Exam Bundle

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 acl logging load incident at a government campus in Canberra, the required acceptance evidence is: Relevant denies remain observable without overwhelming logging resources. This other result does not test that condition directly.

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 acl logging load incident at a government campus in Canberra, the required acceptance evidence is: Relevant denies remain observable without overwhelming logging resources. This other result does not test that condition directly.

That observation verifies extended acl ports in a different situation, such as when an ACL permits a destination address but not the required TCP application port because the entry tests the wrong transport field. For the reported acl logging load incident at a government campus in Canberra, the required acceptance evidence is: Relevant denies remain observable without overwhelming logging resources. This other result does not test that condition directly.

That approach is relevant to ibgp next-hop preservation, such as when a router learns an eBGP route through iBGP but its NEXT_HOP points at an unreachable border address. That is a different root cause from the discard route and summary blackhole fault observed at a cloud interconnect team in Toronto. Applying that approach alone would not establish the required result: The aggregate is advertised only under acceptable reachability policy and packets do not silently blackhole due to stale summarization.

That approach is relevant to route poisoning on withdrawal, such as when a distance-vector neighbor keeps advertising a broken prefix as reachable long after topology failure. That is a different root cause from the discard route and summary blackhole fault observed at a cloud interconnect team in Toronto. Applying that approach alone would not establish the required result: The aggregate is advertised only under acceptable reachability policy and packets do not silently blackhole due to stale summarization.

That approach is relevant to eigrp stub leaf, such as when a remote branch does not transit traffic yet its router receives network-wide EIGRP query requests for unrelated destinations. That is a different root cause from the discard route and summary blackhole fault observed at a cloud interconnect team in Toronto. Applying that approach alone would not establish the required result: The aggregate is advertised only under acceptable reachability policy and packets do not silently blackhole due to stale summarization.

That observation verifies bgp local preference in a different situation, such as when multiple routers inside one AS need a consistent outbound exit preference, but the operator modifies MED on external advertisements instead. For the reported discard route and summary blackhole incident at a cloud interconnect team in Toronto, the required acceptance evidence is: The aggregate is advertised only under acceptable reachability policy and packets do not silently blackhole due to stale summarization. This other result does not test that condition directly.

That observation verifies eigrp stub leaf in a different situation, such as when a remote branch does not transit traffic yet its router receives network-wide EIGRP query requests for unrelated destinations. For the reported discard route and summary blackhole incident at a cloud interconnect team in Toronto, the required acceptance evidence is: The aggregate is advertised only under acceptable reachability policy and packets do not silently blackhole due to stale summarization. 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 discard route and summary blackhole incident at a cloud interconnect team in Toronto, the required acceptance evidence is: The aggregate is advertised only under acceptable reachability policy and packets do not silently blackhole due to stale summarization. This other result does not test that condition directly.

That approach is relevant to snmp polling versus traps, such as when an engineer expects router traps to appear merely because polling UDP 161 is permitted, while outbound notification transport is blocked. That is a different root cause from the assurance telemetry missing fault observed at a city service network in Singapore. Applying that approach alone would not establish the required result: The device begins supplying expected Assurance health and event metrics.

That approach is relevant to catalyst center inventory credentials, such as when catalyst Center discovers a router's IP address but cannot collect configuration and health because management credentials are invalid. That is a different root cause from the assurance telemetry missing fault observed at a city service network in Singapore. Applying that approach alone would not establish the required result: The device begins supplying expected Assurance health and event metrics.

That approach is relevant to streaming telemetry subscription, such as when telemetry measurements stop appearing even though periodic CLI monitoring works because the subscription destination is unreachable. That is a different root cause from the assurance telemetry missing fault observed at a city service network in Singapore. Applying that approach alone would not establish the required result: The device begins supplying expected Assurance health and event metrics.

That observation verifies syslog transport acl in a different situation, such as when local logs are correct but the central UDP syslog collector never sees packets due to the WAN filtering policy. For the reported assurance telemetry missing incident at a city service network in Singapore, the required acceptance evidence is: The device begins supplying expected Assurance health and event metrics. This other result does not test that condition directly.

That observation verifies catalyst center inventory credentials in a different situation, such as when catalyst Center discovers a router's IP address but cannot collect configuration and health because management credentials are invalid. For the reported assurance telemetry missing incident at a city service network in Singapore, the required acceptance evidence is: The device begins supplying expected Assurance health and event metrics. This other result does not test that condition directly.

That observation verifies streaming telemetry subscription in a different situation, such as when telemetry measurements stop appearing even though periodic CLI monitoring works because the subscription destination is unreachable. For the reported assurance telemetry missing incident at a city service network in Singapore, the required acceptance evidence is: The device begins supplying expected Assurance health and event metrics. This other result does not test that condition directly.

That approach is relevant to copp to-router versus transit, such as when a control-plane policy is expected to rate-limit transit traffic between two hosts but does not affect that flow. That is a different root cause from the copp bgp keepalive drop fault observed at a health system WAN in Toronto. Applying that approach alone would not establish the required result: BGP neighbor sessions remain stable and CoPP drop counters for that class decline.

That approach is relevant to copp ospf hello starvation, such as when oSPF adjacencies flap only during bursts because CoPP control-plane policing drops routed protocol hellos. That is a different root cause from the copp bgp keepalive drop fault observed at a health system WAN in Toronto. Applying that approach alone would not establish the required result: BGP neighbor sessions remain stable and CoPP drop counters for that class decline.

