Greg > It's not necessary to have a DNAHostLinkIDList and send the old LinkID > prefix > for 1.5 hours. > > Routers advertising the next three RAs rapidly (including both prefixes > in either > a PIO or LPO) after a link ID change would be sufficient. What if an MN is in dormant mode and misses those 3 RAs? Then after waking up, the MN may make a wrong decision. Best Regards JinHyeock