Exam Bundle

That observation verifies eigrp dmvpn peer issue in a different situation, such as when dMVPN peers have protected tunnel reachability but EIGRP never forms because routing is not active on tunnel interfaces. For the reported dmvpn mgre hub incident at a remote clinic network in Melbourne, the required acceptance evidence is: Multiple distinct spokes register and forward over the single multipoint hub tunnel. This other result does not test that condition directly.

That observation verifies dmvpn tunnel key inconsistency in a different situation, such as when gRE-encapsulated packets are rejected because the DMVPN endpoints use incompatible tunnel key settings. For the reported dmvpn mgre hub incident at a remote clinic network in Melbourne, the required acceptance evidence is: Multiple distinct spokes register and forward over the single multipoint hub tunnel. This other result does not test that condition directly.

That observation verifies nhrp cache verification in a different situation, such as when a direct spoke route exists but its tunnel next hop lacks a corresponding NHRP resolution entry. For the reported dmvpn mgre hub incident at a remote clinic network in Melbourne, the required acceptance evidence is: Multiple distinct spokes register and forward over the single multipoint hub tunnel. This other result does not test that condition directly.

That approach is relevant to feasibility condition, such as when the topology table shows an alternate route whose reported distance exceeds the successor feasible distance, but an engineer calls it a guaranteed feasible successor. That is a different root cause from the eigrp delay/bandwidth metric fault observed at an enterprise WAN hub in Singapore. Applying that approach alone would not establish the required result: EIGRP topology metrics and successor selection agree with the desired link characteristics.

That approach is relevant to eigrp named mode af-interface, such as when a named EIGRP configuration has the correct AS but an interface is not participating in its address family. That is a different root cause from the eigrp delay/bandwidth metric fault observed at an enterprise WAN hub in Singapore. Applying that approach alone would not establish the required result: EIGRP topology metrics and successor selection agree with the desired link characteristics.

That approach is relevant to eigrp k-value disagreement, such as when eIGRP hello packets arrive but routers refuse adjacency because composite-metric K values do not agree. That is a different root cause from the eigrp delay/bandwidth metric fault observed at an enterprise WAN hub in Singapore. Applying that approach alone would not establish the required result: EIGRP topology metrics and successor selection agree with the desired link characteristics.

That observation verifies eigrp asn mismatch in a different situation, such as when directly connected routers exchange IP packets but EIGRP neighborship never forms because their autonomous-system numbers differ. For the reported eigrp delay/bandwidth metric incident at an enterprise WAN hub in Singapore, the required acceptance evidence is: EIGRP topology metrics and successor selection agree with the desired link characteristics. This other result does not test that condition directly.

That observation verifies eigrp k-value disagreement in a different situation, such as when eIGRP hello packets arrive but routers refuse adjacency because composite-metric K values do not agree. For the reported eigrp delay/bandwidth metric incident at an enterprise WAN hub in Singapore, the required acceptance evidence is: EIGRP topology metrics and successor selection agree with the desired link characteristics. This other result does not test that condition directly.

That observation verifies eigrp authentication key in a different situation, such as when two routers see EIGRP hellos but never form neighbors after authentication was enabled with mismatched key configurations. For the reported eigrp delay/bandwidth metric incident at an enterprise WAN hub in Singapore, the required acceptance evidence is: EIGRP topology metrics and successor selection agree with the desired link characteristics. This other result does not test that condition directly.

That approach is relevant to vty access-class management acl, such as when untrusted subnets can open the router's SSH port even though the routing interfaces have unrelated ACLs. That is a different root cause from the https management instead of http fault observed at a city service network in Singapore. Applying that approach alone would not establish the required result: Web management uses TLS and ordinary HTTP is unavailable or redirected according to approved policy.

That approach is relevant to ssh rsa key prerequisites, such as when a router cannot start the SSH service because it lacks an appropriate host key and required IOS SSH configuration. That is a different root cause from the https management instead of http fault observed at a city service network in Singapore. Applying that approach alone would not establish the required result: Web management uses TLS and ordinary HTTP is unavailable or redirected according to approved policy.

