R3721-F3210-F3171-HP High-End Firewalls Network Management Command Reference-6PW101

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dhcp relay server-detect
Syntax
dhcp relay server-detect
undo dhcp relay server-detect
View
System view
Default level
2: System level
Parameters
None
Description
Use dhcp relay server-detect to enable unauthorized DHCP server detection.
Use undo dhcp relay server-detect to disable unauthorized DHCP server detection.
By default, unauthorized DHCP server detection is disabled.
With this function enabled, upon receiving a DHCP request, the DHCP relay agent resolve from the
request the IP addresses of all DHCP servers which ever offered IP addresses to the DHCP client and the
receiving interface. Each server detected is recorded only once. The administrator can use this
information from logs to check for unauthorized DHCP servers.
After the information of recorded DHCP servers is cleared, the relay agent re-record server information
following this mechanism.
Examples
# Enable unauthorized DHCP server detection.
<Sysname> system-view
[Sysname] dhcp relay server-detect
dhcp relay server-group
Syntax
dhcp relay server-group group-id ip ip-address
undo dhcp relay server-group group-id [ ip ip-address ]
View
System view
Default level
2: System level
Parameters
group-id: DHCP server group number, in the range of 0 to 19.
ip ip-address: DHCP server IP address.
Description
Use dhcp relay server-group to specify a DHCP server for a DHCP server group.