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Root cause analysis / Investigation

copilot.microsoft.com

Reference RCA-A56CA7EA007823CD

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.

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

09 Nov 2026 13:30 – 09 Nov 2026 15:59 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.
Recorded at (UTC)RTT
0.988 ms
1.436 ms
0.999 ms
0.990 ms
1.023 ms
1.191 ms
1.415 ms
0.990 ms
0.984 ms
1.410 ms
1.390 ms
1.028 ms
1.368 ms
1.070 ms
0.981 ms
1.375 ms
0.964 ms
1.029 ms
1.415 ms
1.405 ms
0.994 ms
1.339 ms
0.963 ms
1.054 ms
1.009 ms
0.974 ms
0.976 ms
1.432 ms
1.385 ms
1.202 ms
0.974 ms
1.375 ms
0.989 ms
1.066 ms
2.622 ms
1.509 ms
1.183 ms
1.031 ms
0.958 ms
0.987 ms
1.351 ms
1.089 ms
1.002 ms
0.996 ms
0.984 ms
1.376 ms
1.348 ms
0.954 ms
1.353 ms
1.010 ms
1.380 ms
1.365 ms
1.021 ms
1.028 ms
1.412 ms
2.643 ms
1.359 ms
0.926 ms
0.968 ms
0.986 ms
0.974 ms
1.026 ms
1.369 ms
1.438 ms
1.038 ms
1.388 ms
0.986 ms
1.002 ms
1.013 ms
1.044 ms
1.423 ms
1.013 ms
0.980 ms
1.431 ms
0.990 ms
1.375 ms
0.980 ms
1.020 ms
1.482 ms
1.365 ms
0.964 ms
0.966 ms
1.034 ms
1.008 ms
1.059 ms
0.950 ms
1.002 ms
1.047 ms
18.629 ms
1.396 ms
1.358 ms
0.947 ms
0.998 ms
0.990 ms
1.335 ms
1.339 ms
1.490 ms
1.424 ms
0.971 ms
0.963 ms
1.594 ms
1.443 ms
1.426 ms
1.010 ms
0.995 ms
1.012 ms
1.460 ms
6.159 ms
1.350 ms
1.009 ms
1.022 ms
1.044 ms
1.093 ms
1.079 ms
1.366 ms
0.980 ms
1.124 ms
1.397 ms
1.097 ms
1.017 ms
0.989 ms
1.815 ms
1.390 ms
1.003 ms
1.046 ms
0.980 ms
1.406 ms
14.427 ms
1.413 ms
1.037 ms
1.402 ms
0.943 ms
13.743 ms
0.962 ms
6.090 ms
18.779 ms
1.455 ms
1.014 ms
1.378 ms
1.381 ms
1.355 ms
11.103 ms
7.471 ms
1.368 ms
0.978 ms
1.020 ms
1.373 ms
17.426 ms
1.381 ms
1.445 ms
1.430 ms
2.857 ms
1.412 ms
1.412 ms
1.389 ms
1.386 ms
1.446 ms
0.989 ms
1.028 ms
1.452 ms
0.984 ms
0.974 ms
1.447 ms
1.406 ms
0.969 ms
0.992 ms
1.391 ms
1.326 ms
1.364 ms
1.558 ms
1.005 ms
1.379 ms
0.996 ms
1.090 ms
0.994 ms
1.483 ms
0.987 ms
1.392 ms
1.408 ms
1.540 ms
1.010 ms
1.393 ms
9.496 ms
2.447 ms
1.058 ms
1.066 ms
1.041 ms
1.059 ms
1.969 ms
1.438 ms
1.593 ms
1.391 ms
1.017 ms
1.408 ms
1.002 ms
1.425 ms
0.990 ms
1.500 ms
1.021 ms
1.078 ms
18.430 ms
0.984 ms
0.994 ms
0.997 ms
11.541 ms
1.235 ms
1.385 ms
1.004 ms
1.404 ms
1.003 ms
1.035 ms
1.440 ms
0.991 ms
1.758 ms
0.995 ms
1.003 ms
1.069 ms
15.034 ms
1.387 ms
13.835 ms
1.029 ms
1.060 ms
1.050 ms
1.126 ms
0.960 ms
0.952 ms
1.390 ms
1.044 ms
1.374 ms
1.394 ms
1.263 ms
1.382 ms
0.994 ms
1.423 ms
1.426 ms
1.420 ms
1.426 ms
14.455 ms
1.474 ms
1.500 ms
0.994 ms
18.646 ms
13.723 ms
1.001 ms
1.025 ms
0.982 ms
0.968 ms
4.231 ms
1.380 ms
16.715 ms
1.470 ms
1.011 ms
11.063 ms
16.451 ms
1.408 ms
1.020 ms
5.320 ms
0.986 ms
0.977 ms
3.128 ms
1.422 ms
17.812 ms
1.002 ms
1.362 ms
19.391 ms
1.388 ms
1.365 ms
1.063 ms
15.853 ms
13.746 ms
0.957 ms
1.042 ms
1.010 ms
1.404 ms
1.367 ms
1.015 ms
13.635 ms
0.988 ms
11.114 ms
11.144 ms
1.453 ms
1.416 ms
1.013 ms
1.036 ms
1.487 ms
11.998 ms
9.749 ms
0.953 ms
1.423 ms
1.063 ms
15.410 ms
1.008 ms
8.988 ms
1.052 ms
1.143 ms
1.505 ms
1.361 ms
1.007 ms
1.424 ms
Network path / recorded observations

