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Configuring the Switch
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3
• Drop – Discards the Option 82 information in a packet and then floods it to the
entire VLAN.
• DHCP Relay Server – IP addresses of DHCP servers to be used by the switch’s
DHCP relay agent in order of preference. Up to five servers can be specified.
Web – Click System, IP Configuration. Enable the DHCP Relay Option 82 function,
set the Option 82 policy, and specify at least one DHCP server IP address. Click
Apply.
Figure 3-8 DHCP Relay Option 82 Configuration
CLI – This example enables DHCP relay with Option 82, and sets the policy as
replace.
Console(config)#ip dhcp relay server 192.168.1.9 192.168.1.54
Console(config)#ip dhcp relay information option 4-241
Console(config)#ip dhcp relay information policy replace 4-242
Console(config)#exit
Console#show ip dhcp-relay
Status of DHCP relay option82:
Insertion of option82 is Enabled.
DHCP option policy :replace.
DHCP relay-server address 192.168.1.9 192.168.1.54 0.0.0.0 0.0.0.0
0.0.0.0
Console#