After implementing MPLS protocol for multiple VRFs on a single Cisco device, the engineer notices all VRFS on the router still do not have the LDP session protection feature enabled. Which configuration must the engineer apply to enable the LDP session protection feature for LDP neighbors within each VRF?
A. Configure LDP session protection globally on the device only.
B. Configure LDP session protection within the individual VRFs.
C. Configure LDP session authentication on the device to enable LDP session protection on each VRF automatically.
D. Configure LDP session protection globally on the device and on each neighbor that requires session protection.
A is true.
The default behavior of the mpls ldp session protection command allows MPLS LDP Session Protection for all neighbor sessions. You can issue either the vrf or for keyword to limit the number of neighbor sessions that are protected:
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/mp_ldp/configuration/xe-16-5/mp-ldp-xe-16-5-book/mp-ldp-sessn-prot.html
Based on the syntax for configuring ldp session protection, say B is the answer
mpls ldp session protection [vrf vpn-name] [for acl] [duration {infinite | seconds}]