Network path observations.

25 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
  2. TTL 2 Probe hop0.320 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop6.705 msReply RTT AS13335 · Cloudflare
Before

TCP traceroute / 443 · Recorded address 1

Recorded trace · destination replied


to UTC

  1. TTL 1 Probe hop0.141 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.188 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop4.201 msReply RTT AS13335 · Cloudflare
  4. TTL 4 Probe hop6.770 msReply RTT AS13335 · Cloudflare
  5. TTL 5 Probe hop1.807 msReply RTT AS13335 · Cloudflare
  6. TTL 6 Destination1.332 msReply RTT AS13335 · Cloudflare
Before

ICMP traceroute · Destination 1

Comparison window · median of 18 traces


to UTC

  1. TTL 1 Stealth associated hop0.137 msMedian reply RTT18/18 replies · 100.0%ASN unavailable
  2. TTL 2 Stealth associated hop0.186 msMedian reply RTT18/18 replies · 100.0%ASN unavailable
  3. TTL 3 First responding external hop5.255 msMedian reply RTT12/18 replies · 66.7%ASN unavailable
  4. TTL 4 Unidentified or changing hopUnavailableMedian reply RTTReply coverage unavailableASN unavailable
  5. TTL 5 Unidentified or changing hopUnavailableMedian reply RTTReply coverage unavailableASN unavailable
  6. TTL 6 Unidentified or changing hopUnavailableMedian reply RTTReply coverage unavailableASN unavailable
Before

TCP/443 traceroute · Destination 2

Comparison window · median of 20 traces


to UTC

  1. TTL 1 Stealth associated hop0.167 msMedian reply RTT20/20 replies · 100.0%ASN unavailable
  2. TTL 2 Stealth associated hop0.186 msMedian reply RTT20/20 replies · 100.0%ASN unavailable
  3. TTL 3 First responding external hop3.629 msMedian reply RTT13/20 replies · 65.0%ASN unavailable
  4. TTL 4 Unidentified or changing hopUnavailableMedian reply RTTReply coverage unavailableASN unavailable
  5. TTL 5 Unidentified or changing hopUnavailableMedian reply RTTReply coverage unavailableASN unavailable
  6. TTL 6 Destination reply1.264 msMedian reply RTT15/20 replies · 75.0%ASN unavailable
  7. TTL 7 Unidentified or changing hopUnavailableMedian reply RTTReply coverage unavailableASN unavailable
Before

