使用光猫拨号的时候获取 /60 前缀正常, 改为桥接后所有路由器都获取不到 v6, 只有 RA 通告的/64 地址, 使用 OpenWrt 抓包 DHCPv6 和 ICMPv6 后, 显示 BAS 一直在 DHCPv6 返回 NoAddrsAvail
root@OpenWrt:~# tcpdump -envi pppoe-wan "(icmp6 and ( ip6[40] == 133 or ip6[40] == 134 ) ) or udp port 546 or udp port 547"
tcpdump: listening on pppoe-wan, link-type LINUX_SLL (Linux cooked v1), snapshot length 262144 bytes
23:42:32.160020 Out ethertype IPv6 (0x86dd), length 191: (flowlabel 0xffb88, hlim 1, next-header UDP (17) payload length: 135) fe80::9a0d:49d4:4956:a561.546 > ff02::1:2.547: [udp sum ok] dhcp6 request (xid=96f00e (elapsed-time 1589) (option-request SIP-servers-domain SIP-servers-address DNS-server DNS-search-list SNTP-servers NTP-server AFTR-Name opt_67 opt_94 opt_95 opt_96) (client-ID hwaddr type 1 9a0d4956a560) (server-ID hwaddr type 1 d4c1c890e450) (reconfigure-accept) (Client-FQDN) (IA_PD IAID:1 T1:0 T2:0 (IA_PD-prefix 2409:8a34:2063:a490::/60 pltime:3600 vltime:3600)))
23:42:47.490213 Out ethertype IPv6 (0x86dd), length 64: (flowlabel 0xd155c, hlim 255, next-header ICMPv6 (58) payload length: 8) fe80::9a0d:49d4:4956:a561 > ff02::2: [icmp6 sum ok] ICMP6, router solicitation, length 8
23:42:47.495447 In ethertype IPv6 (0x86dd), length 160: (class 0xe0, hlim 255, next-header ICMPv6 (58) payload length: 104) fe80::d6c1:c8ff:fe90:e450 > fe80::9a0d:49d4:4956:a561: [icmp6 sum ok] ICMP6, router advertisement, length 104
hop limit 64, Flags [other stateful], pref medium, router lifetime 1800s, reachable time 0ms, retrans timer 0ms
source link-address option (1), length 8 (1): d4:c1:c8:90:e4:50
mtu option (5), length 8 (1): 1492
rdnss option (25), length 40 (5): lifetime 4294967295s, addr: 2409:8034:2000::2 addr: 2409:8034:2000::1
prefix info option (3), length 32 (4): 2409:8a34:2006:90e::/64, Flags [onlink, auto], valid time 2592000s, pref. time 604800s
23:42:48.408093 Out ethertype IPv6 (0x86dd), length 166: (flowlabel 0xffb88, hlim 1, next-header UDP (17) payload length: 110) fe80::9a0d:49d4:4956:a561.546 > ff02::1:2.547: [udp sum ok] dhcp6 solicit (xid=6ba25f (elapsed-time 0) (option-request SIP-servers-domain SIP-servers-address DNS-server DNS-search-list SNTP-servers NTP-server AFTR-Name opt_67 opt_94 opt_95 opt_96 opt_82) (client-ID hwaddr type 1 9a0d4956a560) (reconfigure-accept) (Client-FQDN) (IA_NA IAID:1 T1:0 T2:0) (IA_PD IAID:1 T1:0 T2:0))
23:42:48.516862 In ethertype IPv6 (0x86dd), length 227: (hlim 64, next-header UDP (17) payload length: 171) fe80::d6c1:c8ff:fe90:e450.547 > fe80::9a0d:49d4:4956:a561.546: [udp sum ok] dhcp6 advertise (xid=6ba25f (server-ID hwaddr type 1 d4c1c890e450) (client-ID hwaddr type 1 9a0d4956a560) (IA_NA IAID:1 T1:0 T2:0 (status-code NoAddrsAvail)) (IA_PD IAID:1 T1:1800 T2:2880 (IA_PD-prefix 2409:8a34:2063:2970::/60 pltime:3600 vltime:3600) (status-code Success)) (DNS-server 2409:8034:2000::2 2409:8034:2000::1) (reconfigure-accept))
