AS overview
Test target: 2001:678:cc8:2:8000:: · via IPv6 Hitlist (responsive) · address space: PI · prefixes announced: 1
prefix(es): 2001:678:cc8::/48
Targets & per-vantage-point probe results (8 target(s) across 7 vantage point(s))
Source codes (hover any badge for full description): CUR=curated · NS/SOA/MX=DNS records · SPF=SPF TXT · DRV=holder-derived (www, ns1, mail, gw, …) · ATL=RIPE Atlas · PDB=PeeringDB · WHOIS=RIPE whois · RDAP=RIPE RDAP · HIT=IPv6 Hitlist · RTR=in-prefix path hop (router) · PRB=static prefix probe · SYN=synthetic prefix::1 fallback
| Target IP / hostname | Source | SRB host (SOX, Belgrade) | DE host (Berlin) | DE host (Düsseldorf) | NL host (go6lab) | ITA host (Karsolink) | SLO host (6connect) | SLO host (T-2) | ||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ping | 1500B | :80 | :443 | reached | ping | 1500B | :80 | :443 | reached | ping | 1500B | :80 | :443 | reached | ping | 1500B | :80 | :443 | reached | ping | 1500B | :80 | :443 | reached | ping | 1500B | :80 | :443 | reached | ping | 1500B | :80 | :443 | reached | ||
2001:678:cc8:2:8000:: | hit | ✓ | ✓ | open | open | - | ✓ | ✓ | open | open | - | ✓ | ✓ | open | open | - | ✓ | ✓ | open | open | - | ✓ | ✓ | open | open | - | ✓ | ✓ | open | open | - | ✓ | ✓ | open | open | - |
2001:678:cc8:2:8000:c001:aaaa:aaaa | hit | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ |
2001:678:cc8:2:8000:c001:c0ff:ee | hit | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ | ✓ | ✓ | open | open | ✓ |
2001:678:cc8:3::1 | hit | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | ? | ? | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ |
2001:678:cc8:3::2 | hit | ✗ | ✗ | ? | ? | - | ✗ | ✗ | ? | ? | - | ✗ | ✗ | ? | ? | - | ✗ | ✗ | ? | ? | - | ✗ | ✗ | ? | ? | - | ✗ | ✗ | ? | ? | - | ✗ | ✗ | ? | ? | - |
2001:678:cc8::1 | prb | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | ? | ? | ✓ | ✓ | ✓ | refused | refused | - | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ |
2001:678:cc8:ffff::5 | hit | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | ? | ? | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ |
2001:678:cc8:ffff::6 | hit | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | ? | ? | ✓ | ✓ | ✓ | refused | refused | - | ✓ | ✓ | refused | refused | ✓ | ✓ | ✓ | refused | refused | ✓ |
SIX peering
SIX member - open peering, peering member, since 2013-03-13. IPv6 LAN: 2001:7f8:46:0:1:0:4:1427. Locations: lj_tpl.
- rs1-lan1-ipv6 →
2001:7f8:46:0:1:0:4:1427Established (loc: lj_tpl, since 2026-09-18) - rs2-lan1-ipv6 →
2001:7f8:46:0:1:0:4:1427Established (loc: lj_tpl, since 2026-08-24)
Announces via SIX route servers: 1 prefix(es) - 2001:678:cc8::/48
RPKI & ASPA
0 of 1 prefix(es) covered by a valid ROA, 1 not-found.
| Prefix | RPKI state | Reason | Covering VRP(s) |
|---|---|---|---|
2001:678:cc8::/48 | - not-found | no covering VRP |
Random-IP probe (yarrp) into the AS' prefixes
At least one router inside AS41427's announced prefix replied during the random-target probe. Hop(s): 2001:678:cc8:ffff::5. These are candidate targets for direct testing.
