S01.    Copy SRH[0] and D to buffer memory
S02.    Pop the IPv6 header and all its extension headers
S03.    Push a new IPv6 header with a UDP/GTP-U header
S04.    Set the outer IPv6 SA to S
S05.    Set the outer IPv6 DA from buffer memory
S06.    Set the outer Payload Length, Traffic Class, Flow Label,
           Hop Limit, and Next Header fields
S07.    Set the GTP-U TEID (from buffer memory)
S08.    Submit the packet to the egress IPv6 FIB lookup for
           transmission to the new destination