ICMP traceroute · Destination 3

Comparison window · median of 12 traces


to UTC

  1. TTL 1 Stealth associated hop0.142 msMedian reply RTT12/12 replies · 100.0%ASN unavailable
  2. TTL 2 Stealth associated hop0.188 msMedian reply RTT12/12 replies · 100.0%ASN unavailable
  3. TTL 3 First responding external hop5.311 msMedian reply RTT5/12 replies · 41.7%ASN unavailable
  4. TTL 4 Unidentified or changing hopUnavailableMedian reply RTTReply coverage unavailableASN unavailable
  5. TTL 5 Unidentified or changing hopUnavailableMedian reply RTTReply coverage unavailableASN unavailable
  6. TTL 6 Unidentified or changing hopUnavailableMedian reply RTTReply coverage unavailableASN unavailable
Before

TCP/443 traceroute · Destination 4

Comparison window · median of 10 traces


to UTC

  1. TTL 1 Stealth associated hop0.165 msMedian reply RTT10/10 replies · 100.0%ASN unavailable
  2. TTL 2 Stealth associated hop0.189 msMedian reply RTT10/10 replies · 100.0%ASN unavailable
  3. TTL 3 First responding external hop1.400 msMedian reply RTT3/10 replies · 30.0%ASN unavailable
  4. TTL 4 Unidentified or changing hopUnavailableMedian reply RTTReply coverage unavailableASN unavailable
  5. TTL 5 Unidentified or changing hopUnavailableMedian reply RTTReply coverage unavailableASN unavailable
  6. TTL 6 Destination reply1.357 msMedian reply RTT10/10 replies · 100.0%ASN unavailable
  7. TTL 7 Unidentified or changing hopUnavailableMedian reply RTTReply coverage unavailableASN unavailable
Before

ICMP traceroute · Recorded address 2

Recorded trace · destination not reached by this trace


to UTC

  1. TTL 1 Probe hop0.113 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.198 msReply RTT AS8002 · Stealth
Before

TCP traceroute / 443 · Recorded address 2

Recorded trace · destination replied


to UTC

  1. TTL 1 Probe hop0.175 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.180 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 hop1.991 msReply RTT AS13335 · Cloudflare
  6. TTL 6 Destination1.190 msReply RTT AS13335 · Cloudflare
During

ICMP traceroute · Destination 1

Comparison window · median of 10 traces


to UTC

  1. TTL 1 Stealth associated hop0.132 msMedian reply RTT10/10 replies · 100.0%ASN unavailable
  2. TTL 2 Stealth associated hop0.183 msMedian reply RTT10/10 replies · 100.0%ASN unavailable
  3. TTL 3 First responding external hop1.753 msMedian reply RTT5/10 replies · 50.0%ASN unavailable
  4. TTL 4 Unidentified or changing hopUnavailableMedian reply RTTReply coverage unavailableASN unavailable
  5. TTL 5 Unidentified or changing hopUnavailableMedian reply RTTReply coverage unavailableASN unavailable
  6. TTL 6 Unidentified or changing hopUnavailableMedian reply RTTReply coverage unavailableASN unavailable
During

TCP/443 traceroute · Destination 2

Comparison window · median of 19 traces


to UTC

  1. TTL 1 Stealth associated hop0.169 msMedian reply RTT19/19 replies · 100.0%ASN unavailable
  2. TTL 2 Stealth associated hop0.205 msMedian reply RTT19/19 replies · 100.0%ASN unavailable
  3. TTL 3 First responding external hop1.712 msMedian reply RTT9/19 replies · 47.4%ASN unavailable
  4. TTL 4 Unidentified or changing hopUnavailableMedian reply RTTReply coverage unavailableASN unavailable
  5. TTL 5 Unidentified or changing hopUnavailableMedian reply RTTReply coverage unavailableASN unavailable
  6. TTL 6 Destination reply1.270 msMedian reply RTT19/19 replies · 100.0%ASN unavailable
  7. TTL 7 Unidentified or changing hopUnavailableMedian reply RTTReply coverage unavailableASN unavailable
During