ICMPv6 Type 2 (Packet Too Big) acceptance - active test
Type 2 honored. Forged ICMPv6 PTB (MTU=1280) was accepted by the destination's stack: the next 1500-byte Echo Reply arrived split into 2 fragments via the IPv6 Fragment Header.
method: ICMPv6 Echo + forged PTB, tested 2026-09-23T10:31:50Z
Where the path divergence is
Per-vantage probe + verdict (headline):
- belgrade: probe
icmp6-echo→ verdicthonored - berlin: probe
icmp6-echo→ verdicthonored - duseldorf: probe
icmp6-echo→ verdicthonored - go6lab: probe
icmp6-echo→ verdicthonored - karsolink: probe
icmp6-echo→ verdicthonored - odin: probe
icmp6-echo→ verdicthonored - t2: probe
icmp6-echo→ verdicthonored
Full per-method matrix (all four methods run at each vantage):
| vantage | icmp6-echo | dns-tcp | tls | http |
|---|---|---|---|---|
| belgrade | honored | inconclusive | not_honored | inconclusive |
| berlin | honored | inconclusive | not_honored | inconclusive |
| duseldorf | honored | inconclusive | not_honored | inconclusive |
| go6lab | honored | inconclusive | not_honored | inconclusive |
| karsolink | honored | inconclusive | not_honored | inconclusive |
| odin | honored | inconclusive | partial | inconclusive |
| t2 | honored | inconclusive | not_honored | inconclusive |
✓ All vantages agree on method(s): icmp6-echo - the headline-method spread above is dispatcher noise, not a real Type 2 disagreement.
These vantage-level disagreements are rooted somewhere in the forward paths. Joining each per-vantage traceroute against the IP→AS lookup from our global yarrp mesh, the first hop where the paths land in different ASes is the most likely site of the offending filter / unreachable AS / Type 2 drop.
Suspect transit ASes (ranked by how often they appear at the divergence point on the path of the worse-classifying vantage): AS41427, AS3356, AS174.
- From berlin (open/Type-2=honored) the path enters AS3356 at hop 6; from go6lab (open/Type-2=honored) the same hop is in AS174. Last common AS: AS41427. The disagreement is most likely rooted in one of those two transit ASes.
- From berlin (open/Type-2=honored) the path enters AS41427 at hop 8; from karsolink (open/Type-2=honored) the same hop is in AS3356. Last common AS: AS41427. The disagreement is most likely rooted in one of those two transit ASes.
- From berlin (open/Type-2=honored) the path enters AS41427 at hop 8; from odin (open/Type-2=honored) the same hop is in an opaque hop. Last common AS: AS41427. The disagreement is most likely rooted in one of those two transit ASes.
- From berlin (open/Type-2=honored) the path enters AS41427 at hop 8; from t2 (open/Type-2=honored) the same hop is in an opaque hop. Last common AS: AS41427. The disagreement is most likely rooted in one of those two transit ASes.
- From duseldorf (open/Type-2=honored) the path enters AS3356 at hop 6; from go6lab (open/Type-2=honored) the same hop is in AS174. Last common AS: AS41427. The disagreement is most likely rooted in one of those two transit ASes.
- From duseldorf (open/Type-2=honored) the path enters AS41427 at hop 8; from karsolink (open/Type-2=honored) the same hop is in AS3356. Last common AS: AS41427. The disagreement is most likely rooted in one of those two transit ASes.
- From duseldorf (open/Type-2=honored) the path enters AS41427 at hop 8; from odin (open/Type-2=honored) the same hop is in an opaque hop. Last common AS: AS41427. The disagreement is most likely rooted in one of those two transit ASes.
- From duseldorf (open/Type-2=honored) the path enters AS41427 at hop 8; from t2 (open/Type-2=honored) the same hop is in an opaque hop. Last common AS: AS41427. The disagreement is most likely rooted in one of those two transit ASes.
- From go6lab (open/Type-2=honored) the path enters AS174 at hop 7; from karsolink (open/Type-2=honored) the same hop is in AS3356. Last common AS: AS41427. The disagreement is most likely rooted in one of those two transit ASes.
- From go6lab (open/Type-2=honored) the path enters AS174 at hop 5; from odin (open/Type-2=honored) the same hop is in AS41427. Last common AS: AS41427. The disagreement is most likely rooted in one of those two transit ASes.
- From go6lab (open/Type-2=honored) the path enters AS174 at hop 5; from t2 (open/Type-2=honored) the same hop is in AS41427. Last common AS: AS41427. The disagreement is most likely rooted in one of those two transit ASes.
- From karsolink (open/Type-2=honored) the path enters AS41427 at hop 9; from odin (open/Type-2=honored) the same hop is in an opaque hop. Last common AS: AS41427. The disagreement is most likely rooted in one of those two transit ASes.
