On 3/10/17 1:43 PM, Robert Shearman wrote: > Provide the ability to control on a per-route basis whether the TTL > value from an MPLS packet is propagated to an IPv4/IPv6 packet when > the last label is popped as per the theoretical model in RFC 3443 > through a new route attribute, RTA_TTL_PROPAGATE which can be 0 to > mean disable propagation and 1 to mean enable propagation. > > In order to provide the ability to change the behaviour for packets > arriving with IPv4/IPv6 Explicit Null labels and to provide an easy > way for a user to change the behaviour for all existing routes without > having to reprogram them, a global knob is provided. This is done > through the addition of a new per-namespace sysctl, > "net.mpls.ip_ttl_propagate", which defaults to enabled. If the > per-route attribute is set (either enabled or disabled) then it > overrides the global configuration. > > Signed-off-by: Robert Shearman <rshea...@brocade.com> > --- > Documentation/networking/mpls-sysctl.txt | 11 ++++ > include/net/netns/mpls.h | 2 + > include/uapi/linux/rtnetlink.h | 1 + > net/mpls/af_mpls.c | 87 > +++++++++++++++++++++++++++++--- > net/mpls/internal.h | 7 +++ > 5 files changed, 100 insertions(+), 8 deletions(-)
Acked-by: David Ahern <d...@cumulusnetworks.com> Tested-by: David Ahern <d...@cumulusnetworks.com>
