AS overview
Test target: 2001:4c91:1::250 · ns2.eolo.it · address space: PA · prefixes announced: 1
prefix(es): 2001:4c90::/29
Targets & per-vantage-point probe results (2 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 | ||
2001:4c91:1::248test.ngi.it | drv | ✓ | ✓ | open | open | - | ✓ | ✓ | open | open | - | ✓ | ✓ | open | open | - | ✗ | ✗ | ? | ? | - | ✓ | ✓ | open | open | - | ✓ | ✓ | open | open | - | ✗ | ✗ | ? | ? | - |
2001:4c91:1::250ns2.eolo.it | NS | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✗ | ✗ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✗ | ✗ | ? | ? | - |
MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO peering
MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO member - Open peering, peering member, since 2012-11-15. IPv6 LAN: 2001:7f8:b:100:1d1:a5d3:5612:114. Locations: -.
RPKI & ASPA
1 of 1 prefix(es) covered by a valid ROA.
| Prefix | RPKI state | Reason | Covering VRP(s) |
|---|---|---|---|
2001:4c90::/29 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS35612 /29 maxLen 29 (ripe) |
Random-IP probe (yarrp) into the AS' prefixes
We probed 35 arbitrary IPv6 address(es) inside AS35612's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2001:4ba0:ffe9:db::2 at hop 11 - that router answers ICMPv6 Echo. This is not in AS35612's announced prefix; operationally it's the AS-edge / peering interface (often on an IXP 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 to 1300-byte probe. (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): inconclusive: no Echo Reply to 1300-byte probe. (ICMPv6 Echo + forged PTB)
Why they disagree - reachability mismatch: One vantage couldn't drive a flow at all to this destination (no Echo Reply or no responding TCP port), so the active test had no behavioural change to observe. The other vantage's verdict is the only meaningful one here.
Failure detail - what to grep in your logs
| vantage | our source | your target | method | result | tested (UTC) |
|---|---|---|---|---|---|
| belgrade | 2a09:ab81::91 | 2001:4c91:1::250 | icmp6-echo | honored | 2026-09-23T11:59:59Z |
| berlin | 2a06:d1c1:10b::cccc | 2001:4c91:1::250 | icmp6-echo | honored | 2026-09-23T11:59:58Z |
| duseldorf | 2a06:d1c1:10d::aaaa | 2001:4c91:1::250 | icmp6-echo | honored | 2026-09-23T11:59:58Z |
| go6lab | 2a00:8642:42::75 | 2001:4c91:1::250 | icmp6-echo | no_echo | 2026-09-23T12:00:29Z |
| karsolink | 2a12:d8c0:105a:9001::a154 | 2001:4c91:1::250 | icmp6-echo | honored | 2026-09-23T11:59:59Z |
| odin | 2607:fae0:a000::42 | 2001:4c91:1::250 | icmp6-echo | honored | 2026-09-23T11:59:57Z |
| t2 | 2a01:261:313:b814:2a0:98ff:fe5b:13e4 | 2001:4c91:1::250 | icmp6-echo | no_echo | 2026-09-23T11:59:59Z |
Attempt log (belgrade):
icmp6-echo→ honored (honored by fragmenting its reply into 2 via the IPv6 Fragment Header, rather than resizing)dns-tcp→ inconclusive (reply 170 B before PTB): max DNS-over-TCP segment 170B; not big enough to test PMTU shrinktls→ 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→ inconclusive (reply 170 B before PTB): max DNS-over-TCP segment 170B; not big enough to test PMTU shrinktls→ 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→ inconclusive (reply 114 B before PTB): max DNS-over-TCP segment 114B; not big enough to test PMTU shrinktls→ no_tcp: TLS connect failedhttp→ no_tcp: tcp/80 not open
Attempt log (go6lab):
icmp6-echo→ no_echo: no Echo Reply to 1300-byte probedns-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→ inconclusive (reply 114 B before PTB): max DNS-over-TCP segment 114B; not big enough to test PMTU shrinktls→ 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→ inconclusive (reply 156 B before PTB): max DNS-over-TCP segment 156B; not big enough to test PMTU shrinktls→ no_tcp: TLS connect failedhttp→ no_tcp: tcp/80 not open
Attempt log (t2):
icmp6-echo→ no_echo: no Echo Reply to 1300-byte probedns-tcp→ no_tcp: connect failed: timed outtls→ 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→ verdictno_echo - karsolink: probe
icmp6-echo→ verdicthonored - odin: probe
icmp6-echo→ verdicthonored - t2: probe
icmp6-echo→ verdictno_echo
Full per-method matrix (all four methods run at each vantage):
| vantage | icmp6-echo | dns-tcp | tls | http |
|---|---|---|---|---|
| belgrade | honored | inconclusive | no_tcp | no_tcp |
| berlin | honored | inconclusive | no_tcp | no_tcp |
| duseldorf | honored | inconclusive | no_tcp | no_tcp |
| go6lab | no_echo | no_tcp | no_tcp | no_tcp |
| karsolink | honored | inconclusive | no_tcp | no_tcp |
| odin | honored | inconclusive | no_tcp | no_tcp |
| t2 | no_echo | 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 ASes (ranked by how often they appear at the divergence point on the path of the worse-classifying vantage): AS6939, AS35612.