- From karsolink (open/Type-2=honored) the path enters AS41427 at hop 9; from t2 (open/Type-2=honored) the same hop is in an opaque hop. Last common AS: AS41427. The disagreement is most likely rooted in one of those two transit ASes.
Diagnosis is path-level, not packet-level: it tells you which transit AS is the prime suspect, not exactly which firewall rule is to blame. Use the tracepath6 output below (when available) for per-hop PMTU evidence on the same path.
✨ Diagnostic interpretation
An operator-targeted diagnostic interpretation can be generated for this AS on demand. The pipeline holds the raw verdicts and the per-hop walk; an AI pass synthesises where to start looking. Click the button below to run it.
Multi-vantage path map
Every hop of all vantages’ traceroutes toward the target, drawn left→right, grouped into per-AS bubbles (a hop seen from several vantages is one shared bubble, so converging paths merge). It answers two questions per vantage — shown on each source bubble as echo ✓/⚠/✗ · trace ✓/✗: did the destination reply to ICMPv6 Echo (✓ honored, ⚠ replied but PTB not honored, ✗ no reply), and did the traceroute reach it. A line to the target is drawn only when that vantage got an echo reply — solid if the PTB was honored, dashed if not (reachable but a broken-PMTUD / RFC 4890 violation). The path depth still shows how far the traceroute itself got, and runs of unanswered (* *) hops collapse into one dashed “silent” bubble. Open full size ↗
- ● SRB host (SOX, Belgrade)
- ● DE host (Berlin)
- ● DE host (Düsseldorf)
- ● NL host (go6lab)
- ● ITA host (Karsolink)
- ● SLO host (6connect)
- ● SLO host (T-2)
- ── solid line = echo reply, PTB honored (clean reach)
- — — dashed line = echo reply but PTB not honored (RFC 4890 violation)
- no line = no echo reply (never reached)
- ◉ target: green = clean, amber = reachable-but-violation / unreachable
- ⚠ suspected drop AS
- ⋯ silent (unanswered) hops
- ● IXP hop
From SRB host (SOX, Belgrade) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
4/4
Echo small (56B) 54.0ms
4/4
Echo 1500B (DF) 54.1ms
yes
Type 1 dest-unreach
443,80
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | 2a09:ab81::1 | 0.2ms | 0%* | AS60733 | PERKE-NET - ZORAN PEROVIC trading as Agencija Perke.NET, RS |
| 2 | sox-pn.sox.rs 2001:7f8:1e:8::3a | 0.3ms | 0% | AS13004 | SOX - Serbian Open Exchange DOO, RS |
| 3 | 2001:7f8:1e:8::3d | 0.6ms | 0% | AS13004 | SOX - Serbian Open Exchange DOO, RS |
| 4 | * | - | 0% | - | |
| 5 | 2001:678:cc8:2:8000 | 54.1ms | 0% | - |
tracepath -6
1?: [LOCALHOST] 0.011ms pmtu 1500
1: _gateway 0.566ms
1: _gateway 0.532ms
2: sox-pn.sox.rs 0.383ms
3: 2001:7f8:1e:8::3d 0.669ms asymm 2
4: 2001:67c:128c::699 20.249ms
5: no reply
6: no reply
7: no reply
8: no reply
9: no reply
10: no reply
11: no reply
12: no reply
13: no reply
14: no reply
15: no reply
16: no reply
17: no reply
18: no reply
19: no reply
20: no reply
Too many hops: pmtu 1500
Resume: pmtu 1500 From DE host (Berlin) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
4/4
Echo small (56B) 36.4ms
4/4
Echo 1500B (DF) 36.6ms
yes
Type 1 dest-unreach
443,80
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | xe-0-0-13-178.gw01.ber01.as59645.net 2a06:d1c1:100:b::1 | 0.2ms | 0%* | AS59645 | WYBT-NET - Tobias Fiebig, DE |
