HP UX IPQos Software Filter Overlap, Table, Chapter, Attributes, Object Type, Filter Objects, Filter Objects, Attributes Associated with Filter Objects

Using the HP-UX IPQoS API

Filter Objects

Filter objects define classes of traffic based on a combination of one or more attributes. IP traffic that matches the class of traffic defined by a filter gets processed by the policy that the filter is attached to. A filter can only be attached to multiple policies, but can only be attached to one policy per adapter. A filter is effectively ignored if it is not attached to any policy.

Filter-related functions in the HP-UX IPQoS API allow programmers to create filters, assign (“set”) and access (“get”) values of their attributes, and associate filters with policies.

Table 2-1lists the attributes associated with filter objects.

Table 2-1	Attributes Associated with Filter Objects

Object Type		Attributes

Filter		unique name
		source addresses
		destination addresses
		source port numbers
		destination port numbers
		network protocol number (0x800 or 0x86DD)
		transport protocol number (tcp or udp)
		destination physical address
		DSCP(s)
		priority
		status

Filter Overlap

A filter is said to overlap another filter if:

—both filters are associated with the same adapter

—the priority attribute of the filter is of equal or greater priority than the other

—the filter defines a set of traffic that is a superset of the traffic defined by the other filter (complete overlap), or has an intersection with the traffic defined by the other filter (partial overlap)

Chapter 2