AS overview
Test target: 2001:67c:2210::1 · static prefix probe · address space: PI · prefixes announced: 1
prefix(es): 2001:67c:2210::/48
Targets & per-vantage-point probe results (1 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 | ||
2001:67c:2210::1 | prb | ✓ | ✗ | refused | refused | - | ✓ | ✗ | refused | refused | - | ✓ | ✗ | refused | refused | - | ✓ | ✗ | ? | ? | - | ✓ | ✗ | refused | refused | - | ✓ | ✗ | refused | refused | - | ✓ | ✗ | refused | refused | - |
RPKI & ASPA
0 of 1 prefix(es) covered by a valid ROA, 1 not-found.
| Prefix | RPKI state | Reason | Covering VRP(s) |
|---|---|---|---|
2001:67c:2210::/48 | - not-found | no covering VRP |
Random-IP probe (yarrp) into the AS' prefixes
We probed 35 arbitrary IPv6 address(es) inside AS49167's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2001:470:12:10::2 at hop 24 - that router answers ICMPv6 Echo. This is not in AS49167's announced prefix; operationally it's the AS-edge / peering interface (often on a SOX peering address or an upstream's /127 link). The traceroute boundary is the AS edge: ICMPv6 Time-Exceeded responses from anything inside this AS are filtered.
ICMPv6 Type 2 (Packet Too Big) acceptance - active test
Vantage points disagree about Type 2 acceptance - transit ASes on one path may be filtering Type 2 even though the destination's stack accepts it on another path:
- SRB host (SOX, Belgrade): Type 2 honored. Forged PTB accepted; next response shrunk. (ICMPv6 Echo + forged PTB)
- DE host (Berlin): Type 2 honored. Forged PTB accepted; next response shrunk. (ICMPv6 Echo + forged PTB)
- DE host (Düsseldorf): Type 2 honored. Forged PTB accepted; next response shrunk. (ICMPv6 Echo + forged PTB)
- NL host (go6lab): inconclusive: no Echo Reply after PTB (probe 1400B). (ICMPv6 Echo + forged PTB)
- ITA host (Karsolink): Type 2 honored. Forged PTB accepted; next response shrunk. (ICMPv6 Echo + forged PTB)
- SLO host (6connect): Type 2 honored. Forged PTB accepted; next response shrunk. (ICMPv6 Echo + forged PTB)
- SLO host (T-2): Type 2 honored. Forged PTB accepted; next response shrunk. (ICMPv6 Echo + forged PTB)
Why they disagree - measurement artifact: One vantage's probe didn't generate enough data to detect segment shrinkage (natural reply too small, or no second response). The other vantage's verdict is the meaningful one.
Failure detail - what to grep in your logs
| vantage | our source | your target | method | result | tested (UTC) |
|---|---|---|---|---|---|
| belgrade | 2a09:ab81::91 | 2001:67c:2210::1 | icmp6-echo | honored | 2026-09-23T11:08:26Z |
| berlin | 2a06:d1c1:10b::cccc | 2001:67c:2210::1 | icmp6-echo | honored | 2026-09-23T11:08:27Z |
| duseldorf | 2a06:d1c1:10d::aaaa | 2001:67c:2210::1 | icmp6-echo | honored | 2026-09-23T11:08:26Z |
| go6lab | 2a00:8642:42::75 | 2001:67c:2210::1 | icmp6-echo | inconclusive | 2026-09-23T11:08:30Z |
| karsolink | 2a12:d8c0:105a:9001::a154 | 2001:67c:2210::1 | icmp6-echo | honored | 2026-09-23T11:08:27Z |
| odin | 2607:fae0:a000::42 | 2001:67c:2210::1 | icmp6-echo | honored | 2026-09-23T11:08:25Z |
| t2 | 2a01:261:313:b814:2a0:98ff:fe5b:13e4 | 2001:67c:2210::1 | icmp6-echo | honored | 2026-09-23T11:08:26Z |
Attempt log (belgrade):
icmp6-echo→ honored (honored by fragmenting its reply into 2 via the IPv6 Fragment Header, rather than resizing)dns-tcp→ no_tcp: connect failed: [Errno 111] Connection refusedtls→ no_tcp: TLS connect failedhttp→ no_tcp: tcp/80 not open
Attempt log (berlin):
icmp6-echo→ honored (honored by fragmenting its reply into 2 via the IPv6 Fragment Header, rather than resizing)dns-tcp→ no_tcp: connect failed: [Errno 111] Connection refusedtls→ no_tcp: TLS connect failedhttp→ no_tcp: tcp/80 not open
