Re: pppoe, dhcpcd v6 and renew

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Wed, Nov 15, 2017 at 10:49:11AM +0000, Roy Marples wrote:
> Do the rebind requests look correct?
> It's odd that they are ignored. No upstream has ever gotten back to me on
> why renews are ignored when this is reported.

Here's how it looks like with tcpdump -v:
11:56:53.918117 PPPoE  [ses 0x1807] IP6 (hlim 1, next-header UDP (17) payload length: 191) fe80::43e:1a93:9ba2:3ac9.65463 > ff02::1:2.547: [udp sum ok] dhcp6 rebind (xid=c4ddf4 (client-ID hwaddr/time type 1 time 562408048 024a06419271) (elapsed-time 0) (vendor-class) (IA_PD IAID:0 T1:0 T2:0 (IA_PD-prefix 2001:41d0:fe9d:1100::/56 pltime:86400 vltime:172800)) (Client-FQDN) (reconfigure-accept) (option-request DNS-server DNS-search-list SNTP-servers Client-FQDN opt_82 opt_83))

It looks OK (IA_PD-prefix is the right one) but I don't know dhcp enough
to make sure it's correct.

Attached is the complete output of tcpdump -v, for 2 modem reboot,
so you have the initial request and then the corresponding rebind.

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--

11:56:53.918117 PPPoE  [ses 0x1807] IP6 (hlim 1, next-header UDP (17) payload length: 191) fe80::43e:1a93:9ba2:3ac9.65463 > ff02::1:2.547: [udp sum ok] dhcp6 rebind (xid=c4ddf4 (client-ID hwaddr/time type 1 time 562408048 024a06419271) (elapsed-time 0) (vendor-class) (IA_PD IAID:0 T1:0 T2:0 (IA_PD-prefix 2001:41d0:fe9d:1100::/56 pltime:86400 vltime:172800)) (Client-FQDN) (reconfigure-accept) (option-request DNS-server DNS-search-list SNTP-servers Client-FQDN opt_82 opt_83))
11:56:54.858062 PPPoE  [ses 0x1807] IP6 (hlim 1, next-header UDP (17) payload length: 191) fe80::43e:1a93:9ba2:3ac9.65463 > ff02::1:2.547: [udp sum ok] dhcp6 rebind (xid=c4ddf4 (client-ID hwaddr/time type 1 time 562408048 024a06419271) (elapsed-time 93) (vendor-class) (IA_PD IAID:0 T1:0 T2:0 (IA_PD-prefix 2001:41d0:fe9d:1100::/56 pltime:86400 vltime:172800)) (Client-FQDN) (reconfigure-accept) (option-request DNS-server DNS-search-list SNTP-servers Client-FQDN opt_82 opt_83))
11:56:56.738129 PPPoE  [ses 0x1807] IP6 (hlim 1, next-header UDP (17) payload length: 191) fe80::43e:1a93:9ba2:3ac9.65463 > ff02::1:2.547: [udp sum ok] dhcp6 rebind (xid=c4ddf4 (client-ID hwaddr/time type 1 time 562408048 024a06419271) (elapsed-time 282) (vendor-class) (IA_PD IAID:0 T1:0 T2:0 (IA_PD-prefix 2001:41d0:fe9d:1100::/56 pltime:86400 vltime:172800)) (Client-FQDN) (reconfigure-accept) (option-request DNS-server DNS-search-list SNTP-servers Client-FQDN opt_82 opt_83))
