Telematics Chapter 6: Network Layer - Freie Universität Berlin

IPv6 Extension Headers
● Two extension headers can carry a variable number of type-length-value
(TLV) optins
● Hop-by-Hop
● Destination options
● Options are encoded as:
Option Type Opt Data Len Option Data
● Option Type determines also the action that must be taken if the processing IPv6
node does not recognize the Option Type
● The highest-order two bits specifies the action
- 00: skip over this option and continue processing the header
- 01: discard the packet
- 10: discard the packet and ICMP message to source (unicast and multicast)
- 11: discard the packet and ICMP message to source (only unicast)
Univ.-Prof. Dr.-Ing. Jochen H. Schiller ▪ cst.mi.fu-berlin.de ▪ Telematics ▪ Chapter 6: Network Layer
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