pppoe拨号ipv6 nat66可以自动获取前缀更换吗？

路由器上接了2条pppoe拨号的，想做成nat66,但不知道如何获取pppoe前缀路由器RT-MSR3620-DP-WiNetweibo.com/ttarticle/p/show?id=2309405157455545106637weibo.com/ttarticle/p/show?id=2309405157455599632454weibo.com/ttarticle/p/show?id=2309405157455654158347weibo.com/ttarticle/p/show?id=2309405157455704490167weibo.com/ttarticle/p/show?id=2309405157455759016058weibo.com/ttarticle/p/show?id=2309405157455813541978weibo.com/ttarticle/p/show?id=2309405157455868068024weibo.com/ttarticle/p/show?id=2309405157455922331754weibo.com/ttarticle/p/show?id=2309405157455977119749weibo.com/ttarticle/p/show?id=2309405157456027189418weibo.com/ttarticle/p/show?id=2309405157456081715347weibo.com/ttarticle/p/show?id=2309405157456136503610weibo.com/ttarticle/p/show?id=2309405157456190767208weibo.com/ttarticle/p/show?id=2309405157456245293171weibo.com/ttarticle/p/show?id=2309405157456300081355weibo.com/ttarticle/p/show?id=2309405157456354607251weibo.com/ttarticle/p/show?id=2309405157456409133157weibo.com/ttarticle/p/show?id=2309405157456463659018weibo.com/ttarticle/p/show?id=2309405157456513990916weibo.com/ttarticle/p/show?id=2309405157456568516853weibo.com/ttarticle/p/show?id=2309405157456623042857weibo.com/ttarticle/p/show?id=2309405157456681500679weibo.com/ttarticle/p/show?id=2309405157456736288895weibo.com/ttarticle/p/show?id=2309405157456790814771weibo.com/ttarticle/p/show?id=2309405157456845340774weibo.com/ttarticle/p/show?id=2309405157456899866735weibo.com/ttarticle/p/show?id=2309405157456954130483weibo.com/ttarticle/p/show?id=2309405157457008918714weibo.com/ttarticle/p/show?id=2309405157457063444760weibo.com/ttarticle/p/show?id=2309405157457122164786weibo.com/ttarticle/p/show?id=2309405157457176690884weibo.com/ttarticle/p/show?id=2309405157457230954647weibo.com/ttarticle/p/show?id=2309405157457285480628weibo.com/ttarticle/p/show?id=2309405157457340268802weibo.com/ttarticle/p/show?id=2309405157457394794810weibo.com/ttarticle/p/show?id=2309405157457453514854weibo.com/ttarticle/p/show?id=2309405157457511972885weibo.com/ttarticle/p/show?id=2309405157457566761103weibo.com/ttarticle/p/show?id=2309405157457621024892weibo.com/ttarticle/p/show?id=2309405157457675813080weibo.com/ttarticle/p/show?id=2309405157457730339166weibo.com/ttarticle/p/show?id=2309405157457784602762weibo.com/ttarticle/p/show?id=2309405157457843585216weibo.com/ttarticle/p/show?id=2309405157457902305288weibo.com/ttarticle/p/show?id=2309405157457956569112weibo.com/ttarticle/p/show?id=2309405157458011357233weibo.com/ttarticle/p/show?id=2309405157458065883214weibo.com/ttarticle/p/show?id=2309405157458120409351weibo.com/ttarticle/p/show?id=2309405157458174673063weibo.com/ttarticle/p/show?id=2309405157458233393201