AS overview
Test target: 2a00:1860:1:1::5353 · a2.ns.lagis.at · address space: mixed · prefixes announced: 2
prefix(es): 2a00:1860::/32, 2602:810:2081::/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 | ||
2a00:1860:1:1::5353a2.ns.lagis.at | NS | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - | ✓ | ✓ | ? | ? | - |
VIX / AAIX / SAIX / TIROL-IX / ERA-IX peering
VIX / AAIX / SAIX / TIROL-IX / ERA-IX member - Open peering, peering member, since 2010-07-29. IPv6 LAN: 2001:7f8:30:0:2:1:3:5369. Locations: -.
RPKI & ASPA
1 of 2 prefix(es) covered by a valid ROA, 1 not-found.
| Prefix | RPKI state | Reason | Covering VRP(s) |
|---|---|---|---|
2a00:1860::/32 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS35369 /32 maxLen 32 (ripe) |
2602:810:2081::/48 | - not-found | no covering VRP |
Random-IP probe (yarrp) into the AS' prefixes
At least one router inside AS35369's announced prefix replied during the random-target probe. Hop(s): 2a00:1860:0:22::2, 2a00:1860:0:5::2, 2a00:1860:0:6::2, 2a00:1860:14c:1::7. These are candidate targets for direct testing.
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 1500B). (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 | 2a00:1860:1:1::5353 | icmp6-echo | honored | 2026-09-23T13:33:07Z |
| berlin | 2a06:d1c1:10b::cccc | 2a00:1860:1:1::5353 | icmp6-echo | honored | 2026-09-23T13:33:08Z |
| duseldorf | 2a06:d1c1:10d::aaaa | 2a00:1860:1:1::5353 | icmp6-echo | honored | 2026-09-23T13:33:08Z |
| go6lab | 2a00:8642:42::75 | 2a00:1860:1:1::5353 | icmp6-echo | inconclusive | 2026-09-23T13:33:26Z |
| karsolink | 2a12:d8c0:105a:9001::a154 | 2a00:1860:1:1::5353 | icmp6-echo | honored | 2026-09-23T13:33:01Z |
| odin | 2607:fae0:a000::42 | 2a00:1860:1:1::5353 | icmp6-echo | honored | 2026-09-23T13:33:09Z |
| t2 | 2a01:261:313:b814:2a0:98ff:fe5b:13e4 | 2a00:1860:1:1::5353 | icmp6-echo | honored | 2026-09-23T13:33:05Z |
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 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 (berlin):
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 (duseldorf):
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 (go6lab):
icmp6-echo→ inconclusive (reply 1460 B before PTB): no Echo Reply after PTB (probe 1500B)dns-tcp→ no_tcp: no DNS response datatls→ 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 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 (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→ 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
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 | inconclusive | no_tcp | no_tcp |
| berlin | honored | inconclusive | no_tcp | no_tcp |
| duseldorf | honored | inconclusive | no_tcp | no_tcp |
| go6lab | inconclusive | no_tcp | no_tcp | no_tcp |
| karsolink | honored | inconclusive | no_tcp | no_tcp |
| odin | honored | inconclusive | no_tcp | no_tcp |
| t2 | honored | inconclusive | 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): AS5405, AS8218, AS1764.
- From belgrade (open/Type-2=honored) the path enters AS1764 at hop 6; from duseldorf (open/Type-2=honored) the same hop is in AS5405. Last common AS: no shared transit. The disagreement is most likely rooted in one of those two transit ASes.
- From belgrade (open/Type-2=honored) the path enters AS1764 at hop 6; from go6lab (open/Type-2=inconclusive) the same hop is in AS5405. Last common AS: no shared transit. The disagreement is most likely rooted in one of those two transit ASes.
- From belgrade (open/Type-2=honored) the path enters AS1764 at hop 6; from karsolink (open/Type-2=honored) the same hop is in AS8218. Last common AS: no shared transit. The disagreement is most likely rooted in one of those two transit ASes.
- From belgrade (open/Type-2=honored) the path enters AS1764 at hop 6; from odin (open/Type-2=honored) the same hop is in AS8218. Last common AS: no shared transit. 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 t2 (open/Type-2=honored) the same hop is in AS1764. Last common AS: AS1764. The disagreement is most likely rooted in one of those two transit ASes.
