3Com Switch 8807, Command Reference Manual

Page: 856 / 1099

854 C
HAPTER
47: DHCP C
ONFIGURATION
C
OMMANDS
Example
# Display information about all user address entries that the DHCP server
maintains.
<SW8800> display dhcprelay-security
IP Address MAC Address IP Address Type
2.2.2.2 0005-5d02-f2b2 Static
3.3.3.3 0005-5d02-f2b3 Dynamic
--- 2 dhcp-security item(s) found ---
ip relay address Syntax
ip relay address ip-address
undo ip relay address { ip-address | all }
View
VLAN interface view
Parameter
ip-address : IP address of the DHCP server to which the DHCP packets received by
this VLAN interface are forwarded.
all : Specifies all DHCP servers configured for the VLAN interface to forward DHCP
packets to.
Description
Use the ip relay address command to specify the VLAN interface to operate in
DHCP Relay mode and to specify the DHCP server to which the DHCP packets
received by this VLAN interface are forwarded.
Use the undo ip relay address command to remove the DHCP server configured
for the VLAN interface to forward DHCP packets.
No DHCP server is configured for a VLAN interface by default.
c
CAUTION: The IP address of the intended DHCP server for the Dhcp relay feature
cannot be the IP address of the VLAN interface corresponding to the DHCP Relay.
Otherwise, the system gives the information such as "Error. The DHCP relay
address you entered overlaps with local ip!".
Example
# Specify users belonging to VLAN interface 1 to acquire their IP addresses from a
specified DHCP server.
<SW8800> system-view
System View: return to User View with Ctrl+Z.
Table 111 Description on the fields of the display dhcp-security command
Field Description
IP Address User IP address
MAC Address User MAC address
IP Address Type Type of the user address entry, which can be static or dynamic