# Specify IP addresses for the interfaces (omitted).

<SwitchA> system-view
[SwitchA] dhcp enable
# Add DHCP server 10.1.1.1 into DHCP server group 1.
[SwitchA] dhcp relay server-group 1 ip 10.1.1.1 
# Enable the DHCP relay agent on VLAN-interface 1.
[SwitchA] interface vlan-interface 1
[SwitchA-Vlan-interface1] dhcp select relay
# Correlate VLAN-interface 1 to DHCP server group 1.
[SwitchA-Vlan-interface1] dhcp relay server-select 1 

---

Cause : The DHCP RELAY security table can become corrupt with multiple entries for the same IP address.

Fix : Upgrade the switch software as follows:

Switch 4800G: Version 5.20.R2202P15 or later

Switch 5800: Version 5.20.R1109

<4800G>system-view 
[4800G] dhcp enable 
[4800G] dhcp relay server-group ip 
[4800G] interface vlan 
[4800G-vlan-interfaceN] dhcp relay server-select You need to configure the DHCP Relay 
on each interface VLAN that you want to use the DHCP server. Regards This message was
edited by Fred_Mancen on 10-8-09 @ 10:58