| Description |
This article describes how to assign an IP using DHCP option 82 on FortiGate with a Cisco Switch.
Topology: |
| Scope | FortiGate. |
| Solution |
Step 1: Enable DHCP Option 82 on the Switch:
Enable DHCP Snooping Globally:
Switch# configure terminal Switch(config)# ip dhcp snooping
Enable DHCP Snooping on Specific VLANs:
Switch(config)# ip dhcp snooping vlan [VLAN_ID]
Enable Option 82 Insertion:
Switch(config)# ip dhcp snooping information option
Configure Trust Settings:
Switch(config)# interface [interface_id] Switch(config-if)# ip dhcp snooping trust
Verify the Configuration:
Switch# show ip dhcp snooping
Step 2: Run a capture on the FortiGate GUI or CLI to find the circuit ID and remote ID.
Step 3: Configure FortiGate’s Interface:
Step 4: Configure the DHCP server and Option 82 as below:
Type: Option82 IP: Reserved IP address Circuit-id and Remote-id: From the capture above.
Step 5: Check the Pc’s IP config:
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