C
HAPTER
30
| DHCP Commands
– 365 –
D
EFAULT
S
ETTING
Disabled
C
OMMAND
U
SAGE
◆
DHCP also provides a mechanism for sending information about the
switch and its DHCP clients to the DHCP server. Known as DHCP Option
82, it allows compatible DHCP servers to use the information when
assigning IP addresses, or to set other services or policies for clients.
◆
Using DHCP Relay Option 82, clients can be identified by the VLAN and
switch port to which they are connected rather than just their MAC
address. DHCP client-server exchange messages are then forwarded
directly between the server and client without having to flood them to
the entire VLAN.
E
XAMPLE
DHCP/Relay/Information>mode enable
DHCP/Relay/Information>
dhcp relay
information policy
This command displays or sets the DHCP relay policy for DHCP client
packets that include Option 82 information.
S
YNTAX
dhcp relay information policy
[
replace
|
keep
|
drop
]
replace
- Overwrites the DHCP client packet information with the
switch's relay information.
keep
- Retains the client's DHCP information.
drop
- Drops the packet when it receives a DHCP message that
already contains relay information.
D
EFAULT
S
ETTING
Replace Option 82 information
E
XAMPLE
DHCP/Relay/Information>policy keep
DHCP/Relay/Information>
dhcp relay statistics
This command displays or clears DHCP relay statistics.
S
YNTAX
dhcp relay statistics
[
clear
]
clear
- Clears DHCP relay statistics.
Summary of Contents for 8028L2
Page 1: ...MANAGEMENT GUIDE TigerSwitchTM 10 100 1000 28 Port Gigabit Ethernet Switch SMC8028L2 ...
Page 6: ...ABOUT THIS GUIDE 6 ...
Page 22: ...FIGURES 22 ...
Page 26: ...SECTION Getting Started 26 ...
Page 46: ...CHAPTER 2 Initial Switch Configuration Managing System Files 46 ...
Page 48: ...SECTION Web Configuration 48 ...
Page 144: ...CHAPTER 4 Configuring the Switch Configuring DHCP Relay and Option 82 Information 144 ...
Page 184: ...CHAPTER 6 Performing Basic Diagnostics Running Cable Diagnostics 184 ...
Page 238: ...CHAPTER 12 Port Commands 238 ...
Page 244: ...CHAPTER 13 Link Aggregation Commands 244 ...
Page 262: ...CHAPTER 15 RSTP Commands 262 ...
Page 272: ...CHAPTER 16 IEEE 802 1X Commands 272 ...
Page 282: ...CHAPTER 17 IGMP Commands 282 ...
Page 290: ...CHAPTER 18 LLDP Commands 290 ...
Page 296: ...CHAPTER 19 MAC Commands 296 ...
Page 306: ...CHAPTER 21 PVLAN Commands 306 ...
Page 318: ...CHAPTER 22 QoS Commands 318 ...
Page 352: ...CHAPTER 26 SNMP Commands 352 ...
Page 355: ...CHAPTER 27 HTTPS Commands 355 EXAMPLE HTTPS redirect enable HTTPS ...
Page 356: ...CHAPTER 27 HTTPS Commands 356 ...
Page 362: ...CHAPTER 29 UPnP Commands 362 ...
Page 370: ...CHAPTER 31 Firmware Commands 370 ...
Page 372: ...SECTION Appendices 372 ...
Page 386: ...GLOSSARY 386 ...
Page 391: ...INDEX 391 ...
Page 392: ...149100000079A R01 SMC8028L2 ...