You are the read-only AI supervisor of a heterogeneous enter...
Prompt
You are the read-only AI supervisor of a heterogeneous enterprise IT infrastructure. Your task is to analyze the RFC 5424 syslog events below as a single observation window. You must behave as an experienced infrastructure/SRE/NOC engineer. Do NOT simply summarize the logs. Objectives: 1. Determine whether one or more actual incidents are occurring. 2. Correlate events across network, Windows, Linux, Active Directory, DNS, applications and infrastructure. 3. Reconstruct the most likely causal sequence. 4. Identify the most probable ROOT CAUSE, not merely the most visible symptom. 5. Distinguish primary incident signals from secondary effects and unrelated noise. 6. Identify the earliest useful leading indicator. 7. Estimate affected systems/services. 8. Assign severity and confidence. 9. Do not invent evidence that is not present in the logs. 10. If evidence is insufficient, explicitly state the uncertainty. 11. Do NOT recommend automatic remediation or configuration changes. 12. Recommend only additional READ-ONLY diagnostic queries/checks. Environment notes: * VLAN 17 is the main server VLAN. * dc01 and dc02 provide Active Directory and DNS. * filesrv03 provides SMB file services. * app01 is a Linux application server using LDAP authentication. * mon01 is the monitoring collector. * access-sw-07 is connected upstream to core-sw-01. * backup01 performs scheduled backup jobs. * fw01 is the Internet edge firewall. * Times are synchronized via NTP. * All events belong to the same site. LOGS: <134>1 2026-08-10T14:27:01.103+02:00 backup01 backupd 2271 JOB [job@32473 id="87421" type="incremental" target="vm-cluster" state="started"] Scheduled incremental backup started <134>1 2026-08-10T14:28:17.442+02:00 backup01 kernel - CPU [metric@32473 cpu="92.1" load1="11.7" load5="8.3"] CPU utilization above warning threshold <134>1 2026-08-10T14:29:52.014+02:00 fw01 authd 771 AUTHFAIL [auth@32473 src="185.220.101.34" user="admin" method="https" count="4"] Failed administrative login attempts <134>1 2026-08-10T14:30:02.991+02:00 core-sw-01 lldpd - NEIGHBOR [net@32473 localIf="Ten-GigabitEthernet1/0/48" remoteHost="access-sw-07" remoteIf="Ten-GigabitEthernet1/0/49"] LLDP neighbor refresh <132>1 2026-08-10T14:30:47.125+02:00 core-sw-01 transceiver - OPTICS [optics@32473 interface="Ten-GigabitEthernet1/0/48" rxPower="-12.8dBm" txPower="-2.1dBm" thresholdLow="-11.5dBm"] Optical receive power below warning threshold <132>1 2026-08-10T14:31:03.417+02:00 core-sw-01 ifmgr - LINK [net@32473 interface="Ten-GigabitEthernet1/0/48" state="up" speed="10Gbps" duplex="full"] Interface remains operational <132>1 2026-08-10T14:31:08.553+02:00 core-sw-01 ifmgr - IFERR [net@32473 interface="Ten-GigabitEthernet1/0/48" crcErrors="37" previousCrcErrors="0" interval="60s"] CRC errors detected <134>1 2026-08-10T14:31:14.882+02:00 access-sw-07 ifmgr - IFERR [net@32473 interface="Ten-GigabitEthernet1/0/49" inputErrors="21" drops="8" interval="60s"] Input errors detected on uplink <134>1 2026-08-10T14:31:41.095+02:00 mon01 ping 1902 LATENCY [probe@32473 target="dc01" vlan="17" rtt="48.2ms" baseline="1.4ms" loss="2%"] Latency deviation detected <134>1 2026-08-10T14:31:44.513+02:00 mon01 ping 1902 LATENCY [probe@32473 