AS overview
Test target: 2a0c:4c00::1 · static prefix probe · address space: PA · prefixes announced: 1
prefix(es): 2a0c:4c00::/29
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 | ||
2a0c:4c00::1 | prb | ✓ | ✓ | ? | ? | ✓ | ✓ | ✓ | ? | ? | ✓ | ✓ | ✓ | ? | ? | ✓ | ✗ | ✗ | ? | ? | - | ✓ | ✓ | ? | ? | ✓ | ✓ | ✓ | ? | ? | ✓ | ✓ | ✓ | ? | ? | ✓ |
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 2017-11-21. IPv6 LAN: 2001:7f8:b:100:1d1:a520:5260:11. Locations: -.
RPKI & ASPA
1 of 1 prefix(es) covered by a valid ROA.
| Prefix | RPKI state | Reason | Covering VRP(s) |
|---|---|---|---|
2a0c:4c00::/29 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS205260 /29 maxLen 29 (ripe) |
Random-IP probe (yarrp) into the AS' prefixes
We probed 35 arbitrary IPv6 address(es) inside AS205260's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2001:978:2:40::3:1 at hop 24 - that router answers ICMPv6 Echo. This is not in AS205260'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): Type 2 honored. Forged PTB accepted; next response shrunk. (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 | 2a0c:4c00::1 | icmp6-echo | honored | 2026-09-23T12:07:01Z |
| berlin | 2a06:d1c1:10b::cccc | 2a0c:4c00::1 | icmp6-echo | honored | 2026-09-23T12:06:58Z |
| duseldorf | 2a06:d1c1:10d::aaaa | 2a0c:4c00::1 | icmp6-echo | honored | 2026-09-23T12:06:57Z |
| go6lab | 2a00:8642:42::75 | 2a0c:4c00::1 | icmp6-echo | no_echo | 2026-09-23T12:08:29Z |
| karsolink | 2a12:d8c0:105a:9001::a154 | 2a0c:4c00::1 | icmp6-echo | honored | 2026-09-23T12:06:59Z |
| odin | 2607:fae0:a000::42 | 2a0c:4c00::1 | icmp6-echo | honored | 2026-09-23T12:06:57Z |
| t2 | 2a01:261:313:b814:2a0:98ff:fe5b:13e4 | 2a0c:4c00::1 | icmp6-echo | honored | 2026-09-23T12:06:59Z |
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: timed outtls→ 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: timed outtls→ 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: timed outtls→ 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: [Errno 101] Network is unreachabletls→ 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: timed outtls→ 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: timed outtls→ 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: 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→ 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 | no_echo | 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 ASes (ranked by how often they appear at the divergence point on the path of the worse-classifying vantage): AS205260, AS6939, AS50673.
- From belgrade (open/Type-2=honored) the path enters an opaque hop at hop 13; from berlin (open/Type-2=honored) the same hop is in AS205260. Last common AS: AS205260. 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 duseldorf (open/Type-2=honored) the same hop is in AS205260. Last common AS: AS205260. The disagreement is most likely rooted in one of those two transit ASes.
- From belgrade (open/Type-2=honored) the path enters AS205260 at hop 7; from karsolink (open/Type-2=honored) the same hop is in an opaque hop. Last common AS: AS205260. 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 8; from odin (open/Type-2=honored) the same hop is in AS205260. Last common AS: AS205260. The disagreement is most likely rooted in one of those two transit ASes.
- From belgrade (open/Type-2=honored) the path enters AS205260 at hop 7; from t2 (open/Type-2=honored) the same hop is in AS6939. Last common AS: AS205260. The disagreement is most likely rooted in one of those two transit ASes.
- From berlin (open/Type-2=honored) the path enters AS205260 at hop 13; from duseldorf (open/Type-2=honored) the same hop is in an opaque hop. Last common AS: AS205260. The disagreement is most likely rooted in one of those two transit ASes.
- From berlin (open/Type-2=honored) the path enters AS205260 at hop 13; from karsolink (open/Type-2=honored) the same hop is in an opaque hop. Last common AS: AS205260. The disagreement is most likely rooted in one of those two transit ASes.
