H3C Technologies H3C SecPath F1000-E - Manual (Page 214)

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Figure 107 DHCP relay agent configuration page
Table 32 Configuration items
Item Description
DHCP Service Enable or disable global DHCP.
Unauthorized Server
Detect
Enable or disable unauthorized DHCP server detection.
There are unauthorized DHCP servers on networks, which reply DHCP clients with
wrong IP addresses.
With this feature enabled, upon receiving a DHCP request, the DHCP relay agent
will record the IP address of any DHCP server that assigned an IP address to the
DHCP client and the receiving interface. The administrator can use this information to
check out DHCP unauthorized servers.
With the unauthorized DHCP server detection enabled, the device puts a record
once for each DHCP server. The administrator needs to find unauthorized DHCP
servers from the log information. After the information of recorded DHCP servers is
cleared, the relay agent will re-record server information following this mechanism.