HP UX IPQos Software 74

HP-UX IPQoS Configuration Files

Policy Blocks

IMPORTANT Traffic regulation is approximate, not exact. Acceptable tolerance is plus or minus 10% of specified res and max rates.

IMPORTANT Both res bandwidth and max bandwidth specifications apply only to first-hop transmission rates and do not imply any sort of end-to-end bandwidth guarantee.

dscp d

Specifies the DSCP value to be set in all matching packets.

This field is carried in the leftmost 6-bits of the TOS field for IPv4 packets, and in the leftmost 6-bits of the Traffic Class field for IPv6 packets.

Valid values for d can range from 0 to 63 inclusive.

The significance of the value depends on router configuration specifics. DS-aware router configuration includes a mapping between DSCP values and per-hop behaviors (PHBs). HP-UX IPQoS does not use the DSCP values in terms of PHB behavior, its role is solely to set DSCP values.

NOTE	Packets transiting administrative boundaries can have their
	DSCP fields changed by boundary routers. This is usually
	defined in peering agreements between administrations.

DS-aware routing configuration is outside the scope of this guide. For common mapping suggestions and additional information, refer to RFC 2597 Assured Forwarding PHB Group and RFC 2598 An Expedited Forwarding PHB.

vpr priority

Specifies the three-bit priority field of the VLAN tag. HP-UX IPQoS enables you to change the VLAN priority field only, not the VLAN ID field.

Values for priority can range between 0 to 7 inclusive.

VLAN tags are not propagated after the first hop.

Chapter 4