- From berlin (open/Type-2=honored) the path enters AS8218 at hop 4; from duseldorf (open/Type-2=honored) the same hop is in AS5405. Last common AS: no shared transit. The disagreement is most likely rooted in one of those two transit ASes.
- From berlin (open/Type-2=honored) the path enters AS8218 at hop 4; from go6lab (open/Type-2=inconclusive) the same hop is in AS5405. Last common AS: no shared transit. 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 6; from karsolink (open/Type-2=honored) the same hop is in AS8218. Last common AS: AS8218. The disagreement is most likely rooted in one of those two transit ASes.
- From berlin (open/Type-2=honored) the path enters AS8218 at hop 4; from odin (open/Type-2=honored) the same hop is in AS5603. Last common AS: AS8218. The disagreement is most likely rooted in one of those two transit ASes.
- From duseldorf (open/Type-2=honored) the path enters an opaque hop at hop 9; from go6lab (open/Type-2=inconclusive) the same hop is in AS5405. Last common AS: AS5405. The disagreement is most likely rooted in one of those two transit ASes.
- From duseldorf (open/Type-2=honored) the path enters AS5405 at hop 6; from karsolink (open/Type-2=honored) the same hop is in AS8218. Last common AS: no shared transit. The disagreement is most likely rooted in one of those two transit ASes.
- From duseldorf (open/Type-2=honored) the path enters AS5405 at hop 4; from odin (open/Type-2=honored) the same hop is in AS5603. Last common AS: no shared transit. The disagreement is most likely rooted in one of those two transit ASes.
- From duseldorf (open/Type-2=honored) the path enters AS5405 at hop 8; from t2 (open/Type-2=honored) the same hop is in AS1764. Last common AS: no shared transit. The disagreement is most likely rooted in one of those two transit ASes.
- From go6lab (open/Type-2=inconclusive) the path enters AS5405 at hop 6; from karsolink (open/Type-2=honored) the same hop is in AS8218. Last common AS: no shared transit. The disagreement is most likely rooted in one of those two transit ASes.
- From go6lab (open/Type-2=inconclusive) the path enters AS5405 at hop 4; from odin (open/Type-2=honored) the same hop is in AS5603. Last common AS: no shared transit. The disagreement is most likely rooted in one of those two transit ASes.
- From go6lab (open/Type-2=inconclusive) the path enters AS5405 at hop 8; from t2 (open/Type-2=honored) the same hop is in AS1764. 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 an opaque hop at hop 7; from odin (open/Type-2=honored) the same hop is in AS8218. Last common AS: AS8218. The disagreement is most likely rooted in one of those two transit ASes.
- From karsolink (open/Type-2=honored) the path enters AS8218 at hop 8; from t2 (open/Type-2=honored) the same hop is in AS1764. Last common AS: no shared transit. 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) 15.7ms
1/4
Echo 1500B (DF) 15.7ms
no
Type 1 dest-unreach
-
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | 2a09:ab81::1 | 0.4ms | 0%* | AS60733 | PERKE-NET - ZORAN PEROVIC trading as Agencija Perke.NET, RS |
| 2 | sox-pn.sox.rs 2001:7f8:1e:8::3a | 0.4ms | 0% | AS13004 | SOX - Serbian Open Exchange DOO, RS |
