Ca c'est le solicit de l'UDM:
19:19:23.037026 IP6 (flowlabel 0x79f26, hlim 1, next-header UDP (17) payload length: 138) fe80::72a7:41ff:fe7b:707b.546 > ff02::1:2.547: [bad udp cksum 0x21c0 -> 0xf927!] dhcp6 solicit (xid=d53cba (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 70a7417b707b) (reconfigure-accept) (Client-FQDN) (IA_NA IAID:1 T1:0 T2:0) (IA_PD IAID:1 T1:0 T2:0 (IA_PD-prefix ::/64 pltime:0 vltime:0)))
Ca celui de l'ER4 sans le rapid-commit
27:28.562793 IP6 (flowlabel 0x64ca6, hlim 1, next-header UDP (17) payload length: 105) fe80::6ad7:9aff:fe49:ff8e.546 > ff02::1:2.547: [udp sum ok] dhcp6 solicit (xid=f25245 (client-ID hwaddr/time type 1 time 733061955 68d79a49ff8d) (IA_NA IAID:0 T1:0 T2:0) (elapsed-time 13435) (option-request DNS-server DNS-search-list) (IA_PD IAID:0 T1:0 T2:0 (IA_PD-prefix ::/64 pltime:4294967295 vltime:4294967295)))
l'UDM demande plus d'options, IAID à 1 au lieu de 0 (mais ça ne devrait rien changer ...) par contre y'a les options reconfigure-accept et Client-FQDN ...