Exam Bundle

That observation verifies tacacs secret mismatch in a different situation, such as when tACACS requests reach the identity server but packets cannot be validated because server and device share different secrets. For the reported tacacs+ transport port incident at a regional data center in Dallas, the required acceptance evidence is: The router establishes a TCP session to TACACS+ and login requests are answered. This other result does not test that condition directly.

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 tacacs+ transport port incident at a regional data center in Dallas, the required acceptance evidence is: The router establishes a TCP session to TACACS+ and login requests are answered. This other result does not test that condition directly.

That observation verifies aaa login authentication omitted in a different situation, such as when remote access fails after AAA configuration because no supported authentication method list is bound to the relevant VTY lines. For the reported tacacs+ transport port incident at a regional data center in Dallas, the required acceptance evidence is: The router establishes a TCP session to TACACS+ and login requests are answered. This other result does not test that condition directly.

That approach is relevant to route-map sequence numbering, such as when a new permit route-map entry is added after a broad permit any; its more-specific set action never runs. That is a different root cause from the prefix-list exact-length filter fault observed at a managed services backbone in Amsterdam. Applying that approach alone would not establish the required result: Both the approved aggregate and the designated more-specific prefixes meet the configured match conditions.

That approach is relevant to route-map attachment direction, such as when a prefix policy meant to constrain inbound BGP routes is applied only outbound to the peer. That is a different root cause from the prefix-list exact-length filter fault observed at a managed services backbone in Amsterdam. Applying that approach alone would not establish the required result: Both the approved aggregate and the designated more-specific prefixes meet the configured match conditions.

That approach is relevant to longest prefix before ad, such as when a host matches an OSPF /24 and a lower-AD static /16; operations assumes the static summary must forward the packet. That is a different root cause from the prefix-list exact-length filter fault observed at a managed services backbone in Amsterdam. Applying that approach alone would not establish the required result: Both the approved aggregate and the designated more-specific prefixes meet the configured match conditions.

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 prefix-list exact-length filter incident at a managed services backbone in Amsterdam, the required acceptance evidence is: Both the approved aggregate and the designated more-specific prefixes meet the configured match conditions. This other result does not test that condition directly.

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 prefix-list exact-length filter incident at a managed services backbone in Amsterdam, the required acceptance evidence is: Both the approved aggregate and the designated more-specific prefixes meet the configured match conditions. This other result does not test that condition directly.

That observation verifies bgp network statement exact match in a different situation, such as when a BGP network statement for a /24 originates nothing because only a /16 exists in the local RIB. For the reported prefix-list exact-length filter incident at a managed services backbone in Amsterdam, the required acceptance evidence is: Both the approved aggregate and the designated more-specific prefixes meet the configured match conditions. This other result does not test that condition directly.

That approach is relevant to syslog severity threshold, such as when informational interface events never reach syslog because the configured logging trap level captures only severe messages. That is a different root cause from the syslog remote destination fault observed at a corporate IT backbone in Chicago. Applying that approach alone would not establish the required result: The collector receives timestamped router events from the expected device identity.

That approach is relevant to syslog transport acl, such as when local logs are correct but the central UDP syslog collector never sees packets due to the WAN filtering policy. That is a different root cause from the syslog remote destination fault observed at a corporate IT backbone in Chicago. Applying that approach alone would not establish the required result: The collector receives timestamped router events from the expected device identity.

That approach is relevant to log device identifier, such as when a multi-router syslog collector cannot distinguish message origin because all records have the same ambiguous sender name. That is a different root cause from the syslog remote destination fault observed at a corporate IT backbone in Chicago. Applying that approach alone would not establish the required result: The collector receives timestamped router events from the expected device identity.

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 syslog remote destination incident at a corporate IT backbone in Chicago, the required acceptance evidence is: The collector receives timestamped router events from the expected device identity. This other result does not test that condition directly.

That observation verifies log timestamps absent in a different situation, such as when two routers' syslog events cannot be ordered during a reconvergence incident because device log messages have no accurate timestamps. For the reported syslog remote destination incident at a corporate IT backbone in Chicago, the required acceptance evidence is: The collector receives timestamped router events from the expected device identity. 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 syslog remote destination incident at a corporate IT backbone in Chicago, the required acceptance evidence is: The collector receives timestamped router events from the expected device identity. This other result does not test that condition directly.

That approach is relevant to copp ssh throttling, such as when remote SSH login attempts time out because the management class policer is too low for legitimate maintenance bursts. That is a different root cause from the copp ospf hello starvation fault observed at a national retail head office in Sydney. Applying that approach alone would not establish the required result: OSPF hellos reach the process and adjacencies remain stable under expected load.

That approach is relevant to copp bgp keepalive drop, such as when an overly strict CoPP policer drops BGP keepalives and neighbors repeatedly expire their hold timers. That is a different root cause from the copp ospf hello starvation fault observed at a national retail head office in Sydney. Applying that approach alone would not establish the required result: OSPF hellos reach the process and adjacencies remain stable under expected load.

