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-rw-r--r--Documentation/networking/mpls-sysctl.txt11
1 files changed, 11 insertions, 0 deletions
diff --git a/Documentation/networking/mpls-sysctl.txt b/Documentation/networking/mpls-sysctl.txt
index 15d8d16934fd..9badd1d6685f 100644
--- a/Documentation/networking/mpls-sysctl.txt
+++ b/Documentation/networking/mpls-sysctl.txt
@@ -19,6 +19,17 @@ platform_labels - INTEGER
Possible values: 0 - 1048575
Default: 0
+ip_ttl_propagate - BOOL
+ Control whether TTL is propagated from the IPv4/IPv6 header to
+ the MPLS header on imposing labels and propagated from the
+ MPLS header to the IPv4/IPv6 header on popping the last label.
+
+ If disabled, the MPLS transport network will appear as a
+ single hop to transit traffic.
+
+ 0 - disabled / RFC 3443 [Short] Pipe Model
+ 1 - enabled / RFC 3443 Uniform Model (default)
+
conf/<interface>/input - BOOL
Control whether packets can be input on this interface.