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Root cause analysis / Investigation

api.perplexity.ai

Reference RCA-1702189B28D9E1BB

Perplexity 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

09 Nov 2026 12:50 – 09 Nov 2026 20:49 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
1.314 ms
1.377 ms
1.286 ms
1.363 ms
1.144 ms
1.155 ms
1.283 ms
1.282 ms
1.303 ms
1.120 ms
1.319 ms
1.301 ms
1.290 ms
1.067 ms
1.067 ms
1.420 ms
10.322 ms
1.116 ms
1.083 ms
1.290 ms
1.433 ms
1.283 ms
1.419 ms
1.117 ms
1.080 ms
1.280 ms
1.131 ms
1.506 ms
1.104 ms
1.088 ms
1.552 ms
1.311 ms
1.366 ms
1.078 ms
1.327 ms
1.174 ms
1.353 ms
1.070 ms
1.129 ms
1.295 ms
1.322 ms
1.112 ms
1.376 ms
1.367 ms
1.098 ms
1.280 ms
1.092 ms
1.070 ms
1.341 ms
1.329 ms
1.249 ms
3.375 ms
1.180 ms
1.295 ms
1.328 ms
1.078 ms
1.076 ms
1.093 ms
1.343 ms
1.361 ms
1.133 ms
1.306 ms
1.408 ms
1.310 ms
1.248 ms
1.135 ms
1.300 ms
1.289 ms
1.069 ms
1.080 ms
1.304 ms
1.406 ms
1.338 ms
1.413 ms
1.142 ms
1.085 ms
1.133 ms
1.044 ms
1.300 ms
1.119 ms
1.459 ms
1.079 ms
1.371 ms
1.138 ms
1.127 ms
1.342 ms
1.388 ms
1.300 ms
1.293 ms
1.288 ms
1.064 ms
1.115 ms
1.094 ms
1.045 ms
1.150 ms
1.102 ms
1.056 ms
1.178 ms
1.293 ms
1.306 ms
1.341 ms
1.324 ms
1.076 ms
1.153 ms
1.090 ms
1.089 ms
1.079 ms
1.348 ms
1.357 ms
1.289 ms
2.074 ms
1.282 ms
1.090 ms
1.140 ms
1.369 ms
1.332 ms
1.285 ms
1.302 ms
1.136 ms
1.134 ms
1.117 ms
1.382 ms
1.289 ms
1.057 ms
1.373 ms
1.144 ms
1.307 ms
1.068 ms
7.803 ms
1.112 ms
1.091 ms
1.063 ms
1.091 ms
1.052 ms
1.317 ms
1.089 ms
1.370 ms
10.281 ms
1.139 ms
1.312 ms
1.311 ms
1.055 ms
12.495 ms
1.371 ms
1.293 ms
1.061 ms
1.332 ms
1.276 ms
1.406 ms
1.303 ms
13.013 ms
14.180 ms
1.162 ms
1.280 ms
1.436 ms
1.065 ms
18.156 ms
1.356 ms
1.055 ms
1.092 ms
1.414 ms
1.297 ms
1.120 ms
18.848 ms
1.145 ms
1.379 ms
1.100 ms
1.353 ms
16.048 ms
1.293 ms
14.201 ms
9.142 ms
1.309 ms
1.415 ms
1.333 ms
13.480 ms
4.211 ms
1.315 ms
6.661 ms
1.467 ms
6.981 ms
1.368 ms
8.064 ms
1.348 ms
8.311 ms
1.080 ms
18.966 ms
1.122 ms
1.110 ms
3.407 ms
1.302 ms
1.084 ms
1.305 ms
1.336 ms
1.324 ms
1.455 ms
1.379 ms
15.920 ms
4.208 ms
1.050 ms
1.348 ms
19.246 ms
9.120 ms
1.378 ms
19.563 ms
1.319 ms
15.176 ms
1.323 ms
1.315 ms
19.812 ms
1.094 ms
1.377 ms
15.105 ms
1.341 ms
5.884 ms
1.376 ms
1.315 ms
16.981 ms
1.108 ms
1.316 ms
1.145 ms
1.251 ms
1.169 ms
1.295 ms
1.354 ms
1.375 ms
1.293 ms
1.306 ms
1.297 ms
1.278 ms
1.058 ms
1.303 ms
1.293 ms
2.609 ms
1.113 ms
1.130 ms
1.490 ms
1.421 ms
1.106 ms
1.370 ms
1.346 ms
1.422 ms
1.380 ms
1.333 ms
1.061 ms
1.062 ms
10.544 ms
1.446 ms
1.136 ms
1.294 ms
2.193 ms
1.100 ms
1.409 ms
1.068 ms
1.092 ms
1.462 ms
1.363 ms
1.113 ms
1.277 ms
1.348 ms
1.085 ms
1.299 ms
1.115 ms
1.187 ms
1.110 ms
1.345 ms
1.404 ms
1.341 ms
1.356 ms
1.278 ms
1.130 ms
1.063 ms
1.118 ms
1.354 ms
1.415 ms
1.088 ms
1.334 ms
11.872 ms
1.062 ms
1.343 ms
1.182 ms
1.333 ms
1.046 ms
1.273 ms
1.340 ms
1.349 ms
19.289 ms
1.473 ms
1.090 ms
1.293 ms
1.116 ms
1.371 ms
1.167 ms
1.626 ms
1.071 ms
1.103 ms
1.414 ms
1.342 ms
1.282 ms
1.072 ms
1.457 ms
1.346 ms
1.317 ms
1.341 ms
1.425 ms
1.644 ms
1.367 ms
1.320 ms
1.044 ms
1.307 ms
1.290 ms
1.401 ms
1.090 ms
1.059 ms
1.047 ms
1.316 ms
1.075 ms
1.348 ms
1.191 ms
1.136 ms
1.322 ms
1.559 ms
1.406 ms
1.126 ms
1.181 ms
1.296 ms
1.126 ms
1.195 ms
1.366 ms
1.325 ms
1.183 ms
1.306 ms
1.278 ms
1.164 ms
1.534 ms
1.152 ms
1.341 ms
1.327 ms
1.124 ms
1.342 ms
1.405 ms
1.080 ms
1.112 ms
1.579 ms
1.083 ms
1.384 ms
1.417 ms
1.304 ms
1.072 ms
1.342 ms
1.433 ms
1.093 ms
1.075 ms
1.072 ms
1.112 ms
1.381 ms
1.430 ms
1.142 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 2

