[PATCH iproute2-next] man: ip-route: document tcp_usec_ts route feature
From: Prijesh Patel <hidden>
Date: 2026-09-11 13:59:48
Subsystem:
the rest · Maintainer:
Linus Torvalds
ip route supports a "tcp_usec_ts" per-route feature (RTAX_FEATURE_TCP_USEC_TS) to request microsecond-resolution TCP timestamps for connections to/from a given destination, but this was never added to the ip-route(8) man page or its FEATURES synopsis. Document tcp_usec_ts alongside the existing ecn feature. Signed-off-by: Prijesh Patel <redacted> --- man/man8/ip-route.8.in | 20 +++++++++++++++----- 1 file changed, 15 insertions(+), 5 deletions(-)
diff --git a/man/man8/ip-route.8.in b/man/man8/ip-route.8.in
index fd04432f..ed901fb9 100644
--- a/man/man8/ip-route.8.in
+++ b/man/man8/ip-route.8.in@@ -186,7 +186,7 @@ throw " | " unreachable " | " prohibit " | " blackhole " | " nat " ]" .ti -8 .IR FEATURES " := [ " -.BR ecn " | ]" +.BR ecn " | " tcp_usec_ts " ]" .ti -8 .IR PREF " := [ "
@@ -569,16 +569,26 @@ Actual window size is this value multiplied by the MSS of the connection. The default value is zero, meaning to use Slow Start value. .TP -.BI features " FEATURES " (Linux 3.18+ only) -Enable or disable per-route features. Only available feature at this -time is +.BI features " FEATURES " +Enable or disable per-route features. Available features are .B ecn -to enable explicit congestion notification when initiating connections to the +and +.B tcp_usec_ts. +.in +8 +.B ecn +.RI ( "Linux 3.18+ only" ) +Enables explicit congestion notification when initiating connections to the given destination network. When responding to a connection request from the given network, ecn will also be used even if the .B net.ipv4.tcp_ecn sysctl is set to 0. +.sp +.B tcp_usec_ts +.RI ( "Linux 6.7+ only" ) +Enables microsecond-resolution TCP timestamps for connections to/from the +given destination network, instead of the default millisecond resolution. +.in -8 .TP .BI quickack " BOOL " "(Linux 3.11+ only)"
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2.52.0