11:57:00.508268 PPPoE  [ses 0x1807] IP6 (hlim 1, next-header UDP (17) payload length: 191) fe80::43e:1a93:9ba2:3ac9.65463 > ff02::1:2.547: [udp sum ok] dhcp6 rebind (xid=c4ddf4 (client-ID hwaddr/time type 1 time 562408048 024a06419271) (elapsed-time 659) (vendor-class) (IA_PD IAID:0 T1:0 T2:0 (IA_PD-prefix 2001:41d0:fe9d:1100::/56 pltime:86400 vltime:172800)) (Client-FQDN) (reconfigure-accept) (option-request DNS-server DNS-search-list SNTP-servers Client-FQDN opt_82 opt_83))
11:57:03.828366 PPPoE  [ses 0x1807] IP6 (hlim 1, next-header UDP (17) payload length: 191) fe80::43e:1a93:9ba2:3ac9.65463 > ff02::1:2.547: [udp sum ok] dhcp6 solicit (xid=578d35 (client-ID hwaddr/time type 1 time 562408048 024a06419271) (elapsed-time 0) (vendor-class) (IA_PD IAID:0 T1:0 T2:0 (IA_PD-prefix 2001:41d0:fe9d:1100::/56 pltime:86400 vltime:172800)) (Client-FQDN) (reconfigure-accept) (option-request DNS-server DNS-search-list SNTP-servers Client-FQDN opt_82 opt_83))
11:57:03.837809 PPPoE  [ses 0x1807] IP6 (class 0xc0, hlim 64, next-header UDP (17) payload length: 145) fe80::230:88ff:fe04:63c9.547 > fe80::43e:1a93:9ba2:3ac9.546: [udp sum ok] dhcp6 advertise (xid=578d35 (client-ID hwaddr/time type 1 time 562408048 024a06419271) (server-ID hwaddr/time type 1 time 560161841 0030880463c9) (IA_PD IAID:0 T1:43200 T2:69120 (IA_PD-prefix 2001:41d0:fe9d:1100::/56 pltime:86400 vltime:172800)) (DNS-server 2001:41d0:1:e2b8::1 2001:41d0:3:163::1 2001:41d0:1:e5e3::1))
11:57:03.839560 PPPoE  [ses 0x1807] IP6 (hlim 1, next-header UDP (17) payload length: 209) fe80::43e:1a93:9ba2:3ac9.65463 > ff02::1:2.547: [udp sum ok] dhcp6 request (xid=90bd91 (client-ID hwaddr/time type 1 time 562408048 024a06419271) (server-ID hwaddr/time type 1 time 560161841 0030880463c9) (elapsed-time 0) (vendor-class) (IA_PD IAID:0 T1:0 T2:0 (IA_PD-prefix 2001:41d0:fe9d:1100::/56 pltime:86400 vltime:172800)) (Client-FQDN) (reconfigure-accept) (option-request DNS-server DNS-search-list SNTP-servers Client-FQDN opt_82 opt_83))
11:57:03.849333 PPPoE  [ses 0x1807] IP6 (class 0xc0, hlim 64, next-header UDP (17) payload length: 145) fe80::230:88ff:fe04:63c9.547 > fe80::43e:1a93:9ba2:3ac9.546: [udp sum ok] dhcp6 reply (xid=90bd91 (client-ID hwaddr/time type 1 time 562408048 024a06419271) (server-ID hwaddr/time type 1 time 560161841 0030880463c9) (IA_PD IAID:0 T1:43200 T2:69120 (IA_PD-prefix 2001:41d0:fe9d:1100::/56 pltime:86400 vltime:172800)) (DNS-server 2001:41d0:1:e2b8::1 2001:41d0:3:163::1 2001:41d0:1:e5e3::1))