Attempt log (duseldorf):
icmp6-echo→ honored (honored by fragmenting its reply into 2 via the IPv6 Fragment Header, rather than resizing)dns-tcp→ no_tcp: connect failed: [Errno 111] Connection refusedtls→ no_tcp: TLS connect failedhttp→ no_tcp: tcp/80 not open
Attempt log (go6lab):
icmp6-echo→ inconclusive (reply 1360 B before PTB): no Echo Reply after PTB (probe 1400B)dns-tcp→ no_tcp: connect failed: timed outtls→ no_tcp: TLS connect failedhttp→ no_tcp: tcp/80 not open
Attempt log (karsolink):
icmp6-echo→ honored (honored by fragmenting its reply into 2 via the IPv6 Fragment Header, rather than resizing)dns-tcp→ no_tcp: connect failed: [Errno 111] Connection refusedtls→ no_tcp: TLS connect failedhttp→ no_tcp: tcp/80 not open
Attempt log (odin):
icmp6-echo→ honored (honored by fragmenting its reply into 2 via the IPv6 Fragment Header, rather than resizing)dns-tcp→ no_tcp: connect failed: [Errno 111] Connection refusedtls→ no_tcp: TLS connect failedhttp→ no_tcp: tcp/80 not open
Attempt log (t2):
icmp6-echo→ honored (honored by fragmenting its reply into 2 via the IPv6 Fragment Header, rather than resizing)dns-tcp→ no_tcp: connect failed: [Errno 111] Connection refusedtls→ no_tcp: TLS connect failedhttp→ no_tcp: tcp/80 not open
To match the corresponding ICMPv6 packet on your side (host firewall, AS edge, or transit tap), look for our PTBs around the timestamps above:
sudo tcpdump -i any -n -e 'icmp6 and ip6[40] = 2 and (src host 2607:fae0:a000::42 or src host 2a00:8642:42::75 or src host 2a01:261:313:b814:2a0:98ff:fe5b:13e4 or src host 2a06:d1c1:10b::cccc or src host 2a06:d1c1:10d::aaaa or src host 2a09:ab81::91 or src host 2a12:d8c0:105a:9001::a154)'
If you see our PTBs arriving but the destination's TCP/Echo flow does not shrink, the drop is in the destination kernel (cause 3 below). If you don't see them at all, drop is upstream of you (cause 2). If you only see them from some of our source IPs but not others, the drop is path-asymmetric - at least one transit on the differing route is filtering.
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→ verdictinconclusive - 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 | no_tcp | no_tcp | no_tcp |
| berlin | honored | no_tcp | no_tcp | no_tcp |
| duseldorf | honored | no_tcp | no_tcp | no_tcp |
| go6lab | inconclusive | no_tcp | no_tcp | no_tcp |
| karsolink | honored | no_tcp | no_tcp | no_tcp |
| odin | honored | no_tcp | no_tcp | no_tcp |
| t2 | honored | no_tcp | no_tcp | no_tcp |
✓ 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 AS (ranked by how often they appear at the divergence point on the path of the worse-classifying vantage): AS6939.
- From belgrade (echo_only/Type-2=honored) the path enters an opaque hop at hop 7; from berlin (echo_only/Type-2=honored) the same hop is in AS6939. Last common AS: AS6939. The disagreement is most likely rooted in one of those two transit ASes.
- From belgrade (echo_only/Type-2=honored) the path enters an opaque hop at hop 7; from go6lab (echo_only/Type-2=inconclusive) the same hop is in AS6939. Last common AS: AS6939. The disagreement is most likely rooted in one of those two transit ASes.
- From belgrade (echo_only/Type-2=honored) the path enters an opaque hop at hop 7; from odin (echo_only/Type-2=honored) the same hop is in AS6939. Last common AS: AS6939. The disagreement is most likely rooted in one of those two transit ASes.
- From belgrade (echo_only/Type-2=honored) the path enters an opaque hop at hop 7; from t2 (echo_only/Type-2=honored) the same hop is in AS6939. Last common AS: AS6939. The disagreement is most likely rooted in one of those two transit ASes.
