DHCP S
NOOPING
C
OMMANDS
4-275
Command Mode
Global Configuration
Command Usage
If MAC address verification is enabled, and the source MAC address in
the Ethernet header of the packet is not same as the client’s hardware
address in the DHCP packet, the packet is dropped.
Example
This example enables MAC address verification.
Related Commands
ip dhcp snooping (4 -270)
ip dhcp snooping vlan (4 -272)
ip dhcp snooping trust (4 -273)
ip dhcp snooping information option
This command enables the DHCP Option 82 information relay for the
switch. Use the
no
form to disable this function.
Syntax
[no] ip dhcp snooping information option
Default Setting
Disabled
Command Mode
Global Configuration
Command Usage
• DHCP provides a relay 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.
Console(config)#ip dhcp snooping verify mac-address
Console(config)#
Summary of Contents for 6128L2
Page 2: ......
Page 21: ...CONTENTS xvii Glossary Index ...
Page 22: ...CONTENTS xviii ...
Page 26: ...TABLES xxii ...
Page 40: ...INTRODUCTION 1 10 ...
Page 54: ...INITIAL CONFIGURATION 2 14 ...
Page 193: ...PORT CONFIGURATION 3 139 Figure 3 61 Displaying Etherlike and RMON Statistics ...
Page 257: ...QUALITY OF SERVICE 3 203 Figure 3 90 Configuring Policy Maps ...
Page 313: ...COMMAND GROUPS 4 13 PE Privileged Exec VC VLAN Database Configuration ...
Page 592: ...TROUBLESHOOTING B 4 ...
Page 605: ......