diff options
Diffstat (limited to 'Documentation/networking/ip-sysctl.txt')
| -rw-r--r-- | Documentation/networking/ip-sysctl.txt | 36 |
1 files changed, 31 insertions, 5 deletions
diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt index f350c69b2bb..fe95105992c 100644 --- a/Documentation/networking/ip-sysctl.txt +++ b/Documentation/networking/ip-sysctl.txt @@ -20,6 +20,15 @@ ip_no_pmtu_disc - BOOLEAN min_pmtu - INTEGER default 562 - minimum discovered Path MTU +route/max_size - INTEGER + Maximum number of routes allowed in the kernel. Increase + this when using large numbers of interfaces and/or routes. + +neigh/default/gc_thresh3 - INTEGER + Maximum number of neighbor entries allowed. Increase this + when using large numbers of interfaces and when communicating + with large numbers of directly-connected peers. + mtu_expires - INTEGER Time, in seconds, that cached PMTU information is kept. @@ -1014,6 +1023,12 @@ 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 +1090,12 @@ 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 +1105,24 @@ 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. |