ICMP traceroute · Destination 3

Comparison window · median of 20 traces


to UTC

  1. TTL 1 Stealth associated hop0.135 msMedian reply RTT20/20 replies · 100.0%ASN unavailable
  2. TTL 2 Stealth associated hop0.187 msMedian reply RTT20/20 replies · 100.0%ASN unavailable
  3. TTL 3 First responding external hop1.721 msMedian reply RTT11/20 replies · 55.0%ASN unavailable
  4. TTL 4 Unidentified or changing hopUnavailableMedian reply RTTReply coverage unavailableASN unavailable
  5. TTL 5 Unidentified or changing hopUnavailableMedian reply RTTReply coverage unavailableASN unavailable
  6. TTL 6 Unidentified or changing hopUnavailableMedian reply RTTReply coverage unavailableASN unavailable
During

TCP/443 traceroute · Destination 4

Comparison window · median of 11 traces


to UTC

  1. TTL 1 Stealth associated hop0.162 msMedian reply RTT11/11 replies · 100.0%ASN unavailable
  2. TTL 2 Stealth associated hop0.183 msMedian reply RTT11/11 replies · 100.0%ASN unavailable
  3. TTL 3 First responding external hop13.686 msMedian reply RTT4/11 replies · 36.4%ASN unavailable
  4. TTL 4 Unidentified or changing hopUnavailableMedian reply RTTReply coverage unavailableASN unavailable
  5. TTL 5 Unidentified or changing hopUnavailableMedian reply RTTReply coverage unavailableASN unavailable
  6. TTL 6 Destination reply1.276 msMedian reply RTT10/11 replies · 90.9%ASN unavailable
  7. TTL 7 Unidentified or changing hopUnavailableMedian reply RTTReply coverage unavailableASN unavailable
Before

TCP traceroute / 443 · Recorded address 2

Recorded trace · destination replied


to UTC

  1. TTL 1 Probe hop0.165 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.182 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hopNo replyNo comparable RTT ASN unavailable
  4. TTL 4 Probe hop13.342 msReply RTT AS13335 · Cloudflare
  5. TTL 5 Probe hop2.002 msReply RTT AS13335 · Cloudflare
  6. TTL 6 Probe hopNo replyNo comparable RTT ASN unavailable
  7. TTL 7 Destination1.663 msReply RTT AS13335 · Cloudflare
During

ICMP traceroute · Recorded address 2

Recorded trace · destination not reached by this trace


to UTC

  1. TTL 1 Probe hop0.132 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.209 msReply RTT AS8002 · Stealth
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 hop0.201 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 hop2.859 msReply RTT AS13335 · Cloudflare
  6. TTL 6 Destination1.373 msReply RTT AS13335 · Cloudflare
During

ICMP traceroute · Recorded address 2

Recorded trace · destination not reached by this trace


to UTC

  1. TTL 1 Probe hop0.126 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.186 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop1.726 msReply RTT AS13335 · Cloudflare
During

TCP traceroute / 443 · Recorded address 2

Recorded trace · destination replied


to UTC

  1. TTL 1 Probe hop0.168 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.179 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop0.617 msReply RTT AS13335 · Cloudflare
  4. TTL 4 Probe hopNo replyNo comparable RTT ASN unavailable
  5. TTL 5 Probe hop2.341 msReply RTT AS13335 · Cloudflare
  6. TTL 6 Destination1.321 msReply RTT AS13335 · Cloudflare
During

ICMP traceroute · Recorded address 2

Recorded trace · destination not reached by this trace


to UTC

  1. TTL 1 Probe hop0.145 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.193 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop6.746 msReply RTT AS13335 · Cloudflare
During

