R3303-HP HSR6800 Routers Layer 3 - IP Services Command Reference

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Views
System view
Default command level
2: System level
Usage guidelines
With this function enabled, upon receiving a DHCP request, the DHCP relay agent records the IP
addresses of all DHCP servers that 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 for recorded DHCP servers is cleared, the relay agent re-records server information
following this mechanism.
Examples
# Enable unauthorized DHCP server detection.
<Sysname> system-view
[Sysname] dhcp relay server-detect
dhcp relay server-group
Use dhcp relay server-group to specify a DHCP server for a DHCP server group.
Use undo dhcp relay server-group to remove a DHCP server from a DHCP server group, if no ip
ip-address is specified, all servers in the DHCP server group and the server group itself are removed.
Syntax
dhcp relay server-group group-id ip ip-address
undo dhcp relay server-group group-id [ ip ip-address ]
Default
No DHCP server is specified for a DHCP server group.
Views
System view
Default command 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.
Usage guidelines
The IP address of a DHCP server and the IP address of the DHCP relay agent's interface that connects the
DHCP client cannot be in the same network segment. Otherwise, the client might fail to obtain an IP
address.
If a server group has been correlated to multiple interfaces, you need to cancel these correlations before
removing the server group.