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Root cause analysis / Investigation

api.mistral.ai

Reference RCA-27B2D6295C06912B

Mistral API endpoint

Measurement point: Stealth NYC, 32 Avenue of the Americas.

Published investigation. Updates run automatically.

01 / Network path

Network path.

Endpoint measurements / ICMP IPv4

Latency over time.

Successful endpoint RTT recordings from up to one hour before and after the event. Points are sampled from the retained history.

Enter time range

Times use the selected timezone; choices include recorded samples and intervals across the available chart.

Use the recordings table below to view latency values.
Successful RTT recording Event interval

03 Nov 2026 19:40 – 04 Nov 2026 00:34 UTC. Hover or tap to inspect; drag across the chart to zoom. On touchscreens, first choose Select time range. Escape or Reset zoom restores the full range. Missing recordings are gaps; this is not an application availability or packet-loss chart.

Select a recording to explore nearby path observations.

View recorded values
Successful ICMP IPv4 RTT recordings; displayed points are a sample of the retained records.
Recorded at (UTC)RTT
1.769 ms
1.389 ms
1.422 ms
1.431 ms
1.735 ms
1.770 ms
1.358 ms
1.433 ms
1.492 ms
1.621 ms
1.446 ms
1.791 ms
1.731 ms
1.728 ms
1.503 ms
1.705 ms
1.345 ms
1.905 ms
1.348 ms
1.409 ms
1.716 ms
1.679 ms
1.344 ms
1.732 ms
1.337 ms
1.710 ms
1.771 ms
1.382 ms
1.425 ms
1.718 ms
1.771 ms
1.699 ms
1.699 ms
1.314 ms
1.734 ms
1.437 ms
1.341 ms
1.721 ms
1.812 ms
1.396 ms
1.319 ms
1.402 ms
1.355 ms
1.414 ms
1.828 ms
1.719 ms
1.315 ms
1.371 ms
1.360 ms
1.360 ms
1.377 ms
1.391 ms
1.804 ms
1.355 ms
1.384 ms
1.728 ms
1.731 ms
1.394 ms
1.832 ms
1.495 ms
1.417 ms
1.671 ms
1.763 ms
1.429 ms
1.342 ms
1.716 ms
1.409 ms
1.360 ms
1.317 ms
1.737 ms
1.393 ms
1.739 ms
1.677 ms
1.422 ms
1.747 ms
1.798 ms
1.869 ms
1.799 ms
1.322 ms
1.412 ms
1.407 ms
1.499 ms
1.334 ms
1.750 ms
1.768 ms
1.720 ms
1.786 ms
1.717 ms
1.945 ms
1.820 ms
1.745 ms
1.689 ms
1.616 ms
1.412 ms
1.862 ms
1.731 ms
1.384 ms
1.381 ms
1.765 ms
1.814 ms
1.740 ms
1.695 ms
1.375 ms
2.564 ms
1.444 ms
5.087 ms
1.379 ms
1.707 ms
1.909 ms
1.713 ms
1.760 ms
1.714 ms
1.689 ms
1.819 ms
1.635 ms
3.125 ms
1.862 ms
1.907 ms
3.985 ms
3.059 ms
4.912 ms
1.736 ms
1.784 ms
3.469 ms
3.742 ms
3.607 ms
1.740 ms
