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Cisco IOS Software Configuration Guide for Cisco Aironet Access Points
OL-5260-01
Chapter 15 Configuring Proxy Mobile IP
Understanding Proxy Mobile IP
• An authoritative access point on your network supporting proxy Mobile IP. The authoritative access
point uses a subnet map to keep track of the home agent information for all visiting client devices.
• A home agent. The home agent is a router on the visiting client’s home network that serves as the
anchor point for communication with the access point and the visiting client. The home agent
tunnels packets from a correspondent node on the Internet to the visiting client device.
• A foreign agent. The foreign agent is a router on your network that serves as the point of attachment
for the visiting client device when it is on your network, delivering packets from the home agent to
the visiting client.
Figure 15-1 shows the five participating devices.
Figure 15-1 Participating Devices in Proxy Mobile IP
How Proxy Mobile IP Works
The proxy Mobile IP process has four main phases. These sections describe each phase:
• Agent Discovery, page 15-3
• Subnet Map Exchange, page 15-4
• Registration, page 15-5
• Tunneling, page 15-5
Agent Discovery
During the agent discovery phase, the home agent and the foreign agent advertise their services on the
network by using the ICMP Router Discovery Protocol (IRDP). The access point listens to these
advertisements.
Internet
Foreign
agent
Access point
supporting proxy
Mobile IP
Home
agent
Access point
supporting proxy
Mobile IP
Client device
at home
Client device
visiting foreign
network
Authoritative
access point
supporting proxy
Mobile IP
81653
- Text Part Number: OL-5260-01 1
- CONTENTS 3
- 13 Configuring VLANs 13-1 10
- 14 Configuring QoS 14-1 10
- 18 Configuring SNMP 18-1 11
- 16 Configuring Filters 16-1 11
- 17 Configuring CDP 17-1 11
- Contents 12
- 22 Troubleshooting 22-1 14
- B Protocol Filters B-1 15
- C Supported MIBs C-1 15
- Audience 17
- Organization 17
- Conventions 19
- Related Publications 21
- Obtaining Documentation 21
- Documentation Feedback 22
- Cisco TAC Website 23
- Opening a TAC Case 23
- TAC Case Priority Definitions 23
- Overview 25
- Features 26
- Chapter 1 Overview 27
- Roaming Client Devices 28
- Management Options 28
- Before You Start 34
- Assigning Basic Settings 38
- Figure 2-5 Express Setup Page 40
- Using VLANs 44
- Express Security Types 44
- Express Security Limitations 45
- CLI Configuration Examples 46
- Example: Static WEP 47
- Example: EAP Authentication 48
- Example: WPA 50
- Using the IP Setup Utility 51
- Obtaining IPSU 52
- • Using Online Help, page 3-5 57
- Step 1 Start the browser 58
- Using Action Buttons 60
- Using Online Help 61
- Cisco IOS Command Modes 64
- Getting Help 65
- Abbreviating Commands 65
- Understanding CLI Messages 66
- Using Command History 66
- Using Editing Features 67
- Accessing the CLI 70
- Default RADIUS Configuration 80
- Services 83
- Management 88
- Authorization 88
- Setting up the DHCP Server 90
- Show Commands 91
- Understanding SSH 92
- Configuring SSH 93
- Configuring ARP Caching 94
- • Network Time Protocol 95
- • Manual configuration 95
- • User show commands 95
- Configuring NTP 96
- Default NTP Configuration 97
- Configuring NTP Associations 99
- OL-5260-01 102
- Setting the System Clock 105
- Configuring the Time Zone 106
- Configuring a System Name 109
- Understanding DNS 110
- Setting Up DNS 111
- Creating a Banner 112
