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This defect belongs to SRv6 locator aggregation, where the affected outcome is to allocate routable prefixes to identify SRv6-capable nodes and behaviors. It is not the direct failure mode identified for the SR static versus dynamic path choice design in this case: an automatically recomputed dynamic path violates the mandated deterministic route.

This defect belongs to MPLS-TE preemption priority, where the affected outcome is to allow higher-priority reservation requests to displace lower-priority capacity commitments. It is not the direct failure mode identified for the SR static versus dynamic path choice design in this case: an automatically recomputed dynamic path violates the mandated deterministic route.

This defect belongs to SRLG diverse recovery, where the affected outcome is to avoid primary and backup TE paths sharing the same underlying fiber risk. It is not the direct failure mode identified for the SR static versus dynamic path choice design in this case: an automatically recomputed dynamic path violates the mandated deterministic route.

EVPN MAC mobility control instead addresses a different condition: maintain forwarding when a customer virtual machine moves between EVPN access PEs. It would instead require you to apply MAC mobility and sequence handling for newly advertised locations, not the stated goal to let a CE use two provider edges without losing its active Ethernet path on one PE failure.

L3VPN label blackhole diagnosis instead addresses a different condition: investigate a VPNv4 route that exists in BGP but does not carry packets end to end. It would instead require you to check transport label and VPN service label resolution from ingress to egress, not the stated goal to let a CE use two provider edges without losing its active Ethernet path on one PE failure.

VRF customer routing isolation instead addresses a different condition: prevent two subscribers with overlapping private addresses from mixing their forwarding routes. It would instead require you to create separate VRFs and bind the correct customer interfaces to each table, not the stated goal to let a CE use two provider edges without losing its active Ethernet path on one PE failure.

The proposed step is for EVPN MAC mobility control, whose purpose is to maintain forwarding when a customer virtual machine moves between EVPN access PEs. It would not perform the necessary EVPN multihomed all-active Ethernet segment operation: configure compatible EVPN Ethernet segment identifiers and all-active multihoming.

The proposed step is for L3VPN label blackhole diagnosis, whose purpose is to investigate a VPNv4 route that exists in BGP but does not carry packets end to end. It would not perform the necessary EVPN multihomed all-active Ethernet segment operation: configure compatible EVPN Ethernet segment identifiers and all-active multihoming.

The proposed step is for VRF customer routing isolation, whose purpose is to prevent two subscribers with overlapping private addresses from mixing their forwarding routes. It would not perform the necessary EVPN multihomed all-active Ethernet segment operation: configure compatible EVPN Ethernet segment identifiers and all-active multihoming.

The observation would verify EVPN MAC mobility control under the separate requirement to maintain forwarding when a customer virtual machine moves between EVPN access PEs. It does not demonstrate the needed EVPN multihomed all-active Ethernet segment result: both PEs advertise eligible Ethernet segment reachability and failover retains service.

The observation would verify L3VPN label blackhole diagnosis under the separate requirement to investigate a VPNv4 route that exists in BGP but does not carry packets end to end. It does not demonstrate the needed EVPN multihomed all-active Ethernet segment result: both PEs advertise eligible Ethernet segment reachability and failover retains service.

The observation would verify VRF customer routing isolation under the separate requirement to prevent two subscribers with overlapping private addresses from mixing their forwarding routes. It does not demonstrate the needed EVPN multihomed all-active Ethernet segment result: both PEs advertise eligible Ethernet segment reachability and failover retains service.

This defect belongs to EVPN MAC mobility control, where the affected outcome is to maintain forwarding when a customer virtual machine moves between EVPN access PEs. It is not the direct failure mode identified for the EVPN multihomed all-active Ethernet segment design in this case: two PEs use conflicting Ethernet segment IDs for the same customer handoff.

This defect belongs to L3VPN label blackhole diagnosis, where the affected outcome is to investigate a VPNv4 route that exists in BGP but does not carry packets end to end. It is not the direct failure mode identified for the EVPN multihomed all-active Ethernet segment design in this case: two PEs use conflicting Ethernet segment IDs for the same customer handoff.

This defect belongs to VRF customer routing isolation, where the affected outcome is to prevent two subscribers with overlapping private addresses from mixing their forwarding routes. It is not the direct failure mode identified for the EVPN multihomed all-active Ethernet segment design in this case: two PEs use conflicting Ethernet segment IDs for the same customer handoff.

This concern applies to EVPN MAC mobility control in a different scenario where operators need to maintain forwarding when a customer virtual machine moves between EVPN access PEs. For the deployed EVPN multihomed all-active Ethernet segment approach, the relevant caution is instead that split-horizon and aliasing behavior must be correct to avoid duplicate forwarding.