1.774 ms
2.777 ms
3.912 ms
1.713 ms
1.370 ms
1.691 ms
2.395 ms
2.049 ms
1.684 ms
1.738 ms
10.525 ms
1.709 ms
1.700 ms
1.740 ms
1.775 ms
1.694 ms
1.719 ms
1.714 ms
1.694 ms
1.973 ms
3.647 ms
1.732 ms
3.663 ms
1.776 ms
3.643 ms
1.808 ms
1.688 ms
1.788 ms
2.778 ms
1.771 ms
1.880 ms
3.595 ms
3.715 ms
1.795 ms
1.724 ms
1.757 ms
3.576 ms
1.722 ms
3.669 ms
3.748 ms
3.627 ms
3.668 ms
1.709 ms
3.722 ms
3.678 ms
1.768 ms
1.760 ms
1.780 ms
3.639 ms
1.734 ms
1.731 ms
1.681 ms
1.757 ms
1.714 ms
3.663 ms
1.862 ms
3.693 ms
1.755 ms
1.899 ms
1.813 ms
3.743 ms
1.690 ms
1.794 ms
3.730 ms
3.727 ms
1.709 ms
3.788 ms
1.697 ms
1.743 ms
3.756 ms
3.717 ms
1.730 ms
3.744 ms
1.757 ms
1.984 ms
1.693 ms
1.706 ms
1.756 ms
3.794 ms
3.791 ms
1.722 ms
1.681 ms
3.795 ms
3.754 ms
1.682 ms
3.761 ms
1.749 ms
1.718 ms
1.775 ms
1.882 ms
3.807 ms
1.715 ms
3.823 ms
3.801 ms
3.743 ms
3.810 ms
3.788 ms
1.729 ms
3.789 ms
3.809 ms
1.827 ms
1.712 ms
1.845 ms
1.353 ms
1.839 ms
1.293 ms
1.342 ms
1.782 ms
1.688 ms
1.507 ms
1.778 ms
1.693 ms
1.702 ms
1.700 ms
1.718 ms
1.822 ms
1.706 ms
1.348 ms
1.776 ms
1.350 ms
1.363 ms
1.874 ms
1.341 ms
1.752 ms
1.333 ms
1.791 ms
1.340 ms
1.708 ms
1.715 ms
1.373 ms
1.722 ms
1.706 ms
1.677 ms
1.350 ms
1.686 ms
1.344 ms
1.369 ms
1.835 ms
1.723 ms
1.317 ms
1.752 ms
1.781 ms
1.715 ms
1.366 ms
1.333 ms
1.375 ms
3.818 ms
1.692 ms
1.720 ms
1.700 ms
1.558 ms
1.301 ms
1.353 ms
1.420 ms
1.342 ms
1.703 ms
1.668 ms
1.685 ms
1.323 ms
1.354 ms
1.400 ms
1.765 ms
1.325 ms
1.952 ms
1.812 ms
1.308 ms
1.325 ms
1.294 ms
1.804 ms
1.745 ms
1.721 ms
1.804 ms
1.306 ms
1.297 ms
1.397 ms
1.708 ms
1.748 ms
1.794 ms
4.263 ms
1.944 ms
1.408 ms
2.967 ms
1.756 ms
1.338 ms
1.332 ms
4.453 ms
43.596 ms
1.313 ms
1.425 ms
1.357 ms
1.308 ms
1.698 ms
1.734 ms
1.742 ms
1.350 ms
1.733 ms
1.780 ms
1.385 ms
1.749 ms
1.755 ms
1.422 ms
1.689 ms
1.332 ms
1.337 ms
1.759 ms
1.738 ms
1.328 ms
1.338 ms
1.710 ms
1.406 ms
1.327 ms
1.390 ms
1.406 ms
1.343 ms
1.717 ms
1.711 ms
1.378 ms
1.330 ms
1.846 ms
1.318 ms
1.298 ms
1.355 ms
1.821 ms
1.358 ms
1.346 ms
1.765 ms
1.720 ms
1.314 ms
1.354 ms
2.250 ms
1.708 ms
1.791 ms
Network path / recorded observations

Network path observations.

17 observations

Choose a measurement type to see the closest of the available sampled observations to the selected chart point. Each probe is separate and may follow a different path.

