HP ProCurve J8766A Release Note page 46

Enhancements
Release L.10.09 Enhancements
Changing the Remote-id from a MAC to an IP Address
By default, DHCP snooping uses the MAC address of the switch as the remote-id in Option 82
additions. The IP address of the VLAN the packet was received on or the IP address of the
management VLAN can be used instead by entering this command with the associated parameter:
ProCurve(config)# dhcp-snooping option 82 remote-id
ProCurve(config)# dhcp-snooping option 82 remote-id subnet-
ip
ProCurve(config)# show dhcp-snooping
DHCP Snooping Information
DHCP Snooping
Enabled Vlans
Verify MAC
Option 82 untrusted policy : drop
Option 82 Insertion
Option 82 remote-id
Figure 15. Example of DHCP Snooping Option 82 using the VLAN IP Address
Disabling the MAC Address Check
DHCP snooping drops DHCP packets received on untrusted ports when the check address (chaddr)
field in the DHCP header does not match the source MAC address of the packet (default behavior).
To disable this checking, use the no form of this command.
ProCurve(config)# dhcp-snooping verify mac
40
<mac|subnet-ip|mgmt-ip>
: Yes
: 4
: Yes
: Yes
: subnet-ip