AS overview
Test target: 2a0e:b107:12d3::1 · static prefix probe · address space: unknown · prefixes announced: 10
prefix(es): 2a0e:b107:12d3::/48, 2a06:a005:753::/48, 2a14:c380:271::/48, 2a05:b0c6:5006::/48, 2a05:b0c6:5001::/48, 2a06:a005:75a::/48, 2a0e:b107:12d1::/48, 2a0e:b107:12d2::/48 (+2 more)
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 | ||
2a0e:b107:12d3::1 | prb | ✓ | ✗ | refused | refused | ✓ | ✓ | ✗ | refused | refused | ✓ | ✓ | ✗ | refused | refused | ✓ | ✓ | ✗ | ? | ? | ✓ | ✓ | ✗ | refused | refused | ✓ | ✓ | ✗ | refused | refused | ✓ | ✓ | ✗ | refused | refused | ✓ |
MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO peering
Not an MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO member, but our traceroute path crosses the MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO LAN from ITA host (Karsolink) - reached via an MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO-resident transit operator.
RPKI & ASPA
9 of 10 prefix(es) covered by a valid ROA, 1 invalid.
| Prefix | RPKI state | Reason | Covering VRP(s) |
|---|---|---|---|
2a0e:b107:12d3::/48 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS211358 /48 maxLen 48 (ripe) |
2a06:a005:753::/48 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS211358 /44 maxLen 48 (ripe) |
2a14:c380:271::/48 | ✗ invalid | maxLength too short for the announced prefix | AS211358 /44 maxLen 44 (ripe) |
2a05:b0c6:5006::/48 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS211358 /48 maxLen 48 (ripe) |
2a05:b0c6:5001::/48 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS211358 /48 maxLen 48 (ripe) |
2a06:a005:75a::/48 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS211358 /44 maxLen 48 (ripe) |
2a0e:b107:12d1::/48 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS211358 /48 maxLen 48 (ripe) |
2a0e:b107:12d2::/48 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS211358 /48 maxLen 48 (ripe) |
2a05:b0c6:500f::/48 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS211358 /48 maxLen 48 (ripe) |
2a06:a005:756::/48 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS211358 /44 maxLen 48 (ripe) |
ASPA: this AS has published an ASPA record listing 22 upstream provider(s) that are authorized to propagate routes from it: AS6204, AS6517, AS6939, AS8772, AS11967, AS16276, AS24482, AS29632, AS33387, AS34927, AS41051, AS52025, AS152565, AS200132, AS207841, AS209533, AS209735, AS211288, AS212895, AS215638, AS215828, AS216324. Routes from this AS that arrive via any other upstream are considered ASPA-invalid by validators that enforce ASPA.
Random-IP probe (yarrp) into the AS' prefixes
At least one router inside AS211358's announced prefix replied during the random-target probe. Hop(s): 2a06:a005:753::1, 2a06:a005:753:ffff:8248::2, 2a0e:b107:12d3::1. These are candidate targets for direct testing.
ICMPv6 Type 2 (Packet Too Big) acceptance - active test
Type 2 not honored. Forged ICMPv6 PTB (MTU=1280) had no effect: the next 1500-byte Echo Reply still arrived whole (1360 B, no Fragment Header). PMTUD does not work toward this address from us.