- From belgrade (open/Type-2=honored) the path enters AS35612 at hop 8; from berlin (open/Type-2=honored) the same hop is in AS6939. Last common AS: AS35612. The disagreement is most likely rooted in one of those two transit ASes.
- From belgrade (open/Type-2=honored) the path enters an opaque hop at hop 14; from duseldorf (open/Type-2=honored) the same hop is in AS35612. Last common AS: AS35612. The disagreement is most likely rooted in one of those two transit ASes.
- From belgrade (open/Type-2=honored) the path enters AS35612 at hop 9; from karsolink (open/Type-2=honored) the same hop is in an opaque hop. Last common AS: AS35612. The disagreement is most likely rooted in one of those two transit ASes.
- From belgrade (open/Type-2=honored) the path enters an opaque hop at hop 12; from odin (open/Type-2=honored) the same hop is in AS35612. Last common AS: AS35612. The disagreement is most likely rooted in one of those two transit ASes.
- From berlin (open/Type-2=honored) the path enters an opaque hop at hop 14; from duseldorf (open/Type-2=honored) the same hop is in AS35612. Last common AS: AS35612. The disagreement is most likely rooted in one of those two transit ASes.
- From berlin (open/Type-2=honored) the path enters AS6939 at hop 7; from go6lab (all_blocked/Type-2=no_echo) 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 (open/Type-2=honored) the path enters AS6939 at hop 7; from karsolink (open/Type-2=honored) the same hop is in AS35612. Last common AS: AS35612. The disagreement is most likely rooted in one of those two transit ASes.
- From berlin (open/Type-2=honored) the path enters AS6939 at hop 7; from odin (open/Type-2=honored) the same hop is in an opaque hop. Last common AS: AS35612. The disagreement is most likely rooted in one of those two transit ASes.
- From berlin (open/Type-2=honored) the path enters AS6939 at hop 7; from t2 (all_blocked/Type-2=no_echo) 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 (open/Type-2=honored) the path enters AS35612 at hop 14; from karsolink (open/Type-2=honored) the same hop is in an opaque hop. Last common AS: AS35612. The disagreement is most likely rooted in one of those two transit ASes.
- From duseldorf (open/Type-2=honored) the path enters AS35612 at hop 14; from odin (open/Type-2=honored) the same hop is in an opaque hop. Last common AS: AS35612. The disagreement is most likely rooted in one of those two transit ASes.
- From go6lab (all_blocked/Type-2=no_echo) the path enters AS6939 at hop 6; from karsolink (open/Type-2=honored) the same hop is in AS35612. Last common AS: no shared transit. The disagreement is most likely rooted in one of those two transit ASes.
- From go6lab (all_blocked/Type-2=no_echo) the path enters AS6939 at hop 5; from odin (open/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 karsolink (open/Type-2=honored) the path enters AS35612 at hop 6; from odin (open/Type-2=honored) the same hop is in AS6939. Last common AS: AS35612. The disagreement is most likely rooted in one of those two transit ASes.
