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ipv6: Update ip-sysctl.txt documentation for recent changes to accept_ra and forwarding

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Documentation for recent changes to the tunables accept_ra and
forwarding.

Signed-off-by: Thomas Graf <tgraf@infradead.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Thomas Graf 2010-09-03 05:47:30 +00:00 committed by David S. Miller
parent c3bccac2fa
commit ae8abfa00e
1 changed files with 22 additions and 5 deletions
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27
Documentation/networking/ip-sysctl.txt
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@ -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.