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Configuring Advanced Threat Protection

DHCP Snooping

A message is logged in the system event log if the DHCP binding database fails

to update.

To display the contents of the DHCP snooping binding database, enter this

command.

Syntax: show dhcp-snooping binding

ProCurve(config)# show dhcp-snooping binding

MacAddress IP VLAN Interface Time left

------------- --------------- ---- --------- ---------

22.22.22.22.22.22 10.0.0.1 4 B2 1600

Figure 10-8. Example Showing DHCP Snooping Binding Database Contents

Note If a lease database is configured, the switch drops all DHCP packets until the

lease database is read. This only occurs when the switch reboots and is

completed quickly. If the switch is unable to read the lease database from the

tftp server, it waits until that operation times out and then begins forwarding

DHCP packets.

Enabling Debug Logging

To enable debug logging for DHCP snooping, use this command.

Syntax: [no] debug dhcp-snooping [agent | event | packet]

agent Displays DHCP snooping agent messages.

event Displays DHCP snooping event messages.

packet Displays DHCP snooping packet messages.

Operational Notes

■ DHCP is not configurable from the web management interface or menu

interface.

■ If packets are received at too high a rate, some may be dropped and need

to be re-transmitted.

10-12

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