- Configuring a Login Banner 114
- Configuring Radio Settings 115
- Access Point 117
- (Root Unit) 117
- (Repeater) 117
- Wired LAN 117
- Configuring Radio Data Rates 118
- Configuring Protected Ports 129
- Configuring Multiple SSIDs 133
- Understanding Multiple SSIDs 134
- Default SSID Configuration 135
- Creating an SSID 135
- Using Spaces in SSIDs 136
- Local Authenticator 139
- Configuration Overview 141
- Unblocking Locked Usernames 145
- Using Debug Messages 145
- Creating WEP Keys 149
- WEP Key Restrictions 150
- Example WEP Key Setup 151
- Using WPA Key Management 161
- Setting a Pre-Shared Key 168
- Configuring Group Key Updates 168
- Note To allow both WPA and 172
- Note To allow both 802.1x 172
- Radio Management 175
- Understanding WDS 176
- Configuring WDS on the WLSM 180
- Guidelines for WDS 181
- CLI Configuration Example 186
- Click Add/Edit 192
- Step 15 Click Submit 193
- Viewing WDS Information 195
- Configuring Radio Management 197
- Understanding RADIUS 200
- RADIUS Operation 201
- Configuring RADIUS 202
- Defining AAA Server Groups 207
- Starting RADIUS Accounting 210
- Selecting the CSID Format 211
- Understanding TACACS+ 219
- TACACS+ Operation 220
- Configuring TACACS+ 220
- Default TACACS+ Configuration 221
- Starting TACACS+ Accounting 224
- Configuring VLANs 227
- Understanding VLANs 228
- Related Documents 229
- VLAN Configuration Example 233
- Configuring QoS 237
- Precedence of QoS Settings 239
- Figure 14-2 QoS Policies Page 241
- QoS Configuration Examples 246
- Configuring Proxy Mobile IP 249
- Understanding Proxy Mobile IP 250
- How Proxy Mobile IP Works 251
- Subnet Map Exchange 252
- Registration 253
- Tunneling 253
- Configuration Guidelines 255
- Configuring Filters 259
- Understanding Filters 260
- Creating a MAC Address Filter 262
- Figure 16-6 IP Filters Page 267
- Creating an IP Filter 268
- Creating an Ethertype Filter 270
- Configuring CDP 273
- Understanding CDP 274
- Disabling and Enabling CDP 275
- Configuring SNMP 281
- Understanding SNMP 282
- SNMP Manager Functions 283
- SNMP Agent Functions 283
- SNMP Community Strings 283
- Default SNMP Configuration 285
- Enabling the SNMP Agent 285
- Configuring Community Strings 285
- Table 18-3 Notification Types 287
- SNMP Examples 289
- Displaying SNMP Status 290
- Default Configuration 294
- Guidelines for Repeaters 294
- Setting Up a Repeater 294
- Verifying Repeater Operation 295
- Understanding Hot Standby 298
- Verifying Standby Operation 300
- Copying Files 307
- Deleting Files 307
- Creating a tar File 308
- Extracting a tar File 309
- Working with Software Images 320
- System image file is 321
- Browser HTTP Interface 334
- Browser TFTP Interface 335
- System Log Message Format 338
- Setting a Logging Rate Limit 345
- Troubleshooting 349
- Ethernet 350
- CISCO AIRONET 350 SERIES 351
- WIRELESS ACCESS POINT 351
- Checking Basic Settings 353
- Using the MODE Button 354
- ...done initializing Flash 355
- Using the MODE button 356
- Using the CLI 358
- Channels and Antenna Settings 361
- Channels 362
- IEEE 802.11g (2.4-GHz Band) 363
- IEEE 802.11a (5-GHz Band) 364
- IEEE 802.11b (2.4-GHz Band) 365
- Protocol Filters 369
- Table B-1 Ethertype Protocols 370
- Table B-2 IP Protocols 371
- Table B-3 IP Port Protocols 372
- Supported MIBs 375
- Error and Event Messages 377
- Unzip Messages 381
- 802.11 Subsystem Messages 381
- Radio Diagnostic Messages 386
- Local Authenticator Messages 386
- GLOSSARY 387
- Glossary 388
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