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-rw-r--r--docs/netctl.profile.5.txt3
1 files changed, 3 insertions, 0 deletions
diff --git a/docs/netctl.profile.5.txt b/docs/netctl.profile.5.txt
index 82946da..212bbb7 100644
--- a/docs/netctl.profile.5.txt
+++ b/docs/netctl.profile.5.txt
@@ -461,6 +461,9 @@ the *ip options*, the following are understood for connections of the
'Remote='::
The address of the remote end of the tunnel.
+'Key=' [requires 'Mode=gre']::
+ A key identifying an individual traffic flow within a tunnel.
+
OPTIONS FOR `tuntap' CONNECTIONS
--------------------------------