Start an order
Root cause analysis / Investigation

copilot.com

Reference RCA-D6640D50361A9663

Microsoft Chat website

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

05 Nov 2026 14:15 – 05 Nov 2026 17:29 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
6.274 ms
6.276 ms
6.253 ms
6.290 ms
6.293 ms
6.249 ms
6.270 ms
6.268 ms
6.690 ms
6.710 ms
6.708 ms
6.743 ms
6.717 ms
6.706 ms
6.735 ms
6.711 ms
6.723 ms
6.693 ms
6.730 ms
6.764 ms
6.714 ms
6.700 ms
6.736 ms
6.717 ms
6.728 ms
6.721 ms
6.712 ms
6.795 ms
6.721 ms
6.700 ms
6.743 ms
6.731 ms
6.701 ms
6.739 ms
6.723 ms
6.738 ms
6.719 ms
6.707 ms
6.730 ms
6.737 ms
6.711 ms
6.733 ms
6.707 ms
6.723 ms
6.750 ms
6.732 ms
6.733 ms
6.744 ms
6.708 ms
6.729 ms
6.750 ms
6.740 ms
6.761 ms
6.727 ms
6.710 ms
6.768 ms
6.734 ms
6.760 ms
6.695 ms
6.813 ms
6.748 ms
6.768 ms
6.720 ms
6.741 ms
6.752 ms
6.716 ms
6.708 ms
6.713 ms
6.935 ms
6.754 ms
6.727 ms
6.761 ms
6.745 ms
6.799 ms
6.801 ms
6.774 ms
6.762 ms
6.766 ms
6.780 ms
6.868 ms
6.866 ms
6.857 ms
6.864 ms
6.850 ms
6.845 ms
6.863 ms
6.885 ms
6.874 ms
6.860 ms
6.860 ms
6.850 ms
6.717 ms
6.729 ms
6.781 ms
6.882 ms
6.755 ms
6.780 ms
6.712 ms
7.374 ms
6.782 ms
6.725 ms
6.731 ms
6.720 ms
6.937 ms
6.742 ms
6.739 ms
6.735 ms
6.817 ms
6.748 ms
6.765 ms
6.795 ms
6.813 ms
6.912 ms
6.731 ms
6.740 ms
6.730 ms
6.802 ms
6.803 ms
6.731 ms
6.742 ms
6.886 ms
6.820 ms
6.745 ms
6.785 ms
6.757 ms
6.723 ms
6.716 ms
22.833 ms
22.820 ms
22.829 ms
22.844 ms
22.891 ms
22.810 ms
22.837 ms
22.918 ms
22.810 ms
22.793 ms
22.868 ms
22.847 ms
22.856 ms
22.820 ms
22.866 ms
22.867 ms
22.877 ms
22.859 ms
22.879 ms
22.859 ms
22.830 ms
22.839 ms
22.815 ms
22.831 ms
22.839 ms
22.827 ms
22.882 ms
22.891 ms
22.849 ms
22.872 ms
22.864 ms
22.860 ms
22.861 ms
22.864 ms
22.867 ms
22.857 ms
22.898 ms
22.822 ms
22.836 ms
22.908 ms
22.834 ms
22.954 ms
22.853 ms
22.861 ms
22.850 ms
22.867 ms
22.851 ms
22.818 ms
22.940 ms
22.845 ms
22.823 ms
22.848 ms
22.853 ms
22.826 ms
22.863 ms
22.815 ms
22.881 ms
22.869 ms
22.952 ms
22.840 ms
22.866 ms
22.829 ms
22.877 ms
22.862 ms
22.881 ms
22.845 ms
22.857 ms
22.828 ms
22.836 ms
22.902 ms
22.855 ms
22.839 ms
22.836 ms
22.793 ms
22.855 ms
22.805 ms
22.812 ms
22.895 ms
22.878 ms
22.883 ms
22.781 ms
22.812 ms
22.830 ms
6.744 ms
6.753 ms
6.725 ms
6.729 ms
6.406 ms
6.409 ms
6.397 ms
6.509 ms
6.393 ms
6.409 ms
6.390 ms
6.379 ms
6.414 ms
6.421 ms
6.409 ms
6.456 ms
6.401 ms
6.400 ms
6.414 ms
6.380 ms
6.412 ms
6.469 ms
6.390 ms
6.409 ms
6.424 ms
6.378 ms
6.439 ms
6.391 ms
6.429 ms
6.414 ms
6.464 ms
6.382 ms
6.469 ms
6.391 ms
6.533 ms
6.455 ms
6.421 ms
6.404 ms
6.443 ms
6.765 ms
6.430 ms
6.406 ms
6.534 ms
6.471 ms
6.393 ms
6.500 ms
6.410 ms
6.486 ms
6.415 ms
6.531 ms
6.401 ms
6.457 ms
6.374 ms
6.472 ms
6.583 ms
6.549 ms
6.387 ms
6.450 ms
6.395 ms
6.418 ms
6.433 ms
6.396 ms
6.497 ms
6.393 ms
6.410 ms
6.435 ms
6.392 ms
6.408 ms
6.431 ms
6.396 ms
6.452 ms
6.383 ms
6.414 ms
6.491 ms
6.405 ms
6.479 ms
6.385 ms
6.433 ms
6.384 ms
6.539 ms
6.463 ms
6.419 ms
6.543 ms
6.413 ms
6.428 ms
6.379 ms
6.549 ms
6.399 ms
6.431 ms
6.551 ms
6.458 ms
6.547 ms
6.644 ms
6.506 ms
6.502 ms
6.484 ms
6.385 ms
6.427 ms
6.389 ms
6.477 ms
6.732 ms
6.712 ms
6.756 ms
6.721 ms
6.798 ms
6.735 ms
6.741 ms
6.725 ms
6.789 ms
6.736 ms
6.760 ms
6.740 ms
6.742 ms
6.623 ms
6.637 ms
6.918 ms
6.644 ms
6.641 ms
6.636 ms
6.652 ms
6.649 ms
6.672 ms
6.676 ms
6.656 ms
6.637 ms
6.692 ms
6.630 ms
6.657 ms
6.647 ms
6.629 ms
6.687 ms
6.628 ms
6.638 ms
6.665 ms
6.660 ms
6.688 ms
6.633 ms
6.685 ms
6.680 ms
6.690 ms
6.698 ms
6.644 ms
6.642 ms
6.641 ms
6.698 ms
6.691 ms
6.640 ms
6.652 ms
6.641 ms
Network path / recorded observations

