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8–2 MULTILINK ML1200 MANAGED FIELD SWITCH – INSTRUCTION MANUAL
ACCESS USING TACACS+ CHAPTER 8: ACCESS USING TACACS+
8.1.2 TACACS+ Flow
TACACS works in conjunction with the local user list on the ML1200 software (operating
system). The process of authentication as well as authorization is shown in the flow chart
below.
FIGURE 8–1: TACACS Authorization Flowchart
The above flow diagram shows the tight integration of TACACS+ authentication with the
local user-based authentication. There are two stages a user goes through in TACACS+. The
first stage is authentication where the user is verified against the network user database.
The second stage is authorization, where it is determined whether the user has operator
access or manager privileges.
8.1.3 TACACS+ Packet
Packet encryption is a supported and is a configurable option for the ML1200 software.
When encrypted, all authentication and authorization TACACS+ packets are encrypted and
are not readable by protocol capture and sniffing devices such as EtherReal or others.
Packet data is hashed and shared using MD5 and secret string defined between the
MultiLink ML1200 Managed Field Switch and the TACACS+ server.
754716A1.CDR
Login
User in Local
User List ?
Yes
Is User Manager?
Yes
Login as Manager
Login as Operator
No
No
TACACS+ Enabled?
No
Logout
Yes
Authentication
failure
Logout
Authenticated
TACACS+
authorization
Authorized as
Operator or
Authorization failure
Authorized as
Manager
Login as Manager
Start
Additional
Servers?
Logout
Connection failure
No
Yes
Connect t o
TACACS server to
authenticate
Login as Operator
Additional
Servers?
- MultiLink ML1200 1
- Managed Field Switch 1
- *1601-9095-A1* 1
- Table of Contents 3
- TABLE OF CONTENTS 4
- TOC TABLE OF CONTENTS 5
- Chapter 1: Introduction 9
- 1.2 Order Codes 10
- 1.3 Specifications 11
- Made in USA 14
- 1.4.1 Console Connection 15
- 1.4.2 Console Setup 15
- 1.4.3 Console Screen 16
- 1.4.7 Privilege Levels 19
- 1.4.8 User Management 20
- 1.4.9 Help 21
- 1.4.10 Exiting 22
- FIGURE 1–3: Login screen 24
- 1.5.2 Privilege Levels 25
- 1.5.3 User Management 25
- 1.5.5 Help 30
- 1.5.6 Exiting 30
- 1.6 ML1200 Firmware Updates 32
- ML1200# xmodem get type=app 33
- 2.2 Features and Benefits 44
- 2.3 Applications 46
- Chapter 3: Installation 49
- 3.2 Connecting Ethernet Media 50
- Media IEEE Standard Connector 51
- 3.3 Mechanical Installation 54
- 3.4 Electrical Installation 56
- Console Port) 58
- Chapter 4: Operation 59
- 4.1.2 Status LEDs 60
- 4.2.2 ML1200 Modules 64
- Chapter 5: IP Addressing 73
- 5.2.1 DHCP and bootp 75
- 5.2.2 bootp Database 75
- 5.2.4 Using Telnet 77
- ML1200# show console 78
- 5.3 Setting Parameters 80
- 5.3.3 Date and Time 81
- 5.3.4 Network Time 82
- 5.4 System Configuration 86
- 5.4.4 Saving Configuration 92
- 5.4.5 Script File 94
- 5.4.7 Host Names 97
- 5.4.8 Erasing Configuration 99
- Kill Config option using SWM 99
- Kill Config option using CLI 101