- From karsolink (open/Type-2=honored) the path enters AS35612 at hop 6; from t2 (all_blocked/Type-2=no_echo) the same hop is in AS6939. Last common AS: no shared transit. The disagreement is most likely rooted in one of those two transit ASes.
- From odin (open/Type-2=honored) the path enters an opaque hop at hop 5; from t2 (all_blocked/Type-2=no_echo) the same hop is in AS6939. 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) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
4/4
Echo small (56B) 26.5ms
4/4
Echo 1500B (DF) 26.5ms
no
Type 1 dest-unreach
-
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | 2a09:ab81::1 | 0.3ms | 0%* | AS60733 | PERKE-NET - ZORAN PEROVIC trading as Agencija Perke.NET, RS |
| 2 | sox-pn.sox.rs 2001:7f8:1e:8::3a | 0.5ms | 0% | AS13004 | SOX - Serbian Open Exchange DOO, RS |
| 3 | * | - | 80% | - | |
| 4 | * | - | 70% | - | |
| 5 | 100ge0-0-0-2.core1.vie1.he.net 2001:470:0:412::1 | 12.4ms | 50% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 6 | * | - | - | - | |
| 7 | eolo-v6.mix-it.net @MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO 2001:7f8:b:100:1d1:a5d3:5612:114 | 29.4ms | 0% | - | NA |
| 8 | 2001:4c90:0:3::1:1cb | 28.6ms | 0% | AS35612 | NGI-AS - EOLO S.p.A., IT |
| 9 | 2001:4c90:0:3::1:1cb | 28.6ms | 0% | AS35612 | NGI-AS - EOLO S.p.A., IT |
| 10 | 2001:4c90:0:3::1:69 | 27.4ms | 70% | AS35612 | NGI-AS - EOLO S.p.A., IT |
| 11 | 2001:4c90:0:3::1:69 | 27.3ms | 0% | AS35612 | NGI-AS - EOLO S.p.A., IT |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - | |
| 18 | * | - | - | - | |
| 19 | * | - | - | - |
Rate-limited ICMPv6: hop 3, hop 4, hop 5, hop 10 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.013ms pmtu 1500
1: _gateway 0.516ms
1: _gateway 0.677ms
2: sox-pn.sox.rs 0.378ms
3: e0-33.core2.beg1.he.net 1.723ms
4: e0-34.core2.bts1.he.net 8.760ms
5: 100ge0-0-0-2.core1.vie1.he.net 10.852ms
6: no reply
7: eolo-v6.mix-it.net 28.334ms asymm 5
8: 2001:4c90:0:3::1:1cb 29.306ms asymm 7
9: 2001:4c90:0:3::1:1ba 27.299ms asymm 8
10: 2001:4c90:0:3::1:1ba 27.440ms asymm 8
11: 2001:4c90:0:3::1:69 27.752ms asymm 9
12: no reply
13: no reply
14: no reply
15: no reply
16: no reply
17: no reply
18: no reply
19: 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) 21.8ms
4/4
Echo 1500B (DF) 21.9ms
no
Type 1 dest-unreach
-
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 | 0.6ms | 0%* | AS59645 | WYBT-NET - Tobias Fiebig, DE |
| 3 | hurricane-electric.bcix.de 2001:7f8:19:1::1b1b:1 | 16.8ms | 10% | - | NA |
| 4 | * | - | - | - | |
| 5 | be47.core1.prg1.he.net 2001:470:e:67::2 | 19.4ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 6 | * | - | 60% | - | |
| 7 | be10.core1.zrh2.he.net 2001:470:e:153::2 | 19.2ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 8 | be1.core1.mil2.he.net 2001:470:e:dd::1 | 24.9ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 9 | * | - | - | - | |
| 10 | eolo-v6.mix-it.net @MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO 2001:7f8:b:100:1d1:a5d3:5612:114 | 24.6ms | - | - | NA |
| 11 | 2001:4c90:0:3::1:1cb | 25.0ms | 0% | AS35612 | NGI-AS - EOLO S.p.A., IT |
| 12 | 2001:4c90:0:3::1:1c0 | 24.9ms | 50% | AS35612 | NGI-AS - EOLO S.p.A., IT |
| 13 | 2001:4c90:0:3::1:1e0 | 23.0ms | 40% | AS35612 | NGI-AS - EOLO S.p.A., IT |