- From berlin (open/Type-2=honored) the path enters AS205260 at hop 13; from odin (open/Type-2=honored) the same hop is in an opaque hop. Last common AS: AS205260. The disagreement is most likely rooted in one of those two transit ASes.
- From berlin (open/Type-2=honored) the path enters AS205260 at hop 13; from t2 (open/Type-2=honored) the same hop is in an opaque hop. Last common AS: AS205260. The disagreement is most likely rooted in one of those two transit ASes.
- From duseldorf (open/Type-2=honored) the path enters AS205260 at hop 12; from karsolink (open/Type-2=honored) the same hop is in an opaque hop. Last common AS: AS205260. The disagreement is most likely rooted in one of those two transit ASes.
- From duseldorf (open/Type-2=honored) the path enters AS205260 at hop 12; from odin (open/Type-2=honored) the same hop is in an opaque hop. Last common AS: AS205260. The disagreement is most likely rooted in one of those two transit ASes.
- From duseldorf (open/Type-2=honored) the path enters AS205260 at hop 12; from t2 (open/Type-2=honored) the same hop is in an opaque hop. Last common AS: AS205260. The disagreement is most likely rooted in one of those two transit ASes.
- From go6lab (all_blocked/Type-2=no_echo) the path enters AS50673 at hop 4; from karsolink (open/Type-2=honored) the same hop is in AS205260. 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 AS50673 at hop 3; from odin (open/Type-2=honored) the same hop is in AS56635. 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 AS174 at hop 5; from t2 (open/Type-2=honored) 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 karsolink (open/Type-2=honored) the path enters AS205260 at hop 4; from odin (open/Type-2=honored) the same hop is in AS6939. Last common AS: AS205260. The disagreement is most likely rooted in one of those two transit ASes.
- From karsolink (open/Type-2=honored) the path enters an opaque hop at hop 10; from t2 (open/Type-2=honored) the same hop is in AS205260. Last common AS: AS205260. 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 (open/Type-2=honored) the same hop is in AS6939. Last common AS: AS205260. 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
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
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | 2a09:ab81::1 | 0.5ms | 0%* | AS60733 | PERKE-NET - ZORAN PEROVIC trading as Agencija Perke.NET, RS |
| 2 | sox-pn.sox.rs 2001:7f8:1e:8::3a | 0.2ms | 0% | AS13004 | SOX - Serbian Open Exchange DOO, RS |
| 3 | e0-33.core2.beg1.he.net 2001:470:1:6e5::1 | 1.1ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 4 | e0-34.core2.bts1.he.net 2001:470:0:33f::2 | 8.4ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 5 | * | - | 20% | - | |
| 6 | * | - | - | - | |
| 7 | 2a0c:4c00::1 | 26.1ms | 0% | AS205260 | Wolnet - Wolnet SRL, IT |
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: _gateway 0.393ms
1: _gateway 0.560ms
2: sox-pn.sox.rs 0.684ms
3: e0-33.core2.beg1.he.net 1.293ms
4: e0-34.core2.bts1.he.net 9.068ms
5: 100ge0-0-0-2.core1.vie1.he.net 11.300ms
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
Too many hops: pmtu 1500
Resume: pmtu 1500 From DE host (Berlin) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
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 | xe-0-0-12-2412.gw01.dus01.as59645.net 2a06:d1c0::dead:beef:401 | 8.2ms | 0% | AS59645 | WYBT-NET - Tobias Fiebig, DE |
| 3 | eth1-0-12-h5594.edge5-dus1.bb.wiit.network 2001:4ba0:92f4:3::1 | 9.1ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 4 | * | - | - | - | |
