Network Services And Operations
101 incident problems about Network Services And Operations. Start with the reviewed ones.
먼저 읽을 가이드
추천 문제
All problems (101)
NETWORK-369A QoS policy marks the right classes while tunnel overhead changed and one class now fragments or drops before the shaped queue ever sees it during a staged decommissionClassification is correct, but the packet size math no longer fits the path. The service still works through the primary path, but one dependency only fails when the old component is finally drained away.NetworkAdvanced17 minProNETWORK-336A gateway IP remains stable while one downstream security policy still keys off the previous virtual MAC after a fabric migration during a failover rehearsalAddress continuity masks an identity change that another control still cares about. Normal traffic masked the issue until the standby or alternate path became active under rehearsal conditions.NetworkAdvanced18 minProNETWORK-158A multicast RP failover is configured, but MSDP source-active filtering drops one application's group range and recovery never completesCore redundancy exists, yet the failover control-plane view excludes the affected stream set.NetworkAdvanced18 minProNETWORK-306A QoS trust boundary changed on one edge while policy-map assumptions on the WAN handoff still reflect the old marking point during a failover rehearsalMarking is correct in one segment and wrong by the time traffic reaches the WAN policy decision. Normal traffic masked the issue until the standby or alternate path became active under rehearsal conditions.NetworkAdvanced18 minProNETWORK-110The ACL is accepted in the config, but TCAM is full and the new deny rule is never programmed into hardwareOperators trust the running configuration, yet packets keep flowing because the forwarding ASIC could not install the rule set.NetworkAdvanced18 minProNETWORK-1029A QoS policy marks the right classes (Timeouts and Latency)A QoS policy marks the right classes (Timeouts and Latency) focuses on Network Services And Operations and asks the reader to isolate Timeouts and Latency in Cisco. 실무에서는 Timeouts and Latency 이슈를 볼 때 DNS, 라우팅, ACL/방화벽, 목적지 응답을 계층별로 잘라서 확인하면 장애 구간을 훨씬 빠르게 좁힐 수 있습니다.NetworkAdvanced28 minProNETWORK-130A NetFlow exporter uses a source interface in the management VRF, and the collector never receives records from production pathsTraffic forwarding is fine, but telemetry is dark because the export packets live in a different routing domain than the collector path.NetworkIntermediate15 minProNETWORK-375AAA succeeds on the core path while device admin sourced from an out-of-band interface now hits a different policy realm than production traffic during a staged decommissionThe server is reachable, yet the management path is classified into the wrong authorization domain. The service still works through the primary path, but one dependency only fails when the old component is finally drained away.NetworkIntermediate15 minProNETWORK-116A multi-auth 802.1X port authorizes the phone, but the PC loops through reauthentication when the data MAC ages outVoice stays online, yet desktop access flaps because the access policy handles multiple identities with different aging behavior.NetworkIntermediate16 minProNETWORK-264A TACACS fallback local user exists while the AAA method list order never actually reaches it during timeout during a failover rehearsalThe backup plan is configured and the evaluation chain never invokes it. Normal traffic masked the issue until the standby or alternate path became active under rehearsal conditions.NetworkIntermediate16 minProNETWORK-312AAA reachability survives while the method list order now prefers an unintended fallback before the authoritative server is tried during a failover rehearsalThe protocol path is there and the evaluation chain picks the wrong branch first. Normal traffic masked the issue until the standby or alternate path became active under rehearsal conditions.NetworkIntermediate16 minProNETWORK-128IPv6 ND inspection keeps a stale binding after renumbering, and hosts with new addresses cannot pass traffic on the access edgeSecurity stays enabled, but address lifecycle assumptions lag behind the renumbered endpoint state.NetworkIntermediate16 minProNETWORK-127A QoS policy references the correct class map, but after a subinterface migration it is attached in the wrong direction and voice jitter returnsConfiguration objects are present, yet the path where they matter no longer sees the service-policy.NetworkAdvanced17 minProNETWORK-252A QoS trust boundary shifts from phone to switchport while one access stack still rewrites DSCP at ingress during a failover rehearsalThe policy is consistent in design and one stack never received the new trust assumption. Normal traffic masked the issue until the standby or alternate path became active under rehearsal conditions.NetworkIntermediate17 minProNETWORK-491AAA succeeds on the core path (Permission Denied)AAA succeeds on the core path (Permission Denied) focuses on Network Services And Operations and asks the reader to isolate Permission Denied in Cisco. 실무에서는 auth-and-session-failure 이슈를 볼 때 DNS, 라우팅, ACL/방화벽, 목적지 응답을 계층별로 잘라서 확인하면 장애 구간을 훨씬 빠르게 좁힐 수 있습니다.NetworkIntermediate17 minProNETWORK-495AAA succeeds on the core path (Permission Denied)AAA succeeds on the core path (Permission Denied) focuses on Network Services And Operations and asks the reader to isolate Permission Denied in Cisco. 실무에서는 auth-and-session-failure 이슈를 볼 때 DNS, 라우팅, ACL/방화벽, 목적지 응답을 계층별로 잘라서 확인하면 장애 구간을 훨씬 빠르게 좁힐 수 있습니다.NetworkIntermediate17 minProNETWORK-381A multicast boundary permits the intended groupA multicast boundary permits the intended group focuses on Network Services And Operations and asks the reader to isolate Rollout Stuck in Cisco. 실무에서는 rollout-stuck 이슈를 볼 때 DNS, 라우팅, ACL/방화벽, 목적지 응답을 계층별로 잘라서 확인하면 장애 구간을 훨씬 빠르게 좁힐 수 있습니다.NetworkAdvanced18 minProNETWORK-276A multicast PIM neighbor forms while the RPF route still points at the wrong side of the tree during a failover rehearsalControl-plane adjacency exists while the forwarding lookup that matters disagrees. Normal traffic masked the issue until the standby or alternate path became active under rehearsal conditions.NetworkAdvanced18 minProNETWORK-551AAA succeeds on the core path (Permission Denied)AAA succeeds on the core path (Permission Denied) focuses on Network Services And Operations and asks the reader to isolate Permission Denied in Cisco. 실무에서는 auth-and-session-failure 이슈를 볼 때 DNS, 라우팅, ACL/방화벽, 목적지 응답을 계층별로 잘라서 확인하면 장애 구간을 훨씬 빠르게 좁힐 수 있습니다.NetworkIntermediate18 minProNETWORK-555AAA succeeds on the core path (Permission Denied)AAA succeeds on the core path (Permission Denied) focuses on Network Services And Operations and asks the reader to isolate Permission Denied in Cisco. 실무에서는 auth-and-session-failure 이슈를 볼 때 DNS, 라우팅, ACL/방화벽, 목적지 응답을 계층별로 잘라서 확인하면 장애 구간을 훨씬 빠르게 좁힐 수 있습니다.NetworkIntermediate18 minPro