| 14 | * | - | 0% | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - | |
| 18 | * | - | - | - | |
| 19 | * | - | - | - |
Rate-limited ICMPv6: hop 3, hop 6, hop 12, hop 13 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.021ms pmtu 1500
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.473ms
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.360ms
2: ae0-2453.cr10.ber01.lwlcom.net 0.798ms
3: hurricane-electric.bcix.de 18.090ms asymm 6
4: no reply
5: be47.core1.prg1.he.net 15.413ms asymm 6
6: no reply
7: be10.core1.zrh2.he.net 20.261ms asymm 6
8: be1.core1.mil2.he.net 25.779ms asymm 7
9: no reply
10: eolo-v6.mix-it.net 24.407ms asymm 11
11: 2001:4c90:0:3::1:1d4 25.021ms asymm 12
12: 2001:4c90:0:3::1:1c0 25.392ms asymm 13
13: 2001:4c90:0:3::1:69 22.468ms asymm 15
14: 2001:4c90:0:3::1:69 22.366ms asymm 15
15: no reply
16: no reply
17: no reply
18: no reply
19: 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) 20.8ms
4/4
Echo 1500B (DF) 20.7ms
no
Type 1 dest-unreach
-
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 | 14.8ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 3 | lag10-h5f01.agr4-dus1.bb.wiit.network 2001:4ba0:ffe9:7c::1 | 159.5ms | 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 | lag0-vl1011.core1-fra-ix.bb.wiit.network 2001:4ba0:ffe9:8a::2 | 4.1ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 6 | lag0-vl1001.core1-nbg-ncd.bb.wiit.network 2001:4ba0:ffe9:103e::1 | 6.8ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 7 | lag0-vl6.core2-nbg-ncd.bb.wiit.network 2001:4ba0:ffe9:103b::1 | 6.9ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 8 | 2001:4ba0:ffe9:b8 | 9.6ms | 0% | - | |
| 9 | lag0-vl1009.core1-muc-eq3.bb.wiit.network 2001:4ba0:ffe9:a7::1 | 9.7ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 10 | lag0-vl1001.core1-pda-vsix.bb.wiit.network 2001:4ba0:ffe9:da::2 | 20.2ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 11 | lag0-vl1001.core1-mil-mix.bb.wiit.network 2001:4ba0:ffe9:db::2 | 20.2ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 12 | eolo-v6.mix-it.net @MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO 2001:7f8:b:100:1d1:a5d3:5612:114 | 22.7ms | 0% | - | NA |
| 13 | 2001:4c90:0:3::1:1b8 | 23.6ms | 0% | AS35612 | NGI-AS - EOLO S.p.A., IT |
| 14 | 2001:4c90:0:3::1:1aa | 22.5ms | 0% | AS35612 | NGI-AS - EOLO S.p.A., IT |
| 15 | 2001:4c90:0:3::1:1ba | 20.8ms | 0% | AS35612 | NGI-AS - EOLO S.p.A., IT |
| 16 | 2001:4c90:0:3::1:69 | 21.0ms | 60% | AS35612 | NGI-AS - EOLO S.p.A., IT |
| 17 | * | - | 0% | - | |
| 18 | * | - | - | - | |
| 19 | * | - | - | - |
Rate-limited ICMPv6: hop 16 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.015ms pmtu 1500
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.355ms
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.707ms
2: eth1-0-12-h5594.edge5-dus1.bb.wiit.network 5.091ms
3: no reply
4: lag30.core3-dus1.bb.wiit.network 0.310ms
5: lag0-vl1011.core1-fra-ix.bb.wiit.network 4.461ms
6: lag0-vl1001.core1-nbg-ncd.bb.wiit.network 6.823ms
7: lag0-vl6.core2-nbg-ncd.bb.wiit.network 6.786ms
8: lag0-vl1006.core2-muc2.bb.wiit.network 9.394ms
9: lag0-vl1009.core1-muc-eq3.bb.wiit.network 9.585ms