That approach is relevant to ssh source interface routing, such as when management SSH works from one site but not another because replies leave through an unintended VRF or source path. That is a different root cause from the https management instead of http fault observed at a city service network in Singapore. Applying that approach alone would not establish the required result: Web management uses TLS and ordinary HTTP is unavailable or redirected according to approved policy.

That observation verifies ssh rsa key prerequisites in a different situation, such as when a router cannot start the SSH service because it lacks an appropriate host key and required IOS SSH configuration. For the reported https management instead of http incident at a city service network in Singapore, the required acceptance evidence is: Web management uses TLS and ordinary HTTP is unavailable or redirected according to approved policy. This other result does not test that condition directly.

That observation verifies vty access-class management acl in a different situation, such as when untrusted subnets can open the router's SSH port even though the routing interfaces have unrelated ACLs. For the reported https management instead of http incident at a city service network in Singapore, the required acceptance evidence is: Web management uses TLS and ordinary HTTP is unavailable or redirected according to approved policy. This other result does not test that condition directly.

That observation verifies ssh source interface routing in a different situation, such as when management SSH works from one site but not another because replies leave through an unintended VRF or source path. For the reported https management instead of http incident at a city service network in Singapore, the required acceptance evidence is: Web management uses TLS and ordinary HTTP is unavailable or redirected according to approved policy. This other result does not test that condition directly.

That approach is relevant to provider core label loss, such as when core IGP routes are stable but the ingress PE has no remote label for the required egress PE FEC. That is a different root cause from the penultimate hop popping fault observed at a fintech private WAN in Mumbai. Applying that approach alone would not establish the required result: The penultimate hop removes the outer label and the egress handles the remaining packet appropriately.

That approach is relevant to label stack for vpn, such as when an MPLS VPN packet arrives with an outer transport label and inner service label; an operator interprets both labels as unrelated IP headers. That is a different root cause from the penultimate hop popping fault observed at a fintech private WAN in Mumbai. Applying that approach alone would not establish the required result: The penultimate hop removes the outer label and the egress handles the remaining packet appropriately.

That approach is relevant to mpls interface activation, such as when an IGP core forwards ordinary IP packets but labeled traffic fails because MPLS forwarding is absent on a core-facing interface. That is a different root cause from the penultimate hop popping fault observed at a fintech private WAN in Mumbai. Applying that approach alone would not establish the required result: The penultimate hop removes the outer label and the egress handles the remaining packet appropriately.

That observation verifies lsp versus ip reachability in a different situation, such as when iCMP works between provider loopbacks but a customer VPN is unreachable; the engineer concludes this proves MPLS label switching works. For the reported penultimate hop popping incident at a fintech private WAN in Mumbai, the required acceptance evidence is: The penultimate hop removes the outer label and the egress handles the remaining packet appropriately. This other result does not test that condition directly.

That observation verifies provider core label loss in a different situation, such as when core IGP routes are stable but the ingress PE has no remote label for the required egress PE FEC. For the reported penultimate hop popping incident at a fintech private WAN in Mumbai, the required acceptance evidence is: The penultimate hop removes the outer label and the egress handles the remaining packet appropriately. This other result does not test that condition directly.

That observation verifies ldp discovery versus adjacency in a different situation, such as when uDP-based LDP link discovery is observed, but the engineer assumes label exchange is healthy without verifying the TCP session. For the reported penultimate hop popping incident at a fintech private WAN in Mumbai, the required acceptance evidence is: The penultimate hop removes the outer label and the egress handles the remaining packet appropriately. This other result does not test that condition directly.

That approach is relevant to eigrp named mode af-interface, such as when a named EIGRP configuration has the correct AS but an interface is not participating in its address family. That is a different root cause from the vrf dynamic routing scope fault observed at a carrier-adjacent enterprise in Tokyo. Applying that approach alone would not establish the required result: Neighbors and learned prefixes populate only the intended VRF routing instance.

