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Configuration Fundamentals | 11
Multiple Users in Configuration Mode
FTOS notifies all users in the event that there are multiple users logged into CONFIGURATION mode. A
warning message indicates the username, type of connection (console or vty), and in the case of a vty
connection, the IP address of the terminal on which the connection was established. For example:
• On the system that telnets into the switch, the following example appears:
• On the system that is connected over the console, the following example appears:
If either of these messages appear, Dell Networking recommends coordinating with the users listed in the
message so that you do not unintentionally overwrite each other’s configuration changes.
Message 1 Multiple Users in Configuration Mode Telnet Message
% Warning: The following users are currently configuring the system:
User "<username>" on line console0
Message 2 Multiple Users in Configuration Mode Telnet Message
% Warning: User "<username>" on line vty0 "10.11.130.2" is in configuration mode
- Dell PowerEdge Configuration 1
- Notes, Cautions, and Warnings 2
- About this Guide 11
- Conventions 12
- Information Symbols 12
- Related Documents 12
- Configuration Fundamentals 13
- CLI Modes 14
- Navigating CLI Modes 15
- Undoing Commands 16
- Obtaining Help 17
- Entering and Editing Commands 18
- Command History 19
- Getting Started 23
- Front Panel 24
- Port Numbering 24
- Uplink Ports 25
- Stacking Ports 25
- Port Configuration 25
- Console access 26
- Boot Process 27
- 18 28
- Getting Started 29
- 20 30
- Getting Started 31
- Configure a Host Name 32
- Access the System Remotely 32
- Configure the Enable Password 34
- Configuration File Management 35
- View Files 39
- View Configuration Files 40
- File System Management 41
- View the Command History 42
- Upgrading FTOS 43
- 34 44
- Aggregator Management 45
- Disabling System Logging 46
- 38 48
- Aggregator Management 49
- File Transfer Services 50
- Enabling the FTP Server 51
- Terminal Lines 52
- Aggregator Management 55
- 46 56
- Data Center Bridging (DCB) 57
- Priority-Based Flow Control 58
- When DCB is Enabled 66
- Lossless Traffic Handling 67
- Enabling DCB on Next Reload 67
- Important: of two 68
- ETS Operation with DCBx 70
- DCBX Operation 71
- DCBx Operation 72
- DCBx Port Roles 72
- DCB Configuration Exchange 73
- DCBx Example 75
- DCBX Error Messages 77
- Verifying DCB Configuration 78
- DHCP Overview 93
- Relay Agent 95
- DHCP Client 96
- DHCP Client on a VLAN 102
- Configure Secure DHCP 103
- DHCP Snooping 104
- Clear the Binding Table 105
- Dynamic ARP Inspection 107
- command 108
- (Figure 6-9) 108
- Source Address Validation 109
- IP Source Address Validation 110
- FIP Snooping 113
- 104 114
- FIP Snooping 115
- 106 116
- FIP Snooping 117
- FIP Snooping on VLANs 118
- FC-MAP Value 118
- Bridge-to-FCF Links 118
- FIP Snooping Prerequisites 119
- FIP Snooping Restrictions 119
- 110 120
- Field Description 121
- FIP Snooping 123
- 114 124
- Raja: Can be re 126
- FIP Snooping Example 127
- Debugging FIP Snooping 128
- IGMP Overview 129
- Joining a Multicast Group 130
- Leaving a Multicast Group 130
- IGMP Packet 130
- IGMP Version 3 131
- IGMP Snooping 133
- Disabling Multicast Flooding 134
- Displaying IGMP Information 134
- Interfaces 137
- Interface Auto-Configuration 138
- Interface Types 138
- Viewing Interface Information 139
- 130 140
- Layer 2 Mode 142