Before

ICMP traceroute · Recorded address 1

Recorded trace · destination not reached by this trace


to UTC

  1. TTL 1 Probe hop0.134 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.182 msReply RTT AS8002 · Stealth
Before

TCP traceroute / 443 · Recorded address 1

Recorded trace · destination replied


to UTC

  1. TTL 1 Probe hop0.182 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.184 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop48.144 msReply RTT AS13335 · Cloudflare
  4. TTL 4 Probe hopNo replyNo comparable RTT ASN unavailable
  5. TTL 5 Probe hop4.472 msReply RTT AS13335 · Cloudflare
  6. TTL 6 Probe hopNo replyNo comparable RTT ASN unavailable
  7. TTL 7 Destination1.652 msReply RTT AS13335 · Cloudflare
Before

ICMP traceroute · Recorded address 2

Recorded trace · destination not reached by this trace


to UTC

  1. TTL 1 Probe hop0.133 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.183 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop4.533 msReply RTT AS13335 · Cloudflare
Before

TCP traceroute / 443 · Recorded address 2

Recorded trace · destination replied


to UTC

  1. TTL 1 Probe hop0.204 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.290 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop1.354 msReply RTT AS13335 · Cloudflare
  4. TTL 4 Probe hopNo replyNo comparable RTT ASN unavailable
  5. TTL 5 Probe hop8.765 msReply RTT AS13335 · Cloudflare
  6. TTL 6 Probe hopNo replyNo comparable RTT ASN unavailable
  7. TTL 7 Destination1.801 msReply RTT AS13335 · Cloudflare
Before

TCP traceroute / 443 · Recorded address 2

Recorded trace · destination replied


to UTC

  1. TTL 1 Probe hop0.261 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.183 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hopNo replyNo comparable RTT ASN unavailable
  4. TTL 4 Probe hopNo replyNo comparable RTT ASN unavailable
  5. TTL 5 Probe hop2.307 msReply RTT AS13335 · Cloudflare
  6. TTL 6 Probe hopNo replyNo comparable RTT ASN unavailable
  7. TTL 7 Destination10.922 msReply RTT AS13335 · Cloudflare
During

ICMP traceroute · Recorded address 2

Recorded trace · destination not reached by this trace


to UTC

  1. TTL 1 Probe hop0.633 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.189 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop18.470 msReply RTT ASN unavailable
During

TCP traceroute / 443 · Recorded address 1

Recorded trace · destination replied


to UTC

  1. TTL 1 Probe hop0.142 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.180 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop29.261 msReply RTT ASN unavailable
  4. TTL 4 Probe hopNo replyNo comparable RTT ASN unavailable
  5. TTL 5 Probe hop1.546 msReply RTT AS13335 · Cloudflare
  6. TTL 6 Probe hopNo replyNo comparable RTT ASN unavailable
  7. TTL 7 Destination1.262 msReply RTT AS13335 · Cloudflare
During

ICMP traceroute · Recorded address 1

Recorded trace · destination not reached by this trace


to UTC

  1. TTL 1 Probe hop0.116 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.175 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop11.595 msReply RTT AS13335 · Cloudflare
During

TCP traceroute / 443 · Recorded address 1

Recorded trace · destination replied


to UTC

  1. TTL 1 Probe hop0.675 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.181 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop1.649 msReply RTT AS13335 · Cloudflare
  4. TTL 4 Probe hopNo replyNo comparable RTT ASN unavailable
  5. TTL 5 Probe hop1.540 msReply RTT AS13335 · Cloudflare
  6. TTL 6 Destination1.578 msReply RTT AS13335 · Cloudflare
During

ICMP traceroute · Recorded address 2

Recorded trace · destination not reached by this trace


to UTC

  1. TTL 1 Probe hop0.128 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.187 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop2.175 msReply RTT ASN unavailable
During

TCP traceroute / 443 · Recorded address 2

Recorded trace · destination replied


to UTC

  1. TTL 1 Probe hop0.195 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.285 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop25.145 msReply RTT ASN unavailable
  4. TTL 4 Probe hopNo replyNo comparable RTT ASN unavailable
  5. TTL 5 Probe hop1.467 msReply RTT AS13335 · Cloudflare
  6. TTL 6 Probe hopNo replyNo comparable RTT ASN unavailable
  7. TTL 7 Destination2.173 msReply RTT AS13335 · Cloudflare
After