target="dc02" vlan="17" rtt="51.7ms" baseline="1.2ms" loss="3%"] Latency deviation detected <134>1 2026-08-10T14:31:52.200+02:00 mon01 ping 1902 LATENCY [probe@32473 target="filesrv03" vlan="17" rtt="44.9ms" baseline="0.9ms" loss="3%"] Latency deviation detected <132>1 2026-08-10T14:32:02.447+02:00 core-sw-01 ifmgr - IFERR [net@32473 interface="Ten-GigabitEthernet1/0/48" crcErrors="184" previousCrcErrors="37" interval="60s"] CRC error rate increasing <132>1 2026-08-10T14:32:11.170+02:00 dc01 dns 3184 DNSSTAT [dns@32473 avgLatency="93ms" baseline="4ms" timeoutRate="6.2%" qps="681"] DNS response degradation <132>1 2026-08-10T14:32:14.662+02:00 dc02 dns 3021 DNSSTAT [dns@32473 avgLatency="87ms" baseline="3ms" timeoutRate="5.4%" qps="644"] DNS response degradation <134>1 2026-08-10T14:32:18.781+02:00 dc01 lsass 744 LDAPSTAT [ad@32473 bindLatency="119ms" baseline="8ms" failedBinds="3"] LDAP bind latency increased <134>1 2026-08-10T14:32:21.227+02:00 dc02 lsass 728 LDAPSTAT [ad@32473 bindLatency="108ms" baseline="7ms" failedBinds="2"] LDAP bind latency increased <134>1 2026-08-10T14:32:27.901+02:00 dc01 system 4 HEALTH [host@32473 cpu="21%" memory="48%" diskLatency="1.8ms"] Host resource utilization normal <134>1 2026-08-10T14:32:29.882+02:00 dc02 system 4 HEALTH [host@32473 cpu="18%" memory="44%" diskLatency="1.3ms"] Host resource utilization normal <132>1 2026-08-10T14:32:44.602+02:00 app01 sssd 1843 LDAP [auth@32473 server="dc01" operation="bind" duration="2.01s"] LDAP server connection timeout <132>1 2026-08-10T14:32:47.119+02:00 app01 sssd 1843 LDAP [auth@32473 server="dc02" operation="bind" duration="2.00s"] LDAP server connection timeout <132>1 2026-08-10T14:32:51.335+02:00 filesrv03 srv 4 SMB [service@32473 activeSessions="187" authFailures="14" baselineAuthFailures="0"] SMB authentication failures above baseline <134>1 2026-08-10T14:33:03.090+02:00 backup01 backupd 2271 JOB [job@32473 id="87421" throughput="802MB/s" state="running"] Backup proceeding normally <132>1 2026-08-10T14:33:07.445+02:00 core-sw-01 ifmgr - IFERR [net@32473 interface="Ten-GigabitEthernet1/0/48" crcErrors="516" previousCrcErrors="184" inputDrops="72" interval="60s"] Rapidly increasing physical-layer errors <132>1 2026-08-10T14:33:14.991+02:00 mon01 dnsprobe 2118 DNS [probe@32473 server="dc01" timeoutRate="17.8%" median="212ms"] DNS service degradation confirmed <132>1 2026-08-10T14:33:16.227+02:00 mon01 dnsprobe 2118 DNS [probe@32473 server="dc02" timeoutRate="15.9%" median="198ms"] DNS service degradation confirmed <134>1 2026-08-10T14:33:20.411+02:00 dc01 netstat - TCP [metric@32473 retransmits="214" baseline="9" interval="60s"] TCP retransmissions above baseline <134>1 2026-08-10T14:33:22.831+02:00 dc02 netstat - TCP [metric@32473 retransmits="198" baseline="7" interval="60s"] TCP retransmissions above baseline <132>1 2026-08-10T14:33:29.101+02:00 app01 nginx 1174 HTTP [service@32473 status="503" count="31" interval="60s" dependency="LDAP"] Authentication-dependent HTTP requests failing <134>1 2026-08-10T14:33:37.940+02:00 fw01 authd 771 AUTH [auth@32473 src="185.220.101.34" user="admin" method="https" result="blocked"] Source blocked after repeated authentication failures <132>1 2026-08-10T14:34:04.277+02:00 access-sw-07 ifmgr - IFERR [net@32473 