| 3 | 2001:7f8:1e:8::3d | 0.4ms | 0% | AS13004 | SOX - Serbian Open Exchange DOO, RS |
| 4 | 2a02:2d8:0:a00e:232a | 11.2ms | 0% | - | |
| 5 | vix-ip6-et-0-1-2-0-r60.inx.vie.at.nextlayer.net @VIX / AAIX / SAIX / TIROL-IX / ERA-IX 2001:7f8:30:0:2:1:0:1764 | 17.8ms | 0% | - | NA |
| 6 | ip6-ae1-0-r32.inx.vie.nextlayer.net 2a01:190:1764:800c::1 | 13.3ms | 0% | AS1764 | NEXTLAYER-AS - Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH, AT |
| 7 | * | - | 0% | - | |
| 8 | * | - | 0% | - | |
| 9 | * | - | - | - | |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - |
tracepath -6
1?: [LOCALHOST] 0.021ms pmtu 1500
1: _gateway 0.446ms
1: _gateway 0.385ms
2: sox-pn.sox.rs 0.270ms
3: 2001:7f8:1e:8::3d 0.399ms asymm 2
4: ae8-930.RT.IRX.VIE.AT.retn.net 11.053ms asymm 3
5: 2001:7f8:30:0:2:1:0:8218 11.201ms asymm 3
6: ??? 16.488ms asymm 3
7: r10-as1764.core.lnz.net.lagis.at 14.659ms asymm 4
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
4/4
Echo small (56B) 21.4ms
4/4
Echo 1500B (DF) 21.4ms
no
Type 1 dest-unreach
-
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | * | - | 0%* | - | |
| 2 | ae0-2453.cr10.ber01.lwlcom.net 2a06:d1c0::dead:beef:1c02 | 0.5ms | 0%* | AS59645 | WYBT-NET - Tobias Fiebig, DE |
| 3 | zayoeurope.bcix.de 2001:7f8:19:1::201a:1 | 10.7ms | 0% | - | NA |
| 4 | 2001:1b48:2:2::6:2 | 17.9ms | 0% | AS8218 | NEO-ASN - Zayo Infrastructure France SA, FR |
| 5 | r11-as8218.core.lnz.net.lagis.at 2001:1b48:200:2::2 | 21.6ms | 0% | AS8218 | NEO-ASN - Zayo Infrastructure France SA, FR |
| 6 | * | - | 0% | - | |
| 7 | * | - | - | - | |
| 8 | * | - | - | - | |
| 9 | * | - | - | - | |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - |
tracepath -6
1?: [LOCALHOST] 0.020ms pmtu 1500
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.477ms
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.461ms
2: ae0-2453.cr10.ber01.lwlcom.net 0.725ms
3: zayoeurope.bcix.de 10.553ms asymm 8
4: 2001:1b48:2:2::6:2 18.381ms asymm 5
5: r11-as8218.core.lnz.net.lagis.at 21.636ms
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 (Düsseldorf) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
4/4
Echo small (56B) 23.0ms
4/4
Echo 1500B (DF) 23.0ms
no
Type 1 dest-unreach
-
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | * | - | 0%* | - | |
| 2 | 2001:7f8:9e::151d:0:1 | 0.4ms | 0% | - | NA |
| 3 | r4-fra2-de.as5405.net 2a11:4140::b | 13.7ms | 0% | AS5405 | INTERDOTLINK - Inter.link GmbH, DE |
| 4 | r7-fra1-de.as5405.net 2a11:4140::4c | 13.7ms | 0% | AS5405 | INTERDOTLINK - Inter.link GmbH, DE |
| 5 | r5-fra1-de.as5405.net 2a11:4140::42 | 13.7ms | 0% | AS5405 | INTERDOTLINK - Inter.link GmbH, DE |
| 6 | r2-vie1-at.as5405.net 2a11:4140::1e | 13.7ms | 0% | AS5405 | INTERDOTLINK - Inter.link GmbH, DE |
| 7 | r1-vie1-at.as5405.net 2a11:4140::1d | 13.7ms | 0% | AS5405 | INTERDOTLINK - Inter.link GmbH, DE |
| 8 | 2a11:4140:d002::13 | 23.2ms | 0% | AS5405 | INTERDOTLINK - Inter.link GmbH, DE |
| 9 | * | - | 0% | - | |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - |
tracepath -6
1?: [LOCALHOST] 0.014ms pmtu 1500
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.460ms
