Dhcp server planning | Nortel Networks NN43001-504 specification

DHCP server planning 37

handset performs a DNS lookup of the name SLNKSVP2, if Options 6 (DNS Server) and 15 (Domain Name) are conﬁgured.

•DHCP Option 152. If an optional WLAN Application Gateway 2246 is used in the system, its IP address can be speciﬁed with this option.

Each wireless handset effectively uses two IP addresses in the wireless subnet: one for the physical wireless handset and a second alias IP address that is used on the WLAN IP Telephony Manager 2245. When allocating addresses in a subnet scope on the DHCP server, a contiguous block of IP addresses as large as the number of wireless handsets supported must be marked as unavailable for distribution for other uses by the DHCP server.

When multiple WLANs are connected to a single Nortel Wireless Security Switch (WSS), the DHCP server can require speciﬁc conﬁguration modiﬁcations. For a speciﬁc WSS that is used for special DHCP conﬁguration requirements, see the WSS documentation.

The WLAN handsets support numerous DHCP extensions for assigning various conﬁguration options. The WLAN handsets supply a vendor class identiﬁer string, which in this case is Nortel-221x-A and Nortel-61xx-A. The WLAN handsets do not accept these options from the DHCP server encapsulated in a 43 Vendor Type option (which is the normal way vendor classes work). Consequently, you do not deﬁne these options as part of a vendor class on the DHCP server. Instead, you deﬁne them as new options that are assigned using the native code numbers that you give them.

The WLAN handsets speciﬁcally request a list of options in the DISCOVER message. The list of options (aside from the IP address and subnet mask) needed by a WLAN handset is:

•Class Identiﬁer (60)

•TFTP Server (66)

•Signaling Server Address and other parameters (43, 128, 144, 157, 191, or 251)

•WLAN IP Telephony Manager 2245 Address (151)

•WLAN Application Gateway 2246 Address (152)

For an example, see Figure 2 "Sample DHCP reservation showing assigned parameters" (page 38).

Nortel Communication Server 1000

WLAN IP Telephony Installation and Commissioning

NN43001-504 01.02 Standard

Release 5.0 15 June 2007

Copyright © 2004-2007, Nortel Networks

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Nortel Networks NN43001-504 manual Dhcp server planning

