Fragment extension headers are supported. First fragments have a fragment extension header (byte 21 = 0x2C) followed by a UDP header (byte 55 = 0x11). Middle and last fragments have a fragment extension header followed by data only (no UDP header). The first packet fragment has MF=1 with a zero offset. Middle fragments have MF=1 with a nonzero offset. The last packet fragment has MF=0 with a nonzero offset. Non-fragmented packets do not have a fragment extension header. A count is output for packet fragments but no errors are reported.
Received packet UDP checksum of zero means that there is no IPV6 checksum sent with the packet so no error will be issued.
Received packet UDP checksum of 0xFFFF means that the checksum was calculated to be 0xFFFF or 0x0000 but was sent in the transmitted packet as 0xFFFF by the sending originating entity.