NEC SL1100 Networking Manual page 7

NEC SL1100
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Chapter 6 Network Design Considerations
Section 1
Section 2
2.1
2.2
2.3
Section 3
Section 4
4.1
4.2
4.3
Section 5
5.1
5.2
Section 6
6.1
6.2
6.3
6.4
6.5
6.6
6.7
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Networking Manual
Introduction ............................................................................ 6-1
QoS.......................................................................................... 6-1
QoS Definitions .................................................................................... 6-1
Voice Quality Improvements ................................................................ 6-3
Types of Classifications for Traffic for QoS ......................................... 6-4
Internet Based Connections (xDSL, Cable, etc.)................. 6-6
Firewalls and NAT .................................................................. 6-7
Understanding the Infrastructure ......................................................... 6-7
Firewall Integration .............................................................................. 6-8
Virtual Private Network (VPN) Tunnelling ............................................ 6-9
CODEC and Bandwidth ....................................................... 6-11
CODECs ............................................................................................ 6-11
Bandwidth .......................................................................................... 6-13
Quality of Service (QoS) Implementation .......................... 6-13
Prioritization ....................................................................................... 6-14
Layer 2 QoS (802.1pq) ...................................................................... 6-16
Layer 3 QoS ....................................................................................... 6-20
IP Precedence ................................................................................... 6-22
Diffserv (Differentiated Service) ......................................................... 6-23
Comparison of IP Precedence and Diffserv Values ........................... 6-24
Programming QoS in the NEC SL1100 System ................................ 6-27
6.7.1 Marking Voice Traffic - Program 84-10-XX .................................... 6-27
6.7.2 NEC SL1100 Voice Protocols ........................................................ 6-27
Issue 6.0
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