Network path observations.

16 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 hop0.141 msReply RTT AS8002 · Stealth
Before

TCP traceroute / 443 · Recorded address 1

Recorded trace · destination replied


to UTC

  1. TTL 1 Probe hop0.138 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hopNo replyNo comparable RTT ASN unavailable
  3. TTL 3 Probe hopNo replyNo comparable RTT ASN unavailable
  4. TTL 4 Probe hopNo replyNo comparable RTT ASN unavailable
  5. TTL 5 Probe hopNo replyNo comparable RTT ASN unavailable
  6. TTL 6 Probe hopNo replyNo comparable RTT ASN unavailable
  7. TTL 7 Probe hopNo replyNo comparable RTT ASN unavailable
  8. TTL 8 Probe hopNo replyNo comparable RTT ASN unavailable
  9. TTL 9 Probe hopNo replyNo comparable RTT ASN unavailable
  10. TTL 10 Probe hopNo replyNo comparable RTT ASN unavailable
  11. TTL 11 Destination6.344 msReply RTT AS8075 · Microsoft
Before

ICMP traceroute · Recorded address 6

Recorded trace · destination not reached by this trace


to UTC

  1. TTL 1 Probe hop0.128 msReply RTT AS8002 · Stealth
Before

TCP traceroute / 443 · Recorded address 6

Recorded trace · destination replied


to UTC

  1. TTL 1 Probe hop0.189 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop1.087 msReply RTT ASN unavailable
  3. TTL 3 Probe hopNo replyNo comparable RTT ASN unavailable
  4. TTL 4 Probe hop118.886 msReply RTT AS8075 · Microsoft
  5. TTL 5 Probe hopNo replyNo comparable RTT ASN unavailable
  6. TTL 6 Probe hop7.812 msReply RTT AS8075 · Microsoft
  7. TTL 7 Probe hopNo replyNo comparable RTT ASN unavailable
  8. TTL 8 Probe hopNo replyNo comparable RTT ASN unavailable
  9. TTL 9 Probe hopNo replyNo comparable RTT ASN unavailable
  10. TTL 10 Probe hopNo replyNo comparable RTT ASN unavailable
  11. TTL 11 Probe hopNo replyNo comparable RTT ASN unavailable
  12. TTL 12 Destination8.624 msReply RTT AS8075 · Microsoft
During

