The DSLAM MA5616, V800R310C00SPC101 configured with security anti-ipv6spoofing discards the replay packets from DHCPv6 server.
A:Packet and protocol analyze.
Use wiresharck to capture packets and check why the replay packets from DHCPv6 server are discarded.
The Huawei equipment supports the prefix-length from 48 to 64 when it is used security anti-ipv6spoofing.
Suggestion : Reconfigure the prefix-length of DHCPv6 server witch was configured to send a prefix-length of 96.