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DHCP Relay Interface Settings, DHCP Relay Option 82

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DWS-3160 Series Gigabit Ethernet Unified Switch Web UI Reference Guide NOTE: If the Switch receives a packet that contains the option 82 field from a DHCP client and the information-checking feature is enabled, the Switch drops the packet because it is invalid. However, in some instances, users may configure a client with the option 82 field. In this situation, disable the information check feature so that the Switch does not remove the option 82 field from the packet. Users may configure the action that the Switch takes when it receives a packet with existing option 82 information by configuring the DHCP Agent Information Option 82 Policy. The Implementation of DHCP Relay Agent Information Option 82 The DHCP Relay Option 82 command configures the DHCP relay agent information option 82 setting of the Switch. The formats for the circuit ID sub-option and the remote ID sub-option are as follows: NOTE: For the circuit ID sub-option of a standalone switch, the module field is always zero. Circuit ID sub-option format: Figure 12-2 Circuit ID Sub-option Format 1 Sub-option type 2 Length 3 Circuit ID type 4 Length 5 VLAN: The incoming VLAN ID of DHCP client packet. 6 Module: For a standalone switch, the Module is always 0; for a stackable switch, the Module is the Unit ID. 7 Port: The incoming port number of the DHCP client packet, the port number starts from 1. Remote ID sub-option format: Figure 12-3 Remote ID Sub-option Format 1 Sub-option type 2 Length 3 Remote ID type 4 Length 5 MAC address: The Switch's system MAC address. DHCP Relay Interface Settings This window is used to set up a server, by IP address, for relaying DHCP information to the Switch. The user may enter a previously configured IP interface on the Switch that will be connected directly to the DHCP server using 268

Section	Page
Table of Contents	3
Intended Readers	6
Typographical Conventions	6
Notes, Notices and Cautions	6
Section 1 Web-based Switch Configuration	7
Chapter 1 Introduction	7
Chapter 2 Login to the Web Manager	7
Chapter 3 Web-based User Interface	8
Areas of the User Interface	8
Chapter 4 Web Pages	9
Section 2 LAN	11
Chapter 1 System Configuration	11
Device Information	11
System Information Settings	12
Port Configuration	12
PoE	16
Serial Port Settings	19
Warning Temperature Settings	19
System Log Configuration	20
Time Range Settings	23
Port Group Settings	24
Time Settings	24
User Accounts Settings	25
Command Logging Settings	26
Chapter 2 Management	27
ARP	27
Gratuitous ARP	28
IPv6 Neighbor Settings	30
IP Interface	31
Management Settings	35
Session Table	36
Single IP Management	37
SNMP Settings	46
Telnet Settings	55
Web Settings	55
Chapter 3 L2 Features	56
VLAN	56
QinQ	74
Spanning Tree	77
Link Aggregation	84
FDB	87
L2 Multicast Control	91
Multicast Filtering	113
ERPS Settings	118
LLDP	121
NLB FDB Settings	130
Chapter 4 L3 Features	131
IPv4 Static/Default Route Settings	131
IPv4 Route Table	132
IPv6 Static/Default Route Settings	132
IP Forwarding Table	133
VRRP	133
Chapter 5 QoS	138
802.1p Settings	139
Bandwidth Control	141
Traffic Control Settings	143
DSCP	145
HOL Blocking Prevention	147
Scheduling Settings	147
Chapter 6 ACL	150
ACL Configuration Wizard	150
Access Profile List	151
CPU Access Profile List	167
ACL Finder	181
ACL Flow Meter	181
Egress Access Profile List	184
Egress ACL Flow Meter	196
Chapter 7 Security	199
802.1X	199
RADIUS	211
IP-MAC-Port Binding (IMPB)	215
MAC-based Access Control (MAC)	220
Compound Authentication	223
Port Security	226
ARP Spoofing Prevention Settings	228
BPDU Attack Protection	229
Loopback Detection Settings	230
Traffic Segmentation Settings	231
NetBIOS Filtering Settings	232
DHCP Server Screening	233
Access Authentication Control	235
SSL Settings	243
SSH	245
Trusted Host Settings	249
Safeguard Engine Settings	249
Captive Portal (CP)	251
Chapter 8 Network Application	271
DHCP	271
SNTP	277
Flash File System Settings	279
Chapter 9 OAM	281
CFM	281
Ethernet OAM	291
Cable Diagnostics	295
Chapter 10 Monitoring	297
Utilization	297
Statistics	298
Received (RX)	299
UMB_Cast (RX)	300
Transmitted (TX)	302
Received (RX)	303
Transmitted (TX)	305
Mirror	308
sFlow	310
Ping Test	313
Trace Route	314
Peripheral	315
Chapter 11 Save and Tools	316
Section 3 WLAN	317
Chapter 1 Security	317
Captive Portal (CP)	317
Chapter 2 Monitoring	336
Global	336
Peer Switch	344
Access Point	347
Client	368
QoS	387
Chapter 3 Administration	395
Basic Setup	395
AP Management	407
Advanced Configuration	416
Chapter 4 QoS	443
Access Control Lists	443
Differentiated Services	456
Chapter 5 Network Visualization	462
Download Image	462
Launch…	462
Section 4 Save and Tools	465
Chapter 1 Save	465
Save Configuration / Log	465
Chapter 2 Tools	466
License Management	466
Download Firmware	466
Upload Firmware	467
Download Configuration	467
Upload Configuration	468
Upload Log File	469
Reset	470
Reboot System	471
Appendices	473
Appendix A Mitigating ARP Spoofing Attacks Using Packet Content ACL	473
Appendix B Password Recovery Procedure	479
Appendix C System Log Entries	480
Appendix D Trap Log Entries	491
Appendix E RADIUS Attributes Assignment	495

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DWS-3160 Series Gigabit Ethernet Unified Switch Web UI Reference Guide

268

NOTE:

If the Switch receives a packet that contains the option 82 field from a DHCP client and the

information-checking feature is enabled, the Switch drops the packet because it is invalid.

However, in some instances, users may configure a client with the option 82 field. In this

situation, disable the information check feature so that the Switch does not remove the option

82 field from the packet. Users may configure the action that the Switch takes when it receives

a packet with existing option 82 information by configuring the DHCP Agent Information Option

82 Policy.

The

DHCP Relay Option 82

command configures the DHCP relay agent information option 82 setting of the

Switch. The formats for the circuit ID sub-option and the remote ID sub-option are as follows:

The Implementation of DHCP Relay Agent Information Option 82

NOTE:

For the circuit ID sub-option of a standalone switch, the module field is always zero.

Circuit ID sub-option format:

Figure 12-2 Circuit ID Sub-option Format

Sub-option type

Length

Circuit ID type

Length

VLAN: The incoming VLAN ID of DHCP client packet.

Module: For a standalone switch, the Module is always 0; for a stackable switch, the Module is the Unit ID.

Port: The incoming port number of the DHCP client packet, the port number starts from 1.

Remote ID sub-option format:

Figure 12-3 Remote ID Sub-option Format

Sub-option type

Length

Remote ID type

Length

MAC address: The Switch’s system MAC address.

DHCP Relay Interface Settings

This window is used to set up a server, by IP address, for relaying DHCP information to the Switch. The user may

enter a previously configured IP interface on the Switch that will be connected directly to the DHCP server using