10: lag0-vl1001.core1-pda-vsix.bb.wiit.network 20.255ms
11: lag0-vl1001.core1-mil-mix.bb.wiit.network 20.309ms asymm 9
12: eolo-v6.mix-it.net 21.977ms asymm 10
13: 2001:4c90:0:3::1:1cf 22.290ms asymm 11
14: 2001:4c90:0:3::1:1d2 21.412ms asymm 12
15: 2001:4c90:0:3::1:1e0 21.574ms asymm 13
16: 2001:4c90:0:3::1:69 20.913ms asymm 14
17: no reply
18: no reply
19: no reply
Too many hops: pmtu 1500
Resume: pmtu 1500 From NL host (go6lab) all blocked
filter likely at: before path completes · min PMTU on path: 1500
0/4
Echo small (56B) -
0/4
Echo 1500B (DF) -
no
Type 1 dest-unreach
-
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | 2a00:8642:42::2 | 0.3ms | 0% | AS203993 | GNA-DC1-AS - S.J.M. Steffann, NL |
| 2 | gw.friends.steffann.nl 2a00:8642:1000:f000::1 | 4.9ms | 0%* | AS203993 | GNA-DC1-AS - S.J.M. Steffann, NL |
| 3 | speed-ix.he.net 2001:7f8:b7::a500:6939:1 | 9.6ms | 10% | - | NA |
| 4 | be2.core4.fra1.he.net 2001:470:e:38::2 | 14.7ms | 30% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 5 | be10.core1.zrh2.he.net 2001:470:e:153::2 | 19.7ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 6 | be1.core1.mil2.he.net 2001:470:e:dd::1 | 21.2ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 7 | * | - | - | - | |
| 8 | eolo-v6.mix-it.net @MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO 2001:7f8:b:100:1d1:a5d3:5612:114 | 23.8ms | 0% | - | NA |
| 9 | * | - | 0% | - | |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - | |
| 18 | * | - | - | - | |
| 19 | * | - | - | - |
Rate-limited ICMPv6: hop 3, hop 4 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.283ms pmtu 1500
1: 2a00:8642:42::2 6.112ms
1: 2a00:8642:42::2 3.372ms
2: gw.friends.steffann.nl 7.034ms
3: speed-ix.he.net 7.789ms
4: be2.core4.fra1.he.net 16.704ms
5: be10.core1.zrh2.he.net 21.922ms
6: be1.core1.mil2.he.net 30.345ms
7: no reply
8: eolo-v6.mix-it.net 23.603ms
9: 2001:4c90:0:3::1:1cf 19.061ms
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
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) 12.7ms
3/4
Echo 1500B (DF) 28.6ms
no
Type 1 dest-unreach
-
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | * | - | - | - | |
| 2 | * | - | - | - | |
| 3 | * | - | - | - | |
| 4 | eolo-v6.mix-it.net @MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO 2001:7f8:b:100:1d1:a5d3:5612:114 | 11.4ms | 0% | - | NA |
| 5 | 2001:4c90:0:3::1:7f | 16.0ms | 0% | AS35612 | NGI-AS - EOLO S.p.A., IT |
| 6 | 2001:4c90:0:3::1:1e0 | 13.1ms | 0% | AS35612 | NGI-AS - EOLO S.p.A., IT |
| 7 | 2001:4c90:0:3::1:1ba | 9.2ms | 0% | AS35612 | NGI-AS - EOLO S.p.A., IT |
| 8 | 2001:4c90:0:3::1:69 | 9.6ms | 0% | AS35612 | NGI-AS - EOLO S.p.A., IT |
| 9 | * | - | - | - | |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - | |
| 18 | * | - | - | - | |
| 19 | * | - | - | - |
tracepath -6
1?: [LOCALHOST] 0.029ms pmtu 1500
1: no reply
2: no reply
3: 2a12:d8c0:109f:106::a2 3.420ms
4: eolo.topix.it 13.556ms
5: 2001:4c90:0:3::1:7f 13.664ms asymm 6
6: 2001:4c90:0:3::1:1e0 13.611ms asymm 7
7: 2001:4c90:0:3::1:69 12.892ms asymm 8
8: 2001:4c90:0:3::1:69 9.857ms
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
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) 10.7ms
4/4
Echo 1500B (DF) 10.8ms
no
Type 1 dest-unreach
-
