Specifications

3000sb4.fm
P31003-H3560-X100-1-7618, 09/05
HiPath 3000/5000 V6.0, System Description
4-9
For internal use only
HiPath 3000/5000 in the LAN Network
QoS - Quality of Service
4.2 QoS - Quality of Service
4.2.1 Goals of QoS
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
Subject Cross Reference
Goals of QoS Section 4.2.1 on
page 4-9
QoS in the Router? Section 4.2.2 on
page 4-9
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