Configuring Authorized Server Addresses - HP ProCurve J8766A Release Note

ProCurve(config)# dhcp-snooping trust B1-B2
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
Store lease database : Not configured
Port Trust
----- -----
B1 Yes
B2 Yes
B3 No
Figure 13. Example of Setting Trusted Ports
DHCP server packets are forwarded only if received on a trusted port; DHCP server packets received
on an untrusted port are dropped.
Use the no form of the command to remove the trusted configuration from a port.

Configuring Authorized Server Addresses

If authorized server addresses are configured, a packet from a DHCP server must be received on a
trusted port AND have a source address in the authorized server list in order to be considered valid.
If no authorized servers are configured, all servers are considered valid. You can configure a
maximum of 20 authorized servers.
To configure a DHCP authorized server address, enter this command in the global configuration
context:
ProCurve(config)# dhcp-snooping authorized-server
: Yes
: 4
: Yes
: Yes
: mac
<ip-address>
Enhancements
Release L.10.09 Enhancements
37