| 2 | ae0-2453.cr10.ber01.lwlcom.net 2a06:d1c0::dead:beef:1c02 | 0.6ms | 0%* | AS59645 | WYBT-NET - Tobias Fiebig, DE |
| 3 | ae0-150.cr10.fra01.lwlcom.net 2a00:c380:b200:230::174 | 10.0ms | 0% | AS50629 | LWLCOM - LWLcom GmbH, DE |
| 4 | ae0-20.cr10.fra07.lwlcom.net 2a00:c380:b200:230::31 | 10.1ms | 0% | AS50629 | LWLCOM - LWLcom GmbH, DE |
| 5 | * | - | 60% | - | |
| 6 | lo0.0.bar1.Ljubljana1.level3.net 2001:4c08::53 | 32.6ms | 0% | AS3356 | LEVEL3 - Level 3 Parent, LLC, US |
| 7 | 2001:1900:5:2:2::5f12 | 35.6ms | 0% | AS3356 | LEVEL3 - Level 3 Parent, LLC, US |
| 8 | 2001:678:cc8:ffff::5 | 36.3ms | 0% | AS41427 | marc-net_AS - marc-net_AS, SI |
| 9 | 2001:678:cc8:2:8000 | 36.3ms | 0% | - |
Rate-limited ICMPv6: hop 5 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.014ms pmtu 1500
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.690ms
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.510ms
2: ae0-2453.cr10.ber01.lwlcom.net 1.080ms
3: ae0-150.cr10.fra01.lwlcom.net 21.337ms asymm 7
4: ae0-20.cr10.fra07.lwlcom.net 10.399ms asymm 6
5: no reply
6: lo0.0.bar1.Ljubljana1.level3.net 32.334ms asymm 7
7: 2001:1900:5:2:2::5f12 35.863ms asymm 16
8: 2001:678:cc8:ffff::5 45.798ms asymm 17
9: no reply
10: no reply
11: no reply
12: no reply
13: no reply
14: no reply
15: no reply
16: no reply
17: no reply
18: no reply
19: no reply
20: no reply
Too many hops: pmtu 1500
Resume: pmtu 1500 From DE host (Düsseldorf) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
4/4
Echo small (56B) 30.4ms
4/4
Echo 1500B (DF) 30.6ms
yes
Type 1 dest-unreach
443,80
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | * | - | 0%* | - | |
| 2 | eth1-0-12-h5594.edge5-dus1.bb.wiit.network 2001:4ba0:92f4:3::1 | 4.0ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 3 | lag13.agr3-dus3.bb.wiit.network 2001:4ba0:ffe9:7d::1 | 2.3ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 4 | lag30.core3-dus1.bb.wiit.network 2001:4ba0:ffe9:109::2 | 0.2ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 5 | * | - | 0% | - | |
| 6 | lo0.0.bar1.Ljubljana1.level3.net 2001:4c08::53 | 25.8ms | 0% | AS3356 | LEVEL3 - Level 3 Parent, LLC, US |
| 7 | 2001:1900:5:2:2::5f12 | 29.7ms | 0% | AS3356 | LEVEL3 - Level 3 Parent, LLC, US |
| 8 | 2001:678:cc8:ffff::5 | 29.9ms | 0% | AS41427 | marc-net_AS - marc-net_AS, SI |
| 9 | 2001:678:cc8:2:8000 | 30.0ms | 0% | - |
tracepath -6
1?: [LOCALHOST] 0.012ms pmtu 1500
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.369ms
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.343ms
2: eth1-0-12-h5594.edge5-dus1.bb.wiit.network 1.225ms
3: no reply
4: lag30.core3-dus1.bb.wiit.network 0.441ms
5: no reply
6: lo0.0.bar1.Ljubljana1.level3.net 26.177ms
7: 2001:1900:5:2:2::5f12 30.046ms asymm 15
8: 2001:678:cc8:ffff::5 33.722ms asymm 16
9: no reply
10: no reply
11: no reply
12: no reply
13: no reply
14: no reply
15: no reply
16: no reply
17: no reply
18: no reply
19: no reply
20: no reply
Too many hops: pmtu 1500
Resume: pmtu 1500 From NL host (go6lab) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
4/4
Echo small (56B) 135.4ms
4/4
Echo 1500B (DF) 30.7ms
yes
Type 1 dest-unreach
443,80