ICMP traceroute · Recorded address 2

Recorded trace · destination not reached by this trace


to UTC

  1. TTL 1 Probe hop0.134 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.176 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop1.604 msReply RTT ASN unavailable
After

TCP traceroute / 443 · Recorded address 2

Recorded trace · destination replied


to UTC

  1. TTL 1 Probe hop0.145 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.186 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop1.005 msReply RTT ASN unavailable
  4. TTL 4 Probe hopNo replyNo comparable RTT ASN unavailable
  5. TTL 5 Probe hop1.663 msReply RTT AS13335 · Cloudflare
  6. TTL 6 Destination1.173 msReply RTT AS13335 · Cloudflare
After

ICMP traceroute · Recorded address 1

Recorded trace · destination not reached by this trace


to UTC

  1. TTL 1 Probe hop0.124 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.317 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop8.286 msReply RTT ASN unavailable
After

TCP traceroute / 443 · Recorded address 2

Recorded trace · destination replied


to UTC

  1. TTL 1 Probe hop0.196 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.257 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop16.192 msReply RTT ASN unavailable
  4. TTL 4 Probe hopNo replyNo comparable RTT ASN unavailable
  5. TTL 5 Probe hop1.740 msReply RTT AS13335 · Cloudflare
  6. TTL 6 Destination1.264 msReply RTT AS13335 · Cloudflare
After

ICMP traceroute · Recorded address 2

Recorded trace · destination not reached by this trace


to UTC

  1. TTL 1 Probe hop0.175 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.172 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop1.986 msReply RTT AS13335 · Cloudflare
After

TCP traceroute / 443 · Recorded address 2

Recorded trace · destination replied


to UTC

  1. TTL 1 Probe hop0.191 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.195 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop0.811 msReply RTT AS13335 · Cloudflare
  4. TTL 4 Probe hopNo replyNo comparable RTT ASN unavailable
  5. TTL 5 Probe hop3.083 msReply RTT AS13335 · Cloudflare
  6. TTL 6 Probe hopNo replyNo comparable RTT ASN unavailable
  7. TTL 7 Destination2.025 msReply RTT AS13335 · Cloudflare

RTT is the round trip to each responding hop, not the delay of the preceding link. TTL order may omit routers and does not prove direct links. A missing reply is not proof of packet loss. ASN labels are dated address associations; they do not establish the forwarding path or the operator at the event time. Up to three recorded traces per method and period are selected across the archive. Where no individual trace is available, a comparison may summarize a window; MTR observations aggregate multiple probes. Address aliases are independent across measurement types.

Same method / same recorded address

Compare the traces.

Compare one selected trace from before the event with one during it. Values are individual replies, not a statistical comparison.

ICMP traceroute · Recorded address 1

Before: UTC · During: UTC

Same destination address and probe method. A matching TTL does not establish the same forwarding path.
TTLBefore RTTDuring RTTResponding address
10.134 msAS8002 · Stealth0.116 msAS8002 · StealthSame responder
20.182 msAS8002 · Stealth0.175 msAS8002 · StealthSame responder
3Not recorded11.595 msAS13335 · CloudflareNot established
ICMP traceroute · Recorded address 2

Before: UTC · During: UTC

Same destination address and probe method. A matching TTL does not establish the same forwarding path.
TTLBefore RTTDuring RTTResponding address
10.133 msAS8002 · Stealth0.633 msAS8002 · StealthSame responder
20.183 msAS8002 · Stealth0.189 msAS8002 · StealthSame responder
34.533 msAS13335 · Cloudflare18.470 msSame responder
TCP traceroute / 443 · Recorded address 1

