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diff --git a/examples/QOS/Diffserv/README b/examples/QOS/Diffserv/README deleted file mode 100644 index 285d514ad12..00000000000 --- a/examples/QOS/Diffserv/README +++ /dev/null @@ -1,107 +0,0 @@ -This directory contains an example which -tests the setting of the Diffserv Codepoint (DSCP) -values in the -IP TOS field of a stream of UDP packets. - -Running the example -=================== - -(1) On one host, run: - server [UDP port number] - - If port number is omitted, a default port number of 20002 - is used. - -(2) On a second host, run: - diffserv_test [destination host] [destination port] - - The host and port of where the server is running should - be specified. - - A stream of UDP packets will be sent from to the server, - with various codepoints set. - -(3) Look at the Diffserv Field (formerly known as the TOS field) - of your packets, using a protocol analyzer, such as Ethereal. - - - - -Introduction -============ -In RFC 2474, the Type of Service (TOS) field in -the IP header was renamed the Diffserv (DS) field. -The DS field is one octet (8 bits). - - 0 1 2 3 4 5 6 7 - +---+---+---+---+---+---+---+---+ - | DSCP | ECN | - +---+---+---+---+---+---+---+---+ - -The first 6 bits of the field are -reserved for the Diffserv Codepoint (DSCP). -There are 64 possible values (0-63) for the DSCP. - -Bits 6 and 7 of the DS field are reserved -for Explicit Congestion Notification (ECN). -ECN is defined in RFC 3168. - - -Per-Hop Behaviors (PHB) -======================= - -A Per-Hop Behavior (PHB) is a description of the externally -observable forwarding treatment applied at a differentiated -services compliant node. - -Certain PHB's are defined in RFC's and associated with -different DSCP values. Other values are undefined and left -for experimentation. Please refer to the RFC's for a full -explanation of the attributes of the various PHB's. - - -DSCP value PHB RFC -(binary) ------------------------------------------------------------ -000000 Default (Best Effort) 2474 -001000 Class Selector (CS1) 2474 -010000 Class Selector (CS2) 2474 -011000 Class Selector (CS3) 2474 -100000 Class Selector (CS4) 2474 -101000 Class Selector (CS5) 2474 -110000 Class Selector (CS6) 2474 -111000 Class Selector (CS7) 2474 -001010 Assured Forwarding (AF11) 2597 -001100 Assured Forwarding (AF12) 2597 -001110 Assured Forwarding (AF13) 2597 -010010 Assured Forwarding (AF21) 2597 -010100 Assured Forwarding (AF22) 2597 -010110 Assured Forwarding (AF23) 2597 -011010 Assured Forwarding (AF31) 2597 -011100 Assured Forwarding (AF32) 2597 -011110 Assured Forwarding (AF33) 2597 -100010 Assured Forwarding (AF41) 2597 -100100 Assured Forwarding (AF42) 2597 -100110 Assured Forwarding (AF43) 2597 -101110 Expedited Forwarding (EF) 2598 - - -References -========== -RFC 2474, "Definition of the Differentiated Services (DS Field) - in the IPv4 and IPv6 Headers", http://www.ietf.org/rfc/rfc2474.txt - -RFC 2475, "An Architecture for Differentiated Services", - http://www.ietf.org/rfc/rfc2475.txt - -RFC 2597, "Assured Forwarding PHB Group", http://www.ietf.org/rfc/rfc2597.txt - -RFC 3246, "An Expedited Forwarding PHB", http://www.ietf.org/rfc/rfc3246.txt - -RFC 3247, "Supplemental Information for the New Definition of the EF PHB", - http://www.ietf.org/rfc/rfc3247.txt - -RFC 3168, "The Addition of Explicit Congestion Notification (ECN) - to IP", http://www.ietf.org/rfc/rfc3168.txt - -Ethereal, http://www.ethereal.com |