
C
HAPTER
30
| DHCP Commands
– 369 –
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 ES4528V-38
Page 1: ...Management Guide www edge core com 28 Port Gigabit Ethernet Switch...
Page 2: ......
Page 4: ......
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 75: ...CHAPTER 4 Configuring the Switch Creating Trunk Groups 75 Figure 11 LACP Port Configuration...
Page 186: ...CHAPTER 6 Performing Basic Diagnostics Running Cable Diagnostics 186...
Page 192: ...CHAPTER 7 Performing System Maintenance Managing Configuration Files 192...
Page 242: ...CHAPTER 12 Port Commands 242...
Page 248: ...CHAPTER 13 Link Aggregation Commands 248...
Page 266: ...CHAPTER 15 RSTP Commands 266...
Page 276: ...CHAPTER 16 IEEE 802 1X Commands 276...
Page 286: ...CHAPTER 17 IGMP Commands 286...
Page 294: ...CHAPTER 18 LLDP Commands 294...
Page 300: ...CHAPTER 19 MAC Commands 300...
Page 310: ...CHAPTER 21 PVLAN Commands 310...
Page 322: ...CHAPTER 22 QoS Commands 322...
Page 356: ...CHAPTER 26 SNMP Commands 356...
Page 359: ...CHAPTER 27 HTTPS Commands 359 EXAMPLE HTTPS redirect enable HTTPS...
Page 360: ...CHAPTER 27 HTTPS Commands 360...
Page 366: ...CHAPTER 29 UPnP Commands 366...
Page 374: ...CHAPTER 31 Firmware Commands 374...
Page 376: ...SECTION Appendices 376...
Page 390: ...GLOSSARY 390...
Page 395: ......