Before: UTC · During: UTC

Same destination address and probe method. A matching TTL does not establish the same forwarding path.
TTLBefore RTTDuring RTTResponding address
10.182 msAS8002 · Stealth0.142 msAS8002 · StealthSame responder
20.184 msAS8002 · Stealth0.180 msAS8002 · StealthSame responder
348.144 msAS13335 · Cloudflare29.261 msSame responder
4No replyNo replyNot established
54.472 msAS13335 · Cloudflare1.546 msAS13335 · CloudflareDifferent responders
6No replyNo replyNot established
71.652 msAS13335 · Cloudflare1.262 msAS13335 · CloudflareSame responder
TCP traceroute / 443 · Recorded address 2

Before: UTC · During: UTC

Same destination address and probe method. A matching TTL does not establish the same forwarding path.
TTLBefore RTTDuring RTTResponding address
10.261 msAS8002 · Stealth0.195 msAS8002 · StealthSame responder
20.183 msAS8002 · Stealth0.285 msAS8002 · StealthSame responder
3No reply25.145 msNot established
4No replyNo replyNot established
52.307 msAS13335 · Cloudflare1.467 msAS13335 · CloudflareDifferent responders
6No replyNo replyNot established
710.922 msAS13335 · Cloudflare2.173 msAS13335 · CloudflareSame responder

RTTs include the return path. Different responders, missing replies and independent probe flows limit what a change can localize. MTR snapshots remain separate in the replay.

Event timeline.

Latency anomaly. Times shown are UTC.

Event opened
UTC
Last event observation
UTC
Recovery observed
UTC

Recorded recovery describes this event, not current reachability.

02 / Assessment

Assessment.

Investigation stateRecovered
Path assessment

Elevated latency observed.

Endpoint round-trip time was elevated during part of the event. The available path observations do not identify where the increase occurred.

What we observed

  • A sustained increase in measured round trip time was observed.
  • Stored traces were compared using matching source and destination addresses.

Recording counts describe collected measurements, not application availability or packet loss. Exact packet paths and the return path remain unverified.

Measurements at a glance.

Baseline RTT1.637 msUsual round trip before the event
Last recorded event RTT1.702 msLast successful event recording
Event p95 RTT3.824 ms95th percentile of successful recordings
Change from baseline+0.065 msLast event RTT compared with the baseline
Successful / expected recordings326 / 350Recorded endpoint samples during the event

RTT is round trip time; p95 describes the upper range of successful recordings. Endpoint measurements differ from individual trace replies and are not an uptime percentage.

Record sources and timestamps
Analysis updated
UTC
Public snapshot published
UTC
Public observation window
– UTC

Event and source timestamps are UTC. The latency chart uses its selected timezone. Page refresh times are separate from measurement timestamps.

03 / Method and limits

Method and limits.

How to interpret the sampled path and its limits

Corroborating the path.

Comparisons use matching destinations before and during the event. ICMP traces use echo probes. TCP/443 traces send SYN probes to port 443 only; they do not complete a TCP handshake or perform a TLS or HTTP exchange.

The Stealth gNMI interface verifies the active route-table choice and maps its primary next hop to the Stealth logical interface, configured attachment and, where applicable, the known LAG member set at each snapshot. Stable Stealth replies, together with mapped interface evidence showing no corresponding errors or sustained capacity pressure, reduce the likelihood of a Stealth forwarding issue. An 80% load warning warrants investigation; it does not prove congestion. Lower interval averages can conceal bursts or queue pressure. Optical readings assess the physical link, not congestion.

What remains unseen.

Probe reply handling can differ from packet forwarding. A slow intermediate reply that disappears at later hops does not locate a forwarding problem. A destination that does not respond to a trace is not thereby shown to be unavailable.

Stealth does not use ECMP in this monitored scope. The route snapshot does not identify which physical LAG member carried a particular independent probe, attest line-card forwarding at that packet instant, prove the exact application packet flow or observe the return path. RTT includes the return path, which may differ. No remote reverse traceroute is available. Tunnels and silent routers may hide parts of the path. Address registration alone does not establish the forwarding operator or responsibility.

References: ICMP reply handling / RFC 1812 · Round trip measurements / RFC 2681 · Full methodology