H3C Technologies H3C S12500 Series Switches - Manual (Page 80)

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Task Command Remarks
Display Option 82 configuration
information on the DHCP relay agent.
display dhcp relay information { all |
interface interface-type
interface-number } [ | { begin |
exclude | include }
regular-expression ]
Available in any view.
Display information about bindings of
DHCP relay agents.
display dhcp relay security
[ ip-address | dynamic | static ] [ |
{ begin | exclude | include }
regular-expression ]
Available in any view.
Display statistics information about
bindings of DHCP relay agents.
display dhcp relay security statistics
[ | { begin | exclude | include }
regular-expression ]
Available in any view.
Display information about the refreshing
interval for entries of dynamic IP-to-MAC
bindings.
display dhcp relay security tracker [ |
{ begin | exclude | include }
regular-expression ]
Available in any view.
Display information about the
configuration of a specific or all DHCP
server groups. display dhcp relay server-group
{ group-id | all } [ | { begin | exclude
| include } regular-expression ]
Available in any view.
Display packet statistics on relay agent.
display dhcp relay statistics
[ server-group { group-id | all } ] [ |
{ begin | exclude | include }
regular-expression ]
Available in any view.
Clear packet statistics from relay agent.
reset dhcp relay statistics
[ server-group group-id ]
Available in user view.
DHCP relay agent configuration examples
DHCP relay agent configuration example
Network requirements
As shown in Figure 32 , DHCP clients reside on network 10.10.1.0/24. The IP address of DHCP server
(Switch B) is 10.1.1.1/24, and the IP address of DHCP server (Switch C) is 10.2.1.1/24. Because the
DHCP clients reside on a different network with the DHCP servers, a DHCP relay agent is deployed to
forward messages between DHCP clients and the DHCP servers.
VLAN-interface 1 of the DHCP relay agent (Switch A) connects to the subnet where DHCP clients reside.
The IP address of VLAN-interface 1 is 10.10.1.1/24.