- Management Interfaces 142
- interface 143
- (Figure 9-5) 144
- Interfaces 145
- {forwarding-router-address 145
- ManagementEthernet slot/port} 145
- VLAN Membership 146
- Port-Based VLANs 147
- VLANs and Port Tagging 147
- Configuring VLAN Membership 148
- Displaying VLAN Membership 149
- 140 150
- Port Channel Interfaces 151
- Port Channel Benefits 152
- Port Channel Implementation 152
- Interfaces 153
- 144 154
- Interfaces 155
- Interface Range 156
- Create a Multiple-Range 157
- Exclude a Smaller Port Range 157
- Overlap Port Ranges 157
- Interfaces 159
- Maintenance Using TDR 160
- rx off tx off 161
- MTU Size 162
- 154 164
- Interfaces 165
- Interfaces 167
- Clearing Interface Counters 168
- 160 170
- 162 172
- 164 174
- Link Aggregation 175
- Server-Facing LAGs 176
- LACP Modes 176
- Auto-Configured LACP Timeout 176
- LACP Example 177
- 168 178
- Link Aggregation 179
- 170 180
- Link Aggregation 181
- 172 182
- Clearing MAC Address Entries 183
- MAC Address Station Move 185
- MAC Move Optimization 185
- 176 186
- Overview 187
- Optional TLVs 188
- TIA-1057 (LLDP-MED) Overview 190
- LLDP-MED Capabilities TLV 192
- LLDP-MED Network Policies TLV 193
- Extended Power via MDI TLV 194
- LLDP Operation 195
- (Figure 13-10) 196
- Clearing LLDP Counters 198
- Debugging LLDP 199
- Relevant Management Objects 200
- Port Monitoring 205
- Port Monitoring 207
- Configuring Port Monitoring 208
- Port Monitoring 209
- 200 210
- Implementation Information 211
- Read Managed Object Values 212
- , as shown in Figure 15-5 214
- , as shown in Figure 15-6 214
- Deriving Interface Indices 217
- Monitor Port-channels 219
- Entity MIBS 220
- Stacking 223
- Stack Management Roles 224
- Stack Master Election 225
- Failover Roles 225
- MAC Addressing 226
- Stacking LAG 226
- Stacking VLANs 226
- Stacking Port Numbers 227
- Configuring a Switch Stack 227
- Stacking Prerequisites 228
- Cabling Stacked Switches 228
- Accessing the CLI 229
- Adding a Stack Unit 230
- Resetting a Unit on a Stack 231
- Using LEDs 232
- Using Show Commands 232
- Stacking 233
- 224 234
- Stacking 235
- Troubleshooting Commands 236
- Stacking 237
- Indicates master unit 237
- Indicates standby unit 237
- Failover type with redundancy 237
- Failure Scenarios 238
- Master Switch Fails 239
- Stack-Link Flapping Error 239
- 230 240
- Upgrading a Switch Stack 241
- Upgrading a Single Stack Unit 242
- Broadcast Storm Control 243
- 234 244
- System Time and Date 245
- Setting the Time Zone 247
- Setting Daylight Savings Time 248
- Feature Description 251
- UFD and NIC Teaming 253
- Important Points to Remember 254
- {interface interface 256
- [group-id] [detail] 258
- [group-id] 258
- Figure 19-5 260
- Command: UFD Output 260
- Figure 19-6 260
- Command: UFD Output 260
- Upgrade Procedures 263
- 254 264
- Debugging and Diagnostics 265
- Software show Commands 270
- Offline Diagnostics 272
- Trace Logs 273
- Show Hardware Commands 274
- Environmental Monitoring 275
- Buffer Tuning 279
- Deciding to Tune Buffers 281
- Buffer Tuning Commands 281
- buffer-profile [detail 282
- Troubleshooting Packet Loss 285
- Displaying Drop Counters 286
- Dataplane Statistics 287
- Application Core Dumps 290
- Mini Core Dumps 290
- TCP Dumps 292
- Default Settings 293
- Standards Compliance 295
- RFC and I-D Compliance 296
- General IPv4 Protocols 297
- Network Management 298
- Standards Compliance 299
- MIB Location 300
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