12:09:13.501129 PPPoE  [ses 0x47] IP6 (hlim 1, next-header UDP (17) payload length: 191) fe80::43e:1a93:9ba2:3ac9.65463 > ff02::1:2.547: [udp sum ok] dhcp6 rebind (xid=6da983 (client-ID hwaddr/time type 1 time 562408048 024a06419271) (elapsed-time 0) (vendor-class) (IA_PD IAID:0 T1:0 T2:0 (IA_PD-prefix 2001:41d0:fe9d:1100::/56 pltime:86400 vltime:172800)) (Client-FQDN) (reconfigure-accept) (option-request DNS-server DNS-search-list SNTP-servers Client-FQDN opt_82 opt_83))
12:09:14.501179 PPPoE  [ses 0x47] IP6 (hlim 1, next-header UDP (17) payload length: 191) fe80::43e:1a93:9ba2:3ac9.65463 > ff02::1:2.547: [udp sum ok] dhcp6 rebind (xid=6da983 (client-ID hwaddr/time type 1 time 562408048 024a06419271) (elapsed-time 100) (vendor-class) (IA_PD IAID:0 T1:0 T2:0 (IA_PD-prefix 2001:41d0:fe9d:1100::/56 pltime:86400 vltime:172800)) (Client-FQDN) (reconfigure-accept) (option-request DNS-server DNS-search-list SNTP-servers Client-FQDN opt_82 opt_83))
12:09:16.461276 PPPoE  [ses 0x47] IP6 (hlim 1, next-header UDP (17) payload length: 191) fe80::43e:1a93:9ba2:3ac9.65463 > ff02::1:2.547: [udp sum ok] dhcp6 rebind (xid=6da983 (client-ID hwaddr/time type 1 time 562408048 024a06419271) (elapsed-time 296) (vendor-class) (IA_PD IAID:0 T1:0 T2:0 (IA_PD-prefix 2001:41d0:fe9d:1100::/56 pltime:86400 vltime:172800)) (Client-FQDN) (reconfigure-accept) (option-request DNS-server DNS-search-list SNTP-servers Client-FQDN opt_82 opt_83))
12:09:20.241395 PPPoE  [ses 0x47] IP6 (hlim 1, next-header UDP (17) payload length: 191) fe80::43e:1a93:9ba2:3ac9.65463 > ff02::1:2.547: [udp sum ok] dhcp6 rebind (xid=6da983 (client-ID hwaddr/time type 1 time 562408048 024a06419271) (elapsed-time 674) (vendor-class) (IA_PD IAID:0 T1:0 T2:0 (IA_PD-prefix 2001:41d0:fe9d:1100::/56 pltime:86400 vltime:172800)) (Client-FQDN) (reconfigure-accept) (option-request DNS-server DNS-search-list SNTP-servers Client-FQDN opt_82 opt_83))
12:09:24.021518 PPPoE  [ses 0x47] IP6 (hlim 1, next-header UDP (17) payload length: 191) fe80::43e:1a93:9ba2:3ac9.65463 > ff02::1:2.547: [udp sum ok] dhcp6 solicit (xid=cda4d2 (client-ID hwaddr/time type 1 time 562408048 024a06419271) (elapsed-time 0) (vendor-class) (IA_PD IAID:0 T1:0 T2:0 (IA_PD-prefix 2001:41d0:fe9d:1100::/56 pltime:86400 vltime:172800)) (Client-FQDN) (reconfigure-accept) (option-request DNS-server DNS-search-list SNTP-servers Client-FQDN opt_82 opt_83))
12:09:24.029676 PPPoE  [ses 0x47] IP6 (class 0xc0, hlim 64, next-header UDP (17) payload length: 145) fe80::230:88ff:fe04:63c9.547 > fe80::43e:1a93:9ba2:3ac9.546: [udp sum ok] dhcp6 advertise (xid=cda4d2 (client-ID hwaddr/time type 1 time 562408048 024a06419271) (server-ID hwaddr/time type 1 time 560161841 0030880463c9) (IA_PD IAID:0 T1:43200 T2:69120 (IA_PD-prefix 2001:41d0:fe9d:1100::/56 pltime:86400 vltime:172800)) (DNS-server 2001:41d0:1:e2b8::1 2001:41d0:3:163::1 2001:41d0:1:e5e3::1))
12:09:24.031519 PPPoE  [ses 0x47] IP6 (hlim 1, next-header UDP (17) payload length: 209) fe80::43e:1a93:9ba2:3ac9.65463 > ff02::1:2.547: [udp sum ok] dhcp6 request (xid=a86dd4 (client-ID hwaddr/time type 1 time 562408048 024a06419271) (server-ID hwaddr/time type 1 time 560161841 0030880463c9) (elapsed-time 0) (vendor-class) (IA_PD IAID:0 T1:0 T2:0 (IA_PD-prefix 2001:41d0:fe9d:1100::/56 pltime:86400 vltime:172800)) (Client-FQDN) (reconfigure-accept) (option-request DNS-server DNS-search-list SNTP-servers Client-FQDN opt_82 opt_83))
12:09:24.040917 PPPoE  [ses 0x47] IP6 (class 0xc0, hlim 64, next-header UDP (17) payload length: 145) fe80::230:88ff:fe04:63c9.547 > fe80::43e:1a93:9ba2:3ac9.546: [udp sum ok] dhcp6 reply (xid=a86dd4 (client-ID hwaddr/time type 1 time 562408048 024a06419271) (server-ID hwaddr/time type 1 time 560161841 0030880463c9) (IA_PD IAID:0 T1:43200 T2:69120 (IA_PD-prefix 2001:41d0:fe9d:1100::/56 pltime:86400 vltime:172800)) (DNS-server 2001:41d0:1:e2b8::1 2001:41d0:3:163::1 2001:41d0:1:e5e3::1))