That approach is relevant to copp default class, such as when a newly applied CoPP policy unintentionally polices all otherwise-unmatched routing traffic at an extremely low default-class rate. That is a different root cause from the copp bgp keepalive drop fault observed at a health system WAN in Toronto. Applying that approach alone would not establish the required result: BGP neighbor sessions remain stable and CoPP drop counters for that class decline.

That observation verifies copp hardware offload visibility in a different situation, such as when a platform shows low software CoPP counters and the team concludes no packets were dropped despite hardware policing. For the reported copp bgp keepalive drop incident at a health system WAN in Toronto, the required acceptance evidence is: BGP neighbor sessions remain stable and CoPP drop counters for that class decline. This other result does not test that condition directly.

That observation verifies copp snmp polling impact in a different situation, such as when the monitoring station sees SNMP timeouts during busy periods while CoPP exceeded counters increase for the polling class. For the reported copp bgp keepalive drop incident at a health system WAN in Toronto, the required acceptance evidence is: BGP neighbor sessions remain stable and CoPP drop counters for that class decline. This other result does not test that condition directly.

That observation verifies copp ospf hello starvation in a different situation, such as when oSPF adjacencies flap only during bursts because CoPP control-plane policing drops routed protocol hellos. For the reported copp bgp keepalive drop incident at a health system WAN in Toronto, the required acceptance evidence is: BGP neighbor sessions remain stable and CoPP drop counters for that class decline. This other result does not test that condition directly.

That approach is relevant to spoke nhrp registration age, such as when a hub stops forwarding for one spoke because its NHRP registration repeatedly expires. That is a different root cause from the nhrp cache verification fault observed at a logistics hub in Berlin. Applying that approach alone would not establish the required result: The next-hop tunnel address resolves to the expected NBMA endpoint.

That approach is relevant to hub dynamic multicast mappings, such as when a DMVPN hub sees NHRP registrations but no EIGRP neighbors because tunneled multicast control packets cannot reach newly joined spokes. That is a different root cause from the nhrp cache verification fault observed at a logistics hub in Berlin. Applying that approach alone would not establish the required result: The next-hop tunnel address resolves to the expected NBMA endpoint.

That approach is relevant to spoke multicast static mapping, such as when a DMVPN spoke reaches the hub by unicast but its multicast routing hellos never reach the hub tunnel. That is a different root cause from the nhrp cache verification fault observed at a logistics hub in Berlin. Applying that approach alone would not establish the required result: The next-hop tunnel address resolves to the expected NBMA endpoint.

That observation verifies dmvpn wrong tunnel source in a different situation, such as when a spoke's tunnel source points at an inactive LAN interface instead of its reachable WAN underlay interface. For the reported nhrp cache verification incident at a logistics hub in Berlin, the required acceptance evidence is: The next-hop tunnel address resolves to the expected NBMA endpoint. This other result does not test that condition directly.

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 nhrp cache verification incident at a logistics hub in Berlin, the required acceptance evidence is: The next-hop tunnel address resolves to the expected NBMA endpoint. 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 nhrp cache verification incident at a logistics hub in Berlin, the required acceptance evidence is: The next-hop tunnel address resolves to the expected NBMA endpoint. This other result does not test that condition directly.

That approach is relevant to connected route redistribution oversight, such as when an attached transit network is mistakenly redistributed into an IGP intended only to carry service prefixes. That is a different root cause from the ospf default originate conditional fault observed at a manufacturing campus in Austin. Applying that approach alone would not establish the required result: The OSPF external default appears while the qualifying upstream default exists and withdraws when unavailable.

That approach is relevant to bgp network statement exact match, such as when a BGP network statement for a /24 originates nothing because only a /16 exists in the local RIB. That is a different root cause from the ospf default originate conditional fault observed at a manufacturing campus in Austin. Applying that approach alone would not establish the required result: The OSPF external default appears while the qualifying upstream default exists and withdraws when unavailable.

That approach is relevant to eigrp seed metric on redistribution, such as when oSPF routes do not appear in EIGRP after redistribution because no usable seed metric was assigned. That is a different root cause from the ospf default originate conditional fault observed at a manufacturing campus in Austin. Applying that approach alone would not establish the required result: The OSPF external default appears while the qualifying upstream default exists and withdraws when unavailable.

That observation verifies redistribution route-map omission in a different situation, such as when a router leaks sensitive static prefixes into OSPF because redistribute static has no route policy. For the reported ospf default originate conditional incident at a manufacturing campus in Austin, the required acceptance evidence is: The OSPF external default appears while the qualifying upstream default exists and withdraws when unavailable. This other result does not test that condition directly.

That observation verifies ospf e1 versus e2 metric type in a different situation, such as when traffic toward a redistributed external prefix should account for internal path cost, but all paths are evaluated only on the external metric. For the reported ospf default originate conditional incident at a manufacturing campus in Austin, the required acceptance evidence is: The OSPF external default appears while the qualifying upstream default exists and withdraws when unavailable. This other result does not test that condition directly.

That observation verifies ospf external subnets redistribution in a different situation, such as when a redistribution statement is intended to carry multiple classless subnets into OSPF but only classful behavior is observed in the configured IOS context. For the reported ospf default originate conditional incident at a manufacturing campus in Austin, the required acceptance evidence is: The OSPF external default appears while the qualifying upstream default exists and withdraws when unavailable. This other result does not test that condition directly.