Recorded trace · destination not reached by this trace


to UTC

  1. TTL 1 Probe hop0.153 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.184 msReply RTT AS8002 · Stealth
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 hop0.176 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 hop2.012 msReply RTT AS13335 · Cloudflare
  6. TTL 6 Destination1.399 msReply RTT AS13335 · Cloudflare
Before

ICMP traceroute · Destination 1

Comparison window · median of 17 traces


to UTC

  1. TTL 1 Stealth associated hop0.145 msMedian reply RTT17/17 replies · 100.0%ASN unavailable
  2. TTL 2 Stealth associated hop0.186 msMedian reply RTT17/17 replies · 100.0%ASN unavailable
  3. TTL 3 First responding external hop1.530 msMedian reply RTT12/17 replies · 70.6%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 16 traces


to UTC

  1. TTL 1 Stealth associated hop0.171 msMedian reply RTT16/16 replies · 100.0%ASN unavailable
  2. TTL 2 Stealth associated hop0.227 msMedian reply RTT16/16 replies · 100.0%ASN unavailable
  3. TTL 3 First responding external hop2.283 msMedian reply RTT13/16 replies · 81.3%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 reply1.400 msMedian reply RTT13/16 replies · 81.3%ASN unavailable
  7. TTL 7 Unidentified or changing hopUnavailableMedian reply RTTReply coverage unavailableASN unavailable
Before

ICMP traceroute · Destination 3

Comparison window · median of 13 traces


to UTC

  1. TTL 1 Stealth associated hop0.130 msMedian reply RTT13/13 replies · 100.0%ASN unavailable
  2. TTL 2 Stealth associated hop0.189 msMedian reply RTT13/13 replies · 100.0%ASN unavailable
  3. TTL 3 First responding external hop1.729 msMedian reply RTT13/13 replies · 100.0%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 14 traces


to UTC

  1. TTL 1 Stealth associated hop0.176 msMedian reply RTT14/14 replies · 100.0%ASN unavailable
  2. TTL 2 Stealth associated hop0.191 msMedian reply RTT14/14 replies · 100.0%ASN unavailable
  3. TTL 3 First responding external hop1.341 msMedian reply RTT10/14 replies · 71.4%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 reply1.238 msMedian reply RTT12/14 replies · 85.7%ASN unavailable
  7. TTL 7 Unidentified or changing hopUnavailableMedian reply RTTReply coverage unavailableASN unavailable
Before