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | 2a00:8642:42::2 | 2.4ms | 0% | AS203993 | GNA-DC1-AS - S.J.M. Steffann, NL |
| 2 | gw.friends.steffann.nl 2a00:8642:1000:f000::1 | 3.1ms | 0%* | AS203993 | GNA-DC1-AS - S.J.M. Steffann, NL |
| 3 | 2a00:1ca8:1::194 | 2.6ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 4 | 2a03:3f40::10:41 | 3.7ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 5 | 2001:978:2:40::3:1 | 3.6ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 6 | be3458.ccr42.ams03.atlas.cogentco.com 2001:550:0:1000::9a36:27b9 | 5.6ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 7 | be3343.ccr41.fra05.atlas.cogentco.com 2001:550:0:1000::9a36:3e8d | 14.0ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 8 | be5516.ccr21.muc03.atlas.cogentco.com 2001:550:0:1000::9a36:3e7a | 17.5ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 9 | be9456.ccr82.vie01.atlas.cogentco.com 2001:550:0:1000::9a36:3f8d | 22.4ms | 20% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 10 | be7244.agr62.vie01.atlas.cogentco.com 2001:550:0:1000::9a36:276e | 23.0ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 11 | be9461.rcr62.lju01.atlas.cogentco.com 2001:550:0:1000::9a36:48a2 | 28.8ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 12 | be9462.nr61.b021176-0.lju01.atlas.cogentco.com 2001:550:0:1000::9a19:11a5 | 29.6ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 13 | 2001:978:2:39::6:2 | 30.0ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 14 | 2001:678:cc8:ffff::5 | 28.8ms | 0% | AS41427 | marc-net_AS - marc-net_AS, SI |
| 15 | 2001:678:cc8:2:8000 | 29.2ms | 0% | - |
Rate-limited ICMPv6: hop 9 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.041ms pmtu 1500
1: 2a00:8642:42::2 2.593ms
1: ??? 1.422ms
2: gw.friends.steffann.nl 3.710ms
3: 2a00:1ca8:1::194 6.400ms
4: 2a03:3f40::10:41 2.125ms
5: 2001:978:2:40::3:1 4.213ms
6: be3458.ccr42.ams03.atlas.cogentco.com 42.492ms
7: be3343.ccr41.fra05.atlas.cogentco.com 13.127ms
8: be5516.ccr21.muc03.atlas.cogentco.com 17.759ms
9: be9456.ccr82.vie01.atlas.cogentco.com 26.316ms
10: be7244.agr62.vie01.atlas.cogentco.com 27.425ms
11: be3189.rcr61.lju01.atlas.cogentco.com 31.788ms
12: be9462.nr61.b021176-0.lju01.atlas.cogentco.com 30.137ms
13: 2001:978:2:39::6:2 33.548ms
14: 2001:678:cc8:ffff::5 95.825ms
15: no reply
16: no reply
17: no reply
18: no reply
19: no reply
20: no reply
Too many hops: pmtu 1500
Resume: pmtu 1500 From ITA host (Karsolink) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
4/4
Echo small (56B) 38.0ms
4/4
Echo 1500B (DF) 38.2ms
yes
Type 1 dest-unreach
443,80
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | * | - | - | - | |
| 2 | * | - | 0%* | - | |
| 3 | 2a12:d8c0:109f:106::a2 | 3.0ms | 90% | AS204471 | KARSOLINK - 2S Computers SRL, IT |
| 4 | 2a02:2d8:1:b80d:232a | 7.8ms | 0% | - | |
| 5 | RT.IRX.FKT.DE.retn.net 2a02:2d8::57f5:e0a1 | 16.2ms | 80% | AS9002 | RETN-AS - RETN Limited, GB |
| 6 | 2001:978:2:2a::e7:1 | 11.0ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
| 7 | lo0.0.bar1.Ljubljana1.level3.net 2001:4c08::53 | 39.5ms | 0% | AS3356 | LEVEL3 - Level 3 Parent, LLC, US |
| 8 | 2001:1900:5:2:2::5f12 | 37.1ms | 0% | AS3356 | LEVEL3 - Level 3 Parent, LLC, US |
| 9 | 2001:678:cc8:ffff::5 | 127.5ms | 0% | AS41427 | marc-net_AS - marc-net_AS, SI |
