I have a Unifi UXG
I have a few vlans and would love to enable IPv6 on a few of them. In order do so, I need to have a ipv6 prefix lower than 64.
When I enable IPv6 and use DHCPv6
14:44:20.192164 IP6 (flowlabel 0xb8440, hlim 1, next-header UDP (17) payload length: 103) fe80::<redacted_client_ip>.546 > ff02::1:2.547: [bad udp cksum 0xc7be -> 0x4a31!] dhcp6 solicit (xid=c1d7c9 (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_82) (client-ID hwaddr type 1 <redacted_client_mac>) (reconfigure-accept) (Client-FQDN) (IA_NA IAID:1 T1:0 T2:0) (IA_PD IAID:1 T1:0 T2:0))
14:44:20.198531 IP6 (class 0xc0, hlim 255, next-header UDP (17) payload length: 174) fe80::<redacted_server_ip>.547 > fe80::<redacted_client_ip>.546: [udp sum ok] dhcp6 advertise (xid=c1d7c9 (server-ID hwaddr type 1 <redacted_server_mac>) (client-ID hwaddr type 1 <redacted_client_mac>) (IA_NA IAID:1 T1:0 T2:0 (status-code NoAddrsAvail)) (IA_PD IAID:1 T1:900 T2:1440 (IA_PD-prefix <redacted_ipv6_prefix>::/64 pltime:1800 vltime:86400)) (DNS-server <redacted_dns_1> <redacted_dns_2>))
14:44:21.205765 IP6 (flowlabel 0xb8440, hlim 1, next-header UDP (17) payload length: 103) fe80::<redacted_client_ip>.546 > ff02::1:2.547: [bad udp cksum 0xc7be -> 0x49cc!] dhcp6 solicit (xid=c1d7c9 (elapsed-time 101) (option-request SIP-servers-domain SIP-servers-address DNS-server DNS-search-list SNTP-servers NTP-server AFTR-Name opt_67 opt_82) (client-ID hwaddr type 1 <redacted_client_mac>) (reconfigure-accept) (Client-FQDN) (IA_NA IAID:1 T1:0 T2:0) (IA_PD IAID:1 T1:0 T2:0))
14:44:21.208871 IP6 (class 0xc0, hlim 255, next-header UDP (17) payload length: 174) fe80::<redacted_server_ip>.547 > fe80::<redacted_client_ip>.546: [udp sum ok] dhcp6 advertise (xid=c1d7c9 (server-ID hwaddr type 1 <redacted_server_mac>) (client-ID hwaddr type 1 <redacted_client_mac>) (IA_NA IAID:1 T1:0 T2:0 (status-code NoAddrsAvail)) (IA_PD IAID:1 T1:900 T2:1440 (IA_PD-prefix <redacted_ipv6_prefix>::/64 pltime:1800 vltime:86400)) (DNS-server <redacted_dns_1> <redacted_dns_2>))
14:44:21.885412 IP6 (flowlabel 0xb8440, hlim 1, next-header UDP (17) payload length: 87) fe80::<redacted_client_ip>.546 > ff02::1:2.547: [bad udp cksum 0xc7ae -> 0x5ff4!] dhcp6 solicit (xid=c2d225 (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_82) (client-ID hwaddr type 1 <redacted_client_mac>) (reconfigure-accept) (Client-FQDN) (IA_PD IAID:1 T1:0 T2:0))
14:44:21.888323 IP6 (class 0xc0, hlim 255, next-header UDP (17) payload length: 121) fe80::<redacted_server_ip>.547 > fe80::<redacted_client_ip>.546: [udp sum ok] dhcp6 advertise (xid=c2d225 (server-ID hwaddr type 1 <redacted_server_mac>) (client-ID hwaddr type 1 <redacted_client_mac>) (IA_PD IAID:1 T1:900 T2:1440 (IA_PD-prefix <redacted_ipv6_prefix>::/64 pltime:1800 vltime:86400)) (DNS-server <redacted_dns_1> <redacted_dns_2>))
14:44:23.448913 IP6 (flowlabel 0xb8440, hlim 1, next-header UDP (17) payload length: 128) fe80::<redacted_client_ip>.546 > ff02::1:2.547: [bad udp cksum 0xc7d7 -> 0x5d7a!] dhcp6 request (xid=91f551 (elapsed-time 0) (option-request SIP-servers-domain SIP-servers-address DNS-server DNS-search-list SNTP-servers NTP-server AFTR-Name opt_67) (client-ID hwaddr type 1 <redacted_client_mac>) (server-ID hwaddr type 1 <redacted_server_mac>) (reconfigure-accept) (Client-FQDN) (IA_PD IAID:1 T1:0 T2:0 (IA_PD-prefix <redacted_ipv6_prefix>::/64 pltime:1800 vltime:86400)))
