Whether S series switches support DAD check for IPv6 link-local addresses

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S7700 and S9700 series modular switches in V200R001 and later version support this function, but earlier versions do not.
S9300 V200R100 supports this function, but earlier versions do not.
S series fixed switches support this function.

Other related questions:
What is the application scope of an IPv6 link-local address
An IPv6 link-local address can be used for communication between nodes on the same link. Packets with IPv6 link-local addresses can be forwarded only through a local link.

Whether S series switches support IPv6
The IPv6 function of S series modular switches is controlled by a license. By default, the IPv6 function is disabled on a new switch. To use the IPv6 function, apply for and purchase the license from the equipment supplier. - For details about products and versions of the S12700 sereis switches supporting IPv6, see Basic IPv6. - For details about products and versions of the S7700&S9700 sereis switches supporting IPv6, see Basic IPv6. - For details about products and versions of the S9300 sereis switches supporting IPv6, see Basic IPv6. - For details about products and versions of fixed switches supporting IPv6, see Basic IPv6.

Whether the DHCP function of S series switch support static IP address check
After DHCP snooping is configured, S series switches do not check static IP addresses by default. You can enable the IPSG function and configure static binding entries to enable the static IP address check function.

Types of packets checked by S series switches with IPSG enabled
For S series switches (except S1700 switches), IPSG takes effect only for IP packets (except DHCP packets) but not for packets of other types such as ARP or PPPoE. With IPSG enabled, an S series switch checks only IPv4 packets in versions earlier than V200R001 and checks all IPv4 and IPv6 packets in V200R001 and later versions.

Whether IPv6 addresses are supported in region configuration
Only IPv4 addresses are supported.

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