| 5 | lag30.core3-dus1.bb.wiit.network 2001:4ba0:ffe9:109::2 | 8.4ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 6 | lag0-vl1011.core1-fra-ix.bb.wiit.network 2001:4ba0:ffe9:8a::2 | 12.3ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 7 | lag0-vl1001.core1-nbg-ncd.bb.wiit.network 2001:4ba0:ffe9:103e::1 | 15.0ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 8 | lag0-vl6.core2-nbg-ncd.bb.wiit.network 2001:4ba0:ffe9:103b::1 | 15.0ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 9 | 2001:4ba0:ffe9:b8 | 17.5ms | 0% | - | |
| 10 | lag0-vl1009.core1-muc-eq3.bb.wiit.network 2001:4ba0:ffe9:a7::1 | 17.9ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 11 | lag0-vl1001.core1-pda-vsix.bb.wiit.network 2001:4ba0:ffe9:da::2 | 28.3ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 12 | lag0-vl1001.core1-mil-mix.bb.wiit.network 2001:4ba0:ffe9:db::2 | 28.3ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 13 | 2a0c:4c00::1 | 28.2ms | 0% | AS205260 | Wolnet - Wolnet SRL, IT |
tracepath -6
1?: [LOCALHOST] 0.032ms pmtu 1500
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.480ms
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.355ms
2: xe-0-0-12-2412.gw01.dus01.as59645.net 8.461ms
3: eth1-0-12-h5594.edge5-dus1.bb.wiit.network 9.382ms
4: no reply
5: lag30.core3-dus1.bb.wiit.network 8.511ms
6: lag0-vl1011.core1-fra-ix.bb.wiit.network 13.091ms
7: lag0-vl1001.core1-nbg-ncd.bb.wiit.network 16.006ms
8: lag0-vl6.core2-nbg-ncd.bb.wiit.network 15.402ms
9: lag0-vl1006.core2-muc2.bb.wiit.network 17.838ms
10: lag0-vl1009.core1-muc-eq3.bb.wiit.network 18.155ms
11: lag0-vl1001.core1-pda-vsix.bb.wiit.network 28.725ms
12: lag0-vl1001.core1-mil-mix.bb.wiit.network 28.442ms asymm 10
13: no reply
14: no reply
15: no reply
16: 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
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 | 0.2ms | 0%* | AS59645 | WYBT-NET - Tobias Fiebig, DE |
| 2 | eth1-0-12-h5594.edge5-dus1.bb.wiit.network 2001:4ba0:92f4:3::1 | 1.0ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 3 | * | - | - | - | |
| 4 | lag11.core3-dus1.bb.wiit.network 2001:4ba0:ffe9:115::3 | 0.2ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 5 | lag0-vl1011.core1-fra-ix.bb.wiit.network 2001:4ba0:ffe9:8a::2 | 4.3ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 6 | lag0-vl1001.core1-nbg-ncd.bb.wiit.network 2001:4ba0:ffe9:103e::1 | 6.9ms | 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 | 9.8ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 10 | lag0-vl1001.core1-pda-vsix.bb.wiit.network 2001:4ba0:ffe9:da::2 | 20.3ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 11 | lag0-vl1001.core1-mil-mix.bb.wiit.network 2001:4ba0:ffe9:db::2 | 20.3ms | 0% | AS24961 | MYLOC-AS - WIIT AG, DE |
| 12 | 2a0c:4c00::1 | 20.1ms | 0% | AS205260 | Wolnet - Wolnet SRL, IT |
tracepath -6
1?: [LOCALHOST] 0.013ms pmtu 1500
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.340ms
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.272ms
2: eth1-0-12-h5594.edge5-dus1.bb.wiit.network 1.231ms
3: no reply
4: lag30.core3-dus1.bb.wiit.network 0.434ms
5: lag0-vl1011.core1-fra-ix.bb.wiit.network 4.598ms
6: lag0-vl1001.core1-nbg-ncd.bb.wiit.network 7.138ms
7: lag0-vl6.core2-nbg-ncd.bb.wiit.network 6.998ms
8: lag0-vl1006.core2-muc2.bb.wiit.network 9.636ms
9: lag0-vl1009.core1-muc-eq3.bb.wiit.network 10.027ms
10: lag0-vl1001.core1-pda-vsix.bb.wiit.network 20.359ms
11: lag0-vl1001.core1-mil-mix.bb.wiit.network 20.386ms asymm 9
12: no reply
13: no reply
14: no reply
15: no reply
16: no reply
Too many hops: pmtu 1500
Resume: pmtu 1500 From NL host (go6lab) all blocked
filter likely at: past AS174 (COGENT-174) · min PMTU on path: 1500
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 | * | - | 0%* | - | |
