TCP: update ip_local_port_range documentation

The explanation of ip_local_port_range in
Documentation/networking/ip-sysctl.txt contains several factual
errors:

- The default value of ip_local_port_range does not depend on the
  amount of memory available in the system.
- tcp_tw_recycle is not enabled by default.
- 1024-4999 is not the default value.
- Etc.

Clean up the mess.

Signed-off-by: Fernando Luis Vazquez Cao <fernando@oss.ntt.co.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt
index ad3e80e..bd80ba5 100644 (file)
--- a/Documentation/networking/ip-sysctl.txt
+++ b/Documentation/networking/ip-sysctl.txt
@@ -604,15 +604,8 @@ IP Variables:
 ip_local_port_range - 2 INTEGERS
        Defines the local port range that is used by TCP and UDP to
        choose the local port. The first number is the first, the
-       second the last local port number. Default value depends on
-       amount of memory available on the system:
-       > 128Mb 32768-61000
-       < 128Mb 1024-4999 or even less.
-       This number defines number of active connections, which this
-       system can issue simultaneously to systems not supporting
-       TCP extensions (timestamps). With tcp_tw_recycle enabled
-       (i.e. by default) range 1024-4999 is enough to issue up to
-       2000 connections per second to systems supporting timestamps.
+       second the last local port number. The default values are
+       32768 and 61000 respectively.
 
 ip_local_reserved_ports - list of comma separated ranges
        Specify the ports which are reserved for known third-party