855Parameter prefix-length: Prefix length of an IPv6 address.ipv6-prefix: IPv6 address prefix.valid-lifetime: Valid lifetime of a prefix in seconds, in the range of 0 to4,294,967,295.preferred-lifetime: Preferred lifetime of a prefix used for statelessautoconfiguration in seconds, in the range of 0 to 4,294,967,295.no-autoconfig: Specifies a prefix not to be used for stateless autoconfiguration. Ifthis keyword is not provided, the prefix is used for stateless autoconfiguration.off-link: Specifies the address with the prefix not to be directly reachable on thelink. If this keyword is not provided, the address with the prefix is directlyreachable on the link.Description Use the ipv6 nd ra prefix command to configure the prefix information in RAmessages.Use the undo ipv6 nd ra prefix command to remove the prefix informationfrom RA messages.By default, no prefix information is configured in RA messages and the IPv6address of the interface sending RA messages is used as the prefix information.Example # Configure the prefix information for RA messages on Ethernet1/0. system-view[Sysname] interface ethernet 1/0[Sysname-Ethernet1/0] ipv6 nd ra prefix 2001:10::100/64 100 10ipv6 nd ra router-lifetimeSyntax ipv6 nd ra router-lifetime valueundo ipv6 nd ra router-lifetimeView Interface viewParameter time: Router lifetime in seconds, in the range of 0 to 9,000. When it is set to 0, thedevice does not serve as the default router.Description Use the ipv6 nd ra router-lifetime command to configure the router lifetime inRA messages.Use the undo ipv6 nd ra router-lifetime command to restore the defaultconfiguration.By default, the router lifetime in RA messages is 1,800 seconds.