Contents

Wlan IP Telephony Installation and Commissioning Page June Revision historyMay August Revision history Contents Planning System information Installation Troubleshooting 119 Release Appendix C Compatible Access Points 223 Index 224 Procedures Copyright 2004-2007, Nortel Networks New in this release Feature descriptionOther changes Open and use the Admin menu on the handset Zones for wireless handsetsAdmin menu options for the Wlan Handset 6120/6140 Feature programming for the Wlan Handset 6120/6140 New messages are Error Server Unavailable. Restarting Wireless handset status messages New in this release Getting help over the phone from a Nortel Solutions Center How to get helpGetting help from the Nortel Web site Getting help through a Nortel distributor or reseller Subject Overview System migration Applicable systems Resources ConventionsNTPs Online Declaration of conformity Wireless telephone network descriptionShielded cable Wireless telephone network description Call Server Typical wireless telephone network conﬁguration Tftp Server Dhcp ServerFirewall Wlan Handset 2210/2211/2212 and Wlan Handset 6120/6140 Components Language Wi-Fi MultimediaLicenses Wi-Fi Protected Access Wired Equivalent PrivacyWi-Fi Protected Access2 Push-to-talk feature Loud noise environments Wlan IP Telephony Manager Wlan Application Gateway Access Points Handset switchover Handset switchoverLoss of signal Overview Challenges of integrating voice applications Planning Rate scaling and variable capacity High overhead Quality of Service Power adjustments and variable capacity Dhcp server planning Dhcp server planning Sample Dhcp reservation showing assigned parameters Tftp Server planning Tftp Server planning Syslog Server planning Access point planningRecommendation Access point requirement considerations for b radio Site Survey modeSite survey Frequencies used by b radio Network usage Effective site surveyMobility requirements Physical site study Example of AP placement RF transmission testingWalk-through and survey Solving overlap issues Solving coverage issuesSample AP placement diagram for b radio Network recommendation Network planningRadio assignment Network management Sample Access Control List Assessment through a Wlan site survey Assessment using NetIQ Vivinet Assessor Planning Enms 10.5 Ipsm overview Enms 10.5 Ipsm convergence view Network management Zones NetiQ Vivinet Diagnostics exampleCommunication Server 1000 Telephony Manager Other network design considerations Access Point interference Ssid options and limitations Example Single telephony Vlan implementation Layer 3 implementation Wlan IP Telephony Manager 2245 planning Installation requirementsCapacities Master Wlan IP Telephony Manager Wlan IP Telephony Manager 2245 groupsGroup capacities Total Handsets 2245 Calls Erlangs 10% use 15% use 20% use Wireless Managers Telephony Managers 2245 2245-10 2245-20 Not applicable Wlan IP Telephony Manager 2245 planning Mobility across different subnets when using Dhcp Access points on the same subnetGateway and timing function Roaming and handover Multicast Placement guidelines for the Wlan IP Telephony Manager Maximum delay, jitter and packet loss Jitter removal for packets going to the AP Example 1 End-to-end delay and packet loss for a LAN Example 2 End-to-end delay and packet loss for a WAN Planning Step Action End Wlan Application Gateway 2246 planning IP address planning IP addressing with Dhcp Planning worksheetsWlan IP Telephony Manager 2245 planning worksheet Required only if using the optional Wlan Application Gateway Bandwidth management System informationZones Current registration status of wireless handsets Codecs Wireless telephone type designationAlias IP address Call blocking RLR and SLR Jitter buffer Programmable rings and tones Gain adjustmentVirtual Ofﬁce Branch Ofﬁce Survivable Remote Gateway End-to-end QoS External Applications Server Network conﬁgurations NAT Traversal feature VPN design over a Layer 2 network VPN design over a Layer 3 network Not recommended VoWLAN design Dhcp Server location in a NAT environment Wlan IP Telephony Manager 2245 in a NAT environment Wlan Application Gateway 2246 in a NAT environment Tftp Server location in a NAT environmentNetwork conﬁguration 3 with Full Dhcp Server CS 1000 not supported Feature Feature full name Description CS 1000 features XAS IP Phone 2004 features KEM Supported on the Wlan Feature Handsets Description Required materials Installation Wlan IP Telephony Manager 2245 installation tasks Preinstallation checklistSupplied equipment About the front panel Wlan IP Telephony Manager 2245 front panel Wall-mount Procedure Rack-mounting the Wlan IP Telephony Manager Procedure Wall-mounting the Wlan IP Telephony ManagerRack-mount Power connection Wlan Application Gateway 2246 installationProcedure Connecting the power LAN connection Installation Introduction Wlan IP Telephony Manager 2245 conﬁgurationFunctional description Wlan IP Telephony Manager 2245 conﬁguration Connect to the Wlan IP Telephony Manager Conﬁguration tasksSerial port connection Telnet connection Conﬁgure the network Wlan IP Telephony Manager 2245 conﬁguration Save the conﬁguration Procedure Saving the conﬁguration Changing the master IP address Conﬁgure the Wlan IP Telephony Manager Conﬁgure the Wlan IP Telephony Manager 2245 Procedure Changing the password Change the password Procedure Changing a forgotten password Wlan IP Telephony Manager 2245 conﬁguration Adding a Wlan IP Telephony Manager 2245 to the system Administration and maintenanceChecking in to the Gateway Replacing a Wlan IP Telephony Manager Procedure Replacing a Wlan IP Telephony ManagerFailed master Wlan IP Telephony Manager Replacing the failed Wlan IP Telephony Manager Removing a Wlan IP Telephony Manager 2245 from the system Wireless handset scenariosChanging the master Wlan IP Telephony Manager View software version For a wireless handset Software updatesProcedure Viewing the software version For the Wlan IP Telephony Manager