D-Link DXS-3600 Series Cli Reference Manual page 382

DXS-3600 Series Layer 3 Managed 10Gigabit Ethernet Switch CLI Reference Guide
Command Mode
Global Configuration Mode.
Command Default Level
Level: 12.
Usage Guideline
The DHCP snooping function validates the DHCP packets when it arrives at the port on the VLAN that is
enabled for DHCP snooping. By default, the validation process will drop the packet if the gateway
address is not equal to 0 or Option 82 is present.
Use this command to allow packets with the relay Option 82 arriving at the untrusted interface.
Example
This example shows how to enable DHCP snooping for Option 82 to allow untrusted ports.
Switch# configure terminal
Switch(config)# ip dhcp snooping information option allow-untrusted
Switch(config)#
24-3 ip dhcp snooping database
This command is used to configure the storing of DHCP snooping binding entries to the local flash or a
remote site. Use the no command to disable the storing or reset the parameters to the default setting.
ip dhcp snooping database {URL | write-delay SECONDS}
no ip dhcp snooping database [write-delay]
Parameters
URL
write-delay SECONDS
Default
By default, the URL for the database agent is not defined.
The write delay value is set to 300 seconds.
Command Mode
Global Configuration Mode.
Command Default Level
Level: 12.
Usage Guideline
Specifies the URL in one of the following forms:
•
ftp://username:password@location:tcpport/filename
•
tftp://location/filename
•
flash:/filename
Note: The flash option only includes the external memory (like
CF/SD/USB storage).
Specifies the time delay to write the entries after a change is seen in
the binding entry. The default is 300 seconds. The range is from 60 to
86400.
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