All fragments of the same IPv4 packet are translated and sent toward the same CE. As the second and consecutive fragments do not contain any port information, the translation is performed based on the <SA, DA, Prot, Ident> cached flow records extracted from the IPv4 header.
Note that the VSR may further fragment an IPv4 fragment that it has received to fit it within the IPv6 MTU.
Figure: Fragmentation in the downstream direction shows downstream fragmentation scenarios.
Figure: Fragmentation in the downstream direction