Update software on the Wlan Application Gateway Update software on the Wlan IP Telephony ManagerUpdate software on a wireless handset Lock the system Step Action Select Find Products A-Z Displays Wireless handset download messagesNormal download messages Normal download messages Message Description Failure and recovery messages Message Description Download failure or recovery messages Troubleshooting the Wlan IP Telephony Manager TroubleshootingError Status screen Network Status screen Software Version Numbers screen Troubleshooting the handset Troubleshooting the Wlan Application GatewaySpeed or duplex mismatch Context Conﬁguration problems Access Point problems Duplex mismatch Dropped callsNo ring Far-end echo Wireless handset status messages Message Description Action Message Description Action Message Description Action Power Off/End Call. Place Battery Low messagePress Power On/Start Call Low Battery and a beep NN43001-504 01.02 Standard Release 5.0 15 June Do not Power OFF Message Description Action Message Description Action Message Description Action Message Description Action LAN Message Description Action Message Description Action See Updating software LD 32 IDU command Using Call Server overlay commands LD 117 Inventory command LD 32 Stat commandLD 117 Stip command DsetShow command TPS CLI commands IsetReset and isetResetAll E2dsetShow commandIsetCount and isetGet UmsPolicyShow and umsUpdatePolicy UmsKernalJobsShow and umsUpgradeAllIsetShow, isetShowByTN, and isetShowByIP UsiLibTrace Before calling Nortel Technical Support Troubleshooting coverage issuesDetermining alias IP addresses Before calling Nortel Technical Support Troubleshooting NTTQ65AB NTTQ65BA Appendix a Wlan Application Gateway Model number Number of users System overviewWlan Application Gateway 2246 connections Front panel Ethernet switch connections NTTQ65xx Third-party applications Installing with a new system InstallationInstalling in an existing system Nurse-call systems Conﬁguring the Wlan Application Gateway 2246 IP address Procedure Installing the Wlan Application Gateway 04830130 Conﬁguration Task summary list Administration console navigationEnter Conﬁguring network parameters Conﬁguring the OAI Box Procedure Conﬁguring the network Connecting to the LAN Connect to the Application Server through an RS-232 port Connecting to the Application ServerRS-232 cable connection Connect to the Application Server through the LAN Pins on the connector FunctionConnect to Application Server through a modem Continuing conﬁguration through Telnet Connecting through Telnet Conﬁguring the Telephone Line Procedure Conﬁguring a telephone line Procedure Searching for a handset Procedure Deleting a handsetDeleting a handset Searching for a handset Procedure Programming a feature Feature programming Procedure Setting or changing a password Setting or changing a passwordSystem status Network status Procedure Viewing system status Software versions Viewing the network status Certiﬁcation testing Software Software updatesSoftware ﬁles File name Description Procedure Transferring the software using FTP Obtain software using FTP Procedure Loading software updates Tftp software updates Systems Handset Planning Worksheet Planning Worksheet for HandsetsDialing Port MAC Address User Name Ext IP Address if static Free the serial port for administrative purposes Site data-gathering tables Appendix B Troubleshooting Wlan IP Telephony installations System Information table System History table Site data-gathering tables Terminal proxy server Product-speciﬁc conﬁgurationAttachments Other Required table Handsets Wlan speciﬁc conﬁgurationWlan IP Telephony Manager Nortel Wlan Security Switch Nortel switchesCisco access points and switches Cisco Aironet 1200 Series Parameter Setting Importance Wlan Security Switch 2270 notes 1230 connected with 2950 and 2245 connected with 2950 Speciﬁc Cisco conﬁguration examples Connected the APs Connected to 1230 connected with 3560 and 2245 connected with 6509 AP1230 Connected to APs General Wlan conﬁguration Dhcp options Dhcp server options Dhcp options Appendix B Troubleshooting Wlan IP Telephony installations Dhcp support for handsets that emulate the IP Phone Appendix B Troubleshooting Wlan IP Telephony installations Dhcp options Appendix B Troubleshooting Wlan IP Telephony installations Copyright 2004-2007, Nortel Networks Appendix B Troubleshooting Wlan IP Telephony installations RF basics and AP conﬁguration Appendix B Troubleshooting Wlan IP Telephony installations Copyright 2004-2007, Nortel Networks Call or signalling-related issues TroubleshootingTypical call-related issues Issue Type Check for Diagnosis ﬂows Typical voice quality issues Issue Type Check for Voice-quality issues Handset error messages Short Error code Description Action Handset error messages Timing information Short Error code Description ActionTiming Wlan IP Telephony Manager Handset to To the AP Run Site Survey for the Wlan Handset 2210/2211/2212 Diagnostic Tools Ssid Ab7bc8 -28 100 2ae578 -48 200 2ae596 -56 Any Detl Alpha Diagnostics Mode SAWA2 Diagnostics Screen 4 displays the following information Syslog message contents Contents Syslog Mode Syslog message Contents Audio stats AStat Radio stats NStat AP TOO Busy Syslog reason codes Reason code Meaning Number Reason code Meaning Number Action Timeout Data capture Data checklistQuestions Dhcp scope Site-data required for the capture analysis Syslog capture conﬁguration Network diagram Procedure Using the CLI to capture a Signaling Server log Signaling Server log capture General data capture Procedure Obtaining the wired and wireless capturesPage Click Get Assert Data Network speech levels Network speech levels Reference documentsReferences Source and type Title Revision Comments Ieee Source and type Title Revision Comments Source and type Title Revision Comments Compatibility Appendix C Compatible Access Points Index Symbols/Numerics Index Wlan Page Wlan IP Telephony Installation and Commissioning