AS overview
Test target: 2a10:a840::1 · (no live host found) · address space: PA · prefixes announced: 1
prefix(es): 2a10:a840::/29
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 NL host (go6lab), SLO host (6connect) - reached via an MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO-resident transit operator.
RPKI & ASPA
1 of 1 prefix(es) covered by a valid ROA.
| Prefix | RPKI state | Reason | Covering VRP(s) |
|---|---|---|---|
2a10:a840::/29 | ✓ valid | matched VRP (correct origin, length within maxLength) | AS211669 /29 maxLen 29 (ripe) |
Random-IP probe (yarrp) into the AS' prefixes
At least one router inside AS211669's announced prefix replied during the random-target probe. Hop(s): 2a10:a840::. These are candidate targets for direct testing.
ICMPv6 Type 2 (Packet Too Big) acceptance - active test
Type 2 active test inconclusive: no Echo Reply to 1300-byte probe.
method: ICMPv6 Echo + forged PTB, tested 2026-05-25T12:37:56Z
Failure detail — what to grep in your logs
| vantage | our source | your target | method | result | tested (UTC) |
|---|---|---|---|---|---|
| go6lab | 2a00:8642:42::75 | 2a10:a840::1 | icmp6-echo | no_echo | 2026-05-25T12:37:56Z |
| karsolink | 2a12:d8c0:105a:9001::a154 | 2a10:a840::1 | icmp6-echo | no_echo | 2026-05-25T12:49:41Z |
| odin | 2607:fae0:a000::42 | 2a10:a840::1 | icmp6-echo | no_echo | 2026-05-25T12:37:26Z |
Attempt log (go6lab):
icmp6-echo→ no_echo: no Echo Reply to 1300-byte probedns-tcp→ no_tcp: connect failed: [Errno 113] No route to hosttls→ no_tcp: TLS connect failedhttp→ no_tcp: tcp/80 not open
Attempt log (karsolink):
icmp6-echo→ no_echo: no Echo Reply to 1300-byte probedns-tcp→ no_tcp: connect failed: [Errno 113] No route to hosttls→ no_tcp: TLS connect failedhttp→ no_tcp: tcp/80 not open
Attempt log (odin):
icmp6-echo→ no_echo: no Echo Reply to 1300-byte probedns-tcp→ no_tcp: connect failed: [Errno 113] No route to hosttls→ 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 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 one of our two source IPs, the drop is path-asymmetric — one transit on the asymmetric route is filtering, the other is not.
From NL host (go6lab) transit only unreachable
filter likely at: no path · min PMTU on path: 1500
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | 2a00:8642:42::3 | 0.9ms | 0% | AS203993 | STEFFANN-DC-AS - S.J.M. Steffann, NL |
| 2 | gw.friends.steffann.nl 2a00:8642:1000:f000::1 | 2.4ms | 0%* | AS203993 | STEFFANN-DC-AS - S.J.M. Steffann, NL |
| 3 | 2a00:1ca8:1::194 | 4.0ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 4 | 2a03:3f40::10:41 | 9.4ms | 0% | AS50673 | Serverius-as - Serverius Holding B.V., NL |
| 5 | 2001:b28:3ff::1b1b:0:1 | 28.9ms | 0% | AS31500 | GNM-AS - Global Network Management Inc, AG |
| 6 | * | - | - | - | |
| 7 | * | - | - | - | |
| 8 | * | - | - | - | |
| 9 | altitud-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:a5d5:7111:13 | 36.5ms | 0% | - | NA |
| 10 | 2a0a:9440:57:111:0:211:669:2 | 50.5ms | 0% | AS57111 | ALTITUD - NOVA NETWORKS S.R.L., IT |
| 11 | 2a10:a840 | 55.4ms | 0% | - | |
| 12 | 2a10:a840 | 49.6ms | 0% | - | |
| 13 | 2a10:a840 | 49.9ms | 0% | - | |
| 14 | 2a10:a840 | 50.5ms | 0% | - | |
| 15 | 2a10:a840 | 50.3ms | 0% | - | |
| 16 | 2a10:a840 | 50.2ms | 0% | - | |
| 17 | 2a10:a840 | 50.2ms | 0% | - | |
| 18 | 2a10:a840 | 50.0ms | 0% | - | |
| 19 | 2a10:a840 | 50.3ms | 0% | - | |
| 20 | 2a10:a840 | 50.0ms | 0% | - | |
| 21 | 2a10:a840 | 50.4ms | 0% | - | |