method: ICMPv6 Echo + forged PTB, tested 2026-09-23T12:07:51Z
Failure detail - what to grep in your logs
| vantage | our source | your target | method | result | tested (UTC) |
|---|---|---|---|---|---|
| belgrade | 2a09:ab81::91 | 2a0e:b107:12d3::1 | icmp6-echo | not_honored | 2026-09-23T12:07:51Z |
| berlin | 2a06:d1c1:10b::cccc | 2a0e:b107:12d3::1 | icmp6-echo | not_honored | 2026-09-23T12:07:48Z |
| duseldorf | 2a06:d1c1:10d::aaaa | 2a0e:b107:12d3::1 | icmp6-echo | not_honored | 2026-09-23T12:07:47Z |
| go6lab | 2a00:8642:42::75 | 2a0e:b107:12d3::1 | icmp6-echo | not_honored | 2026-09-23T12:09:29Z |
| karsolink | 2a12:d8c0:105a:9001::a154 | 2a0e:b107:12d3::1 | icmp6-echo | not_honored | 2026-09-23T12:07:48Z |
| odin | 2607:fae0:a000::42 | 2a0e:b107:12d3::1 | icmp6-echo | not_honored | 2026-09-23T12:07:47Z |
| t2 | 2a01:261:313:b814:2a0:98ff:fe5b:13e4 | 2a0e:b107:12d3::1 | icmp6-echo | not_honored | 2026-09-23T12:07:49Z |
Attempt log (belgrade):
icmp6-echo→ not_honored (reply shrank 1360→1360 B)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→ not_honored (reply shrank 1360→1360 B)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→ not_honored (reply shrank 1360→1360 B)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→ not_honored (reply shrank 1360→1360 B)dns-tcp→ no_tcp: connect failed: timed outtls→ no_tcp: TLS connect failedhttp→ no_tcp: tcp/80 not open
Attempt log (karsolink):
icmp6-echo→ not_honored (reply shrank 1360→1360 B)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→ not_honored (reply shrank 1360→1360 B)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→ not_honored (reply shrank 1360→1360 B)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.
What does "Type 2 not honored" actually mean? - click to expand
What this test does
Using the icmp6-echo method, we send a 1500-byte ICMPv6 Echo Request, then a forged ICMPv6 Type 2 (Packet Too Big) declaring path MTU=1280, and observe whether the next Echo Reply arrives split into IPv6 fragments. RFC 4890 requires hosts and intermediate networks not to filter ICMPv6 Type 2; the destination's TCP/UDP stack must act on a received PTB by lowering its Path MTU cache for that destination, which makes subsequent segments smaller.
What we measured
The TCP segment size your server emitted before our forged Type 2 was 1360 B; after, it was 1360 B. No change. RFC 4890 ("Type 2 messages MUST NOT be filtered") expects subsequent segments to shrink to fit a Path MTU of 1280 B.
Three plausible causes
- Your host firewall is dropping ICMPv6 Type 2 inbound. Many default firewall rule sets only allow Echo Request/Reply and Neighbor Discovery, silently dropping all other ICMPv6 types - including Packet Too Big.
- An upstream / transit network is dropping ICMPv6 Type 2 before it reaches you. Some transit ASes filter ICMPv6 messages other than Echo at the edge. The forged PTB never arrives, so your stack never has a chance to act on it.
- Your kernel is ignoring the PTB. Linux / BSD stacks normally accept ICMPv6 PTB and update the route cache, but a few sysctls (or a hardened kernel) can be configured to ignore PMTU updates - typically as part of an over-aggressive anti-spoofing or uRPF policy.
How to check & fix (Linux examples)
1. Confirm Type 2 is not blocked at the host firewall:
sudo ip6tables -L INPUT -nv | grep -iE 'icmpv6|packet-too-big' sudo nft list ruleset 2>/dev/null | grep -A1 'icmpv6'
If you see rules dropping ICMPv6 unconditionally, change them to permit at least icmpv6 type packet-too-big (and destination-unreachable, time-exceeded, parameter-problem per RFC 4890).
2. Confirm the kernel accepts incoming PTB:
sudo sysctl net.ipv6.conf.all.accept_redirects net.ipv4.ip_no_pmtu_disc net.ipv6.route.mtu_expires
The defaults (accept_redirects=1, ip_no_pmtu_disc=0) are the right values for honoring PTB.