ICMP traceroute · Recorded address 2

Recorded trace · destination replied


to UTC

  1. TTL 1 Probe hop0.129 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.185 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop0.946 msReply RTT ASN unavailable
  4. TTL 4 Probe hop1.594 msReply RTT AS13335 · Cloudflare
  5. TTL 5 Probe hop2.086 msReply RTT AS13335 · Cloudflare
  6. TTL 6 Destination1.376 msReply RTT AS13335 · Cloudflare
Before

TCP traceroute / 443 · Recorded address 1

Recorded trace · destination replied


to UTC

  1. TTL 1 Probe hop0.156 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.207 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop2.095 msReply RTT ASN unavailable
  4. TTL 4 Probe hopNo replyNo comparable RTT ASN unavailable
  5. TTL 5 Probe hop2.743 msReply RTT AS13335 · Cloudflare
  6. TTL 6 Destination1.541 msReply RTT AS13335 · Cloudflare
Before

TCP traceroute / 443 · Recorded address 1

Recorded trace · destination replied


to UTC

  1. TTL 1 Probe hop0.217 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.708 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop31.860 msReply RTT ASN unavailable
  4. TTL 4 Probe hopNo replyNo comparable RTT ASN unavailable
  5. TTL 5 Probe hop3.343 msReply RTT AS13335 · Cloudflare
  6. TTL 6 Destination1.009 msReply RTT AS13335 · Cloudflare
During

ICMP traceroute · Recorded address 1

Recorded trace · destination not reached by this trace


to UTC

  1. TTL 1 Probe hop0.131 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.185 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop0.655 msReply RTT ASN unavailable
During

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 hop0.182 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop1.858 msReply RTT ASN unavailable
  4. TTL 4 Probe hopNo replyNo comparable RTT ASN unavailable
  5. TTL 5 Probe hop6.798 msReply RTT AS13335 · Cloudflare
  6. TTL 6 Probe hopNo replyNo comparable RTT ASN unavailable
  7. TTL 7 Destination1.961 msReply RTT AS13335 · Cloudflare
During

ICMP traceroute · Recorded address 2

Recorded trace · destination not reached by this trace


to UTC

  1. TTL 1 Probe hop0.129 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.185 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop2.797 msReply RTT AS13335 · Cloudflare
During

TCP traceroute / 443 · Recorded address 1

Recorded trace · destination replied


to UTC

  1. TTL 1 Probe hop0.134 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.175 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop1.608 msReply RTT AS13335 · Cloudflare
  4. TTL 4 Probe hopNo replyNo comparable RTT ASN unavailable
  5. TTL 5 Probe hop1.966 msReply RTT AS13335 · Cloudflare
  6. TTL 6 Destination1.349 msReply RTT AS13335 · Cloudflare
During

ICMP traceroute · Destination 1

Comparison window · median of 12 traces


to UTC

  1. TTL 1 Stealth associated hop0.130 msMedian reply RTT12/12 replies · 100.0%ASN unavailable
  2. TTL 2 Stealth associated hop0.183 msMedian reply RTT12/12 replies · 100.0%ASN unavailable
  3. TTL 3 First responding external hop3.074 msMedian reply RTT8/12 replies · 66.7%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 19 traces


to UTC

  1. TTL 1 Stealth associated hop0.200 msMedian reply RTT19/19 replies · 100.0%ASN unavailable
  2. TTL 2 Stealth associated hop0.197 msMedian reply RTT19/19 replies · 100.0%ASN unavailable
  3. TTL 3 First responding external hop13.276 msMedian reply RTT11/19 replies · 57.9%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 reply1.369 msMedian reply RTT17/19 replies · 89.5%ASN unavailable
  7. TTL 7 Unidentified or changing hopUnavailableMedian reply RTTReply coverage unavailableASN unavailable
During

