Exam Bundle

That observation verifies vpn service inner label in a different situation, such as when transport labels carry packets to the destination PE but the PE lacks a usable VPN label for the customer's destination context. For the reported pe core versus customer forwarding incident at a fintech private WAN in Mumbai, the required acceptance evidence is: Transit P routers forward labeled packets without needing tenant IPv4 routing entries. This other result does not test that condition directly.

That observation verifies route distinguisher overlapping tenants in a different situation, such as when two customers both advertise 10.10.0.0/16 and the operator assumes ordinary IPv4 BGP can carry them without unique VPN identity. For the reported pe core versus customer forwarding incident at a fintech private WAN in Mumbai, the required acceptance evidence is: Transit P routers forward labeled packets without needing tenant IPv4 routing entries. This other result does not test that condition directly.

That observation verifies vpn connectivity asymmetric in a different situation, such as when customer A can reach B but return traffic fails because the B-site VRF imports routes without exporting its local subnets. For the reported pe core versus customer forwarding incident at a fintech private WAN in Mumbai, the required acceptance evidence is: Transit P routers forward labeled packets without needing tenant IPv4 routing entries. This other result does not test that condition directly.

That approach is relevant to acl applied wrong direction, such as when an extended IPv4 ACL correctly describes unwanted inbound traffic but was attached outbound on the wrong router interface. That is a different root cause from the router control-plane versus interface acl fault observed at a university network edge in Vancouver. Applying that approach alone would not establish the required result: Unauthorized management-plane packets are blocked in the appropriate control-plane policy.

That approach is relevant to acl counter troubleshooting, such as when a new permit rule is blamed for a dropped service even though its hit counter never increases. That is a different root cause from the router control-plane versus interface acl fault observed at a university network edge in Vancouver. Applying that approach alone would not establish the required result: Unauthorized management-plane packets are blocked in the appropriate control-plane policy.

That approach is relevant to tcp established acl meaning, such as when an ACL's established keyword is treated as if it were a stateful firewall that tracks complete TCP connection state. That is a different root cause from the router control-plane versus interface acl fault observed at a university network edge in Vancouver. Applying that approach alone would not establish the required result: Unauthorized management-plane packets are blocked in the appropriate control-plane policy.

That observation verifies acl implicit deny in a different situation, such as when a router ACL was built with one permit line and unexpectedly blocks all other traffic. For the reported router control-plane versus interface acl incident at a university network edge in Vancouver, the required acceptance evidence is: Unauthorized management-plane packets are blocked in the appropriate control-plane policy. This other result does not test that condition directly.

That observation verifies acl counter troubleshooting in a different situation, such as when a new permit rule is blamed for a dropped service even though its hit counter never increases. For the reported router control-plane versus interface acl incident at a university network edge in Vancouver, the required acceptance evidence is: Unauthorized management-plane packets are blocked in the appropriate control-plane policy. This other result does not test that condition directly.

That observation verifies acl applied wrong direction in a different situation, such as when an extended IPv4 ACL correctly describes unwanted inbound traffic but was attached outbound on the wrong router interface. For the reported router control-plane versus interface acl incident at a university network edge in Vancouver, the required acceptance evidence is: Unauthorized management-plane packets are blocked in the appropriate control-plane policy. This other result does not test that condition directly.

That approach is relevant to ospf stub flag mismatch, such as when an OSPF adjacency fails because one side is configured stub and the other side treats the area as normal. That is a different root cause from the ospf area mismatch fault observed at a distribution company in Oslo. Applying that approach alone would not establish the required result: show ip ospf neighbor reaches the expected state after the area IDs match.

That approach is relevant to ospf backbone connectivity, such as when an ABR connects two nonbackbone areas without an Area 0 backbone path, and interarea advertisements are missing. That is a different root cause from the ospf area mismatch fault observed at a distribution company in Oslo. Applying that approach alone would not establish the required result: show ip ospf neighbor reaches the expected state after the area IDs match.

That approach is relevant to ospf dr bdr network type, such as when a point-to-point link is configured with an OSPF broadcast network type and displays an unnecessary DR election. That is a different root cause from the ospf area mismatch fault observed at a distribution company in Oslo. Applying that approach alone would not establish the required result: show ip ospf neighbor reaches the expected state after the area IDs match.

That observation verifies ospf virtual link transit in a different situation, such as when an attempted virtual link traverses a stub transit area, causing backbone repair to fail. For the reported ospf area mismatch incident at a distribution company in Oslo, the required acceptance evidence is: show ip ospf neighbor reaches the expected state after the area IDs match. This other result does not test that condition directly.

That observation verifies ospf backbone connectivity in a different situation, such as when an ABR connects two nonbackbone areas without an Area 0 backbone path, and interarea advertisements are missing. For the reported ospf area mismatch incident at a distribution company in Oslo, the required acceptance evidence is: show ip ospf neighbor reaches the expected state after the area IDs match. This other result does not test that condition directly.

That observation verifies ospf stub flag mismatch in a different situation, such as when an OSPF adjacency fails because one side is configured stub and the other side treats the area as normal. For the reported ospf area mismatch incident at a distribution company in Oslo, the required acceptance evidence is: show ip ospf neighbor reaches the expected state after the area IDs match. This other result does not test that condition directly.

That approach is relevant to ip sla tracked floating default, such as when a static primary route remains in the RIB after upstream reachability fails because it tracks interface status only. That is a different root cause from the ip sla state versus reachability fault observed at a corporate IT backbone in Chicago. Applying that approach alone would not establish the required result: The tracked object changes according to the selected operational state rather than an unrelated metric assumption.

