BB 00 Skip over this Option and continue processing. C 1 Option Data can change en route to the packet's final destination. TTTTT 10000 Option Type assigned from IANA [IANA-HBH]. Length: 4 The size of the value field in Option Data field supports PMTU values from 0 to 65,534 octets, the maximum size represented by the Path MTU Option. Min-PMTU: n 16-bits. The minimum MTU recorded along the path in octets, reflecting the smallest link MTU that the packet experienced along the path. A value less than the IPv6 minimum link MTU [RFC8200] MUST be ignored. Rtn-PMTU: n 15-bits. The returned Path MTU field, carrying the 15 most significant bits of the latest received Min-PMTU field for the forward path. The value zero means that no Reported MTU is being returned. R n 1-bit. R-Flag. Set by the source to signal that the destination host should include the received Rtn-PMTU field updated by the reported Min-PMTU value when the destination host is to send a PMTU Option back to the source host.