ICMP traceroute · Destination 3

Comparison window · median of 18 traces


to UTC

  1. TTL 1 Stealth associated hop0.132 msMedian reply RTT18/18 replies · 100.0%ASN unavailable
  2. TTL 2 Stealth associated hop0.194 msMedian reply RTT18/18 replies · 100.0%ASN unavailable
  3. TTL 3 First responding external hop12.712 msMedian reply RTT7/18 replies · 38.9%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 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 hop0.153 msMedian reply RTT11/11 replies · 100.0%ASN unavailable
  2. TTL 2 Stealth associated hop0.194 msMedian reply RTT11/11 replies · 100.0%ASN unavailable
  3. TTL 3 First responding external hop6.873 msMedian reply RTT5/11 replies · 45.5%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 reply1.336 msMedian reply RTT8/11 replies · 72.7%ASN unavailable
  7. TTL 7 Unidentified or changing hopUnavailableMedian reply RTTReply coverage unavailableASN unavailable
During

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 hop0.178 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop0.880 msReply RTT AS13335 · Cloudflare
During

TCP traceroute / 443 · Recorded address 1

Recorded trace · destination replied


to UTC

  1. TTL 1 Probe hop0.151 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.182 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop1.381 msReply RTT AS13335 · Cloudflare
  4. TTL 4 Probe hopNo replyNo comparable RTT ASN unavailable
  5. TTL 5 Probe hop1.430 msReply RTT AS13335 · Cloudflare
  6. TTL 6 Destination1.183 msReply RTT AS13335 · Cloudflare
After

ICMP traceroute · Recorded address 2

Recorded trace · destination not reached by this trace


to UTC

  1. TTL 1 Probe hop0.781 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.176 msReply RTT AS8002 · Stealth
After

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 hop0.275 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop1.770 msReply RTT ASN unavailable
  4. TTL 4 Probe hopNo replyNo comparable RTT ASN unavailable
  5. TTL 5 Probe hop11.122 msReply RTT AS13335 · Cloudflare
  6. TTL 6 Destination1.208 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 hop0.182 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop5.353 msReply RTT ASN unavailable
After

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 hop0.205 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 hop6.026 msReply RTT AS13335 · Cloudflare
  6. TTL 6 Destination1.116 msReply RTT AS13335 · Cloudflare
After

ICMP traceroute · Recorded address 1

Recorded trace · destination replied


to UTC

  1. TTL 1 Probe hop0.125 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.208 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop1.259 msReply RTT ASN unavailable
  4. TTL 4 Probe hop10.701 msReply RTT AS13335 · Cloudflare
  5. TTL 5 Probe hop1.641 msReply RTT AS13335 · Cloudflare
  6. TTL 6 Destination1.203 msReply RTT AS13335 · Cloudflare
After

TCP traceroute / 443 · Recorded address 1

Recorded trace · destination replied


to UTC

  1. TTL 1 Probe hop0.280 msReply RTT AS8002 · Stealth
  2. TTL 2 Probe hop0.193 msReply RTT AS8002 · Stealth
  3. TTL 3 Probe hop1.033 msReply RTT ASN unavailable
  4. TTL 4 Probe hopNo replyNo comparable RTT ASN unavailable
  5. TTL 5 Probe hop10.543 msReply RTT AS13335 · Cloudflare
  6. TTL 6 Probe hopNo replyNo comparable RTT ASN unavailable
  7. TTL 7 Destination1.917 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
10.129 msAS8002 · Stealth0.129 msAS8002 · StealthSame responder
20.185 msAS8002 · Stealth0.185 msAS8002 · StealthSame responder
30.946 ms2.797 msAS13335 · CloudflareSame responder
41.594 msAS13335 · CloudflareNot recordedNot established
52.086 msAS13335 · CloudflareNot recordedNot established
61.376 msAS13335 · CloudflareNot recordedNot established
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
10.217 msAS8002 · Stealth0.138 msAS8002 · StealthSame responder
20.708 msAS8002 · Stealth0.182 msAS8002 · StealthSame responder
331.860 ms1.858 msSame responder
4No replyNo replyNot established
53.343 msAS13335 · Cloudflare6.798 msAS13335 · CloudflareDifferent responders
61.009 msAS13335 · CloudflareNo replyNot established
7Not recorded1.961 msAS13335 · CloudflareNot 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.

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

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 RTT1.272 msUsual round trip before the event
Last recorded event RTT1.370 msLast successful event recording
Event p95 RTT17.355 ms95th percentile of successful recordings
Change from baseline+0.099 msLast event RTT compared with the baseline
Successful / expected recordings695 / 720Recorded 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