That approach is relevant to ip sla source interface, such as when an SLA probe reports failure because it leaves from the wrong source address or VRF compared with production application flows. That is a different root cause from the ip sla state versus reachability fault observed at a corporate IT backbone in Chicago. Applying that approach alone would not establish the required result: The tracked object changes according to the selected operational state rather than an unrelated metric assumption.

That approach is relevant to ip sla track debounce, such as when a tracked SLA path flaps briefly and repeatedly changes the preferred route due to momentary packet loss. That is a different root cause from the ip sla state versus reachability fault observed at a corporate IT backbone in Chicago. Applying that approach alone would not establish the required result: The tracked object changes according to the selected operational state rather than an unrelated metric assumption.

That observation verifies ip sla tracked floating default in a different situation, such as when a static primary route remains in the RIB after upstream reachability fails because it tracks interface status only. For the reported ip sla state versus reachability incident at a corporate IT backbone in Chicago, the required acceptance evidence is: The tracked object changes according to the selected operational state rather than an unrelated metric assumption. This other result does not test that condition directly.

That observation verifies ip sla source interface in a different situation, such as when an SLA probe reports failure because it leaves from the wrong source address or VRF compared with production application flows. For the reported ip sla state versus reachability incident at a corporate IT backbone in Chicago, the required acceptance evidence is: The tracked object changes according to the selected operational state rather than an unrelated metric assumption. This other result does not test that condition directly.

That observation verifies ip sla schedule omitted in a different situation, such as when an IP SLA ICMP echo operation has been defined but never executes because its schedule was not activated. For the reported ip sla state versus reachability incident at a corporate IT backbone in Chicago, the required acceptance evidence is: The tracked object changes according to the selected operational state rather than an unrelated metric assumption. This other result does not test that condition directly.

That approach is relevant to urpf strict asymmetric routes, such as when legitimate multihomed source traffic is dropped by strict uRPF because the best reverse path uses another interface. That is a different root cause from the extended acl ports fault observed at a service provider support center in Paris. Applying that approach alone would not establish the required result: The target application flows match their permit entry while other ports remain constrained.

That approach is relevant to urpf loose reachability, such as when loose uRPF is installed on an edge and administrators assume it verifies incoming interface symmetry. That is a different root cause from the extended acl ports fault observed at a service provider support center in Paris. Applying that approach alone would not establish the required result: The target application flows match their permit entry while other ports remain constrained.

That approach is relevant to acl applied wrong direction, such as when an extended IPv4 ACL correctly describes unwanted inbound traffic but was attached outbound on the wrong router interface. That is a different root cause from the extended acl ports fault observed at a service provider support center in Paris. Applying that approach alone would not establish the required result: The target application flows match their permit entry while other ports remain constrained.

That observation verifies urpf strict asymmetric routes in a different situation, such as when legitimate multihomed source traffic is dropped by strict uRPF because the best reverse path uses another interface. For the reported extended acl ports incident at a service provider support center in Paris, the required acceptance evidence is: The target application flows match their permit entry while other ports remain constrained. This other result does not test that condition directly.

That observation verifies acl first-match ordering in a different situation, such as when a broad permit appears before a targeted deny, so traffic to a prohibited TCP port passes. For the reported extended acl ports incident at a service provider support center in Paris, the required acceptance evidence is: The target application flows match their permit entry while other ports remain constrained. This other result does not test that condition directly.

That observation verifies acl counter troubleshooting in a different situation, such as when a new permit rule is blamed for a dropped service even though its hit counter never increases. For the reported extended acl ports incident at a service provider support center in Paris, the required acceptance evidence is: The target application flows match their permit entry while other ports remain constrained. This other result does not test that condition directly.

That approach is relevant to phase 3 nhrp redirect shortcut, such as when a phase 3 DMVPN uses only hub transit even for established spoke-to-spoke flows because redirect and shortcut mechanisms are absent. That is a different root cause from the phase 2 next-hop-self fault observed at an energy services network in Calgary. Applying that approach alone would not establish the required result: Spokes resolve the actual remote spoke next hop and build direct traffic paths.

That approach is relevant to dmvpn nhs omission, such as when a spoke tunnel comes up but never registers with the hub because no Next Hop Server target is configured. That is a different root cause from the phase 2 next-hop-self fault observed at an energy services network in Calgary. Applying that approach alone would not establish the required result: Spokes resolve the actual remote spoke next hop and build direct traffic paths.

That approach is relevant to static hub mapping at spoke, such as when a spoke cannot send initial NHRP requests because it has no mapping from the hub's tunnel address to the reachable NBMA address. That is a different root cause from the phase 2 next-hop-self fault observed at an energy services network in Calgary. Applying that approach alone would not establish the required result: Spokes resolve the actual remote spoke next hop and build direct traffic paths.

That observation verifies dmvpn nhrp network id mismatch in a different situation, such as when the hub and spoke use different NHRP network identifiers despite otherwise consistent tunnel addressing. For the reported phase 2 next-hop-self incident at an energy services network in Calgary, the required acceptance evidence is: Spokes resolve the actual remote spoke next hop and build direct traffic paths. This other result does not test that condition directly.

That observation verifies static hub mapping at spoke in a different situation, such as when a spoke cannot send initial NHRP requests because it has no mapping from the hub's tunnel address to the reachable NBMA address. For the reported phase 2 next-hop-self incident at an energy services network in Calgary, the required acceptance evidence is: Spokes resolve the actual remote spoke next hop and build direct traffic paths. This other result does not test that condition directly.

That observation verifies phase 3 nhrp redirect shortcut in a different situation, such as when a phase 3 DMVPN uses only hub transit even for established spoke-to-spoke flows because redirect and shortcut mechanisms are absent. For the reported phase 2 next-hop-self incident at an energy services network in Calgary, the required acceptance evidence is: Spokes resolve the actual remote spoke next hop and build direct traffic paths. This other result does not test that condition directly.