ICMP traceroute · Recorded address 3

Recorded trace · destination not reached by this trace


to UTC

  1. TTL 1 Probe hop0.168 msReply RTT AS8002 · Stealth
During

TCP traceroute / 443 · Recorded address 3

Recorded trace · destination replied


to UTC

  1. TTL 1 Probe hop0.183 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hopNo replyNo comparable RTT ASN unavailable
  3. TTL 3 Probe hopNo replyNo comparable RTT ASN unavailable
  4. TTL 4 Probe hop6.850 msReply RTT AS8075 · Microsoft
  5. TTL 5 Probe hopNo replyNo comparable RTT ASN unavailable
  6. TTL 6 Probe hopNo replyNo comparable RTT ASN unavailable
  7. TTL 7 Probe hopNo replyNo comparable RTT ASN unavailable
  8. TTL 8 Probe hopNo replyNo comparable RTT ASN unavailable
  9. TTL 9 Probe hopNo replyNo comparable RTT ASN unavailable
  10. TTL 10 Probe hopNo replyNo comparable RTT ASN unavailable
  11. TTL 11 Destination6.511 msReply RTT AS8075 · Microsoft
During

ICMP traceroute · Recorded address 5

Recorded trace · destination not reached by this trace


to UTC

  1. TTL 1 Probe hop0.543 msReply RTT AS8002 · Stealth
During

TCP traceroute / 443 · Recorded address 5

Recorded trace · destination replied


to UTC

  1. TTL 1 Probe hop0.249 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hopNo replyNo comparable RTT ASN unavailable
  3. TTL 3 Probe hop5.496 msReply RTT AS8075 · Microsoft
  4. TTL 4 Probe hop24.470 msReply RTT AS8075 · Microsoft
  5. TTL 5 Probe hop23.567 msReply RTT AS8075 · Microsoft
  6. TTL 6 Probe hop24.765 msReply RTT AS8075 · Microsoft
  7. TTL 7 Probe hopNo replyNo comparable RTT ASN unavailable
  8. TTL 8 Probe hopNo replyNo comparable RTT ASN unavailable
  9. TTL 9 Probe hop23.691 msReply RTT AS8075 · Microsoft
  10. TTL 10 Probe hop19.882 msReply RTT AS8075 · Microsoft
  11. TTL 11 Probe hop22.932 msReply RTT AS8075 · Microsoft
  12. TTL 12 Probe hopNo replyNo comparable RTT ASN unavailable
  13. TTL 13 Destination23.100 msReply RTT AS8075 · Microsoft
During

ICMP traceroute · Recorded address 2

Recorded trace · destination not reached by this trace


to UTC

  1. TTL 1 Probe hop0.111 msReply RTT AS8002 · Stealth
During

TCP traceroute / 443 · Recorded address 2

Recorded trace · destination replied


to UTC

  1. TTL 1 Probe hop0.170 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hopNo replyNo comparable RTT ASN unavailable
  3. TTL 3 Probe hopNo replyNo comparable RTT ASN unavailable
  4. TTL 4 Probe hopNo replyNo comparable RTT ASN unavailable
  5. TTL 5 Probe hopNo replyNo comparable RTT ASN unavailable
  6. TTL 6 Probe hopNo replyNo comparable RTT ASN unavailable
  7. TTL 7 Probe hopNo replyNo comparable RTT ASN unavailable
  8. TTL 8 Probe hopNo replyNo comparable RTT ASN unavailable
  9. TTL 9 Probe hopNo replyNo comparable RTT ASN unavailable
  10. TTL 10 Probe hopNo replyNo comparable RTT ASN unavailable
  11. TTL 11 Destination9.678 msReply RTT AS8075 · Microsoft
After

