An Authorized Host Cannot Go Online Due to an Incorrect Static Binding Entry

Procedure

1. Check whether the binding entry is correct.

   Run the display dhcp static user-bind { { interface interface-type interface-number | ip-address ip-address | mac-address mac-address | vlan vlan-id } ^* | all } command to view static binding entries.

   An incorrect binding entry may prevent the authorized host from going online.

   • If the binding entry of the host is not in the binding table, add the host's binding entry to the binding table. The switch allows the packets from a host to pass only when the host's binding entry exists in the binding table.

   • If the host's binding entry exists in the binding table, check whether the MAC address in the entry is the same as the host's MAC address. If the network card of the host is replaced, the MAC address in the entry may not be updated in a timely manner. In this case, delete the entry and configure a new binding entry for the host.

   • If the host's binding entry exists in the binding table, check whether the entry contains VLAN information. In this case, run the display vlan command to check whether the interface connected to the host has been added to the VLAN. The switch allows the packets from a host to pass only when the interface connected to this host has been added to the VLAN.

   To add a binding entry, run the user-bind static { { { ip-address | ipv6-address } { start-ip [ to end-ip ] } &<1-10> | ipv6-prefix prefix/prefix-length } | mac-address mac-address } ^* [ interface interface-type interface-number ] [ vlan vlan-id [ ce-vlan ce-vlan-id ] ] command.

   To delete a binding entry, run the undo user-bind static [ { { ip-address | ipv6-address } { start-ip [ to end-ip ] } &<1-10> | ipv6-prefix prefix/prefix-length } | mac-address mac-address | interface interface-type interface-number | vlan vlan-id [ ce-vlan ce-vlan-id ] ] ^* command.