| 3 | 2a00:1ca8:1::194 | 7.9ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 4 | 2a03:3f40::10:41 | 4.7ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 5 | 2001:978:2:40::3:1 | 7.2ms | 0% | AS174 | COGENT-174 - Cogent Communications, LLC, US |
tracepath -6
1?: [LOCALHOST] 0.029ms pmtu 1500
1: 2a00:8642:42::2 1.689ms
1: 2a00:8642:42::2 3.298ms
2: gw.friends.steffann.nl 3.034ms
3: 2a00:1ca8:1::194 4.314ms
4: 2a03:3f40::10:41 3.732ms
5: 2001:978:2:40::3:1 7.788ms !N
Resume: pmtu 1500 From ITA host (Karsolink) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
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 | 0%* | AS204471 | KARSOLINK - 2S Computers SRL, IT |
| 2 | 2a12:d8c0:109f:121::a1 | 0.3ms | 0%* | AS204471 | KARSOLINK - 2S Computers SRL, IT |
| 3 | 2a12:d8c0:101f:103::1 | 8.6ms | 60% | AS204471 | KARSOLINK - 2S Computers SRL, IT |
| 4 | 2a0c:4c00::1 | 8.6ms | 0% | AS205260 | Wolnet - Wolnet SRL, IT |
Rate-limited ICMPv6: hop 3 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.046ms pmtu 1500
1: no reply
2: 2a12:d8c0:109f:121::a1 1.116ms
3: no reply
4: no reply
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
Too many hops: pmtu 1500
Resume: pmtu 1500 From SLO host (6connect) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
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 | 0.6ms | 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 | 1.7ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 5 | * | - | - | - | |
| 6 | port-channel1.core1.zag2.he.net 2001:470:0:2ea::2 | 3.8ms | 30% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 7 | * | - | - | - | |
| 8 | 2a0c:4c00::1 | 12.3ms | 0% | AS205260 | Wolnet - Wolnet SRL, IT |
Rate-limited ICMPv6: hop 6 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.031ms pmtu 9000
1: fw1-lju.6connect.com 0.717ms
1: fw1-lju.6connect.com 0.591ms
2: no reply
3: 2a03:a100:0:201:1::1 1.227ms
4: 2a03:a100:0:201:1::1 1.017ms pmtu 1500
4: e0-1.core1.lju1.he.net 2.187ms
5: no reply
6: port-channel1.core1.zag2.he.net 4.216ms
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
Too many hops: pmtu 1500From SLO host (T-2) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | 2a01:261:313:b814::1 | 0.5ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 2 | 2a01:260:1::225 | 8.2ms | 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 | 2.3ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 4 | hurricane-electric.nikhef.nlsix.net 2001:7f8:13::a500:6939:1 | 34.8ms | 0%* | - | NA |
| 5 | be7.core2.fra2.he.net 2001:470:e:18::2 | 43.9ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 6 | be1.core2.fra2.he.net 2001:470:e:43::2 | 37.0ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 7 | be3.core4.fra1.he.net 2001:470:e:5a::2 | 42.0ms | 10% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 8 | be10.core1.zrh2.he.net 2001:470:e:153::2 | 55.1ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 9 | be1.core1.mil2.he.net 2001:470:e:dd::1 | 34.4ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 10 | 2a0c:4c00::1 | 36.6ms | - | AS205260 | Wolnet - Wolnet SRL, IT |
Rate-limited ICMPv6: hop 7 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.031ms pmtu 1500
1: 2a01:261:313:b814::1 1.121ms
1: no reply
2: 2a01:260:1::225 5.205ms
3: 2a01-260-1-1--9a.core6.t-2.net 2.803ms
4: 2a01-260-1-1--39.core6.t-2.net 2.984ms asymm 3
5: hurricane-electric.nikhef.nlsix.net 78.724ms asymm 4
6: be3.core4.fra1.he.net 43.065ms asymm 7
7: be10.core1.zrh2.he.net 49.858ms asymm 8
8: be10.core1.zrh2.he.net 50.791ms
9: be1.core1.mil2.he.net 39.953ms asymm 7
10: no reply
11: no reply
12: no reply
13: no reply
14: no reply
15: no reply
16: no reply
Too many hops: pmtu 1500
Resume: pmtu 1500