That approach is relevant to eigrp variance unequal cost, such as when an EIGRP design wants to load share over qualified unequal-cost loop-free paths but only the single lowest-metric successor is installed. That is a different root cause from the vrf dynamic routing scope fault observed at a carrier-adjacent enterprise in Tokyo. Applying that approach alone would not establish the required result: Neighbors and learned prefixes populate only the intended VRF routing instance.

That approach is relevant to bgp remote as incorrect, such as when a BGP peer sends an OPEN notification and rejects the relationship because the configured remote-as does not match its actual ASN. That is a different root cause from the vrf dynamic routing scope fault observed at a carrier-adjacent enterprise in Tokyo. Applying that approach alone would not establish the required result: Neighbors and learned prefixes populate only the intended VRF routing instance.

That observation verifies bgp address family activation in a different situation, such as when an IPv6 BGP peer is Established for IPv4 but does not exchange IPv6 unicast routes because the IPv6 address family is inactive. For the reported vrf dynamic routing scope incident at a carrier-adjacent enterprise in Tokyo, the required acceptance evidence is: Neighbors and learned prefixes populate only the intended VRF routing instance. This other result does not test that condition directly.

That observation verifies ospf external summarization in a different situation, such as when an ASBR redistributing several adjacent external routes tries to use an ABR area range to summarize them. For the reported vrf dynamic routing scope incident at a carrier-adjacent enterprise in Tokyo, the required acceptance evidence is: Neighbors and learned prefixes populate only the intended VRF routing instance. This other result does not test that condition directly.

That observation verifies eigrp ipv6 address family in a different situation, such as when iPv4 EIGRP is healthy but IPv6 routes are absent because the appropriate IPv6 routing address family was never activated. For the reported vrf dynamic routing scope incident at a carrier-adjacent enterprise in Tokyo, the required acceptance evidence is: Neighbors and learned prefixes populate only the intended VRF routing instance. This other result does not test that condition directly.

That approach is relevant to tacacs secret mismatch, such as when tACACS requests reach the identity server but packets cannot be validated because server and device share different secrets. That is a different root cause from the aaa command authorization fault observed at an e-commerce backbone in Amsterdam. Applying that approach alone would not establish the required result: Approved commands execute while unauthorized commands are rejected and recorded.

That approach is relevant to aaa method list not applied, such as when the intended named login method list exists but VTY access continues to use another authentication path. That is a different root cause from the aaa command authorization fault observed at an e-commerce backbone in Amsterdam. Applying that approach alone would not establish the required result: Approved commands execute while unauthorized commands are rejected and recorded.

That approach is relevant to tacacs+ transport port, such as when a firewall allows RADIUS UDP but TACACS+ management logins still fail because its dedicated transport is blocked. That is a different root cause from the aaa command authorization fault observed at an e-commerce backbone in Amsterdam. Applying that approach alone would not establish the required result: Approved commands execute while unauthorized commands are rejected and recorded.

That observation verifies aaa server unavailable versus reject in a different situation, such as when a router is configured TACACS+ then local, but an explicit reject from the active TACACS+ server is expected to trigger local fallback. For the reported aaa command authorization incident at an e-commerce backbone in Amsterdam, the required acceptance evidence is: Approved commands execute while unauthorized commands are rejected and recorded. This other result does not test that condition directly.

That observation verifies aaa exec authorization in a different situation, such as when users pass login authentication but never receive authorized EXEC access because the required exec authorization method is missing. For the reported aaa command authorization incident at an e-commerce backbone in Amsterdam, the required acceptance evidence is: Approved commands execute while unauthorized commands are rejected and recorded. This other result does not test that condition directly.

That observation verifies aaa lockout recovery in a different situation, such as when an administrator enables centralized-only AAA on a remote router without a validated recovery path and loses administrative access when the WAN fails. For the reported aaa command authorization incident at an e-commerce backbone in Amsterdam, the required acceptance evidence is: Approved commands execute while unauthorized commands are rejected and recorded. This other result does not test that condition directly.