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Cisco Systems DL-2159-05 manual Proxy Mobile IP Explained, Mobile IP Traffic Pattern

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Chapter 6 Configuring Proxy Mobile IP

Introduction to Mobility in IP

Figure 6-3 The Mobile IP Traffic Pattern

MN

Correspondent

Host

Home

Agent

Internet

Foreign

Agent

Mobile

Node

-Traffic is sent from the MN directly to the Correspondent Host

-The Host replies to the source address of theMN

-The traffic is routed to the HA

-The HA tunnels the traffic to the CoA of the FA

-The FA forwards the traffic to the MN90542

When the mobile node roams back to its home network, it drops its registration with the home agent and the tunnel is removed. If more than one node has roamed from the same home network to the same foreign network, a single tunnel is used to service traffic for all mobile devices between those two tunnel end points.

The protocol used to exchange information between the home agent and mobile node is the Internet Control Message Protocol (ICMP) Router Discovery Protocol (IRDP). Extensions have been added to this protocol to accommodate Mobile IP operation. Mobile IP features on a Cisco router require the IP Plus Feature Set or better.

Proxy Mobile IP Explained

The Mobile IP operation detailed above relies upon the mobile node using specialized Mobile IP client software. This software provides the intelligence needed to communicate with other Mobile IP entities such as home and foreign agents, plus the ability to generate registrations as appropriate. However, there are a few aspects of this method that make it undesirable. They include the cost of client software, the amount of administration required to load it onto some (potentially large) number of devices, and the possibility that the population of mobile nodes may not be immediately known or may change over time.

Cisco Aironet 1200 Series Access Point Software Configuration Guide

	OL-2159-05	6-5

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Cisco Systems DL-2159-05 manual Proxy Mobile IP Explained, Mobile IP Traffic Pattern

