What are two mandatory configuration steps to enable MPLS in an all Cisco networks?

What are two mandatory configuration steps to enable MPLS in an all Cisco networks? (Choose two)

What are two mandatory configuration steps to enable MPLS in an all Cisco networks? (Choose two)

A.
router (config)# mpls

B.
router (config)# ip cef

C.
router (config-if)# mpls ip

D.
router (config-if)# mpls label protocol ldp

Explanation:

ip cef
To enable Cisco Express Forwarding (CEF) on the route processor card, use the ip cef command in global configuration mode.
ipcef [distributed]
mpls ip (interface configuration)
To enable MPLS forwarding of IPv4 packets along normally routed paths for a particular interface, use the mpls ip interface configuration command.
Reference:
http://www.cisco.com/en/US/products/sw/iosswrel/ps1831/products_command_reference_chapter09186a00800



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