Which command configures a DHCP client on the WAN interface to obtain an IP address via DHCP?

Which command configures a DHCP client on the WAN interface to obtain an IP address via DHCP?

• A. /ip dhcp-client add interface=wan
• B. /ip dhcp-client set interface=wan
• C. /ip dhcp-client add interface=LAN
• D. /dhcp-client add interface=wan

Answer: (A)

To obtain an IP address on the WAN via DHCP, you must start a DHCP client on the WAN interface. The correct command is to create a new DHCP client instance bound to that interface: /ip dhcp-client add interface=wan. This starts the DHCP negotiation on the WAN side so the router can request an address from the upstream DHCP server. Using add creates a new DHCP client. Using set would only adjust an existing client, which isn’t appropriate if none exists yet. Configuring on the LAN interface would place the DHCP client on the internal network, not the Internet-facing WAN, which is not what you want for upstream addressing. The path /dhcp-client add isn’t valid syntactically in RouterOS; the correct path is /ip dhcp-client add. After applying this, you can verify the assigned IP with commands like /ip address and /ip dhcp-client print.

To obtain an IP address on the WAN via DHCP, you must start a DHCP client on the WAN interface. The correct command is to create a new DHCP client instance bound to that interface: /ip dhcp-client add interface=wan. This starts the DHCP negotiation on the WAN side so the router can request an address from the upstream DHCP server.

Using add creates a new DHCP client. Using set would only adjust an existing client, which isn’t appropriate if none exists yet. Configuring on the LAN interface would place the DHCP client on the internal network, not the Internet-facing WAN, which is not what you want for upstream addressing. The path /dhcp-client add isn’t valid syntactically in RouterOS; the correct path is /ip dhcp-client add.

After applying this, you can verify the assigned IP with commands like /ip address and /ip dhcp-client print.