Contents

Text Part Number OL-2159-05 Corporate HeadquartersCopyright 2001-2003, Cisco Systems, Inc All rights reserved Iii N T E N T SNavigating Using the Map Windows Native Vlan ID WEP Not Set on the Wireless Phone Vii Settings on the Authenticator ConfigurationViii Event Notifications SetupSetting Up Administrator Authorization Snmp Setup Ssid Xii Organization Audience and ScopeXiii Tip Means the following are useful tips ConventionsXiv Obtaining Documentation Related PublicationsCisco.com Xvi Documentation CD-ROMOrdering Documentation Documentation FeedbackXvii Obtaining Technical AssistanceCisco TAC Website Opening a TAC Case TAC Case Priority DefinitionsXviii Obtaining Additional Publications and InformationA P T E R OverviewKey Features Management Options Quality of Service SupportRoaming Client Devices These documents are available on Cisco.com What is QoS?Limitations and Restrictions Related DocumentsVlan Support What is a VLAN?Incorporating Wireless Devices into VLANs Vlan Example Level of AccessRoot Unit on a Wired LAN Network Configuration ExamplesAccess Points as Root Units on a Wired LAN Repeater Unit that Extends Wireless RangeAccess Point as Repeater Central Unit in an All-Wireless NetworkUsing the Management Interfaces Button/Link Description Using the Web-Browser InterfaceUsing the Web-Browser Interface for the First Time Using the Management Pages in the Web-Browser InterfaceMap Window with Network Ports Pages Expanded Navigating Using the Map WindowsPreparing to Use a Terminal Emulator Using the Command-Line InterfaceConnecting the Serial Cable Changing Settings with the CLISetting Up the Terminal Emulator Function Description Selecting Pages and SettingsUsing a Telnet Session Using SnmpApplying Changes to the Configuration Supported MIBs Radio Configuration and Basic Settings Express Setup Basic SettingsMAC Address Entering Basic SettingsExpress Setup page contains the following settings System NameDefault Gateway Configuration Server ProtocolDefault IP Address Default IP Subnet MaskRoot-Unit Access Points Radio Network Optimization Optimize Radio Network For Security Setup LinkSnmp Admin. Community Radio ConfigurationRadio Network Compatibility Ensure Compatibility With Entering Identity Information Settings on the AP Radio IdentificationService Set ID Ssid Primary Port SettingsDefault IP Address Default IP Subnet MaskEntering Radio Hardware Information Leap PasswordAP Radio Hardware page contains the following settings Settings on the AP Radio HardwareAllow Broadcast Ssid to Associate? Data Rates Enable World ModeMax. RTS Retries Transmit PowerFrag. Threshold RTS ThresholdSearch for Less-Congested Radio Channel Default Radio ChannelRestrict Searched Channels Receive Antenna and Transmit Antenna Entering Advanced Configuration InformationAP Radio Advanced Page for Internal Radio Packet Forwarding Settings on the AP Radio AdvancedAP Radio Advanced pages contain the following settings Requested StatusSsid For Use By Infrastructure Stations Default Multicast Address FiltersMaximum Multicast Packets/Second Radio Cell RoleClassify Workgroup Bridges as Network Infrastructure Use Aironet ExtensionsEthernet Encapsulation Transform Quality of Service Setup LinkVlan Setup Link Require Use of Radio FirmwareBroadcast WEP Key rotation interval sec Advanced Primary Ssid Setup LinkPreferred Access Points Temporal Key Integrity ProtocolRadio Preamble Radio ModulationNon-Root Mobility Ethernet ConfigurationEntering Ethernet Hardware Information Settings on the Ethernet IdentificationEthernet Hardware page contains the following settings Settings on the Ethernet HardwareSpeed Loss of Backbone Connectivity Action Loss of Backbone Connectivity # of SecsLoss of Backbone Connectivity Ssid Ethernet Advanced page contains the following settings Settings on the Ethernet AdvancedDefault Unicast and Multicast Address Filters Always Unblock Ethernet When STP is Disabled Default Unicast Address FilterOptimize Ethernet for OL-2159-05 Configuring VLANs Vlan setup page contains the following settings Settings on the Vlan SetupEntering Vlan Information Vlan 802.1Q Tagging 802.1Q Encapsulation ModeMaximum Number of