If two hosts have both mutually accessible ULA and GUA addresses, they will prefer _GUAs_ to talk to each other. So the connection will be susceptible to the pr

If two hosts have both mutually accessible ULA and GUA addresses, they will prefer _GUAs_ to talk to each other. So the connection will be susceptible to the prefix withdrawal if the upstream goes down (BTW, IPv6 did nothing sane for multihoming either). > Are you taking about mDNS still referencing the withdrawn prefix? That too.