That approach is relevant to copp snmp polling impact, such as when the monitoring station sees SNMP timeouts during busy periods while CoPP exceeded counters increase for the polling class. That is a different root cause from the copp ospf hello starvation fault observed at a national retail head office in Sydney. Applying that approach alone would not establish the required result: OSPF hellos reach the process and adjacencies remain stable under expected load.

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 ospf hello starvation incident at a national retail head office in Sydney, the required acceptance evidence is: OSPF hellos reach the process and adjacencies remain stable under expected load. This other result does not test that condition directly.

That observation verifies copp bgp keepalive drop in a different situation, such as when an overly strict CoPP policer drops BGP keepalives and neighbors repeatedly expire their hold timers. For the reported copp ospf hello starvation incident at a national retail head office in Sydney, the required acceptance evidence is: OSPF hellos reach the process and adjacencies remain stable under expected load. This other result does not test that condition directly.

That observation verifies copp http management in a different situation, such as when hTTPS management packets from authorized administrators are incorrectly classified with untrusted HTTP management probes. For the reported copp ospf hello starvation incident at a national retail head office in Sydney, the required acceptance evidence is: OSPF hellos reach the process and adjacencies remain stable under expected load. This other result does not test that condition directly.

That approach is relevant to tunnel ipsec profile binding, such as when spoke-to-hub GRE packets are being sent without the required encryption because no tunnel protection profile is attached. That is a different root cause from the gre ipsec mtu fault observed at a multisite enterprise WAN in Houston. Applying that approach alone would not establish the required result: Large application transfers succeed without repeated fragmentation or blackholing.

That approach is relevant to dmvpn tunnel key inconsistency, such as when gRE-encapsulated packets are rejected because the DMVPN endpoints use incompatible tunnel key settings. That is a different root cause from the gre ipsec mtu fault observed at a multisite enterprise WAN in Houston. Applying that approach alone would not establish the required result: Large application transfers succeed without repeated fragmentation or blackholing.

That approach is relevant to dmvpn mgre hub, such as when a single-hub DMVPN must support many dynamically registered spokes, but the hub tunnel is configured as a fixed point-to-point GRE tunnel. That is a different root cause from the gre ipsec mtu fault observed at a multisite enterprise WAN in Houston. Applying that approach alone would not establish the required result: Large application transfers succeed without repeated fragmentation or blackholing.

That observation verifies tunnel ipsec profile binding in a different situation, such as when spoke-to-hub GRE packets are being sent without the required encryption because no tunnel protection profile is attached. For the reported gre ipsec mtu incident at a multisite enterprise WAN in Houston, the required acceptance evidence is: Large application transfers succeed without repeated fragmentation or blackholing. This other result does not test that condition directly.

That observation verifies spoke multicast static mapping in a different situation, such as when a DMVPN spoke reaches the hub by unicast but its multicast routing hellos never reach the hub tunnel. For the reported gre ipsec mtu incident at a multisite enterprise WAN in Houston, the required acceptance evidence is: Large application transfers succeed without repeated fragmentation or blackholing. This other result does not test that condition directly.

That observation verifies hub dynamic multicast mappings in a different situation, such as when a DMVPN hub sees NHRP registrations but no EIGRP neighbors because tunneled multicast control packets cannot reach newly joined spokes. For the reported gre ipsec mtu incident at a multisite enterprise WAN in Houston, the required acceptance evidence is: Large application transfers succeed without repeated fragmentation or blackholing. This other result does not test that condition directly.

That approach is relevant to eigrp authentication key, such as when two routers see EIGRP hellos but never form neighbors after authentication was enabled with mismatched key configurations. That is a different root cause from the eigrp named mode af-interface fault observed at a university backbone in Sydney. Applying that approach alone would not establish the required result: The specified interface becomes an active neighbor-facing member of the address family.

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 named mode af-interface fault observed at a university backbone in Sydney. Applying that approach alone would not establish the required result: The specified interface becomes an active neighbor-facing member of the address family.

That approach is relevant to eigrp ipv6 address family, such as when iPv4 EIGRP is healthy but IPv6 routes are absent because the appropriate IPv6 routing address family was never activated. That is a different root cause from the eigrp named mode af-interface fault observed at a university backbone in Sydney. Applying that approach alone would not establish the required result: The specified interface becomes an active neighbor-facing member of the address family.

That observation verifies eigrp neighbor churn in a different situation, such as when an EIGRP peer repeatedly expires its hold time on a congested link with dropped control traffic. For the reported eigrp named mode af-interface incident at a university backbone in Sydney, the required acceptance evidence is: The specified interface becomes an active neighbor-facing member of the address family. This other result does not test that condition directly.

That observation verifies eigrp passive-interface in a different situation, such as when an EIGRP-enabled link never forms a neighbor relationship because it is configured as passive. For the reported eigrp named mode af-interface incident at a university backbone in Sydney, the required acceptance evidence is: The specified interface becomes an active neighbor-facing member of the address family. This other result does not test that condition directly.

That observation verifies stuck in active queries in a different situation, such as when an EIGRP route enters Active for excessive time because query replies never return from a remote branch. For the reported eigrp named mode af-interface incident at a university backbone in Sydney, the required acceptance evidence is: The specified interface becomes an active neighbor-facing member of the address family. This other result does not test that condition directly.