Shortened tcpdumps, can send full dumps by PM if necessary
35.73.0.50:
Code:
# IPv6 router solicitation
10:55:52.673427 IP6 fe80::215:65ff:fe6e:b26c > ff02::2: ICMP6, router solicitation, length 16
10:55:54.765707 IP6 fe80::a0ca:39ff:fe00:6 > ff02::1: ICMP6, router advertisement, length 64
# Also sending stateful DHCPv6 request and not getting an address back
10:56:19.480564 IP6 fe80::215:65ff:fe6e:b26c.546 > ff02::1:2.547: dhcp6 solicit
# AAAA DNS queries over IPv4 transport (DNS servers assigned by DHCPv4) for both identities
10:56:51.332658 IP 192.0.2.205.56151 > 10.156.33.53.53: 10118+ AAAA? voip-fs.domain. (41)
10:56:51.333535 IP 10.156.33.53.53 > 192.0.2.205.56151: 10118* 1/4/7 AAAA 2001:db8:0:101::81bb:a21 (311)
10:56:51.511671 IP 192.0.2.205.55334 > 10.156.33.53.53: 42611+ AAAA? secureV6.dus.net. (34)
10:56:51.512742 IP 10.156.33.53.53 > 192.0.2.205.55334: 42611 1/4/6 AAAA 2a04:2100:0:100::73 (273)
# SIP/TLS Connection established over IPv6 to both identities
10:56:51.542807 IP6 2001:db8:0:ff00:215:65ff:fe6e:b26c.54067 > 2001:db8:0:101::81bb:a21.5061: Flags [S], seq 3913542321, win 5760, options [mss 1440,sackOK,TS val 4294944410 ecr 0,nop,wscale 2], length 0
10:56:51.725958 IP6 2001:db8:0:ff00:215:65ff:fe6e:b26c.54063 > 2a04:2100:0:100::73.5061: Flags [S], seq 4088716600, win 5760, options [mss 1440,sackOK,TS val 4294944429 ecr 0,nop,wscale 2], length 0
Compare this to 35.80.0.125:
Code:
# Router solicitation
10:42:49.141320 IP6 fe80::215:65ff:fe6e:b26c > ff02::2: ICMP6, router solicitation, length 16
10:42:49.255058 IP6 fe80::a0ca:39ff:fe00:6 > ff02::1: ICMP6, router advertisement, length 64
# Stateful DHCPv6
10:42:52.060120 IP6 fe80::215:65ff:fe6e:b26c.546 > ff02::1:2.547: dhcp6 solicit
# A DNS query for first identity, connect via IPv4
10:43:19.746376 IP 192.0.2.205.49881 > 10.156.33.53.53: 38900+ A? voip-fs.domain. (41)
10:43:19.747409 IP 10.156.33.53.53 > 192.0.2.205.49881: 38900* 1/4/7 A 192.0.10.33 (299)
10:43:19.752635 IP 192.0.2.205.11880 > 192.0.10.33.5061: Flags [S], seq 3550190186, win 5840, options [mss 1460,sackOK,TS val 4294944634 ecr 0,nop,wscale 2], length 0
# A DNS query for second identity (IPv6-only), getting NODATA, not connecting at all
10:43:19.940542 IP 192.0.2.205.37345 > 10.156.33.53.53: 12679+ A? secureV6.dus.net. (34)
10:43:19.941247 IP 10.156.33.53.53 > 192.0.2.205.37345: 12679 0/1/0 (94)
So basically
- both versions are (wrongly) attempting stateful DHCPv6 when stateless DHCPv6/SLAAC are advertised
- SLAAC should be a third option for network.ipv6_internet_port.type =
- or better: SLAAC/stateless DHCPv6 vs. stateful DHCPv6 should be autodetected from router advertisement
- 35.73.* uses IPv6 from SLAAC even if no DHCPv6 lease is received
- 35.80.* does not use IPv6
It might possibly use IPv6 if a stateful address is assigned, I'll test that later.[/code]
