13.8 ToS, Introduction to DiffServ | ZyXEL Communications 2000W

Prestige 2000W_V2 User’s Guide

13.8 ToS

The second byte in an IPv4 packet is the Type of Service (ToS) byte. The first three bits (by themselves) of the ToS byte are referred to as the IP Precedence bits and refer to a priority from 0 to 7. The next three bits are used in conjunction with the IP Precedence bits to define the Diffserv Code Point protocol (DSCP bits). The last two bits are reserved for future use.

13.9 Introduction to DiffServ

Quality of Service (QOS) mechanisms provides the best service on a per-flow guarantee. To fine-tune the levels of services on the priority of the traffic flow using QoS places a heavy burden on the network infrastructure.

DiffServ is a class of service (CoS) model that marks packets so that they receive specific per- hope treatment at DiffServ-compliant network devices along the route based on the application types and traffic flow. Packets are marked with DiffServ Code Points (DSCPs) indicating the level of service desired. This allows the intermediary DiffServ-compliant network devices to handle the packets differently depending on the code points without the need to negotiate paths or remember state information for every flow. In addition, applications do not have to request a particular service or give advanced notice of where the traffic is going.

Note: It is strongly recommended for better network performance that the settings are left as per their defaults.

Figure 36 TOS/DIFFSERV

Table 22 TOS/DIFFSERV

LABEL	DESCRIPTION

ToS/DiffServ (00~FF)	Type the HEX code that represents the best method for data
	transmission.
APPLY	Click APPLY to save your changes without restarting the Prestige. Your
	wireless LAN, Internet and SIP settings changes do not take affect until
	you use RESTART (in the navigation panel).
CANCEL	Click CANCEL to begin configuring this screen afresh.

102	Chapter 13 Administrator Web Configurator Screens

Image 102

ZyXEL Communications 2000W manual 13.8 ToS, Introduction to DiffServ, Administrator Web Configurator Screens

