HP ProCurve Secure Router 7203 dl Advanced Management And Configuration Manual page 754

IP Routing—Configuring RIP, OSPF, BGP, and PBR
Configuring Policy-Based Routing
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13-140
The AF PHB divide traffic into four classes, each of which is granted progres-
sively more relative bandwidth. Each class is divided into three subclass, the
first of which is granted to highest drop priority: routers will drop packets in
the first subclass last if the network becomes congested.
If the remote network supports AF PHB, you can mark selected packets with
the DSCP for an AF subclass. Enter this command:
Syntax: set ip dscp [af11 | af12 | af13 | af 21 | af 22 | af23 | af31 | af 32 | af 33 | af 41 |
af42 | af43]
You can also set a CS PHB. CS PHBs provide backwards compatibility with IP
precedence. Enter this command:
Syntax: match ip dscp [cs1 | cs2 | cs3 | cs4 | cs5 | cs6 | cs7]
If you want to remove ToS values from selected packets, you can enter this
command:
Syntax: match ip dscp default
The EF PHB requests low latency for traffic, as well as a guaranteed amount
of bandwidth (set by the administrator of the network into which packets are
being forwarded). Enter this command to request EF for selected packets:
Syntax: match ip dscp ef
You can also enter a value between 0 and 63 to mark traffic with a DSCP
defined in the forwarding network. See Chapter 7: Setting Up Quality of
Service for more information about the type of service generally given to
packets with various DiffServ values.
The value you set in the route map tags packets for QoS in the remote network,
not on the local router. In order to implement QoS functions, such as low-
latency queuing (LLQ) or class-based weighted fair queuing (CBWFQ), on the
ProCurve Secure Router, you must create QoS maps. (A QoS map can also
mark packets with an IP precedence or DiffServ value.) Configuring QoS maps
is described in Chapter 7: Setting Up Quality of Service.
Note also that the remote network must support the type of service requested
by the value that you set in the route map.