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.245ms
2: 2001:7f8:9e::151d:0:1 0.464ms asymm 3
3: r4-fra2-de.as5405.net 13.785ms asymm 12
4: r7-fra1-de.as5405.net 13.796ms asymm 11
5: r5-fra1-de.as5405.net 13.880ms asymm 10
6: r2-vie1-at.as5405.net 13.896ms asymm 9
7: r1-vie1-at.as5405.net 13.796ms asymm 8
8: 2a11:4140:d002::13 23.249ms asymm 6
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 NL host (go6lab) open
filter likely at: (none) · min PMTU on path: 1500
4/4
Echo small (56B) 27.6ms
3/4
Echo 1500B (DF) 27.6ms
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 | 2.2ms | 0% | AS203993 | GNA-DC1-AS - S.J.M. Steffann, NL |
| 2 | * | - | 0%* | - | |
| 3 | speed-ix.inter.link 2001:7f8:b7::a500:5405:1 | 4.9ms | 0% | - | NA |
| 4 | r5-ams1-nl.as5405.net 2a11:4140::41 | 23.5ms | 0% | AS5405 | INTERDOTLINK - Inter.link GmbH, DE |
| 5 | r7-ams1-nl.as5405.net 2a11:4140::55 | 24.5ms | 0% | AS5405 | INTERDOTLINK - Inter.link GmbH, DE |
| 6 | r7-fra1-de.as5405.net 2a11:4140::4c | 23.9ms | 0% | AS5405 | INTERDOTLINK - Inter.link GmbH, DE |
| 7 | r5-fra1-de.as5405.net 2a11:4140::42 | 23.9ms | 0% | AS5405 | INTERDOTLINK - Inter.link GmbH, DE |
| 8 | r2-vie1-at.as5405.net 2a11:4140::1e | 25.7ms | 0% | AS5405 | INTERDOTLINK - Inter.link GmbH, DE |
| 9 | r1-vie1-at.as5405.net 2a11:4140::1d | 23.4ms | 0% | AS5405 | INTERDOTLINK - Inter.link GmbH, DE |
| 10 | 2a11:4140:d002::13 | 26.6ms | 0% | AS5405 | INTERDOTLINK - Inter.link GmbH, DE |
| 11 | * | - | 0% | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - |
tracepath -6
1?: [LOCALHOST] 0.163ms pmtu 1500
1: 2a00:8642:42::2 2.595ms
1: 2a00:8642:42::2 2.500ms
2: no reply
3: speed-ix.inter.link 5.597ms asymm 4
4: r5-ams1-nl.as5405.net 26.468ms asymm 15
5: r7-ams1-nl.as5405.net 24.888ms asymm 14
6: r7-fra1-de.as5405.net 23.659ms asymm 13
7: r5-fra1-de.as5405.net 22.779ms asymm 12
8: r2-vie1-at.as5405.net 24.225ms asymm 11
9: r1-vie1-at.as5405.net 23.657ms asymm 10
10: 2a11:4140:d002::13 29.361ms
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 ITA host (Karsolink) openRFC 4890 ✓
filter likely at: (none) · min PMTU on path: 1500
4/4
Echo small (56B) 27.4ms
3/4
Echo 1500B (DF) 27.4ms
no
Type 1 dest-unreach
-
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | * | - | - | - | |
| 2 | * | - | - | - | |
| 3 | * | - | - | - | |
| 4 | zayoeurope-AS8218.mix-it.net 2001:7f8:b:100:1d1:a5d0:8218:208 | 8.7ms | 0% | - | NA |
| 5 | 2001:1b48:2:c::1:1 | 8.7ms | 0% | AS8218 | NEO-ASN - Zayo Infrastructure France SA, FR |
| 6 | 2001:1b48:2:2::9:1 | 20.1ms | 0% | AS8218 | NEO-ASN - Zayo Infrastructure France SA, FR |
| 7 | 2001:1b48:2:7::1:1 | 20.7ms | 0% | AS8218 | NEO-ASN - Zayo Infrastructure France SA, FR |
| 8 | r11-as8218.core.lnz.net.lagis.at 2001:1b48:200:2::2 | 27.7ms | 0% | AS8218 | NEO-ASN - Zayo Infrastructure France SA, FR |
| 9 | * | - | 0% | - | |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - |
tracepath -6
1?: [LOCALHOST] 0.011ms pmtu 1500
1: karsolink-01.net.karsolink.com 0.924ms
2: 2a12:d8c0:109f:121::a1 0.657ms
3: 2a12:d8c0:101f:103::1 8.832ms
4: zayoeurope-AS8218.mix-it.net 9.217ms
5: 2001:1b48:2:c::1:1 9.127ms
6: 2001:1b48:2:2::9:1 19.957ms
7: 2001:1b48:2:7::1:1 25.029ms
