Configuring Quality Of Service - HP 7102dl - ProCurve Secure Router Configuration Manual

Using the Web Browser Interface for Advanced Configuration Tasks

Configuring Quality of Service

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Configuring Quality of Service
Your ProCurve Secure Router may route several types of traffic:
data, which can tolerate high latency and bursts, as well as be fragmented
and reconstructed
real-time traffic, such as Voice of IP (VoIP), and interactive traffic, such
as Telnet, which require low latency and low jitter
high priority traffic, which needs a certain amount of bandwidth and
protection from being dropped
control plane traffic, which the router always serves no matter what
queuing method the interface implements.
Quality of service (QoS) protocols allow routers to grant the appropriate type
of service to various types of traffic.
The ProCurve Secure Router supports these QoS methods:
Weighted Fair Queuing (WFQ)—By default, the ProCurve Secure Router
implements WFQ on interfaces with speeds of E1 or less. WFQ automat-
ically divides traffic into conversation flows according to its source and
destination and allocates bandwidth to these flows according to relative
IP precedence.
Class Based Weighted Fair Queuing (CBWFQ)—With CBWFQ, you can
manually define the classes and relative bandwidth for WFQ. On the
ProCurve Secure Router, you can define up to four classes per interface
and 16 total on the router. You can guarantee these classes up to 75% of
an interface's bandwidth.
Low Latency Queuing (LLQ)—Traffic placed in a low latency queue is
always served first with a guaranteed amount of bandwidth. LLQ is usually
the best solution for voice and other realtime traffic. An interface can
implement both LLQ and CBWFQ or WFQ.
Packet marking—You may be able to negotiate better service from your
service provider for packets marked with a specific ToS value in their IP
headers. For example, the provider's network could drop packets with a
high priority value last. You can configure the ProCurve Secure Router to
mark packets with the agreed-upon IP precedence or DiffServ value
before forwarding them into the network.
Packets that the router marks with a higher IP precedence or DiffServ
value also receive relatively more bandwidth with WFQ.