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 | 2a03:a100:0:201:1::1 | 0.7ms | 40% | AS56635 | XENYA - XENYA inzeniring, proizvodnja in trgovina, d.o.o. Ljubljana, SI |
| 4 | e0-1.core1.lju1.he.net 2001:470:1:5be::1 | 1.8ms | 30% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 5 | * | - | - | - | |
| 6 | port-channel1.core1.zag2.he.net 2001:470:0:2ea::2 | 4.2ms | 90% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 7 | * | - | - | - | |
| 8 | * | - | 0% | - | |
| 9 | 2001:4c90:0:3::1:1d4 | 12.8ms | 0% | AS35612 | NGI-AS - EOLO S.p.A., IT |
| 10 | 2001:4c90:0:3::1:1ba | 11.7ms | 0% | AS35612 | NGI-AS - EOLO S.p.A., IT |
| 11 | 2001:4c90:0:3::1:1e0 | 11.6ms | 0% | AS35612 | NGI-AS - EOLO S.p.A., IT |
| 12 | 2001:4c90:0:3::1:69 | 11.8ms | 0% | AS35612 | NGI-AS - EOLO S.p.A., IT |
| 13 | * | - | 0% | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - | |
| 18 | * | - | - | - | |
| 19 | * | - | - | - |
Rate-limited ICMPv6: hop 3, hop 4, hop 6 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.032ms pmtu 9000
1: fw1-lju.6connect.com 0.730ms
1: fw1-lju.6connect.com 0.651ms
2: no reply
3: 2a03:a100:0:201:1::1 1.252ms
4: 2a03:a100:0:201:1::1 1.187ms pmtu 1500
4: e0-1.core1.lju1.he.net 2.432ms
5: no reply
6: no reply
7: no reply
8: eolo-v6.mix-it.net 14.666ms
9: 2001:4c90:0:3::1:1d4 14.562ms asymm 7
10: 2001:4c90:0:3::1:1c0 13.963ms asymm 7
11: 2001:4c90:0:3::1:69 11.462ms asymm 10
12: 2001:4c90:0:3::1:69 11.822ms asymm 10
13: no reply
14: no reply
15: no reply
16: no reply
17: no reply
18: no reply
19: no reply
Too many hops: pmtu 1500From SLO host (T-2) all blocked
filter likely at: before path completes · min PMTU on path: 1500
0/4
Echo small (56B) -
0/4
Echo 1500B (DF) -
no
Type 1 dest-unreach
-
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | * | - | 0%* | - | |
| 2 | 2a01:260:1::225 | 2.6ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 3 | 2a01-260-1-1--9a.core6.t-2.net 2a01:260:1:1::9a | 2.0ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 4 | 2a01-260-1-1--38.core6.t-2.net 2a01:260:1:1::38 | 2.6ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 5 | port-channel1.core1.zag2.he.net 2001:470:0:2ea::2 | 9.8ms | - | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 6 | port-channel1.core1.zag2.he.net 2001:470:0:2ea::2 | 9.6ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 7 | eolo-v6.mix-it.net @MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO 2001:7f8:b:100:1d1:a5d3:5612:114 | 17.0ms | - | - | NA |
| 8 | eolo-v6.mix-it.net @MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO 2001:7f8:b:100:1d1:a5d3:5612:114 | 18.8ms | - | - | NA |
| 9 | * | - | - | - | |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - | |
| 17 | * | - | - | - | |
| 18 | * | - | - | - | |
| 19 | * | - | - | - |
tracepath -6
1?: [LOCALHOST] 0.028ms pmtu 1500
1: 2a01:261:313:b814::1 0.627ms
1: 2a01:261:313:b814::1 0.396ms
2: 2a01:260:1::225 2.443ms
3: 2a01-260-1-1--9c.core6.t-2.net 2.195ms
4: 2a01-260-1-1--38.core6.t-2.net 3.623ms asymm 3
5: port-channel1.core1.zag2.he.net 9.636ms asymm 7
6: port-channel1.core1.zag2.he.net 10.335ms asymm 7
7: no reply
8: eolo-v6.mix-it.net 19.030ms asymm 7
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
Too many hops: pmtu 1500
Resume: pmtu 1500