182
DHCP Snooping
Example
The following example configures the switch to verify on an untrusted port that the source MAC address
in a DHCP packet matches the client hardware address.
ip dhcp snooping database
The
ip dhcp snooping database
Global Configuration mode command configures the DHCP snooping
binding file. Use the
no
form of this command to delete the binding file.
Syntax
•
ip dhcp snooping database
•
no ip dhcp snooping database
Default Configuration
The URL is not defined.
Command Mode
Global Configuration mode.
User Guidelines
•
To ensure that the lease time in the database is accurate, Simple Network Time Protocol (SNTP) is
enabled and configured.
•
The switch writes binding changes to the binding file only when the switch system clock is
synchronized with SNTP.
Example
The following example configures the DHCP snooping binding file.
ip dhcp snooping database update-freq
The
ip dhcp snooping database update-freq
Global Configuration mode command configures the update
frequency ofthe DHCP snooping binding file. Use the
no
form of this command to return to default.
Syntax
•
ip dhcp snooping database update-freq
seconds
•
no ip dhcp snooping database update-freq
•
seconds
— Specify, in seconds, the update frequency.
console (config)#
ip dhcp snooping verify
console (config)#
ip dhcp snooping database
5400_CLI.book Page 182 Wednesday, December 17, 2008 4:33 PM
Содержание PowerConnect 5424
Страница 114: ...114 Address Table Commands 5400_CLI book Page 114 Wednesday December 17 2008 4 33 PM ...
Страница 178: ...178 Ethernet Configuration Commands 5400_CLI book Page 178 Wednesday December 17 2008 4 33 PM ...
Страница 194: ...194 GVRP Commands 5400_CLI book Page 194 Wednesday December 17 2008 4 33 PM ...
Страница 204: ...204 IGMP Snooping Commands 5400_CLI book Page 204 Wednesday December 17 2008 4 33 PM ...
Страница 252: ...252 Line Commands 5400_CLI book Page 252 Wednesday December 17 2008 4 33 PM ...
Страница 268: ...268 LLDP Commands 5400_CLI book Page 268 Wednesday December 17 2008 4 33 PM ...
Страница 280: ...280 PHY Diagnostics Commands 5400_CLI book Page 280 Wednesday December 17 2008 4 33 PM ...
Страница 288: ...288 Port Monitor Commands 5400_CLI book Page 288 Wednesday December 17 2008 4 33 PM ...
Страница 300: ...300 QoS Commands 5400_CLI book Page 300 Wednesday December 17 2008 4 33 PM ...
Страница 308: ...308 Radius Commands 5400_CLI book Page 308 Wednesday December 17 2008 4 33 PM ...
Страница 326: ...326 RMON Commands 5400_CLI book Page 326 Wednesday December 17 2008 4 33 PM ...
Страница 386: ...386 SSH Commands 5400_CLI book Page 386 Wednesday December 17 2008 4 33 PM ...
Страница 400: ...400 Syslog Commands 5400_CLI book Page 400 Wednesday December 17 2008 4 33 PM ...
Страница 418: ...418 System Management 5400_CLI book Page 418 Wednesday December 17 2008 4 33 PM ...
Страница 432: ...432 TIC Commands 5400_CLI book Page 432 Wednesday December 17 2008 4 33 PM ...
Страница 440: ...440 Tunnel 5400_CLI book Page 440 Wednesday December 17 2008 4 33 PM ...
Страница 476: ...476 Voice VLAN 5400_CLI book Page 476 Wednesday December 17 2008 4 33 PM ...
Страница 490: ...490 Web Server 5400_CLI book Page 490 Wednesday December 17 2008 4 33 PM ...