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DGS-3000 Series Layer 2 Managed Gigabit Switch Web UI Reference Guide
248
Chapter 9 Network Application
DHCP
DNS Resolver
PPPoE Circuit ID Insertion Settings
SMTP Settings
SNTP
Flash File System Settings
DHCP
DHCP Relay
DHCP Relay Global Settings
This window is used to enable and configure DHCP Relay Global Settings. The relay hops count limit allows the
maximum number of hops (routers) that the DHCP messages can be relayed through to be set. If a packet’s hop
count is more than the hop count limit, the packet is dropped. The range is between 1 and 16 hops, with a default
value of 4. The relay time threshold sets the minimum time (in seconds) that the Switch will wait before forwarding
a DHCPREQUEST packet. If the value in the seconds’ field of the packet is less than the relay time threshold, the
packet will be dropped. The range is between 0 and 65,535 seconds, with a default value of 0 seconds.
To view this window, click Network Application > DHCP > DHCP Relay > DHCP Relay Global Settings as
shown below:
Figure 9-1 DHCP Relay Global Settings window
The fields that can be configured are described below:
Parameter Description
DHCP Relay State
Use the drop-down menu to enable or disable the DHCP Relay service on the
Switch. The default is Disabled.
DHCP Relay Hops
Count Limit (1-16)
Enter an entry between 1 and 16 to define the maximum number of router hops
DHCP messages can be forwarded. The default hop count is 4.
DHCP Relay Time
Threshold (0-65535)
Enter an entry between 0 and 65535 seconds, and defines the maximum time limit
for routing a DHCP packet. If a value of 0 is entered, the Switch will not process the
value in the seconds’ field of the DHCP packet. If a non-zero value is entered, the
Switch will use that value, along with the hop count to determine whether to forward
a given DHCP packet.
DHCP Relay Option 82
State
Use the drop-down menu to enable or disable the DHCP Relay Agent Information
Option 82 on the Switch. The default is Disabled.
- Table of Contents 3
- Intended Readers 9
- Typographical Conventions 9
- Notes, Notices and Cautions 9
- Introduction 10
- Login to the Web Manager 10
- Web-based User Interface 11
- Web Pages 12
- Device Information 13
- System Information Settings 13
- Port Configuration 14
- DDM Status Table 20
- Port Settings 21
- Port Description Settings 23
- Port Error Disabled 24
- Port Media Type 25
- Jumbo Frame Settings 25
- Serial Port Settings 26
- Warning Temperature Settings 27
- System Log Configuration 28
- System Log 29
- System Severity Settings 30
- Time Range Settings 31
- Time Settings 31
- User Accounts Settings 32
- Command Logging Settings 33
- Chapter 3 Management 34
- Gratuitous ARP 35
- IPv6 Neighbor Settings 36
- IP Interface 37
- Interface Settings 39
- Management Settings 41
- Session Table 42
- Single IP Management 43
- Single IP Settings 44
- Topology 45
- Figure 3-16 Topology view 47
- Figure 3-20 Property window 49
- Firmware Upgrade 51
- SNMP Settings 52
- SNMP Global Settings 53
- SNMP Traps Settings 54
- SNMP View Table Settings 55
- SNMP Group Table Settings 57
- SNMP Engine ID Settings 57
- SNMP User Table Settings 58
- SNMP Host Table Settings 59
- SNMP v6Host Table Settings 59
- RMON Settings 60
- Telnet Settings 61
- Web Settings 61
- Power Saving 61
- Power Saving Settings 62
- Power Saving LED Settings 63
- Power Saving Port Settings 63
- Chapter 4 L2 Features 64
- 802.1Q VLAN Tags 66
- 802.1Q VLAN Settings 69
- 802.1v Protocol VLAN 72
- GVRP Global Settings 74
- GVRP Port Settings 74
- MAC-based VLAN Settings 75
- Private VLAN Settings 76
- PVID Auto Assign Settings 78
- Voice VLAN 78
- Voice VLAN Port Settings 79
- Voice VLAN OUI Settings 79
- Voice VLAN Device 80
- VLAN Trunk Settings 81
- Browse VLAN 81
- Show VLAN Ports 82
- QinQ Settings 84
- VLAN Translation Settings 85
- Spanning Tree 86