ICMP traceroute · Recorded address 2

Recorded trace · destination not reached by this trace


to UTC

  1. TTL 1 Probe hop0.216 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop31.666 msReply RTT AS8075 · Microsoft
After

TCP traceroute / 443 · Recorded address 2

Recorded trace · destination replied


to UTC

  1. TTL 1 Probe hop0.157 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hopNo replyNo comparable RTT ASN unavailable
  3. TTL 3 Probe hopNo replyNo comparable RTT ASN unavailable
  4. TTL 4 Probe hop6.907 msReply RTT AS8075 · Microsoft
  5. TTL 5 Probe hopNo replyNo comparable RTT ASN unavailable
  6. TTL 6 Probe hop7.004 msReply RTT AS8075 · Microsoft
  7. TTL 7 Probe hopNo replyNo comparable RTT ASN unavailable
  8. TTL 8 Probe hopNo replyNo comparable RTT ASN unavailable
  9. TTL 9 Probe hopNo replyNo comparable RTT ASN unavailable
  10. TTL 10 Probe hopNo replyNo comparable RTT ASN unavailable
  11. TTL 11 Destination6.683 msReply RTT AS8075 · Microsoft
After

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 hop6.501 msReply RTT ASN unavailable
  3. TTL 3 Probe hop15.659 msReply RTT AS8075 · Microsoft
After

TCP traceroute / 443 · Recorded address 2

Recorded trace · destination replied


to UTC

  1. TTL 1 Probe hop0.155 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hopNo replyNo comparable RTT ASN unavailable
  3. TTL 3 Probe hopNo replyNo comparable RTT ASN unavailable
  4. TTL 4 Probe hopNo replyNo comparable RTT ASN unavailable
  5. TTL 5 Probe hopNo replyNo comparable RTT ASN unavailable
  6. TTL 6 Probe hopNo replyNo comparable RTT ASN unavailable
  7. TTL 7 Probe hopNo replyNo comparable RTT ASN unavailable
  8. TTL 8 Probe hopNo replyNo comparable RTT ASN unavailable
  9. TTL 9 Probe hopNo replyNo comparable RTT ASN unavailable
  10. TTL 10 Probe hopNo replyNo comparable RTT ASN unavailable
  11. TTL 11 Destination6.395 msReply RTT AS8075 · Microsoft
After

ICMP traceroute · Recorded address 4

Recorded trace · destination not reached by this trace


to UTC

  1. TTL 1 Probe hop0.120 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.991 msReply RTT AS8075 · Microsoft
After

TCP traceroute / 443 · Recorded address 4

Recorded trace · destination replied


to UTC

  1. TTL 1 Probe hop0.198 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hopNo replyNo comparable RTT ASN unavailable
  3. TTL 3 Probe hopNo replyNo comparable RTT ASN unavailable
  4. TTL 4 Probe hop8.022 msReply RTT AS8075 · Microsoft
  5. TTL 5 Probe hopNo replyNo comparable RTT ASN unavailable
  6. TTL 6 Probe hop7.337 msReply RTT AS8075 · Microsoft
  7. TTL 7 Probe hopNo replyNo comparable RTT ASN unavailable
  8. TTL 8 Probe hopNo replyNo comparable RTT ASN unavailable
  9. TTL 9 Probe hopNo replyNo comparable RTT ASN unavailable
  10. TTL 10 Probe hopNo replyNo comparable RTT ASN unavailable
  11. TTL 11 Probe hopNo replyNo comparable RTT ASN unavailable
  12. TTL 12 Destination6.973 msReply RTT AS8075 · Microsoft

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.

No same-address, same-method pair is available among the selected replay samples. This does not mean no other matching traces were recorded.

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.

Possible SLA event. 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.
  • The measured destination address changed across the comparison period.

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 RTT6.765 msUsual round trip before the event
Last recorded event RTT6.414 msLast successful event recording
Event p95 RTT22.897 ms95th percentile of successful recordings
Change from baseline-0.351 msLast event RTT compared with the baseline
Successful / expected recordings150 / 150Recorded 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