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Root cause analysis / Investigation

chatgpt.com

Reference RCA-E12620F60571F5C4

OpenAI 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

09 Nov 2026 13:25 – 09 Nov 2026 21:29 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
1.236 ms
1.571 ms
1.571 ms
1.640 ms
1.152 ms
1.118 ms
1.150 ms
1.151 ms
1.351 ms
1.134 ms
1.138 ms
1.130 ms
9.361 ms
1.160 ms
1.854 ms
1.183 ms
1.680 ms
1.148 ms
1.712 ms
1.123 ms
1.124 ms
1.597 ms
1.205 ms
1.560 ms
1.148 ms
1.176 ms
1.571 ms
1.599 ms
1.596 ms
1.589 ms
1.160 ms
1.571 ms
1.153 ms
1.223 ms
1.730 ms
1.566 ms
1.609 ms
1.138 ms
1.593 ms
1.623 ms
1.658 ms
1.134 ms
1.664 ms
1.583 ms
1.148 ms
1.132 ms
1.569 ms
1.123 ms
1.651 ms
1.567 ms
11.275 ms
1.165 ms
1.562 ms
1.554 ms
1.575 ms
1.574 ms
1.143 ms
1.163 ms
1.626 ms
1.592 ms
1.150 ms
1.569 ms
1.563 ms
4.718 ms
1.622 ms
1.571 ms
1.675 ms
1.575 ms
1.563 ms
1.583 ms
1.666 ms
1.600 ms
1.126 ms
1.856 ms
1.196 ms
1.107 ms
1.665 ms
1.124 ms
1.155 ms
1.156 ms
11.715 ms
1.153 ms
1.600 ms
1.159 ms
1.603 ms
1.546 ms
1.163 ms
1.606 ms
1.148 ms
1.129 ms
1.163 ms
1.610 ms
1.179 ms
1.145 ms
1.551 ms
1.127 ms
1.634 ms
19.246 ms
19.119 ms
1.637 ms
1.664 ms
1.569 ms
1.158 ms
1.118 ms
1.582 ms
1.178 ms
1.172 ms
1.153 ms
1.575 ms
1.231 ms
1.588 ms
1.950 ms
1.578 ms
1.670 ms
1.600 ms
1.614 ms
1.820 ms
1.274 ms
1.191 ms
1.139 ms
1.152 ms
1.144 ms
1.150 ms
2.237 ms
1.194 ms
1.234 ms
1.615 ms
1.589 ms
1.582 ms
15.199 ms
1.630 ms
1.578 ms
7.813 ms
1.541 ms
1.137 ms
1.270 ms
1.562 ms
1.169 ms
1.956 ms
1.956 ms
1.151 ms
1.653 ms
1.206 ms
1.618 ms
1.633 ms
1.644 ms
1.579 ms
1.578 ms
1.632 ms
1.586 ms
1.607 ms
1.700 ms
1.613 ms
1.572 ms
1.179 ms
1.581 ms
1.603 ms
1.689 ms
1.162 ms
1.613 ms
5.338 ms
1.587 ms
1.613 ms
1.628 ms
1.170 ms
1.599 ms
1.733 ms
19.692 ms
1.720 ms
1.719 ms
1.134 ms
1.573 ms
20.259 ms
1.146 ms
1.681 ms
1.566 ms
1.390 ms
1.657 ms
1.295 ms
1.624 ms
1.592 ms
1.630 ms
1.567 ms
1.589 ms
1.635 ms
1.601 ms
1.180 ms
18.071 ms
1.623 ms
13.995 ms
1.659 ms
19.223 ms
1.659 ms
1.117 ms
1.602 ms
18.237 ms
1.719 ms
1.599 ms
1.641 ms
1.121 ms
1.189 ms
1.588 ms
1.608 ms
1.624 ms
1.235 ms
1.582 ms
1.152 ms
1.126 ms
1.582 ms
3.082 ms
19.545 ms
1.657 ms
19.390 ms
1.200 ms
1.630 ms
1.691 ms
4.835 ms
3.582 ms
1.648 ms
4.338 ms
1.124 ms
1.571 ms
1.617 ms
1.733 ms
1.118 ms
1.632 ms
1.621 ms
1.162 ms
1.570 ms
1.119 ms
1.128 ms
1.563 ms
1.596 ms
1.148 ms
1.174 ms
1.134 ms
1.614 ms
1.163 ms
1.145 ms
1.601 ms
1.593 ms
1.157 ms
1.608 ms
1.611 ms
1.151 ms
1.585 ms
1.598 ms
1.175 ms
1.156 ms
1.659 ms
1.660 ms
1.579 ms
1.137 ms
1.142 ms
1.604 ms
11.531 ms
1.593 ms
1.595 ms
6.259 ms
1.638 ms
1.166 ms
1.742 ms
1.124 ms
1.555 ms
1.605 ms
1.597 ms
1.161 ms
1.607 ms
1.698 ms
1.167 ms
2.665 ms
1.161 ms
1.595 ms
1.242 ms
1.610 ms
1.228 ms
1.576 ms
1.650 ms
1.592 ms
1.130 ms
1.696 ms
1.609 ms
1.613 ms
1.139 ms
1.135 ms
1.563 ms
1.124 ms
1.625 ms
1.623 ms
13.535 ms
1.128 ms
1.643 ms
1.570 ms
1.554 ms
1.587 ms
1.170 ms
1.146 ms
1.130 ms
1.730 ms
1.573 ms
7.865 ms
1.145 ms
1.591 ms
1.632 ms
1.637 ms
1.576 ms
1.584 ms
1.170 ms
2.507 ms
6.515 ms
1.655 ms
1.606 ms
18.964 ms
1.586 ms
1.144 ms
1.157 ms
1.605 ms
1.594 ms
1.190 ms
1.692 ms
1.574 ms
1.625 ms
1.125 ms
1.161 ms
1.607 ms
1.140 ms
1.261 ms
1.143 ms
1.138 ms
1.600 ms
1.219 ms
1.594 ms
1.577 ms
1.172 ms
1.585 ms
1.208 ms
6.415 ms
1.122 ms
1.573 ms
1.118 ms
1.295 ms
1.585 ms
1.176 ms
1.663 ms
1.141 ms
1.205 ms
1.171 ms
1.158 ms
2.004 ms
1.563 ms
1.145 ms
1.589 ms
1.146 ms
1.563 ms
1.649 ms
1.887 ms
1.138 ms
1.136 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 hop0.273 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.190 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop1.462 msReply RTT ASN unavailable
Before

