Ik heb even een uurtje gemeten:
admin@USG:~$ sudo tcpdump -vv -n -i eth0.34 '(udp port 546 and udp port 547)'
tcpdump: listening on eth0.34, link-type EN10MB (Ethernet), capture size 262144 bytes
11:32:25.195119 IP6 (hlim 1, next-header UDP (17) payload length: 106) fe80::REDACTED:USG::ETH0.34:IP.546 > ff02::1:2.547: [udp sum ok] dhcp6 renew (xid=1dc192 (client-ID hwaddr/time type 1 time 642422375 Mijn MAC) (server-ID hwaddr/time type 8 time 1636402003 00163e8f0d9b) (IA_NA IAID:0 T1:1000 T2:2000 (IA_ADDR 2a02:58:1:d::15 pltime:1800 vltime:3600)) (elapsed-time 0) (option-request DNS-server DNS-search-list))
11:32:25.281410 IP6 (flowlabel 0x189c2, hlim 64, next-header UDP (17) payload length: 128) fe80::6863:fcff:fe33:b141.547 > fe80::REDACTED:USG::ETH0.34:IP.546: [udp sum ok] dhcp6 reply (xid=1dc192 (client-ID hwaddr/time type 1 time 642422375 Mijn MAC) (server-ID hwaddr/time type 8 time 1636402003 00163e8f0d9b) (IA_NA IAID:0 T1:1000 T2:2000 (IA_ADDR 2a02:58:1:d::15 pltime:1800 vltime:3600)) (DNS-server 2a02:58:2:1:53::1 2a02:58:2:1:53::2))
11:32:27.006283 IP6 (hlim 1, next-header UDP (17) payload length: 107) fe80::REDACTED:USG::ETH0.34:IP.546 > ff02::1:2.547: [udp sum ok] dhcp6 renew (xid=32d26c (client-ID hwaddr/time type 1 time 642422375 Mijn MAC) (server-ID hwaddr/time type 8 time 1636402003 00163e8f0d9b) (elapsed-time 0) (option-request DNS-server DNS-search-list) (IA_PD IAID:0 T1:1000 T2:2000 (IA_PD-prefix 2a02:58:TERUGKOMENDE-PREFIX::/56 pltime:1800 vltime:3600)))
11:32:27.044688 IP6 (flowlabel 0x05c1e, hlim 64, next-header UDP (17) payload length: 129) fe80::6863:fcff:fe33:b141.547 > fe80::REDACTED:USG::ETH0.34:IP.546: [udp sum ok] dhcp6 reply (xid=32d26c (client-ID hwaddr/time type 1 time 642422375 Mijn MAC) (server-ID hwaddr/time type 8 time 1636402003 00163e8f0d9b) (DNS-server 2a02:58:2:1:53::1 2a02:58:2:1:53::2) (IA_PD IAID:0 T1:1000 T2:2000 (IA_PD-prefix 2a02:58:TERUGKOMENDE-PREFIX::/56 pltime:1800 vltime:3600)))
11:48 stuk - iets eerder mogelijk al.
Verbinding weer terug exact als de dhcp6 renew is geweest:
11:49:05.374993 IP6 (hlim 1, next-header UDP (17) payload length: 106) fe80::REDACTED:USG::ETH0.34:IP.546 > ff02::1:2.547: [udp sum ok] dhcp6 renew (xid=b9654a (client-ID hwaddr/time type 1 time 642422375 Mijn MAC) (server-ID hwaddr/time type 8 time 1636402003 00163e8f0d9b) (IA_NA IAID:0 T1:1000 T2:2000 (IA_ADDR 2a02:58:1:d::15 pltime:1800 vltime:3600)) (elapsed-time 0) (option-request DNS-server DNS-search-list))
11:49:05.443113 IP6 (flowlabel 0xf7041, hlim 64, next-header UDP (17) payload length: 128) fe80::6863:fcff:fe33:b141.547 > fe80::REDACTED:USG::ETH0.34:IP.546: [udp sum ok] dhcp6 reply (xid=b9654a (client-ID hwaddr/time type 1 time 642422375 Mijn MAC) (server-ID hwaddr/time type 8 time 1636402003 00163e8f0d9b) (IA_NA IAID:0 T1:1000 T2:2000 (IA_ADDR 2a02:58:1:d::15 pltime:1800 vltime:3600)) (DNS-server 2a02:58:2:1:53::1 2a02:58:2:1:53::2))
