From: Thomas Graf <tgraf@infradead.org>
To: netdev@vger.kernel.org
Cc: shemminger@vyatta.com, davem@vger.kernel.org, yoshfuji@linux-ipv6.org
Subject: [PATCH] ipv6: Update ip-sysctl.txt documentation for recent changes to accept_ra and forwarding
Date: Fri, 3 Sep 2010 11:47:30 -0400 [thread overview]
Message-ID: <20100903154729.GA27681@bombadil.infradead.org> (raw)
Documentation for recent changes to the tunables accept_ra and
forwarding.
Signed-off-by: Thomas Graf <tgraf@infradead.org>
Index: net-2.6/Documentation/networking/ip-sysctl.txt
===================================================================
--- net-2.6.orig/Documentation/networking/ip-sysctl.txt
+++ net-2.6/Documentation/networking/ip-sysctl.txt
@@ -1014,6 +1014,12 @@ conf/interface/*:
accept_ra - BOOLEAN
Accept Router Advertisements; autoconfigure using them.
+ Possible values are:
+ 0 Do not accept Router Advertisements.
+ 1 Accept Router Advertisements if forwarding is disabled.
+ 2 Overrule forwarding behaviour. Accept Router Advertisements
+ even if forwarding is enabled.
+
Functional default: enabled if local forwarding is disabled.
disabled if local forwarding is enabled.
@@ -1075,7 +1081,12 @@ forwarding - BOOLEAN
Note: It is recommended to have the same setting on all
interfaces; mixed router/host scenarios are rather uncommon.
- FALSE:
+ Possible values are:
+ 0 Forwarding disabled
+ 1 Forwarding enabled
+ 2 Forwarding enabled (Hybrid Mode)
+
+ FALSE (0):
By default, Host behaviour is assumed. This means:
@@ -1085,18 +1096,24 @@ forwarding - BOOLEAN
Advertisements (and do autoconfiguration).
4. If accept_redirects is TRUE (default), accept Redirects.
- TRUE:
+ TRUE (1):
If local forwarding is enabled, Router behaviour is assumed.
This means exactly the reverse from the above:
1. IsRouter flag is set in Neighbour Advertisements.
2. Router Solicitations are not sent.
- 3. Router Advertisements are ignored.
+ 3. Router Advertisements are ignored unless accept_ra is 2.
4. Redirects are ignored.
- Default: FALSE if global forwarding is disabled (default),
- otherwise TRUE.
+ TRUE (2):
+
+ Hybrid mode. Same behaviour as TRUE, except for:
+
+ 2. Router Solicitations are being sent when necessary.
+
+ Default: 0 (disabled) if global forwarding is disabled (default),
+ otherwise 1 (enabled).
hop_limit - INTEGER
Default Hop Limit to set.
next reply other threads:[~2010-09-03 15:47 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-03 15:47 Thomas Graf [this message]
2010-09-03 16:43 ` [PATCH] ipv6: Update ip-sysctl.txt documentation for recent changes to accept_ra and forwarding David Miller
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