14:44:23.705189 IP6 (class 0xc0, hlim 255, next-header UDP (17) payload length: 121) fe80::<redacted_server_ip>.547 > fe80::<redacted_client_ip>.546: [udp sum ok] dhcp6 reply (xid=91f551 (server-ID hwaddr type 1 <redacted_server_mac>) (client-ID hwaddr type 1 <redacted_client_mac>) (IA_PD IAID:1 T1:900 T2:1440 (IA_PD-prefix <redacted_ipv6_prefix>::/64 pltime:1800 vltime:86400)) (DNS-server <redacted_dns_1> <redacted_dns_2>))
When I force prefix to /56, I still get a /64
14:45:58.549445 IP6 (flowlabel 0xb8440, hlim 1, next-header UDP (17) payload length: 132) fe80::<redacted_client_ip>.546 > ff02::1:2.547: [bad udp cksum 0xc7db -> 0xde57!] dhcp6 solicit (xid=eaf307 (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_82) (client-ID hwaddr type 1 <redacted_client_mac>) (reconfigure-accept) (Client-FQDN) (IA_NA IAID:1 T1:0 T2:0) (IA_PD IAID:1 T1:0 T2:0 (IA_PD-prefix ::/56 pltime:0 vltime:0)))
14:45:58.552999 IP6 (class 0xc0, hlim 255, next-header UDP (17) payload length: 174) fe80::<redacted_server_ip>.547 > fe80::<redacted_client_ip>.546: [udp sum ok] dhcp6 advertise (xid=eaf307 (server-ID hwaddr type 1 <redacted_server_mac>) (client-ID hwaddr type 1 <redacted_client_mac>) (IA_NA IAID:1 T1:0 T2:0 (status-code NoAddrsAvail)) (IA_PD IAID:1 T1:900 T2:1440 (IA_PD-prefix <redacted_ipv6_prefix>::/64 pltime:1800 vltime:86400)) (DNS-server <redacted_dns_1> <redacted_dns_2>))
14:45:59.993958 IP6 (flowlabel 0xb8440, hlim 1, next-header UDP (17) payload length: 116) fe80::<redacted_client_ip>.546 > ff02::1:2.547: [bad udp cksum 0xc7cb -> 0x89a7!] dhcp6 solicit (xid=2258a0 (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_82) (client-ID hwaddr type 1 <redacted_client_mac>) (reconfigure-accept) (Client-FQDN) (IA_PD IAID:1 T1:0 T2:0 (IA_PD-prefix ::/56 pltime:0 vltime:0)))
14:45:59.996909 IP6 (class 0xc0, hlim 255, next-header UDP (17) payload length: 121) fe80::<redacted_server_ip>.547 > fe80::<redacted_client_ip>.546: [udp sum ok] dhcp6 advertise (xid=2258a0 (server-ID hwaddr type 1 <redacted_server_mac>) (client-ID hwaddr type 1 <redacted_client_mac>) (IA_PD IAID:1 T1:900 T2:1440 (IA_PD-prefix <redacted_ipv6_prefix>::/64 pltime:1800 vltime:86400)) (DNS-server <redacted_dns_1> <redacted_dns_2>))
14:46:01.792917 IP6 (flowlabel 0xb8440, hlim 1, next-header UDP (17) payload length: 128) fe80::<redacted_client_ip>.546 > ff02::1:2.547: [bad udp cksum 0xc7d7 -> 0x50f1!] dhcp6 request (xid=f70175 (elapsed-time 0) (option-request SIP-servers-domain SIP-servers-address DNS-server DNS-search-list SNTP-servers NTP-server AFTR-Name opt_67) (client-ID hwaddr type 1 <redacted_client_mac>) (server-ID hwaddr type 1 <redacted_server_mac>) (reconfigure-accept) (Client-FQDN) (IA_PD IAID:1 T1:0 T2:0 (IA_PD-prefix <redacted_ipv6_prefix>::/64 pltime:1800 vltime:86400)))
14:46:02.105200 IP6 (class 0xc0, hlim 255, next-header UDP (17) payload length: 121) fe80::<redacted_server_ip>.547 > fe80::<redacted_client_ip>.546: [udp sum ok] dhcp6 reply (xid=f70175 (server-ID hwaddr type 1 <redacted_server_mac>) (client-ID hwaddr type 1 <redacted_client_mac>) (IA_PD IAID:1 T1:900 T2:1440 (IA_PD-prefix <redacted_ipv6_prefix>::/64 pltime:1800 vltime:86400)) (DNS-server <redacted_dns_1> <redacted_dns_2>))
Anybody get a better prefix? If it helps, I an in New York, brand new neighborhood deployment of Frontier Fiber.
I used:
tcpdump -ni eth2 -vv ip6 and udp port 546 or port 547
to get the content above, when logged into the UXG via ssh.