3. Live trace: while we have an open TCP flow with a small MSS (we run our test from 2607:fae0:a000::42 on odin, 2a00:8642:42::75 on go6lab, 2a12:d8c0:105a:9001::a154 on karsolink, 2a09:ab81::91 on belgrade, 2a01:261:313:b814:2a0:98ff:fe5b:13e4 on t2, 2a06:d1c1:10a::bbbb on amsterdam, 2a06:d1c1:10d::aaaa on duseldorf and 2a06:d1c1:10b::cccc on berlin), watch for our forged Type 2 arriving on your interface:
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 2a12:d8c0:105a:9001::a154 or src host 2a09:ab81::91 or src host 2a01:261:313:b814:2a0:98ff:fe5b:13e4 or src host 2a06:d1c1:10a::bbbb or src host 2a06:d1c1:10d::aaaa or src host 2a06:d1c1:10b::cccc)'
If you see our PTBs arriving but TCP segments still stay big, the drop is in your kernel or NIC offload (cause 3). If you don't see them at all, the drop is upstream of you (cause 2) - ask your upstream(s) to permit ICMPv6 Type 2.
4. If your test target above (2026-09-23T12:07:51Z) is a host that you don't own (e.g. a third-party DNS / TLS server you happen to operate prefixes for), the verdict reflects that specific host's behaviour - try the test against a server you do own and we'll happily re-run.
RFC 4890 references: §4.3.1 (Packet Too Big - MUST NOT be dropped), and RFC 8201 for the broader PMTUD requirement.
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: destination AS211358 (AS-IPV6GO) · min PMTU on path: 1476
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 | 0.4ms | 0% | AS13004 | SOX - Serbian Open Exchange DOO, RS |
| 3 | 2001:7f8:1e:8::3d | 0.3ms | 0% | AS13004 | SOX - Serbian Open Exchange DOO, RS |
| 4 | 2001:67c:128c::699 | 17.6ms | 0% | - | NA |
| 5 | 2001:67c:128c::39e | 19.2ms | 0% | - | NA |
| 6 | * | - | - | - | |
| 7 | * | - | - | - | |
| 8 | 2a12:3200:f000::222 | 36.7ms | 0% | AS6204 | ZET-NET - INTERKVM HOST SRL, RO |
| 9 | RS.AS211358.uk.LoNAP.10GbE.ppnetworks.it 2a06:a005:753::1 | 33.6ms | 0% | AS211358 | AS-IPV6GO - Patrizio Palumbo, IT |
| 10 | router.eu.10GbE.ppnetworks.it 2a0e:b107:12d3::1 | 42.8ms | 0% | AS211358 | AS-IPV6GO - Patrizio Palumbo, IT |
tracepath -6
1?: [LOCALHOST] 0.011ms pmtu 1500
1: _gateway 36.508ms
1: _gateway 0.455ms
2: sox-pn.sox.rs 10.209ms
3: 2001:7f8:1e:8::3d 1.028ms asymm 2
4: 2001:67c:128c::699 19.771ms
5: 2001:67c:128c::39e 19.169ms asymm 3
6: no reply
7: no reply
8: 2a12:3200:f000::222 36.799ms asymm 5
9: RS.AS211358.uk.LoNAP.10GbE.ppnetworks.it 34.898ms
10: RS.AS211358.uk.LoNAP.10GbE.ppnetworks.it 36.575ms pmtu 1476
10: router.eu.10GbE.ppnetworks.it 43.097ms reached
Resume: pmtu 1476 hops 10 back 10 From DE host (Berlin) echo onlyRFC 4890 ✗
filter likely at: destination AS211358 (AS-IPV6GO) · min PMTU on path: 1476
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 | ae0-150.cr10.fra01.lwlcom.net 2a00:c380:b200:230::174 | 20.9ms | 0% | AS50629 | LWLCOM - LWLcom GmbH, DE |
| 4 | ae0-100.cr10.fra02.lwlcom.net 2a00:c380:b200:230::215 | 20.8ms | 0% | AS50629 | LWLCOM - LWLcom GmbH, DE |
| 5 | ae0-10.cr10.fra06.lwlcom.net 2a00:c380:b200:230::236 | 20.6ms | 0% | AS50629 | LWLCOM - LWLcom GmbH, DE |
| 6 | * | - | - | - | |