interface="Ten-GigabitEthernet1/0/49" inputErrors="491" drops="103" interval="60s"] Uplink errors rapidly increasing <132>1 2026-08-10T14:34:09.491+02:00 core-sw-01 transceiver - OPTICS [optics@32473 interface="Ten-GigabitEthernet1/0/48" rxPower="-14.1dBm" txPower="-2.1dBm" thresholdLow="-11.5dBm"] Optical receive power deteriorating <132>1 2026-08-10T14:34:16.002+02:00 mon01 ping 1902 LOSS [probe@32473 target="filesrv03" vlan="17" rtt="117ms" loss="11%"] Severe network degradation <132>1 2026-08-10T14:34:18.711+02:00 mon01 ping 1902 LOSS [probe@32473 target="app01" vlan="17" rtt="121ms" loss="13%"] Severe network degradation <134>1 2026-08-10T14:34:23.810+02:00 backup01 kernel - CPU [metric@32473 cpu="89.4" load1="10.9"] CPU utilization remains above warning threshold <132>1 2026-08-10T14:34:31.099+02:00 filesrv03 srv 4 SMB [service@32473 authFailures="68" disconnectedSessions="23" interval="60s"] SMB service impact increasing <132>1 2026-08-10T14:34:38.422+02:00 dc01 netlogon 936 AUTH [ad@32473 failures="41" interval="60s"] Domain authentication failures above baseline <132>1 2026-08-10T14:34:40.777+02:00 dc02 netlogon 912 AUTH [ad@32473 failures="36" interval="60s"] Domain authentication failures above baseline <132>1 2026-08-10T14:35:03.200+02:00 core-sw-01 ifmgr - IFERR [net@32473 interface="Ten-GigabitEthernet1/0/48" crcErrors="1041" previousCrcErrors="516" inputDrops="184" interval="60s"] Critical interface error rate <134>1 2026-08-10T14:35:08.173+02:00 dc01 system 4 HEALTH [host@32473 cpu="24%" memory="49%" diskLatency="1.9ms"] Host resources remain normal <134>1 2026-08-10T14:35:09.830+02:00 dc02 system 4 HEALTH [host@32473 cpu="20%" memory="45%" diskLatency="1.5ms"] Host resources remain normal Return ONLY valid JSON using exactly this schema: { "incident_detected": true, "incident_count": 0, "severity": "info|low|medium|high|critical", "confidence": 0.00, "probable_root_cause": "", "root_cause_layer": "physical|datalink|network|transport|service|application|host|unknown", "primary_device_or_service": "", "incident_start_time": "", "earliest_leading_indicator": { "timestamp": "", "event": "", "why_it_matters": "" }, "causal_chain": [ { "step": 1, "timestamp": "", "observation": "", "interpretation": "" } ], "affected_systems": [], "affected_services": [], "secondary_symptoms": [], "unrelated_or_low_relevance_events": [ { "event": "", "reason": "" } ], "supporting_evidence": [], "alternative_hypotheses": [ { "hypothesis": "", "probability": "low|medium|high", "reason": "" } ], "read_only_next_checks": [], "operator_summary": "" } Additional evaluation rules: * Prefer the explanation requiring the fewest unsupported assumptions. * Temporal correlation alone is not sufficient evidence of causality. * Shared downstream failures should cause you to search for a common upstream dependency. * A service emitting errors is not necessarily the failed component. * High CPU, authentication failures, security events, or backup activity may be coincidental. * Do not classify an event as unrelated without explaining why. * Do not infer a cable/transceiver/device failure more specifically than the available evidence supports. * The operator_summary must be concise enough to send as a NOC alert and must state the likely cause, impact, confidence and first diagnostic action.
