HP-UX IPQoS A.01.00 Administrator's Guide (October 2005)

Introduction
HP-UX IPQoS Features
Chapter 1 25
HP-UX IPQoS Features
HP-UX IPQoS A.01.00 provides the following features:
• Conforms to the IETF DiffServ model
HP-UX IPQoS brings an HP-UX host into conformance to the IETF DiffServ model.
HP-UX IPQoS cooperates with QoS policies and policy management as configured in edge
and core routers, and which can also be configured in the switching infrastructure.
— Provides differentiated classes of service on outbound traffic by performing traffic
conditioning actions. Important traffic classes can take bandwidth away from less
important classes, up to user-specified limits.
❏ Classification occurs when traffic classes are defined in filters.
❏ Marking occurs when marking attributes are set in policies.
❏ Metering occurs when bandwidth is reserved for defined traffic classes in policies.
— Allows DSCP and VLAN marking on outbound traffic from the HP-UX server.
❏ Can assign different DSCP network routing priorities (valid range 0-63).
❏ Can assigned different VLAN priorities (valid range 0-7).
IMPORTANT Conformance of HP-UX IPQoS to the IETF DiffServ model applies only to
outbound traffic on an HP-UX host.
• Supports traffic classification on broad range of packet attributes
HP-UX IPQoS supports traffic classification with any combination of the following packet
attributes: IP source or destination address or address ranges (numerically or by host
name); transport port numbers or range (numerically or by service name; can specify
source, destination, or both); transport protocol number (only tcp or udp are currently
supported); network protocol number (Ethertype); DSCP value; and destination physical
(MAC) address.
• Provides provisioned QoS management
With provisioned QoS, network resources are statically configured in anticipation of
traffic that will flow through them. Most QoS mechanisms in network devices and
computing systems use provisioned QoS; for example, priority queues, rate controls, and
packet marking. With signaled QoS, applications or the operating system dynamically
signal network devices in an attempt to reserve resources on them.