| 7 | * | - | - | - | |
| 8 | * | - | - | - | |
| 9 | 2a12:3200:f000::222 | 67.7ms | 0% | AS6204 | ZET-NET - INTERKVM HOST SRL, RO |
| 10 | RS.AS211358.uk.LoNAP.10GbE.ppnetworks.it 2a06:a005:753::1 | 67.6ms | 0% | AS211358 | AS-IPV6GO - Patrizio Palumbo, IT |
| 11 | router.eu.10GbE.ppnetworks.it 2a0e:b107:12d3::1 | 55.4ms | 0% | AS211358 | AS-IPV6GO - Patrizio Palumbo, IT |
tracepath -6
1?: [LOCALHOST] 0.021ms pmtu 1500
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.518ms
1: xe-0-0-13-178.gw01.ber01.as59645.net 0.532ms
2: ae0-2453.cr10.ber01.lwlcom.net 1.298ms
3: ae0-150.cr10.fra01.lwlcom.net 10.405ms asymm 7
4: ae0-100.cr10.fra02.lwlcom.net 10.694ms asymm 8
5: ae0-10.cr10.fra06.lwlcom.net 10.536ms asymm 7
6: no reply
7: no reply
8: no reply
9: 2a12:3200:f000::222 21.731ms asymm 5
10: RS.AS211358.uk.LoNAP.10GbE.ppnetworks.it 21.838ms asymm 5
11: RS.AS211358.uk.LoNAP.10GbE.ppnetworks.it 21.731ms pmtu 1476
11: router.eu.10GbE.ppnetworks.it 31.123ms reached
Resume: pmtu 1476 hops 11 back 6 From DE host (Düsseldorf) echo onlyRFC 4890 ✗
filter likely at: destination AS211358 (AS-IPV6GO) · min PMTU on path: 1476
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 | ipv6.decix-dusseldorf.core1.dus1.he.net 2001:7f8:9e::1b1b:0:1 | 7.0ms | 0% | - | NA |
| 3 | * | - | - | - | |
| 4 | be47.core3.ams1.he.net 2001:470:e:12::2 | 10.2ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 5 | be3.core4.lon2.he.net 2001:470:e:49::2 | 14.9ms | 10% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 6 | be4.core2.lon3.he.net 2001:470:e:41::2 | 14.9ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 7 | * | - | - | - | |
| 8 | RS.AS211358.uk.LoNAP.10GbE.ppnetworks.it 2a06:a005:753::1 | 12.4ms | 0% | AS211358 | AS-IPV6GO - Patrizio Palumbo, IT |
| 9 | router.eu.10GbE.ppnetworks.it 2a0e:b107:12d3::1 | 20.5ms | 0% | AS211358 | AS-IPV6GO - Patrizio Palumbo, IT |
Rate-limited ICMPv6: hop 5 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.016ms pmtu 1500
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.316ms
1: xe-0-0-12-142.gw01.dus01.as59645.net 0.252ms
2: ipv6.decix-dusseldorf.core1.dus1.he.net 6.560ms asymm 3
3: no reply
4: be47.core3.ams1.he.net 8.596ms
5: no reply
6: be4.core2.lon3.he.net 14.891ms
7: no reply
8: RS.AS211358.uk.LoNAP.10GbE.ppnetworks.it 12.541ms asymm 4
9: RS.AS211358.uk.LoNAP.10GbE.ppnetworks.it 12.745ms pmtu 1476
9: router.eu.10GbE.ppnetworks.it 21.473ms reached
Resume: pmtu 1476 hops 9 back 5 From NL host (go6lab) echo onlyRFC 4890 ✗
filter likely at: destination AS211358 (AS-IPV6GO) · min PMTU on path: 1476
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | 2a00:8642:42::2 | 3.4ms | 0% | AS203993 | GNA-DC1-AS - S.J.M. Steffann, NL |
| 2 | gw.friends.steffann.nl 2a00:8642:1000:f000::1 | 25.8ms | 0%* | AS203993 | GNA-DC1-AS - S.J.M. Steffann, NL |
| 3 | 2a00:1ca8:1::194 | 26.6ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 4 | 2a03:3f40::10:33 | 9.7ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 5 | et-0-0-3.lon2-m140-bdr2.as215638.net 2001:7f8:1:0:a500:21:5638:1 | 13.5ms | 0% | - | NA |
