:236:feed::13 PL=7200 VL=7200
Apr 10 06:39:17 localhost dnsmasq-dhcp[2917]: 7345972 sent size:  9 option: 13 status  0 success
Apr 10 06:39:17 localhost dnsmasq-dhcp[2917]: 7345972 sent size: 16 option: 23 dns-server  2a01:348:236:feed::1

Apr 10 06:42:27 localhost dnsmasq-dhcp[2926]: 6295902 available DHCP range: 2a01:348:236:feed::d000 -- 2a01:348:236:feed::dfff
Apr 10 06:42:27 localhost dnsmasq-dhcp[2926]: 6295902 DHCPSOLICIT(eth0) 00:01:00:01:18:f3:5c:6c:00:26:9e:38:e5:fb 
Apr 10 06:42:27 localhost dnsmasq-dhcp[2926]: 6295902 DHCPADVERTISE(eth0) 2a01:348:236:feed::da3b 00:01:00:01:18:f3:5c:6c:00:26:9e:38:e5:fb 
Apr 10 06:42:27 localhost dnsmasq-dhcp[2926]: 6295902 requested options: 24:domain-search, 39:FQDN, 23:dns-server, 
Apr 10 06:42:27 localhost dnsmasq-dhcp[2926]: 6295902 requested options: 31:sntp-server
Apr 10 06:42:27 localhost dnsmasq-dhcp[2926]: 6295902 tags: known, dhcpv6, eth0
Apr 10 06:42:27 localhost dnsmasq-dhcp[2926]: 6295902 sent size: 14 option:  1 client-id  00:01:00:01:18:f3:5c:6c:00:26:9e:38:e5:fb
Apr 10 06:42:27 localhost dnsmasq-dhcp[2926]: 6295902 sent size: 14 option:  2 server-id  00:01:00:01:18:f3:64:29:b8:27:eb:a5:5a:4f
Apr 10 06:42:27 localhost dnsmasq-dhcp[2926]: 6295902 sent size: 40 option:  3 ia-na  IAID=2654529019 T1=5400 T2=9450
Apr 10 06:42:27 localhost dnsmasq-dhcp[2926]: 6295902 nest size: 24 option:  5 iaaddr  2a01:348:236:feed::da3b PL=10800 VL=10800
Apr 10 06:42:27 localhost dnsmasq-dhcp[2926]: 6295902 sent size:  9 option: 13 status  0 success
Apr 10 06:42:27 localhost dnsmasq-dhcp[2926]: 6295902 sent size:  1 option:  7 preference  0
Apr 10 06:42:27 localhost dnsmasq-dhcp[2926]: 6295902 sent size: 16 option: 23 dns-server  2a01:348:236:feed::1
Apr 10 06:42:28 localhost dnsmasq-dhcp[2926]: 5798896 available DHCP range: 2a01:348:236:feed::d000 -- 2a01:348:236:feed::dfff
Apr 10 06:42:28 localhost dnsmasq-dhcp[2926]: 5798896 DHCPREQUEST(eth0) 00:01:00:01:18:f3:5c:6c:00:26:9e:38:e5:fb 
Apr 10 06:42:28 localhost dnsmasq-dhcp[2926]: 5798896 DHCPREPLY(eth0) 2a01:348:236:feed::da3b 00:01:00:01:18:f3:5c:6c:00:26:9e:38:e5:fb 
Apr 10 06:42:28 localhost dnsmasq-dhcp[2926]: 5798896 requested options: 24:domain-search, 39:FQDN, 23:dns-server, 
Apr 10 06:42:28 localhost dnsmasq-dhcp[2926]: 5798896 requested options: 31:sntp-server
Apr 10 06:42:28 localhost dnsmasq-dhcp[2926]: 5798896 tags: known, dhcpv6, eth0
Apr 10 06:42:28 localhost dnsmasq-dhcp[2926]: 5798896 sent size: 14 option:  1 client-id  00:01:00:01:18:f3:5c:6c:00:26:9e:38:e5:fb
Apr 10 06:42:28 localhost dnsmasq-dhcp[2926]: 5798896 sent size: 14 option:  2 server-id  00:01:00:01:18:f3:64:29:b8:27:eb:a5:5a:4f
Apr 10 06:42:28 localhost dnsmasq-dhcp[2926]: 5798896 sent size: 40 option:  3 ia-na  IAID=2654529019 T1=3600 T2=6300
Apr 10 06:42:28 localhost dnsmasq-dhcp[2926]: 5798896 nest size: 24 option:  5 iaaddr  2a01:348:236:feed::da3b PL=7200 VL=7200
Apr 10 06:42:28 localhost dnsmasq-dhcp[2926]: 5798896 sent size:  9 option: 13 status  0 success
Apr 10 06:42:28 localhost dnsmasq-dhcp[2926]: 5798896 sent size: 16 option: 23 dns-server  2a01:348:236:feed::1

and that's the resulting dnsmasq.leases file:

1365586946 00:26:9e:38:e5:fb 192.168.174.13 twilight *
duid 00:01:00:01:18:f3:64:29:b8:27:eb:a5:5a:4f
1365583348 2654529019 2a01:348:236:feed::da3b * 00:01:00:01:18:f3:5c:6c:00:26:9e:38:e5:fb
1365583157 2147483647 2a01:348:236:feed::13 * 00:01:00:01:18:f3:5c:6c:00:26:9e:38:e5:fb

Christof

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