Enabled Vlan IDs Vlan Summary Status LinkVlan Name Vlan Security PolicySingle Vlan ID which allows Unencrypted packets Optionally allow Encrypted packets on the unencrypted VlanTKIP/MIC Native Vlan ConfigurationBroadcast Domain Segmentation ParameterDeployment of Infrastructure and Non infrastructure Devices Primary and Secondary SSIDsVlan ID RADIUS-Based Vlan Access ControlVlan Criteria for Deploying Wireless VLANsWireless Vlan Deployment Example 5shows the wireless Vlan deployment scenario described above Creating the Native Vlan Using the Configuration ScreensObtaining and Recording Vlan ID and Setup Information Creating and Configuring VLANs on the Access PointVlan Setup Vlan ID #1 Setup Creating the Full- and Part-Time VLANs Creating the Guest Vlan Creating the Maintenance VlanCreating and Configuring the SSIDs AP Radio Internal Service Sets Configuring VLANs Wireless Vlan Deployment Example Enabling Vlan 802.1Q Tagging and Identifying the Native Vlan 11 AP Radio Service Sets Creating an Ssid for Infrastructure Devices Guidelines for Wireless Vlan DeploymentOL-2159-05 Configuring Filters and QoS Protocol Filtering Filter SetupEnter a descriptive filter set name in the Set Name field Creating a Protocol FilterFilter Set Enabling a Protocol Filter Address Filters MAC Address FilteringCreating a MAC Address Filter AP Radio Advanced AP Radio Primary Ssid QoS Configuration Use Symbol Extensions Settings on the Quality of Service SetupGenerate Qbss Element Traffic Category Applying QoSBy Station Send Igmp General Query10 Protocol Filters Setup 12 Vlan ID By VlanBy Filter 13 Filters Priority SettingBy Dscp Value By CoS Value17 Vlan Setup Wireless QoS Deployment Example18 Vlan ID #xx WEP Not Set on the Wireless Phone WEP Set on the Wireless Phone20 AP Radio Internal Service Sets 21 AP Radio Internal Service Sets OL-2159-05 Configuring Proxy Mobile IP Introduction to Mobility in IP Proxy Mobile IPMobile Approach Nomadic ApproachMobile IP Explained Mobile IP Environment Mobile IP Traffic Pattern Proxy Mobile IP ExplainedBefore Deploying Proxy Mobile IP Components of a Proxy Mobile IP Network Issues to Consider While Deploying Proxy Mobile IPAgent Discovery How Proxy Mobile IP WorksHome Agent Subnet Mask Subnet Map ExchangeTunneling RegistrationProxy Mobile IP Security Proxy Mobile IP SetupGeneral Proxy Mobile IP SetupAuthoritative AP n Authentication ServerSettings on the Proxy Mobile IP General Enable Proxy Mobile IPSettings on the Authenticator Configuration Local SA Bindings Settings on the Local SA BindingsStatistics Settings on the Proxy Mobile IP StatisticsMN IP Addresses Authentication Failures for HAAuthentication Failures for FA Active AAPSettings on the Subnet Map Table Configuring Proxy Mobile IPView Subnet Map Table Configuring Proxy Mobile IP on Your Wired LAN 11 a Sample Network 13 AP Radio Internal Service Sets 15 Proxy Mobile IP General 17 Subnet Map Table 18 Authenticator Configuration 20 Network Configuration Screen for an Access Point Client 22 Passed Authentication Screen Configuring Other Settings Entering Time Server Settings Server SetupSettings on the Time Server Setup Settings on the Boot Server Setup Entering Boot Server SettingsBoot Server Setup page contains the following settings Dhcp Multiple-Offer Timeout sec Configuration Server ProtocolUse Previous Configuration Server Settings Bootp Server Timeout secOption Definition Dhcp Requested Lease Duration minDhcp Minimum Lease Duration min Dhcp Client Identifier TypeDhcp Class Identifier Settings on the Web Server SetupWeb Server Setup page contains the following settings Dhcp Client Identifier ValueHttp Port Default Help Root URLDefault Web Root URL Allow Non-Console BrowsingDomain Name System Entering Name Server SettingsSettings on the Name Server Setup Default DomainDomain Name Servers Entering FTP SettingsSettings on the FTP Setup FTP Setup page contains the following settingsRouting Setup New Network Route Settings Entering Routing SettingsRouting Setup page contains the following settings Installed Network Routes list Association Table Display SetupAssociation Table Filters Configuring Other Settings Association Table Display