| 6 | * | - | - | - | |
| 7 | RS.AS211358.uk.LoNAP.10GbE.ppnetworks.it 2a06:a005:753::1 | 14.2ms | 0% | AS211358 | AS-IPV6GO - Patrizio Palumbo, IT |
| 8 | RS.AS211358.uk.LoNAP.10GbE.ppnetworks.it 2a06:a005:753::1 | 11.4ms | 0% | AS211358 | AS-IPV6GO - Patrizio Palumbo, IT |
| 9 | router.eu.10GbE.ppnetworks.it 2a0e:b107:12d3::1 | 20.7ms | 0% | AS211358 | AS-IPV6GO - Patrizio Palumbo, IT |
tracepath -6
1?: [LOCALHOST] 0.026ms pmtu 1476
1: 2a00:8642:42::2 2.823ms
1: 2a00:8642:42::2 3.518ms
2: no reply
3: 2a00:1ca8:1::194 11.627ms
4: 2a03:3f40::10:33 11.999ms
5: et-0-0-3.lon2-m140-bdr2.as215638.net 21.283ms
6: no reply
7: RS.AS211358.uk.LoNAP.10GbE.ppnetworks.it 12.074ms
8: RS.AS211358.uk.LoNAP.10GbE.ppnetworks.it 12.191ms asymm 7
9: router.eu.10GbE.ppnetworks.it 21.256ms reached
Resume: pmtu 1476 hops 9 back 8 From ITA host (Karsolink) echo onlyRFC 4890 ✗
filter likely at: destination AS211358 (AS-IPV6GO) · min PMTU on path: 1476
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | * | - | 0%* | - | |
| 2 | 2a12:d8c0:109f:121::a1 | 0.4ms | - | AS204471 | KARSOLINK - 2S Computers SRL, IT |
| 3 | * | - | 60% | - | |
| 4 | interkvm-AS6204.mix-it.net @MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO 2001:7f8:b:100:1d1:a5d0:6204:192 | 8.8ms | 0% | - | NA |
| 5 | * | - | - | - | |
| 6 | * | - | - | - | |
| 7 | 2a12:3200:f000::222 | 28.0ms | 0% | AS6204 | ZET-NET - INTERKVM HOST SRL, RO |
| 8 | RS.AS211358.uk.LoNAP.10GbE.ppnetworks.it 2a06:a005:753::1 | 28.0ms | 0% | AS211358 | AS-IPV6GO - Patrizio Palumbo, IT |
| 9 | router.eu.10GbE.ppnetworks.it 2a0e:b107:12d3::1 | 36.9ms | 0% | AS211358 | AS-IPV6GO - Patrizio Palumbo, IT |
Rate-limited ICMPv6: hop 3 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.030ms pmtu 1500
1: karsolink-01.net.karsolink.com 0.645ms
1: karsolink-01.net.karsolink.com 0.861ms
2: 2a12:d8c0:109f:121::a1 0.803ms
3: no reply
4: interkvm-as6204.mix-it.net 9.343ms
5: no reply
6: no reply
7: 2a12:3200:f000::222 28.486ms
8: rs.as211358.uk.lonap.10gbe.ppnetworks.it 28.475ms asymm 11
9: rs.as211358.uk.lonap.10gbe.ppnetworks.it 29.357ms pmtu 1476
9: router.eu.10gbe.ppnetworks.it 37.205ms reached
Resume: pmtu 1476 hops 9 back 12 From SLO host (6connect) echo onlyRFC 4890 ✗
filter likely at: destination AS211358 (AS-IPV6GO) · min PMTU on path: 1476
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 | 2a03:a100:0:201:1::1 | 1.0ms | 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 | 2.2ms | 10% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 5 | 100ge0-0-0-5.core1.vie1.he.net 2001:470:0:578::1 | 8.8ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 6 | be3.core1.prg1.he.net 2001:470:e:a7::1 | 11.6ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 7 | be8.core4.fra1.he.net 2001:470:e:1e::1 | 19.9ms | 30% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 8 | be2.core3.ams1.he.net 2001:470:e:38::1 | 25.2ms | 10% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 9 | be3.core4.lon2.he.net 2001:470:e:49::2 | 28.5ms | 40% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 10 | be4.core2.lon3.he.net 2001:470:e:41::2 | 28.7ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 11 | * | - | - | - | |
