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This concern applies to NSR control-plane failover in a different scenario where operators need to preserve routing protocol state across a supported redundant control processor switchover. For the deployed link aggregation member continuity approach, the relevant caution is instead that a surviving member may not provide the original aggregate capacity.

This concern applies to BGP prefix filtering in a different scenario where operators need to stop a customer's accidental broad route advertisement at the provider ingress. For the deployed link aggregation member continuity approach, the relevant caution is instead that a surviving member may not provide the original aggregate capacity.

This concern applies to BGP neighbor TCP authentication in a different scenario where operators need to ensure an external BGP session establishes only with peers possessing the agreed session authentication material. For the deployed link aggregation member continuity approach, the relevant caution is instead that a surviving member may not provide the original aggregate capacity.

LDP label binding verification instead addresses a different condition: check the label binding for a specific IGP destination before enabling a VPN. It would instead require you to inspect local and remote LDP bindings and installed labeled forwarding entries, not the stated goal to form LDP adjacency on a provider core link carrying labeled traffic.

node prefix SID forwarding instead addresses a different condition: steer a segment-routed packet to a particular node along its IGP shortest path. It would instead require you to use the node's advertised prefix SID in the appropriate segment list, not the stated goal to form LDP adjacency on a provider core link carrying labeled traffic.

SR OAM path verification instead addresses a different condition: confirm that an SR policy actually follows an intended programmed forwarding path. It would instead require you to run supported segment-routing OAM or policy traceroute verification, not the stated goal to form LDP adjacency on a provider core link carrying labeled traffic.

The proposed step is for LDP label binding verification, whose purpose is to check the label binding for a specific IGP destination before enabling a VPN. It would not perform the necessary LDP directly connected hello discovery operation: enable compatible LDP link discovery on both facing interfaces.

The proposed step is for node prefix SID forwarding, whose purpose is to steer a segment-routed packet to a particular node along its IGP shortest path. It would not perform the necessary LDP directly connected hello discovery operation: enable compatible LDP link discovery on both facing interfaces.

The proposed step is for SR OAM path verification, whose purpose is to confirm that an SR policy actually follows an intended programmed forwarding path. It would not perform the necessary LDP directly connected hello discovery operation: enable compatible LDP link discovery on both facing interfaces.

The observation would verify LDP label binding verification under the separate requirement to check the label binding for a specific IGP destination before enabling a VPN. It does not demonstrate the needed LDP directly connected hello discovery result: peer discovery identifies both LSRs and the LDP session reaches operational state.

The observation would verify node prefix SID forwarding under the separate requirement to steer a segment-routed packet to a particular node along its IGP shortest path. It does not demonstrate the needed LDP directly connected hello discovery result: peer discovery identifies both LSRs and the LDP session reaches operational state.

The observation would verify SR OAM path verification under the separate requirement to confirm that an SR policy actually follows an intended programmed forwarding path. It does not demonstrate the needed LDP directly connected hello discovery result: peer discovery identifies both LSRs and the LDP session reaches operational state.

This defect belongs to LDP label binding verification, where the affected outcome is to check the label binding for a specific IGP destination before enabling a VPN. It is not the direct failure mode identified for the LDP directly connected hello discovery design in this case: IP routing works but LDP hellos are absent on the transport interface.

This defect belongs to node prefix SID forwarding, where the affected outcome is to steer a segment-routed packet to a particular node along its IGP shortest path. It is not the direct failure mode identified for the LDP directly connected hello discovery design in this case: IP routing works but LDP hellos are absent on the transport interface.

This defect belongs to SR OAM path verification, where the affected outcome is to confirm that an SR policy actually follows an intended programmed forwarding path. It is not the direct failure mode identified for the LDP directly connected hello discovery design in this case: IP routing works but LDP hellos are absent on the transport interface.

This concern applies to LDP label binding verification in a different scenario where operators need to check the label binding for a specific IGP destination before enabling a VPN. For the deployed LDP directly connected hello discovery approach, the relevant caution is instead that label distribution depends on working IGP reachability for mapped prefixes.

