Cisco Systems WSC4500X16SFP Manual De Usuario
31-7
Software Configuration Guide—Release 12.2(25)SG
OL-7659-03
Chapter 31 Configuring DHCP Snooping and IP Source Guard
Configuring DHCP Snooping on the Switch
Configuration Examples for the Database Agent
The following examples show how to use the above commands.
Example 1: Enabling the Database Agent
The following example shows how to configure the DHCP snooping database agent to store the bindings
at a given location and to view the configuration and operating state:
at a given location and to view the configuration and operating state:
Switch# configure terminal
Switch(config)# ip dhcp snooping database tftp://10.1.1.1/directory/file
Switch(config)# end
Switch# show ip dhcp snooping database detail
Agent URL : tftp://10.1.1.1/directory/file
Write delay Timer : 300 seconds
Abort Timer : 300 seconds
Agent Running : No
Delay Timer Expiry : 7 (00:00:07)
Abort Timer Expiry : Not Running
Last Succeded Time : None
Last Failed Time : 17:14:25 UTC Sat Jul 7 2001
Last Failed Reason : Unable to access URL.
Total Attempts : 21 Startup Failures : 0
Successful Transfers : 0 Failed Transfers : 21
Successful Reads : 0 Failed Reads : 0
Successful Writes : 0 Failed Writes : 21
Media Failures : 0
First successful access: Read
Last ignored bindings counters :
Binding Collisions : 0 Expired leases : 0
Invalid interfaces : 0 Unsupported vlans : 0
Parse failures : 0
Last Ignored Time : None
Total ignored bindings counters:
Binding Collisions : 0 Expired leases : 0
Invalid interfaces : 0 Unsupported vlans : 0
Parse failures : 0
Switch#
The first three lines of output show the configured URL and related timer configuration values. The next
three lines show the operating state and the amount of time left for expiry of write delay and abort timers.
three lines show the operating state and the amount of time left for expiry of write delay and abort timers.
Among the statistics shown in the output, startup failures indicate the number of attempts the read or
create of the file has failed upon bootup.
create of the file has failed upon bootup.
Note
Because the location is based off in the network, you must create a temporary file on the TFTP server.
You can create a temporary file on a typical UNIX workstation by creating a 0 byte file “file” in the
directory “directory” that can be referenced by the TFTP server daemon. With some server
implementations on UNIX workstations, the file should be provided with full (777) permissions for write
access to the file.
You can create a temporary file on a typical UNIX workstation by creating a 0 byte file “file” in the
directory “directory” that can be referenced by the TFTP server daemon. With some server
implementations on UNIX workstations, the file should be provided with full (777) permissions for write
access to the file.