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 hop0.181 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop1.091 msReply RTT ASN unavailable
  4. TTL 4 Probe hopNo replyNo comparable RTT ASN unavailable
  5. TTL 5 Probe hop1.957 msReply RTT AS13335 · Cloudflare
  6. TTL 6 Probe hopNo replyNo comparable RTT ASN unavailable
  7. TTL 7 Destination1.321 msReply RTT AS13335 · Cloudflare
Before

ICMP traceroute · Destination 1

Comparison window · median of 15 traces


to UTC

  1. TTL 1 Stealth associated hop0.134 msMedian reply RTT15/15 replies · 100.0%ASN unavailable
  2. TTL 2 Stealth associated hop0.190 msMedian reply RTT15/15 replies · 100.0%ASN unavailable
  3. TTL 3 First responding external hop13.452 msMedian reply RTT12/15 replies · 80.0%AS13335 · Cloudflare
  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 17 traces


to UTC

  1. TTL 1 Stealth associated hop0.168 msMedian reply RTT17/17 replies · 100.0%ASN unavailable
  2. TTL 2 Stealth associated hop0.189 msMedian reply RTT17/17 replies · 100.0%ASN unavailable
  3. TTL 3 First responding external hop15.734 msMedian reply RTT9/17 replies · 52.9%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 reply1.393 msMedian reply RTT14/17 replies · 82.4%ASN unavailable
  7. TTL 7 Unidentified or changing hopUnavailableMedian reply RTTReply coverage unavailableASN unavailable
Before

ICMP traceroute · Destination 3

Comparison window · median of 15 traces


to UTC

  1. TTL 1 Stealth associated hop0.122 msMedian reply RTT15/15 replies · 100.0%ASN unavailable
  2. TTL 2 Stealth associated hop0.189 msMedian reply RTT15/15 replies · 100.0%ASN unavailable
  3. TTL 3 First responding external hop10.161 msMedian reply RTT9/15 replies · 60.0%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
Before