Contents

Prestige 2000WV2 Page Trademarks CopyrightDisclaimer Prestige 2000WV2 User’s Guide Federal Communications Commission FCC Interference Statement Certifications Safety Warnings Safety Warnings ZyXEL Limited Warranty ZyXEL Limited Warranty Customer Support Customer Support United Kingdom Table of Contents Chapter Network Settings Chapter Information Menus Appendix a Product Specifications 107 Appendix B Appendix C Prestige 2000WV2 User’s Guide Table of Contents List of Figures List of Figures Peer-to-Peer Communication in an Ad-hoc Network 119 List of Tables List of Tables Eight Subnets Related Documentation PrefaceAbout Your Prestige Syntax Conventions User Guide Feedback Graphics Icons Key Features Getting To Know Your Prestige Applications Place a Call via SIP Proxy Server SIP Call Server Ad-Hoc Wireless Intercom Direct IP to IP Calling Getting to Know the Prestige Hardware Prestige Hardware Descriptions Prestige 2000WV2 User’s Guide Prestige 2000WV2 User’s Guide Getting To Know Your Prestige Using the LCD Screen Menus Using the LCD Screen MenusLCD Main Screen Navigating the LCD Screen Menus Text InputPrestige 2000WV2 User’s Guide LCD Main Screen Press the OK key when you are done Prestige 2000WV2 User’s Guide Using the LCD Screen Menus Site Survey Wireless LAN Setup MenusWireless LAN Setup Menus Select Site Survey Ssid Network ModeSelect Wireless in the first menu screen use the up or down Arrow to highlight it and then press the Left key Select Network Mode Channel Rate WEP Encryption Authentication Type Select Key Select WEP for encryption, not for authentication Profiles Create Prestige 2000WV2 User’s Guide Wireless LAN Setup Menus Fixed IP Network SettingsNetwork Settings Select IP Address Dhcp Select Subnet Mask PPPoE Select PPPoE Name Select PPPoE Pwd Registrar Server SIP SettingsSIP Settings Select Registrar Select Registrar IP Outbound Proxy Server Select Expiry TimeSelect Outbound Proxy Proxy Server Select Proxy Server User Account Select User Account Select Phone Number Select User Pwd Prestige 2000WV2 User’s Guide SIP Settings Adding a Phonebook Entry PhonebookCalling Methods Phonebook Editing Phonebook Entries Select Add Entry Erasing Phonebook Entries Speed Dial Phonebook Entries Select Speed Dial Call History Missed CallsCall History Received Calls Dialed Calls Erasing Calls Select Erase Calls Miscellaneous Settings Setting the Ring MelodyMiscellaneous Settings Setting the Vibration Mode Adjusting the Ring VolumeSelect Ringer Volume Select Edit Time Setting the TimeSetting the Date Select Edit Date Select Settings in the first menu screen Setting the BannerSetting the Key Lock Press the Left key to save your setting Setting the Don’t Disturb Select Don’t Disturb Prestige 2000WV2 User’s Guide Miscellaneous Settings Select MAC Address Information MenusDisplaying Information Information Menus 11Select Firmware Ver Prestige Usage Using the Phonebook to Dial a Telephone NumberUsing Speed Dial to Dial a Telephone Number Dialing a Telephone Number Changing the Volume Answering a CallRejecting a Call Login Using the Web Configurator ScreensIntroduction to the Web Configurator Using the Web Configurator Screens Navigating the Prestige Web Configurator Login Screen NAT Trvsl Web Configurator User Screens SummarySIP Phone Book Web Configurator Administrator Screens Summary PhoneTOS/DS Device Information User Web Configurator ScreensUser Web Configurator Screens IP Address Assignment IP Address and Subnet Mask MAC Address Network Configuration Static DNS Server Network Configuration Dhcp CancelApply Dhcp Network Configuration PPPoE PPPoE Network Configuration SIP Identities VoIP Introduction12.9.1 SIP PPPoE SIP Call Progression SIP Call ProgressionSIP Client Server Invite SIP Proxy Server SIP Configuration 12.9.1.4 RTP 12.11 NAT SIP Proxy NAT Example NAT Types Full Cone NAT Full Cone Restricted Cone Port Restricted Symmetric Restricted Cone NAT Full Cone NAT Example Port Restricted Cone NAT Symmetric NAT NAT and SIP SIP ALGFake WAN Address on SIP and RTP NAT Traversal Configuration StunOutbound Proxy NAT Traversal Configuration ALG Calling Methods Phone Book ConfigurationPhone Book Stun Phonebook Delete WEP Encryption Wireless IntroductionWireless Settings Prestige 2000WV2 User’s Guide Phonebook Ssid WEP 12.19 S/W Update SystemSubmit W Update Zip files before you can upload them Administrator Web Configurator Screens Administrator Web Configurator Screens SIP Proxy Configuration Type the SIP proxy server settings SIP Configuration SIP URI Prestige 2000WV2 User’s Guide IP Configuration Voice Coding13.3.1 G.711 Pstn Call Setup Signaling Phone Setting13.3.2 G.729 100 Administrator Web Configurator Screens Quality of Service Administrator Web Configurator Screens 101 102 Administrator Web Configurator Screens 13.8 ToSIntroduction to DiffServ Troubleshooting Problems Starting Up the PrestigeProblems Using the Keypad Problems Accessing the Prestige Troubleshooting Accessing the Prestige104 Troubleshooting Error Message Troubleshooting Error Message TroubleshootingRestoring the Factory Default Settings Troubleshooting 105 Prestige 2000WV2 User’s Guide 106 Troubleshooting Appendix a Product Specifications 107 Specification TablesHardware Specifications MIC HTTP, TFTP, TCP, UDP, DNS, ARP, Icmp Prestige 2000WV2 User’s Guide Firmware Features108 Appendix a Product Specifications Essid Classes of IP Addresses IP AddressingIP Classes Appendix B IP Subnetting 109 Allowed IP Address Range By Class Subnet MasksSubnetting Natural Masks Two Subnets Example Example Two SubnetsAlternative Subnet Mask Notation Appendix B IP Subnetting 111 Subnet 112 Appendix B IP Subnetting Example Four Subnets Appendix B IP Subnetting 113 Class C Subnet Planning Example Eight SubnetsEight Subnets 114 Appendix B IP Subnetting Subnetting With Class a and Class B Networks Class B Subnet PlanningAppendix B IP Subnetting 115 Prestige 2000WV2 User’s Guide 116 Appendix B IP Subnetting Traditional Dial-up Scenario PPPoE in ActionBenefits of PPPoE Appendix C PPPoE 117 How PPPoE Works Prestige as a PPPoE Client Wireless LAN Topologies Ad-hoc Wireless LAN ConfigurationAppendix D Wireless LANs 119 Basic Service Set 120 Appendix D Wireless LANs Appendix D Wireless LANs 121 Infrastructure Wlan Prestige 2000WV2 User’s Guide 122 Appendix D Wireless LANs Index 123 IndexNumerics Dtmf 124 Index 711 22, 98 729 22, 99 Index 125 126 Index SIP ALG Index 127 Wlan