This concern applies to node prefix SID forwarding in a different scenario where operators need to steer a segment-routed packet to a particular node along its IGP shortest path. For the deployed LDP directly connected hello discovery approach, the relevant caution is instead that label distribution depends on working IGP reachability for mapped prefixes.

This concern applies to SR OAM path verification in a different scenario where operators need to confirm that an SR policy actually follows an intended programmed forwarding path. For the deployed LDP directly connected hello discovery approach, the relevant caution is instead that label distribution depends on working IGP reachability for mapped prefixes.

LDP directly connected hello discovery instead addresses a different condition: form LDP adjacency on a provider core link carrying labeled traffic. It would instead require you to enable compatible LDP link discovery on both facing interfaces, not the stated goal to maintain a directed label-distribution peer not connected by a single Ethernet hop.

DS-TE class type allocation instead addresses a different condition: reserve traffic engineering resources separately for differentiated service classes. It would instead require you to apply the intended DS-TE bandwidth constraint model and class-type reservations, not the stated goal to maintain a directed label-distribution peer not connected by a single Ethernet hop.

TI-LFA link repair instead addresses a different condition: protect an SR transport link using a loop-free post-convergence backup. It would instead require you to enable supported topology-independent LFA protection in the IGP, not the stated goal to maintain a directed label-distribution peer not connected by a single Ethernet hop.

The proposed step is for LDP directly connected hello discovery, whose purpose is to form LDP adjacency on a provider core link carrying labeled traffic. It would not perform the necessary targeted LDP session operation: configure the appropriate targeted LDP discovery and session authentication.

The proposed step is for DS-TE class type allocation, whose purpose is to reserve traffic engineering resources separately for differentiated service classes. It would not perform the necessary targeted LDP session operation: configure the appropriate targeted LDP discovery and session authentication.

The proposed step is for TI-LFA link repair, whose purpose is to protect an SR transport link using a loop-free post-convergence backup. It would not perform the necessary targeted LDP session operation: configure the appropriate targeted LDP discovery and session authentication.

The observation would verify LDP directly connected hello discovery under the separate requirement to form LDP adjacency on a provider core link carrying labeled traffic. It does not demonstrate the needed targeted LDP session result: the targeted LDP neighbor establishes across the routed transport path.

The observation would verify DS-TE class type allocation under the separate requirement to reserve traffic engineering resources separately for differentiated service classes. It does not demonstrate the needed targeted LDP session result: the targeted LDP neighbor establishes across the routed transport path.

The observation would verify TI-LFA link repair under the separate requirement to protect an SR transport link using a loop-free post-convergence backup. It does not demonstrate the needed targeted LDP session result: the targeted LDP neighbor establishes across the routed transport path.

This defect belongs to LDP directly connected hello discovery, where the affected outcome is to form LDP adjacency on a provider core link carrying labeled traffic. It is not the direct failure mode identified for the targeted LDP session design in this case: link-only discovery is expected to discover a nonadjacent peer automatically.

This defect belongs to DS-TE class type allocation, where the affected outcome is to reserve traffic engineering resources separately for differentiated service classes. It is not the direct failure mode identified for the targeted LDP session design in this case: link-only discovery is expected to discover a nonadjacent peer automatically.

This defect belongs to TI-LFA link repair, where the affected outcome is to protect an SR transport link using a loop-free post-convergence backup. It is not the direct failure mode identified for the targeted LDP session design in this case: link-only discovery is expected to discover a nonadjacent peer automatically.

This concern applies to LDP directly connected hello discovery in a different scenario where operators need to form LDP adjacency on a provider core link carrying labeled traffic. For the deployed targeted LDP session approach, the relevant caution is instead that remote LDP signaling still needs end-to-end IP reachability.

This concern applies to DS-TE class type allocation in a different scenario where operators need to reserve traffic engineering resources separately for differentiated service classes. For the deployed targeted LDP session approach, the relevant caution is instead that remote LDP signaling still needs end-to-end IP reachability.

This concern applies to TI-LFA link repair in a different scenario where operators need to protect an SR transport link using a loop-free post-convergence backup. For the deployed targeted LDP session approach, the relevant caution is instead that remote LDP signaling still needs end-to-end IP reachability.