- From berlin (echo_only/Type-2=honored) the path enters an opaque hop at hop 9; from duseldorf (echo_only/Type-2=honored) the same hop is in AS6939. Last common AS: AS6939. The disagreement is most likely rooted in one of those two transit ASes.
- From berlin (echo_only/Type-2=honored) the path enters AS6939 at hop 8; from go6lab (echo_only/Type-2=inconclusive) the same hop is in an opaque hop. Last common AS: AS6939. The disagreement is most likely rooted in one of those two transit ASes.
- From berlin (echo_only/Type-2=honored) the path enters an opaque hop at hop 9; from karsolink (echo_only/Type-2=honored) the same hop is in AS6939. Last common AS: AS6939. The disagreement is most likely rooted in one of those two transit ASes.
- From berlin (echo_only/Type-2=honored) the path enters an opaque hop at hop 9; from odin (echo_only/Type-2=honored) the same hop is in AS6939. Last common AS: AS6939. The disagreement is most likely rooted in one of those two transit ASes.
- From berlin (echo_only/Type-2=honored) the path enters an opaque hop at hop 9; from t2 (echo_only/Type-2=honored) the same hop is in AS6939. Last common AS: AS6939. The disagreement is most likely rooted in one of those two transit ASes.
- From duseldorf (echo_only/Type-2=honored) the path enters AS6939 at hop 8; from go6lab (echo_only/Type-2=inconclusive) the same hop is in an opaque hop. Last common AS: AS6939. The disagreement is most likely rooted in one of those two transit ASes.
- From duseldorf (echo_only/Type-2=honored) the path enters AS6939 at hop 10; from t2 (echo_only/Type-2=honored) the same hop is in an opaque hop. Last common AS: AS6939. The disagreement is most likely rooted in one of those two transit ASes.
- From go6lab (echo_only/Type-2=inconclusive) the path enters an opaque hop at hop 8; from karsolink (echo_only/Type-2=honored) the same hop is in AS6939. Last common AS: AS6939. The disagreement is most likely rooted in one of those two transit ASes.
- From go6lab (echo_only/Type-2=inconclusive) the path enters an opaque hop at hop 8; from odin (echo_only/Type-2=honored) the same hop is in AS6939. Last common AS: AS6939. The disagreement is most likely rooted in one of those two transit ASes.
- From go6lab (echo_only/Type-2=inconclusive) the path enters an opaque hop at hop 8; from t2 (echo_only/Type-2=honored) the same hop is in AS6939. Last common AS: AS6939. The disagreement is most likely rooted in one of those two transit ASes.
- From karsolink (echo_only/Type-2=honored) the path enters AS6939 at hop 10; from t2 (echo_only/Type-2=honored) the same hop is in an opaque hop. Last common AS: AS6939. The disagreement is most likely rooted in one of those two transit ASes.
- From odin (echo_only/Type-2=honored) the path enters AS6939 at hop 10; from t2 (echo_only/Type-2=honored) the same hop is in an opaque hop. Last common AS: AS6939. 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) echo onlyRFC 4890 ✓
filter likely at: past AS6939 (HURRICANE) · min PMTU on path: 1480
4/4
Echo small (56B) 54.4ms
0/4
Echo 1500B (DF) -
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 | 0.4ms | 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 | e0-33.core2.beg1.he.net 2001:470:1:6e5::1 | 1.3ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 4 | e0-34.core2.bts1.he.net 2001:470:0:33f::2 | 8.3ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 5 | * | - | 30% | - | |
| 6 | be3.core1.prg1.he.net 2001:470:e:a7::1 | 14.2ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 7 | * | - | 40% | - | |