11:49:07.147879 IP6 (hlim 1, next-header UDP (17) payload length: 107) fe80::REDACTED:USG::ETH0.34:IP.546 > ff02::1:2.547: [udp sum ok] dhcp6 renew (xid=4f7919 (client-ID hwaddr/time type 1 time 642422375 Mijn MAC) (server-ID hwaddr/time type 8 time 1636402003 00163e8f0d9b) (elapsed-time 0) (option-request DNS-server DNS-search-list) (IA_PD IAID:0 T1:1000 T2:2000 (IA_PD-prefix 2a02:58:TERUGKOMENDE-PREFIX::/56 pltime:1800 vltime:3600)))
11:49:07.220601 IP6 (flowlabel 0x3ce05, hlim 64, next-header UDP (17) payload length: 129) fe80::6863:fcff:fe33:b141.547 > fe80::REDACTED:USG::ETH0.34:IP.546: [udp sum ok] dhcp6 reply (xid=4f7919 (client-ID hwaddr/time type 1 time 642422375 Mijn MAC) (server-ID hwaddr/time type 8 time 1636402003 00163e8f0d9b) (DNS-server 2a02:58:2:1:53::1 2a02:58:2:1:53::2) (IA_PD IAID:0 T1:1000 T2:2000 (IA_PD-prefix 2a02:58:TERUGKOMENDE-PREFIX::/56 pltime:1800 vltime:3600)))
12:05:45.545004 IP6 (hlim 1, next-header UDP (17) payload length: 106) fe80::REDACTED:USG::ETH0.34:IP.546 > ff02::1:2.547: [udp sum ok] dhcp6 renew (xid=e18749 (client-ID hwaddr/time type 1 time 642422375 Mijn MAC) (server-ID hwaddr/time type 8 time 1636402003 00163e8f0d9b) (IA_NA IAID:0 T1:1000 T2:2000 (IA_ADDR 2a02:58:1:d::15 pltime:1800 vltime:3600)) (elapsed-time 0) (option-request DNS-server DNS-search-list))
12:05:45.605669 IP6 (flowlabel 0x44824, hlim 64, next-header UDP (17) payload length: 128) fe80::6863:fcff:fe33:b141.547 > fe80::REDACTED:USG::ETH0.34:IP.546: [udp sum ok] dhcp6 reply (xid=e18749 (client-ID hwaddr/time type 1 time 642422375 Mijn MAC) (server-ID hwaddr/time type 8 time 1636402003 00163e8f0d9b) (IA_NA IAID:0 T1:1000 T2:2000 (IA_ADDR 2a02:58:1:d::15 pltime:1800 vltime:3600)) (DNS-server 2a02:58:2:1:53::1 2a02:58:2:1:53::2))
12:05:47.472024 IP6 (hlim 1, next-header UDP (17) payload length: 107) fe80::REDACTED:USG::ETH0.34:IP.546 > ff02::1:2.547: [udp sum ok] dhcp6 renew (xid=b4f5b6 (client-ID hwaddr/time type 1 time 642422375 Mijn MAC) (server-ID hwaddr/time type 8 time 1636402003 00163e8f0d9b) (elapsed-time 0) (option-request DNS-server DNS-search-list) (IA_PD IAID:0 T1:1000 T2:2000 (IA_PD-prefix 2a02:58:TERUGKOMENDE-PREFIX::/56 pltime:1800 vltime:3600)))
12:05:47.602520 IP6 (flowlabel 0x8c0c1, hlim 64, next-header UDP (17) payload length: 129) fe80::6863:fcff:fe33:b141.547 > fe80::REDACTED:USG::ETH0.34:IP.546: [udp sum ok] dhcp6 reply (xid=b4f5b6 (client-ID hwaddr/time type 1 time 642422375 Mijn MAC) (server-ID hwaddr/time type 8 time 1636402003 00163e8f0d9b) (DNS-server 2a02:58:2:1:53::1 2a02:58:2:1:53::2) (IA_PD IAID:0 T1:1000 T2:2000 (IA_PD-prefix 2a02:58:TERUGKOMENDE-PREFIX::/56 pltime:1800 vltime:3600)))
12:22:25.708779 IP6 (hlim 1, next-header UDP (17) payload length: 106) fe80::REDACTED:USG::ETH0.34:IP.546 > ff02::1:2.547: [udp sum ok] dhcp6 renew (xid=59562d (client-ID hwaddr/time type 1 time 642422375 Mijn MAC) (server-ID hwaddr/time type 8 time 1636402003 00163e8f0d9b) (IA_NA IAID:0 T1:1000 T2:2000 (IA_ADDR 2a02:58:1:d::15 pltime:1800 vltime:3600)) (elapsed-time 0) (option-request DNS-server DNS-search-list))
