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Enhancements
Release L.10.09 Enhancements
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.
Figure 17. 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.
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.
■ ProCurve recommends running a time synchronization protocol such as SNTP in order to track
lease times accurately.
■ A remote server must be used to save lease information or there may be a loss of connectivity
after a switch reboot.
Syntax: show dhcp-snooping binding
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.
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
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