On Wed, 19 Jul 2017 23:19:33 -0600 "Philip Prindeville" <phil...@redfish-solutions.com> wrote:
> From: Philip Prindeville <phil...@redfish-solutions.com> > > In the presence of firewalls which improperly block ICMP Unreachable > (including Fragmentation Required) messages, Path MTU Discovery is > prevented from working. > > The workaround is to handle IPv4 payloads opaquely, ignoring the DF bit. > > Reviewed-by: Stephen Hemminger <step...@networkplumber.org> > Signed-off-by: Philip Prindeville <phil...@redfish-solutions.com> > --- > doc/ip-cref.tex | 7 +++++++ > ip/link_gre.c | 16 ++++++++++++++++ > man/man8/ip-tunnel.8 | 9 +++++++++ > 3 files changed, 32 insertions(+) > Please fix Subject line and the following minor checkpatch warnings and resubmit WARNING: line over 80 characters #109: FILE: ip/link_gre.c:170: + ignore_df = !!rta_getattr_u8(greinfo[IFLA_GRE_IGNORE_DF]); WARNING: Block comments use a trailing */ on a separate line #121: FILE: ip/link_gre.c:322: + // only the lsb is significant, use 2 for presence */ total: 0 errors, 2 warnings, 86 lines checked