12:22:25.776405 IP6 (flowlabel 0x8f344, hlim 64, next-header UDP (17) payload length: 128) fe80::6863:fcff:fe33:b141.547 > fe80::REDACTED:USG::ETH0.34:IP.546: [udp sum ok] dhcp6 reply (xid=59562d (client-ID hwaddr/time type 1 time 642422375 Mijn MAC) (server-ID hwaddr/time type 8 time 1636402003 00163e8f0d9b) (IA_NA IAID:0 T1:1000 T2:2000 (IA_ADDR 2a02:58:1:d::15 pltime:1800 vltime:3600)) (DNS-server 2a02:58:2:1:53::1 2a02:58:2:1:53::2))
12:22:27.605835 IP6 (hlim 1, next-header UDP (17) payload length: 107) fe80::REDACTED:USG::ETH0.34:IP.546 > ff02::1:2.547: [udp sum ok] dhcp6 renew (xid=69a487 (client-ID hwaddr/time type 1 time 642422375 Mijn MAC) (server-ID hwaddr/time type 8 time 1636402003 00163e8f0d9b) (elapsed-time 0) (option-request DNS-server DNS-search-list) (IA_PD IAID:0 T1:1000 T2:2000 (IA_PD-prefix 2a02:58:TERUGKOMENDE-PREFIX::/56 pltime:1800 vltime:3600)))
12:22:27.763402 IP6 (flowlabel 0xf86a3, hlim 64, next-header UDP (17) payload length: 129) fe80::6863:fcff:fe33:b141.547 > fe80::REDACTED:USG::ETH0.34:IP.546: [udp sum ok] dhcp6 reply (xid=69a487 (client-ID hwaddr/time type 1 time 642422375 Mijn MAC) (server-ID hwaddr/time type 8 time 1636402003 00163e8f0d9b) (DNS-server 2a02:58:2:1:53::1 2a02:58:2:1:53::2) (IA_PD IAID:0 T1:1000 T2:2000 (IA_PD-prefix 2a02:58:TERUGKOMENDE-PREFIX::/56 pltime:1800 vltime:3600)))
^C
16 packets captured
16 packets received by filter
0 packets dropped by kernel
Ik zou bijna zeggen als je niet regelmatig een dhcp6 renew
stuurt dat het dan stuk gaat.
Mede ook omdat een een release en renew het oplost.
Al zou dat niet dienen uitmaken als het maar eens per uur hoeft te gebeuren …
Pingen naar link-local van de router gaat probleemloos voor een uur:
--- fe80::6863:fcff:fe33:b141%eth0.34 ping statistics ---
3781 packets transmitted, 3781 received, 0% packet loss, time 3784900ms
rtt min/avg/max/mdev = 3.599/3.760/6.763/0.112 ms
Pingen naar Google onderbreekt dus wel over IPv6. Het rare is dat je dit met tcpdump wel naar buiten ziet gaan, maar dus niets op terug komt:
--- google.com ping statistics ---
3913 packets transmitted, 3167 received, 19% packet loss, time 3946709ms
rtt min/avg/max/mdev = 4.716/5.050/22.135/0.449 ms
De aangemaakt config van /var/run/dhcp6c-eth0.34-pd.conf
is btw niet heel boeiend op de USG3:
# This file was auto-generated by /opt/vyatta/sbin/dhcpv6-pd-client.pl
# configuration sub-system. Do not edit it.
interface eth0.34 {
send ia-na 0;
request domain-name-servers, domain-name;
send rapid-commit;
send ia-pd 0;
script "/opt/vyatta/sbin/ubnt-dhcp6c-script";
};
id-assoc na 0 {};
id-assoc pd 0 {
prefix ::/56 infinity;
prefix-interface eth1 {
sla-id 8;
sla-len 8;
};
prefix-interface eth2 {
sla-id 22;
sla-len 8;
};
};