30. IPv6 NDP Commands26430.IPv6 NDP CommandsIn IPv6, a protocol called NDP (Neighbor Discovery Protocol) is used toconfigure the global IP address of a device connected to the router.The router periodically sends packets called RA (Router Advertisement)to a specified interface. An RA packet includes parameters such asnetwork prefix and hop limit. A device receiving RA packets combinesthe network prefix and its link-local address to create an IPv6 address.The transmission source of RA packets is managed as a default router.Device information with the address added is registered in a NDP tablein the router.In this chapter, you will display/delete a NDP table and register itemsmanually. You will also configure parameters about RA operations.30.1. create ipv6 neighbor_cache ipif DescriptionThis command is used to add a static neighbor on an IPv6 interface. Formatcreate ipv6 neighbor_cache ipif Parameterscreate ipv6 neighbor_cache ipif delete ipv6 neighbor_cache ipif [ | all] [ | static | dynamic | all]show ipv6 neighbor_cache ipif [ | all] [ipv6address | static | dynamic |all] {hardware}config ipv6 nd ns ipif retrans_time config ipv6 nd ra ipif {state [enable | disable] | life_time |reachable_time | retrans_time |hop_limit | managed_flag [enable | disable] | other_config_flag [enable |disable] | min_rtr_adv_interval | max_rtr_adv_interval }(1)config ipv6 nd ra prefix_option ipif {preferred_life_time 4294967295> | valid_life_time | on_link_flag [enable | disable] |autonomous_flag [enable | disable]}(1)show ipv6 nd {ipif }Specify the interface's name.
