Refer to the exhibit. Dedicated MPLS Layer 3 services for VRF customer A are configured on the MPLS network for FTP access. OSPF with area 0 configuration is used as the interior routing protocol betw

Question

Exhibit

Options

• AConfigure passive-interface under the Gi0/2 interface on R22.
• BConfigure ip ospf network point-to-point under the Lo0 interface on R33.
• CConfigure network 33.33.10.1 0.0.0.255 area 0 under the OSPF configuration on R33.
• DConfigure ip cef under the global configuration on R22.

• A
  20% (4)
• B
  5% (1)
• C
  10% (2)
• D
  65% (13)

Explanation

The MPLS Layer 3 VPN services depend on Label Distribution Protocol (LDP) for forwarding traffic. The MPLS forwarding table on R1 shows the route to 172.16.192.21/32 uses a pop label action with R22 as the next hop. This indicates that R22 should perform label switching to forward the packet correctly to R33. IP CEF is a prerequisite for MPLS to operate. Without IP CEF, LDP cannot function properly, and label switching will fail. If CEF is disabled on R22, it prevents proper MPLS label forwarding, which causes traffic to drop. Configuring ip cef globally on R22 ensures that MPLS forwarding and LDP label switching work

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