LookingGlassを見たら、経路が最適化されたようなので、チェック。
> show ipv6 bgp reg _7684_ BGP table version is 0, local router ID is 61.211.224.203 Status codes: s suppressed, d damped, h history, * valid, > best, i - internal, r RIB-failure, S Stale, R Removed Origin codes: i - IGP, e - EGP, ? - incomplete Network Next Hop Metric LocPrf Weight Path *> 2401:2500::/32 2001:e40:100:100::5 900 0 9370 7684 i Total number of prefixes 1