ipv4: add option to drop unicast encapsulated in L2 multicast

[karo-tx-linux.git] / Documentation / networking / ip-sysctl.txt

diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt
index 73b36d7c7b0d67309cce7bf0bd8a46f0c6ee7ea1..d5910d63214d8105838bc988e57222abbfc57122 100644 (file)
--- a/Documentation/networking/ip-sysctl.txt
+++ b/Documentation/networking/ip-sysctl.txt
@@ -1216,6 +1216,13 @@ promote_secondaries - BOOLEAN
        promote a corresponding secondary IP address instead of
        removing all the corresponding secondary IP addresses.
 
+drop_unicast_in_l2_multicast - BOOLEAN
+       Drop any unicast IP packets that are received in link-layer
+       multicast (or broadcast) frames.
+       This behavior (for multicast) is actually a SHOULD in RFC
+       1122, but is disabled by default for compatibility reasons.
+       Default: off (0)
+
 
 tag - INTEGER
        Allows you to write a number, which can be used as required.