Sorry. I was presuming we were talking about about UDP fragmentation with IPv4, as this was the bug report and of course GCE doesn&#x27;t support IPv6.<p>IPv6 jumbograms are a whole different kettle of fish, as they are really handled at the IP layer, and are supposed to only be for cases where you have an MTU &gt; 65,575 bytes. As that link describes, the UDP protocol itself doesn&#x27;t do any fragmentation or reassembly of those packets. RFC 2147 is really just an update to handle the fact that IPv6 can have a single packet that is larger than an IPv4 packet.