Dynamic ARP Inspection (DAI) is enabled in a VLAN or on a physical interface in the VLAN, and VLANIF interfaces are configured in the VLAN. To successfully ping the IP address of the VLANIF interface from the VLAN or the physical interface in the VLAN, the source IP address of the ping packet must match an entry in the DHCP snooping binding table.

        Whether the IP address of the VLANIF interface can be successfully pinged differs in different versions.

•  In all versions, the IP address of a VLANIF interface in a DAI-enabled VLAN can be successfully pinged if the source IP address of the ping packet matches an entry in the static DHCP snooping binding table.
•  If the source IP address of the ping packet matches an entry in the dynamic DHCP snooping binding table, the IP address of a VLANIF interface in a DAI-enabled VLAN can be successfully pinged in earlier versions of V100R005, but cannot be pinged in V100R005 and later versions.