66 n Handbook of IPv4 to IPv6 Transition
5.4.1 Extension Header Order
When more than one extension header is used in the same packet, it is recom-
mended that those headers appear in the following order:
IPv6 header
Hop-by-Hop Options header
Destination Options header (Note 1)
Routing header
Fragment header
Authentication header (Note 2)
Encapsulating Security Payload header (Note 2)
Destination Options header (Note 3)
Upper-layer header
Note 1: For options to be processed by the first destination that appears in the
IPv6 destination address field plus subsequent destinations listed in the routing
header.
Note 2: Additional recommendations regarding the relative order of the Authenti-
cation and Encapsulating Security Payload headers are given in [RFC2406 ...