Setup Stations to Show Settings on the Association Table FiltersFields to Show Primary Sort Association Table AdvancedPackets To/From Station Bytes To/From StationAssociation Table Advanced Settings on the Association Table AdvancedMaximum Number of Forwarding Table Entries Rogue AP Alert Timeout minutesHandle Station Alerts as Severity Level Maximum number of bytes stored per Station Alert packetDefault Activity Timeout seconds Per Device Class Event Notification SetupEvent Display Setup Settings on the Event Display SetupSeverity Level Description How should time generally be displayed?How should Event Elapsed non-wall-clock Time be displayed? Severity Level at which to display eventsEvent Handling Setup 10 The Event Handling Setup Maximum number of bytes stored per Alert packet Settings on the Event Handling SetupDisposition of Events Handle Station Events as Severity LevelClear Alert Statistics Event Notifications SetupPurge Trace Buffer Snmp Trap Community Settings on the Event Notifications SetupShould Notify-Disposition Events generate Snmp Traps? Snmp Trap DestinationIeee Snmp Traps Should Generate the Following Notifications Should Syslog Messages use the Cisco Emblem Format?Syslog Destination Address Syslog Facility NumberSecurity Setup Security Overview Encrypting Radio Signals with WEPLevels of Security Network Authentication Types Additional WEP Security FeaturesSequence for EAP Authentication Wired LAN Client Sequence for Open Authentication Combining MAC-Based, EAP, and Open AuthenticationProtecting the Access Point Configuration with User Manager Setting Up WEPTransmit? Key Contents Key Access Point Associated DeviceNot set Snmp Variable WEP Full WEP Off Enabling Additional WEP Security FeaturesUsing Snmp to Set Up WEP Enabling Message Integrity Check MICAP Radio Advanced Page for Internal Radio Enabling Temporal Key Integrity Protocol Tkip Enabling Broadcast WEP Key Rotation Setting Up Open or Shared Key Authentication Enabling EAP on the Access Point Setting Up EAP AuthenticationFirmware Version Draft 802.1x-2001 Access Point EAP Settings for Various Client Configurations Enabling EAP in Cisco Secure ACS Click Add New Access ServerSetting a Session-Based WEP Key Timeout Setting Up a Repeater Access Point As a Leap ClientAP Radio Identification Page for Internal Radio Enabling MAC-Based Authentication on the Access Point Setting Up MAC-Based Authentication11 Authenticator Configuration Security Setup Setting Up MAC-Based Authentication 12 AP Radio Advanced Authenticating Client Devices Using MAC Addresses or EAP Enabling MAC-Based Authentication in Cisco Secure ACS Authentication Types Required Settings Summary of Settings for Authentication TypesLeap EAP-TLS, EAP-MD5 Attribute ID Description Radius Attributes Sent by the Access PointVSA attribute Nas-location Vlan-id Auth-algo-type Acct-Delay-TimeAcct-Session-Id Acct-AuthenticAcct-Terminate-Cause Setting Up Backup Authentication ServersSetting Up Administrator Authorization Creating a List of Authorized Management System Users 14 Security Setup16 User Management Window Click Apply. You are returned to the User Information Setting up Centralized Administrator AuthenticationClick User Information. The User Information page appears Click Add New User. The User Management window appears18 Authenticator Configuration System Flow Notes Authorization Parameters Network Management Setting the Display Options Using the Association TableBrowsing to Network Devices Station Using Station PagesStation Identification and Status Information on Station PagesTo Station Information Rate, Signal, and Status InformationFrom Station Information Hops and Timing Information Performing Pings and Link TestsPerforming a Ping Click Link Test Performing a Link TestDeauthenticating and Disassociating Client Devices Using the Network Map WindowClearing and Updating Statistics Using Cisco Discovery Protocol MIB for CDP Settings on the CDP SetupPort Assignments Assigning Network PortsSettings on the Port Assignments Enabling Wireless Network AccountingAccounting Setup Settings on the Accounting SetupAttribute Definition Accounting AttributesRadiusipadr OL-2159-05 10-1 