TCP/443 traceroute · Destination 4

Comparison window · median of 13 traces


to UTC

  1. TTL 1 Stealth associated hop0.185 msMedian reply RTT13/13 replies · 100.0%ASN unavailable
  2. TTL 2 Stealth associated hop0.186 msMedian reply RTT13/13 replies · 100.0%ASN unavailable
  3. TTL 3 First responding external hop2.952 msMedian reply RTT8/13 replies · 61.5%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 reply1.353 msMedian reply RTT9/13 replies · 69.2%ASN unavailable
  7. TTL 7 Destination reply1.963 msMedian reply RTT4/13 replies · 30.8%ASN unavailable
Before

ICMP traceroute · Recorded address 1

Recorded trace · destination not reached by this trace


to UTC

  1. TTL 1 Probe hop0.109 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.223 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop0.752 msReply RTT AS13335 · Cloudflare
Before

TCP traceroute / 443 · Recorded address 2

Recorded trace · destination replied


to UTC

  1. TTL 1 Probe hop0.185 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.666 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hopNo replyNo comparable RTT ASN unavailable
  4. TTL 4 Probe hop2.410 msReply RTT AS13335 · Cloudflare
  5. TTL 5 Probe hop2.157 msReply RTT AS13335 · Cloudflare
  6. TTL 6 Probe hopNo replyNo comparable RTT ASN unavailable
  7. TTL 7 Destination1.780 msReply RTT AS13335 · Cloudflare
Before

TCP traceroute / 443 · Recorded address 1

Recorded trace · destination replied


to UTC

  1. TTL 1 Probe hop0.165 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.214 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 hop1.874 msReply RTT AS13335 · Cloudflare
  6. TTL 6 Probe hopNo replyNo comparable RTT ASN unavailable
  7. TTL 7 Destination2.128 msReply RTT AS13335 · Cloudflare
During

ICMP traceroute · Recorded address 2

Recorded trace · destination not reached by this trace


to UTC

  1. TTL 1 Probe hop0.118 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.232 msReply RTT AS8002 · Stealth
During

TCP traceroute / 443 · Recorded address 2

Recorded trace · destination replied


to UTC

  1. TTL 1 Probe hop0.163 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.608 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 hop5.556 msReply RTT AS13335 · Cloudflare
  6. TTL 6 Probe hopNo replyNo comparable RTT ASN unavailable
  7. TTL 7 Destination1.895 msReply RTT AS13335 · Cloudflare
During

ICMP traceroute · Recorded address 2

Recorded trace · destination not reached by this trace


to UTC

  1. TTL 1 Probe hop0.250 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.224 msReply RTT AS8002 · Stealth
During

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 hop0.188 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hopNo replyNo comparable RTT ASN unavailable
  4. TTL 4 Probe hop5.432 msReply RTT AS13335 · Cloudflare
  5. TTL 5 Probe hop1.985 msReply RTT AS13335 · Cloudflare
  6. TTL 6 Probe hopNo replyNo comparable RTT ASN unavailable
  7. TTL 7 Destination6.266 msReply RTT AS13335 · Cloudflare
During

ICMP traceroute · Destination 1

Comparison window · median of 16 traces


to UTC

  1. TTL 1 Stealth associated hop0.125 msMedian reply RTT16/16 replies · 100.0%ASN unavailable
  2. TTL 2 Stealth associated hop0.187 msMedian reply RTT16/16 replies · 100.0%ASN unavailable
  3. TTL 3 First responding external hop3.568 msMedian reply RTT13/16 replies · 81.3%AS13335 · Cloudflare
  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 12 traces


to UTC

  1. TTL 1 Stealth associated hop0.156 msMedian reply RTT12/12 replies · 100.0%ASN unavailable
  2. TTL 2 Stealth associated hop0.186 msMedian reply RTT12/12 replies · 100.0%ASN unavailable
  3. TTL 3 First responding external hop9.933 msMedian reply RTT9/12 replies · 75.0%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 reply1.414 msMedian reply RTT10/12 replies · 83.3%ASN unavailable
  7. TTL 7 Unidentified or changing hopUnavailableMedian reply RTTReply coverage unavailableASN unavailable
During