- Name Areas affected 101
- 5.5 IPv6 103
- 5.5.3 IPv6 Addressing 104
- FIGURE 5–5: Configuring IPv6 105
- 5.5.4 Configuring IPv6 105
- Multilink ML1200 107
- 6.1.3 Port Security Feature 108
- 6.2.1 Commands 109
- 6.2.2 Allowing MAC Addresses 110
- 6.2.3 Security Logs 114
- 6.2.4 Authorized Managers 116
- 6.3.1 Commands 118
- 6.3.2 Logs 121
- 6.3.3 Authorized Managers 122
- 7.2.1 Commands 128
- 7.2.2 Example 130
- 7.3.1 Commands 133
- 8.1.2 TACACS+ Flow 140
- 8.1.3 TACACS+ Packet 140
- 754717A1.CDR 141
- 8.2.1 Commands 142
- 8.2.2 Example 142
- Z Save the settings 145
- 9.2.1 Commands 148
- 9.3 Port Setup 149
- 9.3.2 Flow Control 151
- 9.3.3 Back Pressure 151
- 9.3.4 Broadcast Storms 153
- 9.3.5 Link Loss Alert 155
- 9.4.1 Commands 157
- 9.4.2 Port Setup 158
- Port > Settings menu 159
- In these windows: 159
- 9.4.3 Broadcast Storms 161
- Chapter 10: VLAN 163
- VLAN CHAPTER 10: VLAN 164
- CHAPTER 10: VLAN VLAN 165
- FIGURE 10–3: VLAN routing 165
- 10.1.2 Tag VLAN vs. Port VLAN 165
- 10.2.1 Description 167
- 10.2.2 Commands 167
- 10.3.1 Description 169
- 10.4.1 Description 174
- 10.4.2 Commands 174
- 10.4.3 Example 175
- VLAN type to be Tag VLAN 176
- (continued on next page) 178
- 10.5.1 Description 181
- 11.1.3 GVRP Operations 188
- FIGURE 11–1: GVRP operation 188
- 754722A1.CDR 189
- 11.2.1 Commands 193
- 11.2.2 GVRP Operation Notes 193
- 11.3.1 Example 195
- Chapter 12: Spanning Tree 197
- Protocol (STP) 197
- 12.2 Configuring STP 199
- Protocol 209
- 13.2.1 Normal RSTP 212
- Configuring RSTP (continued) 218
- 13.3.1 Normal RSTP 223
- 14.1.3 DiffServ and QoS 232
- FIGURE 14–1: ToS and DSCP 232
- 14.1.4 IP Precedence 232
- 754726A1.CDR 233
- Data +FCS 233
- ToS byte 233
- IP precedence 233
- 14.2.1 Commands 234
- 14.2.2 Example 236
- Configuring QoS (continued) 237
- 14.3.1 Description 239
- Chapter 15: IGMP 243
- IGMP CHAPTER 15: IGMP 244
- CHAPTER 15: IGMP IGMP 245
- 15.1.3 IP Multicast Filters 246
- 15.1.5 IGMP Support 247
- 15.2.1 Commands 248
- 15.2.2 Example 250
- 15.3.1 Example 253
- Chapter 16: SNMP 255
- SNMP CHAPTER 16: SNMP 256
- CHAPTER 16: SNMP SNMP 257
- 16.1.3 Traps 257
- 16.1.4 Standards 257
- 16.2.1 Commands 259
- 16.2.2 Example 260
- 16.3.1 Example 265
- 16.4 Configuring RMON 269
- ML1200(rmon)## exit 270
- Chapter 17: Miscellaneous 271
- 17.1.2 Commands 272
- 17.1.3 Example 273
- 17.2 Statistics 275
- 17.3 Serial Connectivity 277
- 17.3.1 Description 277
- 17.4 History 278
- 17.5 Ping 279
- 17.6 Prompt 280
- 17.7 System Events 281
- 17.7.3 EnerVista Example 282
- 17.8 Command Reference 284
- 17.8.2 Configuration commands 286
- Chapter 18: Modbus Protocol 291
- For example 292
- 18.1.3 EnerVista Settings 293
- 18.2 Memory Mapping 294
- 18.2.2 Format Codes 327
- Appendix A 329
- A.2 Warranty 330
- Appendix B: DC Power Input 331
- B.6 Operation 337
- Appendix C: Internal DC Dual 339
- Source Power Input 339
- C.5 Installation 344
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