| 8 | 100ge0-0-0-17.core1.dus1.he.net 2001:470:0:52e::2 | 25.0ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 9 | tserv2.dus1.he.net 2001:470:0:3b2::2 | 22.7ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 10 | tunnel110879-pt.tunnel.tserv18.dus1.ipv6.he.net 2001:470:12:10::2 | 54.4ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
Rate-limited ICMPv6: hop 5, hop 7 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.020ms pmtu 1500
1: _gateway 0.314ms
1: _gateway 0.239ms
2: sox-pn.sox.rs 0.416ms
3: e0-33.core2.beg1.he.net 1.091ms
4: e0-34.core2.bts1.he.net 15.029ms
5: 100ge0-0-0-2.core1.vie1.he.net 11.200ms
6: be3.core1.prg1.he.net 16.997ms
7: be8.core4.fra1.he.net 20.951ms
8: 100ge0-0-0-17.core1.dus1.he.net 24.895ms
9: tserv2.dus1.he.net 22.894ms
10: tserv2.dus1.he.net 22.958ms pmtu 1480
10: tunnel110879-pt.tunnel.tserv18.dus1.ipv6.he.net 59.122ms reached
Resume: pmtu 1480 hops 10 back 10 From DE host (Berlin) echo onlyRFC 4890 ✓
filter likely at: past AS6939 (HURRICANE) · min PMTU on path: 1480
4/4
Echo small (56B) 50.2ms
0/4
Echo 1500B (DF) -
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 | 0.3ms | 0%* | AS59645 | WYBT-NET - Tobias Fiebig, DE |
| 2 | ae0-2453.cr10.ber01.lwlcom.net 2a06:d1c0::dead:beef:1c02 | 0.5ms | 0%* | AS59645 | WYBT-NET - Tobias Fiebig, DE |
| 3 | hurricane-electric.bcix.de 2001:7f8:19:1::1b1b:1 | 17.4ms | 0% | - | NA |
| 4 | * | - | 10% | - | |
| 5 | * | - | - | - | |
| 6 | 100ge0-0-0-16.core1.dus1.he.net 2001:470:0:371::2 | 16.3ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 7 | tserv2.dus1.he.net 2001:470:0:3b2::2 | 14.5ms | 10% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 8 | tunnel110879-pt.tunnel.tserv18.dus1.ipv6.he.net 2001:470:12:10::2 | 51.5ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
Rate-limited ICMPv6: hop 4, hop 7 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.026ms pmtu 1500
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.389ms
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.355ms
2: ae0-2453.cr10.ber01.lwlcom.net 0.816ms
3: hurricane-electric.bcix.de 15.954ms asymm 6
4: be4.core3.ams1.he.net 17.635ms asymm 5
5: no reply
6: 100ge0-0-0-16.core1.dus1.he.net 15.189ms asymm 4
7: tserv2.dus1.he.net 14.902ms asymm 5
8: tserv2.dus1.he.net 14.759ms pmtu 1480
8: tunnel110879-pt.tunnel.tserv18.dus1.ipv6.he.net 51.168ms reached
Resume: pmtu 1480 hops 8 back 6 From DE host (Düsseldorf) echo onlyRFC 4890 ✓
filter likely at: past AS6939 (HURRICANE) · min PMTU on path: 1480
4/4
Echo small (56B) 40.4ms
0/4
Echo 1500B (DF) -
yes
Type 1 dest-unreach
443,80
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | xe-0-0-12-142.gw01.dus01.as59645.net 2a06:d1c1:100:d::1 | 24.5ms | 0%* | AS59645 | WYBT-NET - Tobias Fiebig, DE |
| 2 | eth1-0-12-h5594.edge5-dus1.bb.wiit.network 2001:4ba0:92f4:3::1 | 0.9ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 3 | lag10-h5f01.agr4-dus1.bb.wiit.network 2001:4ba0:ffe9:7c::1 | 3.4ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 4 | lag11.core3-dus1.bb.wiit.network 2001:4ba0:ffe9:115::3 | 0.3ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 5 | lag2.core2-dus3.bb.wiit.network 2001:4ba0:ffe9::1 | 0.2ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 6 | lag0-vl1002.core1-ams-eq3.bb.wiit.network 2001:4ba0:ffe9:10::2 | 7.6ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 7 | * | - | - | - | |
| 8 | 100ge0-0-0-16.core1.dus1.he.net 2001:470:0:371::2 | 9.5ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 9 | tserv2.dus1.he.net 2001:470:0:3b2::2 | 7.1ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 10 | tunnel110879-pt.tunnel.tserv18.dus1.ipv6.he.net 2001:470:12:10::2 | 45.0ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
