1/proc/sys/net/conf/<iface>/seg6_* variables:
 2
 3seg6_enabled - BOOL
 4	Accept or drop SR-enabled IPv6 packets on this interface.
 5
 6	Relevant packets are those with SRH present and DA = local.
 7
 8	0 - disabled (default)
 9	not 0 - enabled
10
11seg6_require_hmac - INTEGER
12	Define HMAC policy for ingress SR-enabled packets on this interface.
13
14	-1 - Ignore HMAC field
15	0 - Accept SR packets without HMAC, validate SR packets with HMAC
16	1 - Drop SR packets without HMAC, validate SR packets with HMAC
17
18	Default is 0.