SROS Command Line Interface Reference Guide
Route Map Command Set
5991-2114
© Copyright 2007 Hewlett-Packard Development Company, L.P.
1280
match ip dscp [
<value>
| af
xx
| cs
xx
| default | ef]
Use the
match ip dscp
command to configure the route map to route traffic based on the Differentiated
Services Code Point (DSCP) value in the IP header of the packet. Use the
no
form of this command to
discontinue matching.
Syntax Description
<value>
Specifies the DSCP numeric value to match. (Valid range: 0 to 63.)
af
xx
Specifies the assured forwarding (AF) value to match. (Select from: 11,
12, 13, 21, 22, 23, 31, 32, 33, 41, 42, or 43.)
cs
xx
Specifies the class selector (CS) value to match. (Valid range: 1 to 7.)
default
Specifies matching the default IP DSCP value.
ef
Specifies matching those packets marked for expedited forwarding
(EF).
Default Values
No default value necessary for this command.
Functional Notes
The Differentiated Services (DiffServ or DS) model was created in RFC2474 and 2475 to build on the
original Type of Service field by creating a six-bit sequence (combining the precedence value with the
delay, throughput, and reliability bits). This six-bit sequence increased the number of available values from
8 to 64. The DiffServ model introduced a new concept to QoS in the IP network environment: per-hop
behaviors (PHBs). The PHB premise is that pieces equipment using the DiffServ model have an agreed
upon set of rules (PHB types) for handling certain network traffic. Though the RFC explicitly defines what
each PHB should be capable of, it does not restrict vendor-specific implementation of the PHBs. Each
vendor is free to decide how their network product implements the various defined PHBs.
According to RFC2474, the DS field contains the following bits:
Equipment following the DiffServ model (DS-compliant nodes) must use the entire six-bit DSCP value to
determine the appropriate PHB. The PHBs are defined as the following:
•
Default PHB
•
Class Selector PHB
•
Assured Forwarding PHB (RFC2597)
•
Expedited Forwarding PHB (RFC2598)
0
1
2
3
4
5
6
7
Unused*
Differentiated Service Code Point
* The previously unused bits in the DS field are now used for congestion control and are not discussed in this document.
Содержание ProCurve Secure 7102dl
Страница 2: ......
Страница 3: ...SROS Command Line Interface Reference Guide Software Version J 08 03 September 2007 61195880L1 35H ...
Страница 1454: ......