diff options
Diffstat (limited to 'Documentation/networking/ip-sysctl.txt')
| -rw-r--r-- | Documentation/networking/ip-sysctl.txt | 56 |
1 files changed, 50 insertions, 6 deletions
diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt index d46338af600..935e298f674 100644 --- a/Documentation/networking/ip-sysctl.txt +++ b/Documentation/networking/ip-sysctl.txt @@ -102,9 +102,15 @@ inet_peer_gc_maxtime - INTEGER TCP variables: tcp_abc - INTEGER - Controls Appropriate Byte Count defined in RFC3465. If set to - 0 then does congestion avoid once per ack. 1 is conservative - value, and 2 is more agressive. + Controls Appropriate Byte Count (ABC) defined in RFC3465. + ABC is a way of increasing congestion window (cwnd) more slowly + in response to partial acknowledgments. + Possible values are: + 0 increase cwnd once per acknowledgment (no ABC) + 1 increase cwnd once per acknowledgment of full sized segment + 2 allow increase cwnd by two if acknowledgment is + of two segments to compensate for delayed acknowledgments. + Default: 0 (off) tcp_syn_retries - INTEGER Number of times initial SYNs for an active TCP connection attempt @@ -294,15 +300,15 @@ tcp_rmem - vector of 3 INTEGERs: min, default, max Default: 87380*2 bytes. tcp_mem - vector of 3 INTEGERs: min, pressure, max - low: below this number of pages TCP is not bothered about its + min: below this number of pages TCP is not bothered about its memory appetite. pressure: when amount of memory allocated by TCP exceeds this number of pages, TCP moderates its memory consumption and enters memory pressure mode, which is exited when memory consumption falls - under "low". + under "min". - high: number of pages allowed for queueing by all TCP sockets. + max: number of pages allowed for queueing by all TCP sockets. Defaults are calculated at boot time from amount of available memory. @@ -369,6 +375,41 @@ tcp_slow_start_after_idle - BOOLEAN be timed out after an idle period. Default: 1 +CIPSOv4 Variables: + +cipso_cache_enable - BOOLEAN + If set, enable additions to and lookups from the CIPSO label mapping + cache. If unset, additions are ignored and lookups always result in a + miss. However, regardless of the setting the cache is still + invalidated when required when means you can safely toggle this on and + off and the cache will always be "safe". + Default: 1 + +cipso_cache_bucket_size - INTEGER + The CIPSO label cache consists of a fixed size hash table with each + hash bucket containing a number of cache entries. This variable limits + the number of entries in each hash bucket; the larger the value the + more CIPSO label mappings that can be cached. When the number of + entries in a given hash bucket reaches this limit adding new entries + causes the oldest entry in the bucket to be removed to make room. + Default: 10 + +cipso_rbm_optfmt - BOOLEAN + Enable the "Optimized Tag 1 Format" as defined in section 3.4.2.6 of + the CIPSO draft specification (see Documentation/netlabel for details). + This means that when set the CIPSO tag will be padded with empty + categories in order to make the packet data 32-bit aligned. + Default: 0 + +cipso_rbm_structvalid - BOOLEAN + If set, do a very strict check of the CIPSO option when + ip_options_compile() is called. If unset, relax the checks done during + ip_options_compile(). Either way is "safe" as errors are caught else + where in the CIPSO processing code but setting this to 0 (False) should + result in less work (i.e. it should be faster) but could cause problems + with other implementations that require strict checking. + Default: 0 + IP Variables: ip_local_port_range - 2 INTEGERS @@ -724,6 +765,9 @@ conf/all/forwarding - BOOLEAN This referred to as global forwarding. +proxy_ndp - BOOLEAN + Do proxy ndp. + conf/interface/*: Change special settings per interface. |