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Configuring with Web Based Management
5.5 "System" menu
SCALANCE W770/W730 to IEEE 802.11n Web Based Management
172 Configuration Manual, 11/2014, C79000-G8976-C323-03
5.5.12.4
SNTP Client
Time-of-day synchronization in the network
SNTP (
Simple Network Time Protocol
) is used for synchronizing the time in the network. The
appropriate frames are sent by an SNTP server in the network.
Description
The page contains the following boxes:
●
SNTP Client
Enable or disable automatic time-of-day synchronization using SNTP.
●
Current System Time
Shows the values currently set in the system for date and time.
●
Last Synchronization Time
This box is read-only and shows when the last time-of-day synchronization took place.
- -G8976-C323-03 1
- Legal information 2
- Table of contents 3
- Table of contents 5
- Introduction 9
- SIMATIC NET manuals 10
- Further documentation 11
- Abbreviations used 11
- SIMATIC NET glossary 12
- Description 13
- 2.1 Network structures 14
- Multichannel configuration 15
- Product characteristics 18
- IEEE 802.11n 20
- MIMO antenna technology 21
- Spatial mutliplexing 21
- Channel bonding 22
- Frame aggregation 22
- Accelerated guard interval 22
- Power over Ethernet (PoE) 24
- Endspan 25
- Midspan 25
- Cable lengths 26
- Technical basics 29
- Adopt Own MAC 30
- Layer 2 Tunnel 30
- 3.3 iPCF / iPCF-MC 31
- Technical basics 32
- 3.3 iPCF / iPCF-MC 32
- Restrictions 33
- Requirements for iPCF-MC 33
- How it works 33
- Requirement 34
- Advantages 34
- NAT/NAPT 36
- Introduction 37
- RSTP, MSTP, CIST 39
- 3.8 Spanning Tree 40
- Structure of an IP address 41
- Configuration options 42
- Properties of DHCP 42
- STEP 7 V5.x and earlier 44
- STEP 7 as of V13 44
- Web Based Management 45
- 5.2 Login 46
- 5.2 Login 47
- Login with HTTP 48
- Login with HTTPS 48
- "Wizard" menu 49
- Buttons you require often 50
- System Settings 50
- Country Settings 52
- IP Address Settings 53
- Management Interfaces 54
- System configuration 54
- Antenna Settings 56
- Radio Settings 57
- 5.3 "Wizard" menu 58
- Access Point Settings 60
- Client Settings 62
- 5.3.1.10 65
- Security Settings 65
- 5.3.1.11 68
- Dot1x Supplicant Settings 68
- 5.3.1.12 69
- Dot1x RADIUS Server Settings 69
- 5.3.1.13 70
- Summary of Settings 70
- Set Values 70
- "Information" menu 71
- Selection area (1) 73
- Display area (2) 73
- Navigation area (3) 74
- Content area (4) 74
- Versions 75
- I&M 77
- ARP Table 78
- Log Tables 79
- Description of the button 80
- WLAN Authentication Log 81
- Error status 82
- Redundancy 83
- Ethernet Statistics 87
- Displayed values 88
- Packet Size 88
- Frames sorted by length 88
- Learning Table 92
- 5.4.11.1 94
- Overview AP 94
- 5.4.11.2 97
- Client List 97
- Logged-on clients 97
- 5.4.11.3 98
- WDS List 98
- 5.4.11.4 100
- Overlap AP 100
- Overlapping channels 100
- Description 100
- 5.4.11.5 101
- Overview Client 101
- Available AP 103
- Available access points 103
- 5.4.11.6 103
- 5.4.11.7 105
- IP Mapping Table 105
- MAC Mode 106
- WLAN Statistics 107
- 5.4.12.2 109
- Management Sent 109
- 5.4.12.3 111
- Management Received 111
- 5.4.12.4 113
- Data Sent 113
- 5.4.12.5 115
- Data Received 115
- WLAN iFeatures 116
- 5.4.13.2 117
- 5.4.13.3 118
- AeroScout 118
- Security 120
- "System" menu 122
- Procedure 124
- General 125
- Coordinates 126
- Agent IP 128
- DNS Client 130
- Restart 131
- 5.5 "System" menu 132
- Commit Control 134
- Load&Save 135
- Passwords 143
- Configuration 145
- Selecting system events 145
- Severity Filter 147
- Setting the severity filter 147
- SMTP Client 148
- 5.5.10.1 150
- DHCP Client 150
- Setting the DHCP mode 150
- 5.5.10.2 152
- DHCP Server 152
- 5.5.10.3 154
- DHCP Options 154
- 5.5.10.4 156
- Static Leases 156
- 5.5.11.1 157
- Configuration of SNMP 157
- 5.5.11.3 160
- 5.5.11.4 162
- System Time 164
- 5.5.12.1 165
- Manual Setting 165
- 5.5.12.2 166
- DST Overview 166
- Settings 167
- 5.5.12.3 168
- DST Configuration 168
- 5.5.12.4 172
- SNTP Client 172
- 5.5.12.5 175
- NTP Client 175
- Auto Logout 178
- Syslog Client 179
- Fault Monitoring 180
- 5.5.15.2 182
- Link Change 182
- Settings for PROFINET IO 183
- SCALANCE W700 and STEP 7 184
- PNIO for client devices 185
- 5.5.17.1 185
- 5.5.17.2 188
- License 188
- "Interfaces" menu 192
- Configuring ports 193
- Basic settings 195
- Advanced 199
- Further possible settings 199
- Antennas 201
- Overview 201
- Steps in configuration 203
- Allowed Channels 204
- Channel settings 204
- 802.11n 206
- Properties of 802.11n 206
- AP 802.11a/b/g Rates 212
- AP 802.11n Rates 214
- 5.6.2.10 217
- Connecting to a network 217
- 5.6.2.11 220
- Signal Recorder 220
- Notes on usage 221
- Measurement results 222
- "Layer 2" menu 225
- Port-based VLAN 228
- Processing received frames 228
- Dynamic MAC Aging 230
- Spanning Tree 231
- CIST General 233
- MSTP-CIST configuration 233
- 5.7 "Layer 2" menu 234
- MST general 239
- MST Port 240
- DCP Forwarding 242
- "Layer 3" menu 245
- "Security" menu 248
- Safety levels 249
- AP Communication 252
- Communications options 252
- AP Radius Authenticator 254
- Client Radius Supplicant 256
- Client Supplicant 256
- Management ACL 258
- Inter AP blocking 260
- Allowed address 262
- "iFeatures" menu 263
- Access point mode 264
- Client mode 265
- When should iPCF-MC be used? 267
- When should iREF be used? 268
- Upkeep and maintenance 271
- Troubleshooting/FAQ 273
- Solution 274
- Mixed mode 275
- Troubleshooting/FAQ 276
- Appendix A 277
- Appendix A 278
- Appendix B 279
- Appendix B 280
- Appendix C 281
- Appendix C 282
- C.1 Underlying standards 282
- Appendix D 283
- Messages on configuration 284
- Messages error status 285
- Messages about MSTP 286
- Messages about security 286
- Messages about PLUG 287
- Messages in client mode 288
- Index 289
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