nd-miss message-cache disable
Function
The nd-miss message-cache disable command disables the ND Miss message sending function.
The undo nd-miss message-cache disable command enables the ND Miss message sending function.
By default, the ND Miss message sending function is enabled.
Only the S5720-HI, S5730-HI, S5731-H, S5731-S, S5731S-H, S5731S-S, S5732-H, S6720-HI, S6730-H, S6730S-H, S6730-S, and S6730S-S support this command.
Usage Guidelines
If a user sends an IPv6 packet with an irresolvable destination IPv6 address to the device (that is, if the device has a route to the destination IPv6 address of the IPv6 packet but has no ND entry matching the next hop of the route), the device generates an ND Miss message. By default, the device sends the ND Miss messages to the CPU. This improves the efficiency of processing the ND Miss messages.
When the ND Miss message sending function is enabled, an device cannot reply to ICMPv6 host unreachable packets. To enable the device to reply to ICMPv6 host unreachable packets, you can run the nd-miss message-cache disable command to disable the ND Miss message sending function.