TCP traceroute / 443 · Recorded address 1

Recorded trace · destination replied


to UTC

  1. TTL 1 Probe hop0.178 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.183 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop2.051 msReply RTT AS13335 · Cloudflare
  4. TTL 4 Probe hopNo replyNo comparable RTT ASN unavailable
  5. TTL 5 Probe hop1.593 msReply RTT AS13335 · Cloudflare
  6. TTL 6 Destination1.332 msReply RTT AS13335 · Cloudflare
After

ICMP traceroute · Recorded address 1

Recorded trace · destination not reached by this trace


to UTC

  1. TTL 1 Probe hop0.186 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.182 msReply RTT AS8002 · Stealth
After

TCP traceroute / 443 · Recorded address 2

Recorded trace · destination replied


to UTC

  1. TTL 1 Probe hop0.149 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.196 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hopNo replyNo comparable RTT ASN unavailable
  4. TTL 4 Probe hop1.911 msReply RTT AS13335 · Cloudflare
  5. TTL 5 Probe hop2.057 msReply RTT AS13335 · Cloudflare
  6. TTL 6 Destination0.915 msReply RTT AS13335 · Cloudflare
After

ICMP traceroute · Recorded address 1

Recorded trace · destination not reached by this trace


to UTC

  1. TTL 1 Probe hop0.114 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.172 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop0.973 msReply RTT AS13335 · Cloudflare
After

TCP traceroute / 443 · Recorded address 2

Recorded trace · destination replied


to UTC

  1. TTL 1 Probe hop0.143 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.190 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop1.519 msReply RTT AS13335 · Cloudflare
  4. TTL 4 Probe hopNo replyNo comparable RTT ASN unavailable
  5. TTL 5 Probe hop2.364 msReply RTT AS13335 · Cloudflare
  6. TTL 6 Probe hopNo replyNo comparable RTT ASN unavailable
  7. TTL 7 Destination1.834 msReply RTT AS13335 · Cloudflare
After

ICMP traceroute · Recorded address 2

Recorded trace · destination not reached by this trace


to UTC

  1. TTL 1 Probe hop0.125 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.180 msReply RTT AS8002 · Stealth
After

TCP traceroute / 443 · Recorded address 1

Recorded trace · destination replied


to UTC

  1. TTL 1 Probe hop0.152 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.690 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 hop1.881 msReply RTT AS13335 · Cloudflare
  6. TTL 6 Probe hopNo replyNo comparable RTT ASN unavailable
  7. TTL 7 Destination8.710 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 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
10.113 msAS8002 · Stealth0.132 msAS8002 · StealthSame responder
20.198 msAS8002 · Stealth0.209 msAS8002 · StealthSame 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
10.141 msAS8002 · Stealth0.142 msAS8002 · StealthSame responder
20.188 msAS8002 · Stealth0.201 msAS8002 · StealthSame responder
34.201 msAS13335 · CloudflareNo replyNot established
46.770 msAS13335 · CloudflareNo replyNot established
51.807 msAS13335 · Cloudflare2.859 msAS13335 · CloudflareDifferent responders
61.332 msAS13335 · Cloudflare1.373 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
10.165 msAS8002 · Stealth0.168 msAS8002 · StealthSame responder
20.182 msAS8002 · Stealth0.179 msAS8002 · StealthSame responder
3No reply0.617 msAS13335 · CloudflareNot established
413.342 msAS13335 · CloudflareNo replyNot established
52.002 msAS13335 · Cloudflare2.341 msAS13335 · CloudflareDifferent responders
6No reply1.321 msAS13335 · CloudflareNot established
71.663 msAS13335 · CloudflareNot recordedNot established

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

Stealth replies stable; external replies varied.

Sampled Stealth associated replies stayed within the comparison limits while external replies varied. The external path, destination and return path remain areas to investigate.

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 RTT1.071 msUsual round trip before the event
Last recorded event RTT1.540 msLast successful event recording
Event p95 RTT13.777 ms95th percentile of successful recordings
Change from baseline+0.469 msLast event RTT compared with the baseline
Successful / expected recordings60 / 60Recorded 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