8: r11-as8218.core.lnz.net.lagis.at 28.152ms asymm 11
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
4/4
Echo small (56B) 18.4ms
4/4
Echo 1500B (DF) 18.5ms
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 | 0.4ms | 0%* | AS8038 | 6CONNECT - 6connect, Inc., US |
| 2 | * | - | - | - | |
| 3 | * | - | - | - | |
| 4 | 2a00:ee0:1:15::2 | 1.1ms | 0% | AS5603 | SIOL-NET - Telekom Slovenije, d.d., SI |
| 5 | decix.tcr1.itx5.fra.as8218.eu 2001:7f8::201a:0:2 | 15.8ms | 0% | - | NA |
| 6 | 2001:1b48:2:2::6:2 | 15.2ms | 0% | AS8218 | NEO-ASN - Zayo Infrastructure France SA, FR |
| 7 | r11-as8218.core.lnz.net.lagis.at 2001:1b48:200:2::2 | 19.7ms | 0% | AS8218 | NEO-ASN - Zayo Infrastructure France SA, FR |
| 8 | * | - | 0% | - | |
| 9 | * | - | - | - | |
| 10 | * | - | - | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - |
tracepath -6
1?: [LOCALHOST] 0.021ms pmtu 9000
1: fw1-lju.6connect.com 0.748ms
1: fw1-lju.6connect.com 0.668ms
2: no reply
3: no reply
4: 2a00:ee0:1:10::2 1.619ms asymm 3
5: 2a00:ee0:1:10::2 1.792ms pmtu 1500
5: decix.tcr1.itx5.fra.as8218.eu 15.503ms
6: 2001:1b48:2:2::6:2 15.509ms asymm 4
7: r11-as8218.core.lnz.net.lagis.at 19.560ms asymm 5
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
4/4
Echo small (56B) 13.3ms
3/4
Echo 1500B (DF) 13.4ms
no
Type 1 dest-unreach
-
TCP responds on
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | 2a01:261:313:b814::1 | 0.4ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 2 | 2a01:260:1::225 | 9.4ms | 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 | 2.2ms | 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 | 2.0ms | 0%* | AS34779 | T-2-AS - T-2, d.o.o., SI |
| 5 | 100ge0-0-0-31.core1.vie1.he.net 2001:470:0:4a8::1 | 9.8ms | - | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 6 | vix-ip6-et-0-1-2-0-r60.inx.vie.at.nextlayer.net @VIX / AAIX / SAIX / TIROL-IX / ERA-IX 2001:7f8:30:0:2:1:0:1764 | 9.4ms | 40% | - | NA |
| 7 | vix-ip6-et-0-1-2-0-r60.inx.vie.at.nextlayer.net @VIX / AAIX / SAIX / TIROL-IX / ERA-IX 2001:7f8:30:0:2:1:0:1764 | 9.3ms | 0% | - | NA |
| 8 | ip6-ae1-0-r32.inx.vie.nextlayer.net 2a01:190:1764:800c::1 | 9.2ms | 0% | AS1764 | NEXTLAYER-AS - Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH, AT |
| 9 | r10-as1764.core.lnz.net.lagis.at 2a01:190:1703:2d::2 | 12.8ms | 0% | AS1764 | NEXTLAYER-AS - Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH, AT |
| 10 | * | - | 0% | - | |
| 11 | * | - | - | - | |
| 12 | * | - | - | - | |
| 13 | * | - | - | - | |
| 14 | * | - | - | - | |
| 15 | * | - | - | - | |
| 16 | * | - | - | - |
Rate-limited ICMPv6: hop 6 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.027ms pmtu 1500
1: 2a01:261:313:b814::1 0.781ms
2: 2a01:260:1::225 2.500ms
3: 2a01-260-1-1--9c.core6.t-2.net 2.993ms
4: 2a01-260-1-1--38.core6.t-2.net 2.305ms asymm 3
5: 100ge0-0-0-31.core1.vie1.he.net 12.596ms
6: vix-ip6-et-0-1-2-0-r60.esh.vie.at.nextlayer.net 33.365ms asymm 5
7: vix-ip6-et-0-1-2-0-r60.inx.vie.at.nextlayer.net 10.504ms asymm 5
8: r10-as1764.core.lnz.net.lagis.at 12.891ms asymm 6
9: r10-as1764.core.lnz.net.lagis.at 12.929ms asymm 6
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