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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 SR policy color endpoint steering design in this case: a matching destination exists but no color-and-endpoint candidate policy can resolve.

This defect belongs to IGP LDP synchronization, where the affected outcome is to avoid forwarding traffic onto a link before necessary MPLS labels are usable. It is not the direct failure mode identified for the SR policy color endpoint steering design in this case: a matching destination exists but no color-and-endpoint candidate policy can resolve.

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 SR policy color endpoint steering design in this case: a matching destination exists but no color-and-endpoint candidate policy can resolve.

SR policy candidate preference instead addresses a different condition: select the desired segment-routing policy candidate path among valid alternatives. It would instead require you to set a coherent SR policy candidate path preference order, not the stated goal to compute alternate low-latency IGP paths based on measured delay instead of ordinary cost.

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 compute alternate low-latency IGP paths based on measured delay instead of ordinary cost.

RSVP TE explicit path instead addresses a different condition: steer an MPLS TE tunnel over selected intermediate nodes rather than only IGP shortest path. It would instead require you to configure an RSVP-TE tunnel with a suitable explicit-route object, not the stated goal to compute alternate low-latency IGP paths based on measured delay instead of ordinary cost.

The proposed step is for SR policy candidate preference, whose purpose is to select the desired segment-routing policy candidate path among valid alternatives. It would not perform the necessary Flex Algorithm delay metric operation: configure Flex Algorithm metric type and publish delay information on eligible links.

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 Flex Algorithm delay metric operation: configure Flex Algorithm metric type and publish delay information on eligible links.

The proposed step is for RSVP TE explicit path, whose purpose is to steer an MPLS TE tunnel over selected intermediate nodes rather than only IGP shortest path. It would not perform the necessary Flex Algorithm delay metric operation: configure Flex Algorithm metric type and publish delay information on eligible links.

The observation would verify SR policy candidate preference under the separate requirement to select the desired segment-routing policy candidate path among valid alternatives. It does not demonstrate the needed Flex Algorithm delay metric result: algorithm-specific paths prefer the defined low-delay eligible topology.

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 Flex Algorithm delay metric result: algorithm-specific paths prefer the defined low-delay eligible topology.

The observation would verify RSVP TE explicit path under the separate requirement to steer an MPLS TE tunnel over selected intermediate nodes rather than only IGP shortest path. It does not demonstrate the needed Flex Algorithm delay metric result: algorithm-specific paths prefer the defined low-delay eligible topology.

This defect belongs to SR policy candidate preference, where the affected outcome is to select the desired segment-routing policy candidate path among valid alternatives. It is not the direct failure mode identified for the Flex Algorithm delay metric design in this case: the default SPF cost is changed while low-latency algorithm data are absent.

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 Flex Algorithm delay metric design in this case: the default SPF cost is changed while low-latency algorithm data are absent.

This defect belongs to RSVP TE explicit path, where the affected outcome is to steer an MPLS TE tunnel over selected intermediate nodes rather than only IGP shortest path. It is not the direct failure mode identified for the Flex Algorithm delay metric design in this case: the default SPF cost is changed while low-latency algorithm data are absent.

SR transit MTU planning instead addresses a different condition: avoid oversized packets after adding segment routing headers or labels. It would instead require you to account for MPLS label or SRv6 encapsulation overhead in transport MTU design, not the stated goal to exclude links carrying a forbidden administrative affinity from one SR shortest-path computation.

MPLS label forwarding fault isolation instead addresses a different condition: localize loss along a labeled transport LSP rather than at a customer application. It would instead require you to use MPLS OAM echo or traceroute along the intended forwarding equivalence class, not the stated goal to exclude links carrying a forbidden administrative affinity from one SR shortest-path computation.

RSVP bandwidth reservation instead addresses a different condition: reserve a bounded amount of link bandwidth for an MPLS TE LSP. It would instead require you to signal the required bandwidth and use correct TE admission information, not the stated goal to exclude links carrying a forbidden administrative affinity from one SR shortest-path computation.

