Cisco Catalyst 3750 Metro, Command Reference Manual

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Catalyst 3750 Metro Switch Command Reference
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Chapter 2 Catalyst 3750 Metro Switch Cisco IOS Commands
ip dhcp snooping database
ip dhcp snooping database
Use the ip dhcp snooping database global configuration command to configure the DHCP snooping
binding database agent. Use the no form of this command to disable the agent, to reset the timeout value,
or to reset the write-delay value.
ip dhcp snooping database {{flash:/ filename | ftp:// user:password@host/filename |
rcp:// user@host/filename | tftp:// host/filename } | timeout seconds | write-delay seconds }
no ip dhcp snooping database [ timeout | write-delay ]
Syntax Description
Defaults The URL for the database agent or binding file is not defined.
The timeout value is 300 seconds (5 minutes).
The write-delay value is 300 seconds (5 minutes).
Command Modes Global configuration
Command History
Usage Guidelines The DHCP snooping binding database can have up to 512 bindings.
To ensure that the lease time in the database is accurate, we recommend that Network Time Protocol
(NTP) is enabled and configured for these features:
•
NTP authentication
•
NTP peer and server associations
flash:/ filename Specify that the database agent or the binding file is in the flash
memory.
ftp:// user : password @ host / filename Specify that the database agent or the binding file is on an FTP
server.
rcp:// user @ host / filename Specify that the database agent or the binding file is on a
Remote Control Protocol (RCP) server.
tftp:// host / filename Specify that the database agent or the binding file is on a TFTP
server.
timeout seconds Specify (in seconds) when to stop the database transfer process
after the DHCP snooping binding database changes.
The default is 300 seconds. The range is from 0 to 86400. Use
0 to define an infinite duration.
write-delay seconds Specify (in seconds) the duration for which the transfer should
be delayed after the binding database changes. The default is
300 seconds. The range is from 15 to 86400.
Release Modification
12.2(25)EY This command was introduced.