The network team must implement MPLS LDP session protection with two requirements: * Session protection is provided for core loopback IP addresses only. * The LDP session must remain operational for one hour when the WAN link on PE-XR1 fails. Which configuration must the team implement on PE-XR1?

By | December 1, 2022

Refer to the exhibit. The network team must implement MPLS LDP session protection with two requirements:
* Session protection is provided for core loopback IP addresses only.
* The LDP session must remain operational for one hour when the WAN link on PE-XR1 fails.
Which configuration must the team implement on PE-XR1?

  • A. configure terminal ipv4 access-list LDP-SESSION-PROTECTION permit ipv4 172.31.255.0 0.0.0.255 any ! mpls ldp session protection for LDP-SESSION-PROTECTION duration 60 end
  • B. configure terminal ipv4 access-list LDP-SESSION-PROTECTION permit ipv4 172.31.255.0 0.0.0.255 any ! mpls ldp session protection for LDP-SESSION-PROTECTION duration 3600 end
  • C. configure terminal ipv4 access-list LDP-SESSION-PROTECTION permit ipv4 172.31.255.0 0.0.0.255 any permit ipv4 10.0.0.0 0.0.255.255 any ! mpls ldp session protection for LDP-SESSION-PROTECTION duration 60 end
  • D. configure terminal ipv4 access-list LDP-SESSION-PROTECTION permit ipv4 172.31.255.0 0.0.0.255 any permit ipv4 10.0.0.0 0.0.255.255 any ! mpls ldp session protection for LDP-SESSION-PROTECTION duration 3600 end
Answer: Option B.
Explanation: 

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