After receiving an NS packet from a user, a device can generate a dynamic ND snooping binding entry only after the value of the Target Address field in the packet matches the user's prefix management entry. The device obtains an RA packet received from an ND snooping trusted interface and automatically generates a prefix management entry based on the RA packet. However, if a gateway device does not send RA packets, the device cannot automatically generate a prefix management entry and then cannot establish a corresponding dynamic ND snooping binding entry, affecting services. To solve this problem, you can perform the following operations to manually configure a prefix management entry.
You can run the display nd snooping prefix command to check all the prefix management entries including those statically configured and dynamically generated on the device. The total number of statically configured and dynamically generated prefix management entries cannot exceed the maximum number of entries allowed on a device. Otherwise, no prefix management entry can be further statically configured or dynamically generated.