ICMP traceroute · Destination 3

Comparison window · median of 14 traces


to UTC

  1. TTL 1 Stealth associated hop0.129 msMedian reply RTT14/14 replies · 100.0%ASN unavailable
  2. TTL 2 Stealth associated hop0.184 msMedian reply RTT14/14 replies · 100.0%ASN unavailable
  3. TTL 3 First responding external hop1.228 msMedian reply RTT11/14 replies · 78.6%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 18 traces


to UTC

  1. TTL 1 Stealth associated hop0.152 msMedian reply RTT18/18 replies · 100.0%ASN unavailable
  2. TTL 2 Stealth associated hop0.203 msMedian reply RTT18/18 replies · 100.0%ASN unavailable
  3. TTL 3 First responding external hop4.659 msMedian reply RTT16/18 replies · 88.9%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 reply1.366 msMedian reply RTT13/18 replies · 72.2%ASN unavailable
  7. TTL 7 Destination reply2.035 msMedian reply RTT5/18 replies · 27.8%ASN unavailable
During

ICMP traceroute · Recorded address 1

Recorded trace · destination not reached by this trace


to UTC

  1. TTL 1 Probe hop0.121 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.215 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop22.557 msReply RTT AS13335 · Cloudflare
During

TCP traceroute / 443 · Recorded address 2

Recorded trace · destination replied


to UTC

  1. TTL 1 Probe hop0.146 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.175 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop21.398 msReply RTT AS13335 · Cloudflare
  4. TTL 4 Probe hopNo replyNo comparable RTT ASN unavailable
  5. TTL 5 Probe hop8.006 msReply RTT AS13335 · Cloudflare
  6. TTL 6 Destination1.312 msReply RTT AS13335 · Cloudflare
After

ICMP traceroute · Recorded address 1

Recorded trace · destination not reached by this trace


to UTC

  1. TTL 1 Probe hop0.119 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.275 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop16.670 msReply RTT AS13335 · Cloudflare
After

TCP traceroute / 443 · Recorded address 1

Recorded trace · destination replied


to UTC

  1. TTL 1 Probe hop0.200 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.256 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop18.410 msReply RTT AS13335 · Cloudflare
  4. TTL 4 Probe hopNo replyNo comparable RTT ASN unavailable
  5. TTL 5 Probe hop1.997 msReply RTT AS13335 · Cloudflare
  6. TTL 6 Destination1.700 msReply RTT AS13335 · Cloudflare
After

ICMP traceroute · Recorded address 1

Recorded trace · destination not reached by this trace


to UTC

  1. TTL 1 Probe hop0.125 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.191 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop8.463 msReply RTT AS13335 · Cloudflare
After

TCP traceroute / 443 · Recorded address 2

Recorded trace · destination replied


to UTC

  1. TTL 1 Probe hop0.150 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.180 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop3.230 msReply RTT AS13335 · Cloudflare
  4. TTL 4 Probe hopNo replyNo comparable RTT ASN unavailable
  5. TTL 5 Probe hop1.644 msReply RTT AS13335 · Cloudflare
  6. TTL 6 Destination1.372 msReply RTT AS13335 · Cloudflare
After

ICMP traceroute · Recorded address 2

Recorded trace · destination not reached by this trace


to UTC

  1. TTL 1 Probe hop0.121 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.183 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop12.230 msReply RTT AS13335 · Cloudflare
After

TCP traceroute / 443 · Recorded address 2

Recorded trace · destination replied


to UTC

  1. TTL 1 Probe hop0.136 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.182 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop13.573 msReply RTT AS13335 · Cloudflare
  4. TTL 4 Probe hopNo replyNo comparable RTT ASN unavailable
  5. TTL 5 Probe hop2.393 msReply RTT AS13335 · Cloudflare
  6. TTL 6 Destination1.651 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
10.109 msAS8002 · Stealth0.121 msAS8002 · StealthSame responder
20.223 msAS8002 · Stealth0.215 msAS8002 · StealthSame responder
30.752 msAS13335 · Cloudflare22.557 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
10.185 msAS8002 · Stealth0.163 msAS8002 · StealthSame responder
20.666 msAS8002 · Stealth0.608 msAS8002 · StealthSame responder
3No replyNo replyNot established
42.410 msAS13335 · CloudflareNo replyNot established
52.157 msAS13335 · Cloudflare5.556 msAS13335 · CloudflareDifferent responders
6No replyNo replyNot established
71.780 msAS13335 · Cloudflare1.895 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.

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

Findings differ by destination.

Findings differ between destination comparisons. The evidence does not point to one location for the whole event.

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 RTT1.549 msUsual round trip before the event
Last recorded event RTT1.145 msLast successful event recording
Event p95 RTT17.638 ms95th percentile of successful recordings
Change from baseline-0.403 msLast event RTT compared with the baseline
Successful / expected recordings705 / 730Recorded 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