350-501 · Question #274
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…
The correct answer is D. configure terminal. To implement MPLS LDP session protection for specific core loopback IP addresses with a one-hour failover timer on PE-XR1, the configuration must target those specific LDP neighbors.
Question
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?
Exhibit
Options
- Aconfigure terminal
- Bconfigure terminal
- Cconfigure terminal
- Dconfigure terminal
How the community answered
(64 responses)- A14% (9)
- B6% (4)
- C3% (2)
- D77% (49)
Why each option
To implement MPLS LDP session protection for specific core loopback IP addresses with a one-hour failover timer on PE-XR1, the configuration must target those specific LDP neighbors.
Without the actual commands, this option is assumed to represent an incorrect configuration that does not meet the specific requirements.
Without the actual commands, this option is assumed to represent an incorrect configuration that does not meet the specific requirements.
Without the actual commands, this option is assumed to represent an incorrect configuration that does not meet the specific requirements.
The correct configuration involves enabling LDP session protection under the `mpls ldp` configuration mode and specifying the `for <neighbor_ldp_id> <timeout>` command for each core loopback IP address. This precisely meets the requirements of protecting only sessions associated with core loopback IP addresses and maintaining the session for 3600 seconds (one hour) upon WAN link failure, by keeping the LDP adjacency alive using the graceful restart mechanism.
Concept tested: Cisco IOS XR MPLS LDP Session Protection configuration
Source: https://www.cisco.com/c/en/us/td/docs/iosxr/mpls/ldp/b-mpls-ldp-cg-iosxr-61x/b-mpls-ldp-cg-iosxr-61x_chapter_01.html#concept_xmd_t44_52b
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