23:42:49.820161 Out ethertype IPv6 (0x86dd), length 150: (flowlabel 0xffb88, hlim 1, next-header UDP (17) payload length: 94) fe80::9a0d:49d4:4956:a561.546 > ff02::1:2.547: [udp sum ok] dhcp6 solicit (xid=96d7a6 (elapsed-time 0) (option-request SIP-servers-domain SIP-servers-address DNS-server DNS-search-list SNTP-servers NTP-server AFTR-Name opt_67 opt_94 opt_95 opt_96 opt_82) (client-ID hwaddr type 1 9a0d4956a560) (reconfigure-accept) (Client-FQDN) (IA_PD IAID:1 T1:0 T2:0))
23:42:49.826046 In ethertype IPv6 (0x86dd), length 194: (hlim 64, next-header UDP (17) payload length: 138) fe80::d6c1:c8ff:fe90:e450.547 > fe80::9a0d:49d4:4956:a561.546: [udp sum ok] dhcp6 advertise (xid=96d7a6 (server-ID hwaddr type 1 d4c1c890e450) (client-ID hwaddr type 1 9a0d4956a560) (IA_PD IAID:1 T1:1800 T2:2880 (IA_PD-prefix 2409:8a34:2063:2970::/60 pltime:3600 vltime:3600) (status-code Success)) (DNS-server 2409:8034:2000::2 2409:8034:2000::1) (reconfigure-accept))
23:42:51.426265 Out ethertype IPv6 (0x86dd), length 191: (flowlabel 0xffb88, hlim 1, next-header UDP (17) payload length: 135) fe80::9a0d:49d4:4956:a561.546 > ff02::1:2.547: [udp sum ok] dhcp6 request (xid=a3af09 (elapsed-time 0) (option-request SIP-servers-domain SIP-servers-address DNS-server DNS-search-list SNTP-servers NTP-server AFTR-Name opt_67 opt_94 opt_95 opt_96) (client-ID hwaddr type 1 9a0d4956a560) (server-ID hwaddr type 1 d4c1c890e450) (reconfigure-accept) (Client-FQDN) (IA_PD IAID:1 T1:0 T2:0 (IA_PD-prefix 2409:8a34:2063:2970::/60 pltime:3600 vltime:3600)))
23:42:52.511987 Out ethertype IPv6 (0x86dd), length 191: (flowlabel 0xffb88, hlim 1, next-header UDP (17) payload length: 135) fe80::9a0d:49d4:4956:a561.546 > ff02::1:2.547: [udp sum ok] dhcp6 request (xid=a3af09 (elapsed-time 108) (option-request SIP-servers-domain SIP-servers-address DNS-server DNS-search-list SNTP-servers NTP-server AFTR-Name opt_67 opt_94 opt_95 opt_96) (client-ID hwaddr type 1 9a0d4956a560) (server-ID hwaddr type 1 d4c1c890e450) (reconfigure-accept) (Client-FQDN) (IA_PD IAID:1 T1:0 T2:0 (IA_PD-prefix 2409:8a34:2063:2970::/60 pltime:3600 vltime:3600)))
23:42:54.816007 Out ethertype IPv6 (0x86dd), length 191: (flowlabel 0xffb88, hlim 1, next-header UDP (17) payload length: 135) fe80::9a0d:49d4:4956:a561.546 > ff02::1:2.547: [udp sum ok] dhcp6 request (xid=a3af09 (elapsed-time 339) (option-request SIP-servers-domain SIP-servers-address DNS-server DNS-search-list SNTP-servers NTP-server AFTR-Name opt_67 opt_94 opt_95 opt_96) (client-ID hwaddr type 1 9a0d4956a560) (server-ID hwaddr type 1 d4c1c890e450) (reconfigure-accept) (Client-FQDN) (IA_PD IAID:1 T1:0 T2:0 (IA_PD-prefix 2409:8a34:2063:2970::/60 pltime:3600 vltime:3600)))
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