Managing Firmware and Configurations10-2 Full Update of the Firmware ComponentsUpdating Firmware Updating with the Browser from a Local Drive10-3 Selective Update of the Firmware Components10-4 Updating from a File Server10-5 Update All Firmware From File Server10-6 Update Firmware From File Server10-7 Retrieving Firmware and Web Page Files10-8 Distributing Firmware10-9 Distributing a Configuration10-10 Limiting Distributions10-11 Downloading the Current Configuration10-12 Uploading a ConfigurationUploading from a Local Drive Uploading from a File Server10-13 Resetting the Configuration10-14 Restarting the Access Point11-1 Management System SetupSettings on the Snmp Setup Snmp Setup11-2 Settings on the Database Query Using the Database Query11-3 Changing Settings with the Database Query Console and Telnet Setup11-4 Using Secure Shell Settings on the Console/Telnet11-5 11-6 12-1 Special Configurations12-2 Setting Up a Repeater Access Point12-3 12-4 12-5 Using Hot Standby Mode12-6 12-7 12-8 13-1 Sections in this chapter include13-2 Using Diagnostic PagesNetwork Diagnostics Selections on the Network Diagnostics13-3 Radio Diagnostics TestsSSIDs Int, Mod Vlan Summary Status13-4 13-5 Network PortsData Received Identifying Information and Status13-6 Ethernet Port Data Transmitted13-7 Receive Statistics Configuration Information13-8 Transmit Statistics AP Radio13-9 AP Radio Port 13-1013-11 13-12 Display OptionsEvent Log Display Settings13-13 13-14 Log HeadingsSaving the Log Event Log SummaryCommand Information Displayed Using Command-Line Diagnostics13-15 13-16 Entering Diagnostic CommandsEapdiag1on Diagnostic Command Results13-17 Vxdiagarpshow Eapdiag2on13-18 13-19 13-20 Vxdiagcheckstack13-21 Vxdiaghostshow13-22 Vxdiagi13-23 Vxdiagipstatshow13-24 Vxdiagmemshow13-25 Vxdiagmuxshow13-26 Vxdiagrouteshow13-27 Vxdiagtcpstatshow13-28 Reserving Access Point Memory for a Packet Trace Log FileTracing Packets Vxdiagudpstatshow13-29 Tracing Packets for Specific Devices13-30 Tracing Packets for Ethernet and Radio PortsViewing Packet Trace Data Packets Stored in a Log FilePackets Displayed on the CLI Checking the Top Panel Indicators13-31 13-32 Message Ethernet Status Radio Meaning Type Indicator13-33 Finding an Access Point by Blinking the Top Panel Indicators13-34 Checking Basic SettingsEAP Authentication Requires Matching 802.1x Protocol Drafts WEP Keys13-35 Firmware Version Draft13-36 Resetting to the Default Configuration13-37 13-38 Channels, Power Levels, and Antenna Gains Ieee 802.11a ChannelsRegulatory Domains Ieee 802.11b Maximum Power Levels and Antenna GainsAmericas -A 100 Eirp maximum 13.5 Emea -E MW Eirp maximum Maximum Power Level mWRegulatory Domain Antenna Gain dBi Maximum Power Level mW Regulatory Domain With 6-dBi Antenna GainRegulatory Domain Antenna Gain dBi Maximum Power Level mW OL-2159-05 Protocol Filter Lists ISO Designator ProtocolSmtp UDP XNS-IDP ISO-TP4 ISO-CNLP CnlpVines SVPPOP2 TftpHttp TsapRIP CmotBGP IRCCVS RadiusRFE Event Log Messages With a timestamp, messages look like this example Default FormatMessage Formats Cisco Emblem FormatLogalert LoginfoSyslog Severity Emblem Severity LogemergReason Message DescriptionsPossible Cause or Severity Event Description Mnemonic Recommended ActionHost DeviceSrchost NewaddrIfDescr Srchost to port ifDescr Desthost length pktLenReqlen bytes Packet from srchost to desthost IfDescr error= errornumDesthost on port ifDescr From srchost to desthost on port IfDescr error=erronumFor procedure on port ifDescr Srchost to desthost on portSrchost on port ifDescr Srchost to desthost of unknown VersionDesthost Prtrarpip SysrebootRebootinf AdminPort device Status PktLen IfDescr errno=errnoEthercon ENC WEPUnenc XidexpMedia port Frame Frame bytesUnit Username FailedUsername Port devName unitHstndbyeth 1XVERHstndbyen AssoclostNulses InstkeyAcctcon AmngrreqOpen NorbufNosbuf NoaservVlanID IfIndex Awcmib IfIndex MIBTaskstarted NomibdkeyBadsize TaskfailedSsidIdx Statuses and Reasons Appendix C Event Log Messages Statuses and Reasons OL-2159-05 IN-1 NumericsDtim CDP MIBDhcp CLIIN-3 Radio traffic Ethernet Locate unit by flashing LEDsIN-4 IN-5 PspfVlan SSHIN-6 IN-7 Warm restartIN-8