13.8 ToS, Introduction to DiffServ | ZyXEL Communications P2000W

P-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.

104	Chapter 13 Administrator Web Configurator Screens
VoIPon www.voipon.co.uk	sales@voipon.co.uk Tel: +44 (0)1245 808195 Fax: +44 (0)1245 600030

Image 104

ZyXEL Communications P2000W manual 13.8 ToS, Introduction to DiffServ

Contents

2000WV2 Page Copyright DisclaimerTrademarks 2000WV2 User’s Guide Certifications Sales@voipon.co.uk Tel +44 01245 Fax +44 01245 2000WV2 User’s Guide Safety Warnings Safety Warnings ZyXEL Limited Warranty Customer Support Customer Support United Kingdom Page Table of Contents Chapter Network Settings 10.1 Appendix a Appendix C Page List of Figures List of Figures Prestige as a PPPoE Client List of Tables List of Tables Preface About Your PrestigeRelated Documentation Syntax Conventions Graphics Icons Key Preface Features QoS Quality of ServiceGetting To Know Your Prestige Dynamic Jitter Buffer 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 2000WV2 User’s Guide Prestige Hardware Descriptions Page Using the LCD Screen Menus LCD Main Screen Using the LCD Screen Menus Navigating the LCD Screen MenusText Input 2000WV2 User’s Guide LCD Main Screen Press the OK key when you are done Page Wireless LAN Setup Menus Wireless LAN Setup Menus Tel +44 01245 808195 Fax +44 01245Site Survey Select Site Survey Network Mode Select Wireless in the first menu screen use the up or downWireless LAN Setup Menus Ssid Select Network Mode Channel Rate WEP Encryption Authentication Type Select Key Select Profiles Create Page Select IP Address Network SettingsFixed IP Select Subnet Mask Network SettingsDhcp PPPoE Select PPPoE Name Clear the PPPoE password and enter your’s Select PPPoE Pwd Select Registrar Select Registrar IP SIP SettingsRegistrar Server Select Outbound Proxy SIP SettingsOutbound Proxy Server Proxy Server Select Proxy Server User Account Select User Account Select Phone Number Username Page Phonebook Calling MethodsAdding a Phonebook Entry Select Phonebook in the first menu Editing Phonebook Entries Phonebook Erasing Phonebook Entries Speed Dial Phonebook Entries Select Speed Dial Call History Missed Calls Received Calls Call History Dialed Calls Erasing Calls Select Erase Calls Miscellaneous Settings Tel +44 01245 808195 Fax +44 01245 Miscellaneous SettingsSetting the Ring Melody Setting the Vibration Mode Adjusting the Ring VolumeSelect Ringer Volume Miscellaneous Settings Setting the Time Setting the DateSelect Edit Time Select Edit Date Setting the Banner Setting the Key LockSelect Settings in the first menu screen Press the Left key to save your setting Setting the Don’t Disturb Select Don’t DisturbPage Information Menus Displaying Information Select Firmware Ver Information Menus Using the Phonebook to Dial a Telephone Number Using Speed Dial to Dial a Telephone NumberPrestige Usage Dialing a Telephone Number Changing the Volume Answering a CallRejecting a Call Prestige Usage Using the Web Configurator Screens Introduction to the Web ConfiguratorLogin Accounts Navigating the Prestige Web Configurator Using the Web Configurator Screens Web Configurator User Screens Summary Web Configurator Administrator Screens SummaryPage User Web Configurator Screens Device InformationIP Address Assignment Private IP Address Ranges MAC Address User Web Configurator ScreensIP Address and Subnet Mask Network Configuration Static DNS Server Apply Network Configuration DhcpCancel Dhcp Network Configuration PPPoE PPPoE Network Configuration VoIP Introduction 12.9.1 SIPSIP Identities PPPoE SIP Call Progression SIP Client ServerSIP Call Progression Invite SIP Proxy Server SIP Configuration 12.9.1.4 RTP 12.11 NAT SIP Proxy NAT Example NAT Types Full Cone NAT NAT Types Restricted Cone NAT Full Cone NAT Example Port Restricted Cone NAT Symmetric NAT Fake WAN Address on SIP and RTP NAT and SIPSIP ALG Outbound Proxy NAT Traversal ConfigurationStun NAT Traversal Configuration ALG Phonebook Configuration PhonebookCalling Methods Stun Clear DeleteEdit WEP Encryption Wireless IntroductionWireless Settings Ssid WEP Submit 12.19 S/W UpdateSystem W Update Zip files before you can upload them Administrator Web Configurator Screens SIP Proxy Configuration Administrator Web Configurator Screens SIP Configuration SIP URI 13.3.1 G.711 2000WV2 User’s Guide SIP ConfigurationVoice Coding 13.3.2 G.729 Pstn Call Setup SignalingPhone Setting Same codec as the Prestige Quality of Service System Settings 13.8 ToS Introduction to DiffServ Troubleshooting Problems Starting Up the PrestigeProblems Using the Keypad Troubleshooting the Start-Up of Your Prestige Problems Accessing the Prestige Troubleshooting Accessing the Prestige Error Message Troubleshooting Restoring the Factory Default SettingsError Message Troubleshooting DhcpPage MIC Specification TablesHardware Specifications Essid 2000WV2 User’s Guide Firmware FeaturesHTTP, TFTP, TCP, UDP, DNS, ARP, Icmp Classes of IP Addresses IP AddressingIP Classes Subnet Masks SubnettingAllowed IP Address Range By Class Natural Masks Two Subnets Example Example Two SubnetsAlternative Subnet Mask Notation Subnet Example Four Subnets Class C Subnet Planning Example Eight SubnetsEight Subnets Subnetting With Class a and Class B Networks Class B Subnet PlanningPage Traditional Dial-up Scenario PPPoE in ActionBenefits of PPPoE How PPPoE Works Prestige as a PPPoE Client Wireless LAN Topologies Ad-hoc Wireless LAN Configuration ESS Roaming Infrastructure Wlan Requirements for Roaming Roaming Example 2000WV2 User’s Guide Page Index Numerics 711 24, 100 729 24, 101 IP-PBX PCM 100 130 Index Sales@voipon.co.uk Tel +44 01245 Fax +44 01245 Wlan