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+.. SPDX-License-Identifier: GPL-2.0
+
+====================
+Seg6 Sysfs variables
+====================
+
+
+/proc/sys/net/conf/<iface>/seg6_* variables:
+============================================
+
+seg6_enabled - BOOL
+ Accept or drop SR-enabled IPv6 packets on this interface.
+
+ Relevant packets are those with SRH present and DA = local.
+
+ * 0 - disabled (default)
+ * not 0 - enabled
+
+seg6_require_hmac - INTEGER
+ Define HMAC policy for ingress SR-enabled packets on this interface.
+
+ * -1 - Ignore HMAC field
+ * 0 - Accept SR packets without HMAC, validate SR packets with HMAC
+ * 1 - Drop SR packets without HMAC, validate SR packets with HMAC
+
+ Default is 0.