| 12 | RS.AS211358.uk.LoNAP.10GbE.ppnetworks.it 2a06:a005:753::1 | 26.7ms | 0% | AS211358 | AS-IPV6GO - Patrizio Palumbo, IT |
| 13 | router.eu.10GbE.ppnetworks.it 2a0e:b107:12d3::1 | 35.9ms | 0% | AS211358 | AS-IPV6GO - Patrizio Palumbo, IT |
Rate-limited ICMPv6: hop 4, hop 7, hop 8, hop 9 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.017ms pmtu 9000
1: fw1-lju.6connect.com 0.709ms
1: fw1-lju.6connect.com 0.555ms
2: no reply
3: 2a03:a100:0:201:1::1 0.952ms
4: 2a03:a100:0:201:1::1 0.771ms pmtu 1500
4: e0-1.core1.lju1.he.net 2.120ms
5: 100ge0-0-0-5.core1.vie1.he.net 9.836ms
6: be3.core1.prg1.he.net 12.245ms
7: be8.core4.fra1.he.net 18.325ms
8: be2.core3.ams1.he.net 23.034ms
9: be3.core4.lon2.he.net 29.465ms
10: be4.core2.lon3.he.net 29.489ms asymm 8
11: no reply
12: RS.AS211358.uk.LoNAP.10GbE.ppnetworks.it 27.449ms asymm 9
13: RS.AS211358.uk.LoNAP.10GbE.ppnetworks.it 28.516ms pmtu 1476
13: router.eu.10GbE.ppnetworks.it 35.608ms reached
Resume: pmtu 1476 hops 13 back 10 From SLO host (T-2) echo onlyRFC 4890 ✗
filter likely at: destination AS211358 (AS-IPV6GO) · min PMTU on path: 1476
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 | 9.3ms | 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 | 3.3ms | 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 | 2.7ms | 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 | 14.3ms | - | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 6 | 100ge0-0-0-31.core1.vie1.he.net 2001:470:0:4a8::1 | 13.8ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 7 | be8.core4.fra1.he.net 2001:470:e:1e::1 | 36.3ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 8 | be8.core4.fra1.he.net 2001:470:e:1e::1 | 36.2ms | 20% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 9 | be3.core4.lon2.he.net 2001:470:e:49::2 | 36.0ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 10 | be3.core4.lon2.he.net 2001:470:e:49::2 | 38.0ms | 30% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 11 | be4.core2.lon3.he.net 2001:470:e:41::2 | 33.7ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 12 | RS.AS211358.uk.LoNAP.10GbE.ppnetworks.it 2a06:a005:753::1 | 33.2ms | - | AS211358 | AS-IPV6GO - Patrizio Palumbo, IT |
| 13 | router.eu.10GbE.ppnetworks.it 2a0e:b107:12d3::1 | 40.4ms | 0% | AS211358 | AS-IPV6GO - Patrizio Palumbo, IT |
Rate-limited ICMPv6: hop 8, hop 10 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.027ms pmtu 1500
1: no reply
2: 2a01:260:1::225 7.011ms
3: 2a01-260-1-1--9c.core6.t-2.net 2.868ms
4: 2a01-260-1-1--38.core6.t-2.net 3.089ms asymm 3
5: 100ge0-0-0-31.core1.vie1.he.net 12.557ms
6: be3.core1.prg1.he.net 18.438ms
7: be3.core1.prg1.he.net 17.383ms asymm 6
8: be8.core4.fra1.he.net 35.799ms asymm 7
9: be3.core4.lon2.he.net 37.118ms asymm 6
10: be4.core2.lon3.he.net 34.751ms asymm 5
11: be4.core2.lon3.he.net 35.168ms asymm 5
12: no reply
13: ??? 35.195ms pmtu 1476
13: RS.AS211358.uk.LoNAP.10GbE.ppnetworks.it 34.601ms asymm 6
14: ??? 42.249ms reached
Resume: pmtu 1476 hops 14 back 7