This Cisco IOS global configuration command disables DHCP option 82 insertion by DHCP snooping. Without it, switches add option 82 to DHCP messages received on untrusted ports by default. section 13.2.2
Use the command when:
- A DHCP server or relay would otherwise receive a switch-inserted option 82 and drop the message. section 13.2.2
- Multiple switches handle the request; disable insertion on every relevant switch, not only the first switch. section 13.2.2
Disable insertion on both switches
SW2(config)# no ip dhcp snooping information option SW1(config)# no ip dhcp snooping information option With insertion disabled on SW1 and SW2, the client’s DISCOVER reaches R1 unchanged. If R1 is a relay agent, it can insert option 82 before forwarding the request. section 13.2.2