tracepath -6
1?: [LOCALHOST] 0.023ms pmtu 1500
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.358ms
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.204ms
2: eth1-0-12-h5594.edge5-dus1.bb.wiit.network 1.123ms
3: no reply
4: lag30.core3-dus1.bb.wiit.network 0.411ms
5: lag2.core2-dus3.bb.wiit.network 0.368ms asymm 4
6: lag0-vl1002.core1-ams-eq3.bb.wiit.network 3.370ms asymm 5
7: no reply
8: 100ge0-0-0-16.core1.dus1.he.net 10.226ms asymm 3
9: tserv2.dus1.he.net 7.371ms asymm 4
10: tserv2.dus1.he.net 7.419ms pmtu 1480
10: tunnel110879-pt.tunnel.tserv18.dus1.ipv6.he.net 43.589ms reached
Resume: pmtu 1480 hops 10 back 5 From NL host (go6lab) echo only
filter likely at: past AS6939 (HURRICANE) · min PMTU on path: 1480
4/4
Echo small (56B) 39.8ms
0/4
Echo 1500B (DF) -
yes
Type 1 dest-unreach
-
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | 2a00:8642:42::2 | 2.6ms | 0% | AS203993 | GNA-DC1-AS - S.J.M. Steffann, NL |
| 2 | * | - | 0%* | - | |
| 3 | speed-ix.he.net 2001:7f8:b7::a500:6939:1 | 8.9ms | 0% | - | NA |
| 4 | * | - | - | - | |
| 5 | 100ge0-0-0-16.core1.dus1.he.net 2001:470:0:371::2 | 10.1ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 6 | tserv2.dus1.he.net 2001:470:0:3b2::2 | 9.0ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 7 | tunnel110879-pt.tunnel.tserv18.dus1.ipv6.he.net 2001:470:12:10::2 | 42.8ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
tracepath -6
1?: [LOCALHOST] 0.047ms pmtu 1480
1: 2a00:8642:42::2 2.289ms
1: 2a00:8642:42::2 1.835ms
2: gw.friends.steffann.nl 7.216ms
3: speed-ix.he.net 13.220ms
4: no reply
5: 100ge0-0-0-16.core1.dus1.he.net 16.401ms
6: tserv2.dus1.he.net 11.061ms
7: tunnel110879-pt.tunnel.tserv18.dus1.ipv6.he.net 48.685ms reached
Resume: pmtu 1480 hops 7 back 7 From ITA host (Karsolink) echo onlyRFC 4890 ✓
filter likely at: past AS6939 (HURRICANE) · min PMTU on path: 1480
4/4
Echo small (56B) 52.9ms
0/4
Echo 1500B (DF) -
yes
Type 1 dest-unreach
443,80
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | karsolink-01.net.karsolink.com 2a12:d8c0:105a:9001::1 | 0.3ms | - | AS204471 | KARSOLINK - 2S Computers SRL, IT |
| 2 | 2a12:d8c0:109f:121::a1 | 0.3ms | - | AS204471 | KARSOLINK - 2S Computers SRL, IT |
| 3 | 2a12:d8c0:101f:6::1 | 9.7ms | - | AS204471 | KARSOLINK - 2S Computers SRL, IT |
| 4 | * | - | - | - | |
| 5 | be47.core1.mil2.he.net 2001:470:e:69::2 | 11.5ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 6 | be1.core1.zrh2.he.net 2001:470:e:dd::2 | 16.3ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 7 | be10.core4.fra1.he.net 2001:470:e:153::1 | 20.6ms | 20% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 8 | 100ge0-0-0-17.core1.dus1.he.net 2001:470:0:52e::2 | 25.7ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 9 | tserv2.dus1.he.net 2001:470:0:3b2::2 | 21.7ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 10 | tunnel110879-pt.tunnel.tserv18.dus1.ipv6.he.net 2001:470:12:10::2 | 53.4ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
Rate-limited ICMPv6: hop 7 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.027ms pmtu 1500
1: karsolink-01.net.karsolink.com 0.338ms
2: 2a12:d8c0:109f:121::a1 0.565ms
3: 2a12:d8c0:101f:6::1 10.031ms
4: no reply
5: be47.core1.mil2.he.net 10.941ms
6: be1.core1.zrh2.he.net 15.778ms
7: be10.core4.fra1.he.net 21.262ms
8: 100ge0-0-0-17.core1.dus1.he.net 26.183ms
9: tserv2.dus1.he.net 22.884ms