The proposed step is for SR transit MTU planning, whose purpose is to avoid oversized packets after adding segment routing headers or labels. It would not perform the necessary Flex Algorithm affinity exclusion operation: define the Flex Algorithm affinity constraint consistently on participants.

The proposed step is for MPLS label forwarding fault isolation, whose purpose is to localize loss along a labeled transport LSP rather than at a customer application. It would not perform the necessary Flex Algorithm affinity exclusion operation: define the Flex Algorithm affinity constraint consistently on participants.

The proposed step is for RSVP bandwidth reservation, whose purpose is to reserve a bounded amount of link bandwidth for an MPLS TE LSP. It would not perform the necessary Flex Algorithm affinity exclusion operation: define the Flex Algorithm affinity constraint consistently on participants.

The observation would verify SR transit MTU planning under the separate requirement to avoid oversized packets after adding segment routing headers or labels. It does not demonstrate the needed Flex Algorithm affinity exclusion result: computed Flex Algorithm routes exclude every link with the prohibited attribute.

The observation would verify MPLS label forwarding fault isolation under the separate requirement to localize loss along a labeled transport LSP rather than at a customer application. It does not demonstrate the needed Flex Algorithm affinity exclusion result: computed Flex Algorithm routes exclude every link with the prohibited attribute.

The observation would verify RSVP bandwidth reservation under the separate requirement to reserve a bounded amount of link bandwidth for an MPLS TE LSP. It does not demonstrate the needed Flex Algorithm affinity exclusion result: computed Flex Algorithm routes exclude every link with the prohibited attribute.

This defect belongs to SR transit MTU planning, where the affected outcome is to avoid oversized packets after adding segment routing headers or labels. It is not the direct failure mode identified for the Flex Algorithm affinity exclusion design in this case: default Algorithm 0 ignores the required constrained topology.

This defect belongs to MPLS label forwarding fault isolation, where the affected outcome is to localize loss along a labeled transport LSP rather than at a customer application. It is not the direct failure mode identified for the Flex Algorithm affinity exclusion design in this case: default Algorithm 0 ignores the required constrained topology.

This defect belongs to RSVP bandwidth reservation, where the affected outcome is to reserve a bounded amount of link bandwidth for an MPLS TE LSP. It is not the direct failure mode identified for the Flex Algorithm affinity exclusion design in this case: default Algorithm 0 ignores the required constrained topology.

SR label stack capacity instead addresses a different condition: validate forwarding hardware can impose all required MPLS labels for an SR policy. It would instead require you to limit the SID stack to the platform-supported maximum or use policy simplification, not the stated goal to separate a low-delay service routing intent from the normal algorithm-zero locator.

LDP hello discovery timer resilience instead addresses a different condition: keep an LDP link adjacency stable through brief congestion without hiding real forwarding loss. It would instead require you to coordinate supported LDP hello interval and discovery holdtime settings on both core neighbors, not the stated goal to separate a low-delay service routing intent from the normal algorithm-zero locator.

CBTS tunnel service assignment instead addresses a different condition: steer traffic classes over traffic-engineered tunnels according to service treatment. It would instead require you to classify flows and apply class-based tunnel selection for the supported forwarding policy, not the stated goal to separate a low-delay service routing intent from the normal algorithm-zero locator.

The proposed step is for SR label stack capacity, whose purpose is to validate forwarding hardware can impose all required MPLS labels for an SR policy. It would not perform the necessary SRv6 locator algorithm 128 operation: assign an SRv6 locator to Flexible Algorithm 128 with compatible IGP configuration.

The proposed step is for LDP hello discovery timer resilience, whose purpose is to keep an LDP link adjacency stable through brief congestion without hiding real forwarding loss. It would not perform the necessary SRv6 locator algorithm 128 operation: assign an SRv6 locator to Flexible Algorithm 128 with compatible IGP configuration.

The proposed step is for CBTS tunnel service assignment, whose purpose is to steer traffic classes over traffic-engineered tunnels according to service treatment. It would not perform the necessary SRv6 locator algorithm 128 operation: assign an SRv6 locator to Flexible Algorithm 128 with compatible IGP configuration.