This concern applies to L3VPN label blackhole diagnosis in a different scenario where operators need to investigate a VPNv4 route that exists in BGP but does not carry packets end to end. For the deployed EVPN multihomed all-active Ethernet segment approach, the relevant caution is instead that split-horizon and aliasing behavior must be correct to avoid duplicate forwarding.

This concern applies to VRF customer routing isolation in a different scenario where operators need to prevent two subscribers with overlapping private addresses from mixing their forwarding routes. For the deployed EVPN multihomed all-active Ethernet segment approach, the relevant caution is instead that split-horizon and aliasing behavior must be correct to avoid duplicate forwarding.

carrier supporting carrier VPN instead addresses a different condition: let a carrier customer transport its own labeled VPN services over another carrier backbone. It would instead require you to build a supported carrier-supporting-carrier architecture with appropriate labeled route exchange, not the stated goal to make only one provider edge forward traffic for a protected customer Ethernet segment.

controlled Internet breakout instead addresses a different condition: provide Internet access for an L3VPN tenant without leaking private customer prefixes. It would instead require you to place an explicit default-route or shared-services handoff inside the authorized VPN routing design, not the stated goal to make only one provider edge forward traffic for a protected customer Ethernet segment.

shared extranet route import instead addresses a different condition: let only selected tenants reach a common internal service subnet. It would instead require you to create explicit selective route-target import or route-leak policies for the shared service, not the stated goal to make only one provider edge forward traffic for a protected customer Ethernet segment.

The proposed step is for carrier supporting carrier VPN, whose purpose is to let a carrier customer transport its own labeled VPN services over another carrier backbone. It would not perform the necessary EVPN single-active access design operation: configure supported single-active EVPN multihoming and designated-forwarder behavior.

The proposed step is for controlled Internet breakout, whose purpose is to provide Internet access for an L3VPN tenant without leaking private customer prefixes. It would not perform the necessary EVPN single-active access design operation: configure supported single-active EVPN multihoming and designated-forwarder behavior.

The proposed step is for shared extranet route import, whose purpose is to let only selected tenants reach a common internal service subnet. It would not perform the necessary EVPN single-active access design operation: configure supported single-active EVPN multihoming and designated-forwarder behavior.

The observation would verify carrier supporting carrier VPN under the separate requirement to let a carrier customer transport its own labeled VPN services over another carrier backbone. It does not demonstrate the needed EVPN single-active access design result: one active access PE forwards while backup takes over after failover.

The observation would verify controlled Internet breakout under the separate requirement to provide Internet access for an L3VPN tenant without leaking private customer prefixes. It does not demonstrate the needed EVPN single-active access design result: one active access PE forwards while backup takes over after failover.

The observation would verify shared extranet route import under the separate requirement to let only selected tenants reach a common internal service subnet. It does not demonstrate the needed EVPN single-active access design result: one active access PE forwards while backup takes over after failover.

This defect belongs to carrier supporting carrier VPN, where the affected outcome is to let a carrier customer transport its own labeled VPN services over another carrier backbone. It is not the direct failure mode identified for the EVPN single-active access design design in this case: both PEs forward simultaneously despite a single-active customer requirement.

This defect belongs to controlled Internet breakout, where the affected outcome is to provide Internet access for an L3VPN tenant without leaking private customer prefixes. It is not the direct failure mode identified for the EVPN single-active access design design in this case: both PEs forward simultaneously despite a single-active customer requirement.

This defect belongs to shared extranet route import, where the affected outcome is to let only selected tenants reach a common internal service subnet. It is not the direct failure mode identified for the EVPN single-active access design design in this case: both PEs forward simultaneously despite a single-active customer requirement.

This concern applies to carrier supporting carrier VPN in a different scenario where operators need to let a carrier customer transport its own labeled VPN services over another carrier backbone. For the deployed EVPN single-active access design approach, the relevant caution is instead that failover convergence remains limited by Ethernet segment state timing.

This concern applies to controlled Internet breakout in a different scenario where operators need to provide Internet access for an L3VPN tenant without leaking private customer prefixes. For the deployed EVPN single-active access design approach, the relevant caution is instead that failover convergence remains limited by Ethernet segment state timing.

This concern applies to shared extranet route import in a different scenario where operators need to let only selected tenants reach a common internal service subnet. For the deployed EVPN single-active access design approach, the relevant caution is instead that failover convergence remains limited by Ethernet segment state timing.