10: tserv2.dus1.he.net 22.990ms pmtu 1480
10: tunnel110879-pt.tunnel.tserv18.dus1.ipv6.he.net 92.794ms reached
Resume: pmtu 1480 hops 10 back 10 From SLO host (6connect) echo onlyRFC 4890 ✓
filter likely at: past AS6939 (HURRICANE) · min PMTU on path: 1480
4/4
Echo small (56B) 56.3ms
0/4
Echo 1500B (DF) -
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 | ccr-to-fw-ccr1-gw-lju.6connect.com 2607:fae0:a000:2::2 | 0.6ms | - | AS8038 | 6CONNECT - 6connect, Inc., US |
| 3 | 2a03:a100:0:201:1::1 | 0.8ms | 0% | AS56635 | XENYA - XENYA inzeniring, proizvodnja in trgovina, d.o.o. Ljubljana, SI |
| 4 | e0-1.core1.lju1.he.net 2001:470:1:5be::1 | 2.6ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 5 | 100ge0-0-0-5.core1.vie1.he.net 2001:470:0:578::1 | 8.5ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 6 | be3.core1.prg1.he.net 2001:470:e:a7::1 | 11.9ms | 20% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 7 | be8.core4.fra1.he.net 2001:470:e:1e::1 | 19.6ms | 60% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 8 | 100ge0-0-0-17.core1.dus1.he.net 2001:470:0:52e::2 | 21.4ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 9 | tserv2.dus1.he.net 2001:470:0:3b2::2 | 20.0ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 10 | tunnel110879-pt.tunnel.tserv18.dus1.ipv6.he.net 2001:470:12:10::2 | 55.6ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
Rate-limited ICMPv6: hop 6, hop 7 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.026ms pmtu 9000
1: fw1-lju.6connect.com 0.649ms
1: fw1-lju.6connect.com 0.479ms
2: no reply
3: 2a03:a100:0:201:1::1 1.188ms
4: 2a03:a100:0:201:1::1 0.647ms pmtu 1500
4: e0-1.core1.lju1.he.net 1.723ms
5: 100ge0-0-0-5.core1.vie1.he.net 8.769ms
6: be3.core1.prg1.he.net 16.172ms
7: be8.core4.fra1.he.net 18.358ms
8: 100ge0-0-0-17.core1.dus1.he.net 22.145ms
9: tserv2.dus1.he.net 20.103ms
10: tserv2.dus1.he.net 20.038ms pmtu 1480
10: tunnel110879-pt.tunnel.tserv18.dus1.ipv6.he.net 56.244ms reached
Resume: pmtu 1480 hops 10 back 10 From SLO host (T-2) echo onlyRFC 4890 ✓
filter likely at: past AS6939 (HURRICANE) · min PMTU on path: 1480
4/4
Echo small (56B) 69.7ms
0/4
Echo 1500B (DF) -
yes
Type 1 dest-unreach
443,80
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | 2a01:261:313:b814::1 | 0.5ms | - | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 2 | 2a01:260:1::225 | 6.4ms | 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 | 2.4ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 4 | hurricane-electric.nikhef.nlsix.net 2001:7f8:13::a500:6939:1 | 40.6ms | 0% | - | NA |
| 5 | * | - | - | - | |
| 6 | 100ge0-0-0-16.core1.dus1.he.net 2001:470:0:371::2 | 37.8ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 7 | 100ge0-0-0-16.core1.dus1.he.net 2001:470:0:371::2 | 41.6ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 8 | tserv2.dus1.he.net 2001:470:0:3b2::2 | 42.4ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 9 | tunnel110879-pt.tunnel.tserv18.dus1.ipv6.he.net 2001:470:12:10::2 | 72.7ms | - | AS6939 | HURRICANE - Hurricane Electric LLC, US |
tracepath -6
1?: [LOCALHOST] 0.026ms pmtu 1500
1: 2a01:261:313:b814::1 0.875ms
1: 2a01:261:313:b814::1 1.319ms
2: 2a01:260:1::225 2.984ms
3: 2a01-260-1-1--9a.core6.t-2.net 2.305ms
4: 2a01-260-1-1--39.core6.t-2.net 1.808ms asymm 3
5: no reply
6: 100ge0-0-0-16.core1.dus1.he.net 40.919ms
7: tserv2.dus1.he.net 40.466ms
8: tserv2.dus1.he.net 40.538ms asymm 7
9: tserv2.dus1.he.net 37.641ms pmtu 1480
9: tunnel110879-pt.tunnel.tserv18.dus1.ipv6.he.net 74.956ms reached
Resume: pmtu 1480 hops 9 back 8