Administration HiPath 3000/5000 V7 IP systems

3000sb4.fm
For internal use only HiPath 3000/5000 in the LAN Network
QoS - Quality of Service
4.2 QoS - Quality of Service
Subject Cross Reference
Goals of QoS Section 4.2.1 on
page 4-7
QoS in the Router? Section 4.2.2 on
page 4-7
4.2.1 Goals of QoS
Problems: ● IP does not guarantee any bandwidths
● QoS is not part of H.323
Consequences ● Time problems due to large E-mail attachments and web surfing
● Network congestion due to multiple requests for the same web page
● Reduced voice quality due to
– Delay
– Jitter
– Packet loss
Goals: ● QoS is required in the WAN/LAN for
– Optimum voice quality for every connection
– Fewer interruptions
4.2.2 QoS in the Router?
● QoS functions control router priorities and timing.
● Router queues are optimized for routing and are not suitable for QoS monitoring of voice
transmission
● Fragmentation (if used) takes time and thereby increases the risk of packet loss
● Time-controlled hierarchical policies not available
● No feedback due to insufficient monitoring
● Architecture not suitable for specialized VoIP control functions
P31003-H3570-Y100-4-7618, 2007-10-31
HiPath 3000/5000 V7, System Description 4-7