The main subtree for multicast management, following functionalities included. -- Protocol-based rate limiting for packets from user-side -- CPU defend management -- Anti-attack management -- ACL management -- MAC anti-spoofing management -- User isolation in layer 2 switch -- Layer 3 security management -- DHCP snooping and IP source guard -- DHCP test -- DHCP filtering -- ARP -- Port identification, such as DHCP option82, PPPoE intermediate agent, VMAC etc. -- DHCP layer 2 relay agent -- NDP line identification option(NDP-LIO) management -- ND snooping management -- NS management -- 802.1X PAE management -- Access service profile -- PPPoE test -- PPPoE filter