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TLV-encoding
(Type-Length-Value)
- Type: identifier of type of option
- Two highest bits of Type: unrecognised option processing:
- 00 – skip over the option and continue
- 01 – discard the packet
- 10 – discard the packet and send ICMPv6
- 11 – discard the packet and send ICMPv6 only if destination isn't IPv6 multicast address
- Third highest-order bit of Type: whether (1) or not (0) Option Data can change en-route to the final destination
- Length: length of the Option Data, in octets
More information is available on the
graphics version.