This patch separates setting of hardware interfaec and software
interface MTU. Software MTU is L2 payload MTU (i.e. not including L2
header). Per-protocol MTU for IPv4, IPv6 and MPLS can also be set.
Currently only IP4, IP6 are enabled in adjacency / rewrite code.
Documentation in src/vnet/MTU.md
Change-Id: Iee2fd6f0bbc8210748dd8e073ab9fab87d323690
Signed-off-by: Ole Troan <ot@cisco.com>
Fix GRE/IPv6 setting of ip->payload_length (which has never worked).
Change-Id: Ie68f1cc7bbb70489d6ec97356132c783f2345e1e
Signed-off-by: Ole Troan <ot@cisco.com>