iptos(SFF)

Description

Each entry should consist of a single line containing the name of the TOS entry, the protocol name for which the entry is appropriate, the Type Of Service value for the entry, and any aliases that exist for the entry. Items are separated by any number of blanks and/or tab characters. A pound sign (#) indicates that the rest of the line is a comment and is not interpreted by routines that search the file. Blank lines in the file are ignored.

TOS entry names may contain any printable character other than a blank, tab, new-line, or comment (#).

A protocol name of a single asterisk () indicates that the entry is valid for all protocols.

The TOS value for the entry should be a list of either symbolic names, or numbers (octal, decimal, or hexadecimal), corresponding to TOS option bits or TOS precedence values, separated by vertical bar (|) characters. Perform an OR operation on the specified option bits or precedence values to yield the actual TOS value. Recognized symbolic names for TOS option bits are as follows:

   none                0x00
   delay               0x10
   throughput          0x08
   reliability         0x04
   reserved1           0x02
   reserved2           0x01

   netcontrol          0xe0
   internetcontrol     0xc0
   crtic/ecp           0xa0
   flashoverride       0x80
   flash               0x60
   immediate           0x40
   priority            0x20
   routine             0x00

Examples

   #
   # Format of this file:
   # Application   Proto  TOS-bits       aliases
   #
   # The Proto field may be "*" to mean it doesn't matter.
   #
   # For multiple values, use a "|", e.g, delay|throughput
   #
   

   delay           *      delay          lowdelay
   reliability     *      reliability    highreliability
   throughput      *      throughput     highthroughput
   

   data            tcp    throughput     bulk-data batch rcp
   data            udp    delay          bulk-data batch tftp
   

   interactive     tcp    delay          rlogin telnet
   interactive     udp    delay
   

   bootp           *      none
   domain          udp    delay          nameserver
   domain          tcp    none           nameserver
   egp             udp    none
   ftp-control     tcp    delay
   ftp-data        tcp    throughput
   icmp-errors     icmp   none
   icmp-queries    icmp   none
   igp             *      reliability    route router routed
   nntp            *      none
   smtp-cmd        tcp    delay
   smtp-data       tcp    throughput
   #smtp           tcp    none           # only if you can't switch !!!
   snmp            udp    reliability
   tftp            udp    delay

Files

/etc/iptos

contains names and TOS values

See also