| 10 | 2001:678:cc8:2:8000 | 38.0ms | 0% | - |
Rate-limited ICMPv6: hop 3, hop 5 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.028ms pmtu 1500
1: no reply
2: no reply
3: 2a12:d8c0:101f:6::1 9.937ms
4: 2a03:b020:1:51::a 10.216ms
5: 2a03:b020::246 10.397ms
6: no reply
7: lo0.0.bar1.Ljubljana1.level3.net 39.386ms
8: 2001:1900:5:2:2::5f12 37.636ms
9: be5891.ccr21.muc03.atlas.cogentco.com 19.683ms
10: be5456.ccr81.vie01.atlas.cogentco.com 25.989ms
11: be3935.agr61.vie01.atlas.cogentco.com 25.834ms
12: be3189.rcr61.lju01.atlas.cogentco.com 31.671ms
13: no reply
14: 2001:978:2:39::6:2 28.907ms asymm 8
15: 2001:678:cc8:ffff::5 36.186ms asymm 9
16: no reply
17: no reply
18: no reply
19: no reply
20: no reply
Too many hops: pmtu 1500
Resume: pmtu 1500 From SLO host (6connect) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
4/4
Echo small (56B) 1.4ms
4/4
Echo 1500B (DF) 1.5ms
yes
Type 1 dest-unreach
443,80
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | fw1-lju.6connect.com 2607:fae0:a000::2 | 0.3ms | 0%* | AS8038 | 6CONNECT - 6connect, Inc., US |
| 2 | * | - | - | - | |
| 3 | * | - | 20% | - | |
| 4 | six2.metronet.si @SIX 2001:7f8:46:0:1:0:4:1427 | 0.9ms | 0% | AS51988 | ARNES-SIX - ARNES, SI |
| 5 | 2001:678:cc8:ffff::5 | 9.4ms | 0% | AS41427 | marc-net_AS - marc-net_AS, SI |
| 6 | * | - | 0% | - | |
| 7 | * | - | - | - | |
| 8 | * | - | - | - | |
| 9 | * | - | - | - | |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - | |
| 18 | * | - | - | - | |
| 19 | * | - | - | - | |
| 20 | * | - | - | - | |
| 21 | * | - | - | - |
Rate-limited ICMPv6: hop 3 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.015ms pmtu 9000
1: fw1-lju.6connect.com 0.639ms
1: fw1-lju.6connect.com 0.668ms
2: no reply
3: 2a03:a100:0:201:1::1 1.038ms
4: 2a03:a100:0:201:1::1 1.085ms pmtu 1500
4: six2.metronet.si 1.365ms asymm 5
5: 2001:678:cc8:ffff::5 26.807ms asymm 6
6: no reply
7: no reply
8: no reply
9: no reply
10: no reply
11: no reply
12: no reply
13: no reply
14: no reply
15: no reply
16: no reply
17: no reply
18: no reply
19: no reply
20: no reply
21: no reply
Too many hops: pmtu 1500From SLO host (T-2) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
4/4
Echo small (56B) 2.5ms
4/4
Echo 1500B (DF) 2.9ms
yes
Type 1 dest-unreach
443,80
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | * | - | 0%* | - | |
| 2 | 2a01:260:1::225 | 2.1ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 3 | 2a01-260-1-1--9c.core6.t-2.net 2a01:260:1:1::9c | 1.9ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 4 | six2.metronet.si @SIX 2001:7f8:46:0:1:0:4:1427 | 2.2ms | 0% | AS51988 | ARNES-SIX - ARNES, SI |
| 5 | 2001:678:cc8:ffff::5 | 11.4ms | 0% | AS41427 | marc-net_AS - marc-net_AS, SI |
| 6 | 2001:678:cc8:2:8000 | 2.2ms | 0% | - |
tracepath -6
1?: [LOCALHOST] 0.028ms pmtu 1500
1: 2a01:261:313:b814::1 1.267ms
1: 2a01:261:313:b814::1 1.362ms
2: 2a01:260:1::225 5.157ms
3: 2a01-260-1-1--9a.core6.t-2.net 3.370ms
4: six2.metronet.si 31.613ms
5: 2001:678:cc8:ffff::5 3.192ms
6: no reply
7: no reply
8: no reply
9: no reply
10: no reply
11: no reply
12: no reply
13: no reply
14: no reply
15: no reply
16: no reply
17: no reply
18: no reply
19: no reply
20: no reply
Too many hops: pmtu 1500
Resume: pmtu 1500