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That option concerns Martian-prefix handling. IS-IS TLVs carry extensible protocol information rather than being ordinary IPv4 header options.

Use supported wide IS-IS metrics to reflect link cost and network design at the correct level is relevant to the different engineering topic "IS-IS wide metrics", but it is not the most directly supported technical design or decision for this precise case: A segment-routing-capability audit requires checking advertised node attributes. the best answer here is: Interpret IS-IS TLVs as typed data for advertised topology, protocol reachability and capabilities.

Plan Level-1 area-local adjacency versus Level-2 interarea transit correctly is relevant to the different engineering topic "IS-IS Level-1/Level-2 reachability", but it is not the most directly supported technical design or decision for this precise case: A segment-routing-capability audit requires checking advertised node attributes. the best answer here is: Interpret IS-IS TLVs as typed data for advertised topology, protocol reachability and capabilities.

That option concerns BGP peer-group policy inheritance. IS-IS TLVs carry extensible protocol information rather than being ordinary IPv4 header options.

Inspect LSP sequence, remaining lifetime and refresh state is relevant to the different engineering topic "IS-IS link-state database", but it is not the most directly supported implementation and troubleshooting step for this precise case: A segment-routing-capability audit requires checking advertised node attributes. the best answer here is: Inspect supported capability TLVs in neighbor LSPs.

Configure suitable Level-1-only behavior for the agreed design is relevant to the different engineering topic "IS-IS Level-1/Level-2 reachability", but it is not the most directly supported implementation and troubleshooting step for this precise case: A segment-routing-capability audit requires checking advertised node attributes. the best answer here is: Inspect supported capability TLVs in neighbor LSPs.

That option concerns IS-IS hello adjacency negotiation. IS-IS TLVs carry extensible protocol information rather than being ordinary IPv4 header options.

The router establishes the intended adjacency and is represented correctly in the topology is relevant to the different engineering topic "IS-IS NET addressing", but it is not the most directly supported operational verification evidence for this precise case: A segment-routing-capability audit requires checking advertised node attributes. the best answer here is: Only actual advertised capability is reported, without assuming universal feature support.

That option concerns Loop protection when BPDUs vanish. IS-IS TLVs carry extensible protocol information rather than being ordinary IPv4 header options.

That option concerns IS-IS link-state database. On a LAN, the DIS creates a pseudonode representation of the segment, unlike an OSPF backup DR design.

That option concerns LDP-IGP synchronization. On a LAN, the DIS creates a pseudonode representation of the segment, unlike an OSPF backup DR design.

Check IS-IS IIH hello compatibility and supported level settings when neighbors fail is relevant to the different engineering topic "IS-IS hello adjacency negotiation", but it is not the most directly supported technical design or decision for this precise case: Three service-provider routers share a broadcast Ethernet transport VLAN. the best answer here is: Understand designated intermediate system election on multi-access IS-IS links.

That option concerns IPv6-over-IPv4 tunnel migration. On a LAN, the DIS creates a pseudonode representation of the segment, unlike an OSPF backup DR design.

That option concerns IS-IS wide metrics. On a LAN, the DIS creates a pseudonode representation of the segment, unlike an OSPF backup DR design.

Confirm matching authentication parameters without exposing secret material is relevant to the different engineering topic "IS-IS authentication checks", but it is not the most directly supported implementation and troubleshooting step for this precise case: Three service-provider routers share a broadcast Ethernet transport VLAN. the best answer here is: Inspect which router is the DIS for the relevant level.

The intended adjacency restores while authentication stays enforced is relevant to the different engineering topic "IS-IS authentication checks", but it is not the most directly supported operational verification evidence for this precise case: Three service-provider routers share a broadcast Ethernet transport VLAN. the best answer here is: The chosen DIS advertises pseudonode information for the LAN.

That option concerns IS-IS TLV reachability advertisements. On a LAN, the DIS creates a pseudonode representation of the segment, unlike an OSPF backup DR design.

That option concerns Nonstop bridging during RE switchover. On a LAN, the DIS creates a pseudonode representation of the segment, unlike an OSPF backup DR design.

Match IS-IS authentication configuration on participating interfaces and levels is relevant to the different engineering topic "IS-IS authentication checks", but it is not the most directly supported technical design or decision for this precise case: A higher-priority IS-IS router becomes the LAN DIS after its interface comes online. the best answer here is: Understand designated intermediate system election on multi-access IS-IS links.

That option concerns SR-MPLS shortest-path transport. On a LAN, the DIS creates a pseudonode representation of the segment, unlike an OSPF backup DR design.

That option concerns IS-IS overload bit maintenance. On a LAN, the DIS creates a pseudonode representation of the segment, unlike an OSPF backup DR design.

That option concerns IS-IS NET addressing. On a LAN, the DIS creates a pseudonode representation of the segment, unlike an OSPF backup DR design.

Configure suitable Level-1-only behavior for the agreed design is relevant to the different engineering topic "IS-IS Level-1/Level-2 reachability", but it is not the most directly supported implementation and troubleshooting step for this precise case: A higher-priority IS-IS router becomes the LAN DIS after its interface comes online. the best answer here is: Observe the new DIS election and LSP convergence.

That option concerns Aggregate-route contributor activation. On a LAN, the DIS creates a pseudonode representation of the segment, unlike an OSPF backup DR design.

Hello PDUs are exchanged and adjacency reaches Up is relevant to the different engineering topic "IS-IS hello adjacency negotiation", but it is not the most directly supported operational verification evidence for this precise case: A higher-priority IS-IS router becomes the LAN DIS after its interface comes online. the best answer here is: The pseudonode reflects the selected DIS after the topology stabilizes.

That option concerns IPv6 link-local next-hop scope. On a LAN, the DIS creates a pseudonode representation of the segment, unlike an OSPF backup DR design.

Its routing remains area-local without an unintended Level-2 transit role is relevant to the different engineering topic "IS-IS Level-1/Level-2 reachability", but it is not the most directly supported operational verification evidence for this precise case: A higher-priority IS-IS router becomes the LAN DIS after its interface comes online. the best answer here is: The pseudonode reflects the selected DIS after the topology stabilizes.

Apply controlled route advertisement between Level-1 and Level-2 areas instead of relying on blanket reachability is relevant to the different engineering topic "IS-IS leaking between levels", but it is not the most directly supported technical design or decision for this precise case: An operator wants higher preference for an uncongested link in the IS-IS core. the best answer here is: Use supported wide IS-IS metrics to reflect link cost and network design at the correct level.

That option concerns BFD rapid failure detection. Wide-metric style provides extended cost support; route selection depends on SPF link costs.

Check IS-IS IIH hello compatibility and supported level settings when neighbors fail is relevant to the different engineering topic "IS-IS hello adjacency negotiation", but it is not the most directly supported technical design or decision for this precise case: An operator wants higher preference for an uncongested link in the IS-IS core. the best answer here is: Use supported wide IS-IS metrics to reflect link cost and network design at the correct level.

That option concerns IS-IS LAN DIS election. Wide-metric style provides extended cost support; route selection depends on SPF link costs.

That option concerns BGP TCP session and AS negotiation. Wide-metric style provides extended cost support; route selection depends on SPF link costs.

Review hello counters, interface levels, NET area and authentication is relevant to the different engineering topic "IS-IS hello adjacency negotiation", but it is not the most directly supported implementation and troubleshooting step for this precise case: An operator wants higher preference for an uncongested link in the IS-IS core. the best answer here is: Adjust approved IS-IS interface metrics for the correct level.