- STP Bridge Global Settings 88
- STP Port Settings 89
- STP Instance Settings 91
- MSTP Port Information 92
- Link Aggregation 93
- Port Trunking Settings 94
- LACP Port Settings 95
- Static FDB Settings 96
- MAC Notification Settings 97
- MAC Address Table 99
- ARP & FDB Table 99
- L2 Multicast Control 100
- IGMP Router Port 104
- IGMP Snooping Group 105
- IGMP Snooping Counter 106
- IGMP Host Table 107
- MLD Snooping 109
- MLD Snooping Settings 110
- MLD Router Port 113
- MLD Snooping Group 114
- MLD Snooping Counter 115
- MLD Host Table 116
- Multicast VLAN 117
- Multicast Filtering 120
- IPv6 Multicast Filtering 122
- ERPS Settings 125
- LLDP Global Settings 128
- LLDP Port Settings 129
- LLDP Management Address List 130
- LLDP Basic TLVs Settings 130
- LLDP Dot1 TLVs Settings 131
- LLDP Dot3 TLVs Settings 132
- LLDP Statistic System 133
- LLDP Local Port Information 134
- LLDP Remote Port Information 135
- LLDP-MED 136
- NLB FDB Settings 139
- Chapter 5 L3 Features 140
- Chapter 6 QoS 142
- 802.1p Settings 143
- Bandwidth Control 145
- Traffic Control Settings 147
- DSCP Trust Settings 150
- DSCP Map Settings 150
- Scheduling Settings 152
- QoS Scheduling Mechanism 153
- Chapter 7 ACL 155
- Access Profile List 156
- Add an Ethernet ACL Profile 157
- Adding an IPv4 ACL Profile 160
- Adding an IPv6 ACL Profile 165
- CPU Access Profile List 173
- ACL Finder 188
- ACL Flow Meter 188
- Figure 7-45 ACL Flow Meter 189
- Chapter 8 Security 192
- Figure 8-4 The Authenticator 193
- Figure 8-5 The Client 193
- 802.1X Global Settings 195
- 802.1X Port Settings 196
- 802.1X User Settings 197
- Guest VLAN Settings 198
- Authenticator State 199
- Authenticator Statistics 199
- Authenticator Diagnostics 202
- Initialize Port(s) 204
- Reauthenticate Port(s) 204
- RADIUS Accounting Settings 206
- RADIUS Authentication 206
- RADIUS Account Client 208
- IP-MAC-Port Binding (IMPB) 210
- IMPB Port Settings 211
- IMPB Entry Settings 212
- MAC Block List 213
- DHCP Snooping 213
- DHCP Snooping Entry 214
- ND Snooping 215
- JWAC Global Settings 220
- JWAC Port Settings 221
- JWAC User Settings 222
- JWAC Authentication State 223
- JWAC Customize Page Language 224
- JWAC Customize Page 224
- Compound Authentication 226
- Port Security 226
- Port Security VLAN Settings 228
- Port Security Entries 229
- BPDU Attack Protection 230
- Loopback Detection Settings 231
- NetBIOS Filtering Settings 233
- DHCP Server Screening 234
- Enable Admin 237
- Figure 8-62 Log-in Page 238
- Login Method Lists Settings 242
- Enable Method Lists Settings 243
- SSL Settings 244
- SSH Settings 247
- SSH User Authentication List 249
- Trusted Host Settings 250
- Safeguard Engine Settings 251
- IGMP Access Control Settings 254
- DHCP Relay 256
- DHCP Relay VLAN Settings 259
- DHCP Local Relay Settings 262
- DNS Resolver 263
- SMTP Settings 266
- SNTP Settings 267
- Time Zone Settings 268
- Flash File System Settings 270
- Chapter 10 OAM 272
- CFM Port Settings 276
- CFM MIPCCM Table 277
- CFM Loopback Settings 277
- CFM Linktrace Settings 278
- CFM Packet Counter 279
- CFM Fault Table 281
- CFM MP Table 281
- Ethernet OAM 282
- Ethernet OAM Event Log 284
- Ethernet OAM Statistics 285
- DULD Settings 286
- Cable Diagnostics 287
- Chapter 11 Monitoring 289
- Statistics 290
- Port Statistics 291
- UMB_Cast (RX) 292
- Transmitted (TX) 294
- Received (RX) 295
- Packet Size 298
- Port Mirror Settings 300
- Ping Test 301
- Trace Route 302
- Peripheral 303
- Chapter 12 Save and Tools 305
- Download Firmware From FTP 306
- Upload Firmware 307
- Upload Firmware To FTP 308
- Upload Firmware To HTTP 308
- Download Configuration 309
- Upload Configuration 310
- Upload Configuration To TFTP 311
- Upload Configuration To FTP 311
- Upload Configuration To HTTP 312
- Upload Log File 313
- Upload Log To HTTP 314
- Reboot System 315
- Appendix C Trap Log Entries 327
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