| 22 | 2a10:a840 | 50.9ms | 0% | - | |
| 23 | 2a10:a840 | 51.0ms | 0% | - | |
| 24 | 2a10:a840 | 50.4ms | 0% | - |
tracepath -6
1?: [LOCALHOST] 0.548ms pmtu 1500
1: 2a00:8642:42::3 1.780ms
1: 2a00:8642:42::3 1.991ms
2: gw.friends.steffann.nl 3.534ms
3: 2a00:1ca8:1::194 3.089ms
4: 2a03:3f40::10:41 2.825ms
5: 2001:b28:3ff::1b1b:0:1 26.810ms asymm 6
6: no reply
7: no reply
8: no reply
9: altitud.minap.it 37.146ms
10: 2a0a:9440:57:111:0:211:669:2 50.508ms
11: 2a10:a840:: 50.675ms asymm 10
12: 2a10:a840:: 50.738ms asymm 10
13: 2a10:a840:: 50.318ms asymm 10
14: 2a10:a840:: 50.827ms asymm 10
15: 2a10:a840:: 50.136ms asymm 10
16: 2a10:a840:: 50.669ms asymm 10
17: 2a10:a840:: 49.720ms asymm 10
18: 2a10:a840:: 50.090ms asymm 10
19: 2a10:a840:: 50.217ms asymm 10
20: 2a10:a840:: 50.445ms asymm 10
21: 2a10:a840:: 50.548ms asymm 10
22: 2a10:a840:: 50.285ms asymm 10
23: 2a10:a840:: 50.636ms asymm 10
24: 2a10:a840:: 50.526ms asymm 10
Too many hops: pmtu 1500
Resume: pmtu 1500 From ITA host (Karsolink) transit only unreachable
filter likely at: no path · min PMTU on path: 1500
Path (traceroute + mtr + PTR)
| # | IP / PTR | RTT | mtr loss | AS | AS holder |
|---|---|---|---|---|---|
| 1 | * | - | 0%* | - | |
| 2 | * | - | - | - | |
| 3 | 2a12:d8c0:101f:6::1 | 10.1ms | 20% | AS204471 | KARSOLINK - 2S Computers SRL, IT |
| 4 | altitud.minap.it 2001:7f8:c5::a505:7111:1 | 10.1ms | 0% | AS57111 | Altitud s.r.l. |
| 5 | 2a0a:9440:57:111:0:211:669:2 | 23.4ms | 0% | AS57111 | ALTITUD - NOVA NETWORKS S.R.L., IT |
| 6 | 2a10:a840 | 23.4ms | 0% | - | |
| 7 | 2a10:a840 | 23.2ms | 0% | - | |
| 8 | * | - | 0% | - | |
| 9 | * | - | 0% | - | |
| 10 | * | - | 0% | - | |
| 11 | * | - | 0% | - | |
| 12 | * | - | 10% | - | |
| 13 | 2a10:a840 | 23.7ms | 0% | - | |
| 14 | 2a10:a840 | 23.3ms | 20% | - | |
| 15 | 2a10:a840 | 23.4ms | 40% | - | |
| 16 | 2a10:a840 | 23.3ms | 20% | - | |
| 17 | * | - | 20% | - | |
| 18 | * | - | 30% | - | |
| 19 | * | - | 20% | - | |
| 20 | * | - | 30% | - | |
| 21 | * | - | 30% | - | |
| 22 | * | - | 30% | - | |
| 23 | * | - | 10% | - | |
| 24 | 2a10:a840 | 23.5ms | 20% | - |
Rate-limited ICMPv6: hop 3, hop 12, hop 14, hop 15, hop 16, hop 17, hop 18, hop 19, hop 20, hop 21, hop 22, hop 23, hop 24 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.031ms pmtu 1500
1: no reply
2: 2a12:d8c0:109f:121::a1 0.964ms
3: 2a12:d8c0:101f:6::1 10.366ms
4: altitud.minap.it 10.394ms
5: 2a0a:9440:57:111:0:211:669:2 23.878ms
6: 2a10:a840:: 23.877ms asymm 5
7: 2a10:a840:: 23.940ms asymm 5
8: 2a10:a840:: 23.942ms asymm 5
9: 2a10:a840:: 23.821ms asymm 5
10: 2a10:a840:: 23.972ms asymm 5
11: 2a10:a840:: 23.893ms asymm 5
12: 2a10:a840:: 23.826ms asymm 5
13: 2a10:a840:: 23.844ms asymm 5
14: 2a10:a840:: 23.710ms asymm 5
15: 2a10:a840:: 23.974ms asymm 5
16: 2a10:a840:: 23.932ms asymm 5
17: 2a10:a840:: 23.856ms asymm 5
18: 2a10:a840:: 23.824ms asymm 5
19: 2a10:a840:: 24.005ms asymm 5
20: 2a10:a840:: 24.020ms asymm 5
21: 2a10:a840:: 25.805ms asymm 5
22: 2a10:a840:: 23.846ms asymm 5
23: 2a10:a840:: 23.760ms asymm 5
24: 2a10:a840:: 23.982ms asymm 5
Too many hops: pmtu 1500
Resume: pmtu 1500 From SLO host (6connect) transit only unreachable
filter likely at: no path · 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 | ccr-to-fw-ccr1-gw-lju.6connect.com 2607:fae0:a000:2::2 | 0.5ms | 0%* | AS8038 | 6CONNECT - 6connect, Inc., US |
| 3 | 2a03:a100:0:201:1::1 | 0.9ms | 50% | AS56635 | XENYA - XENYA inzeniring, proizvodnja in trgovina, d.o.o. Ljubljana, SI |
| 4 | e0-1.core1.lju1.he.net 2001:470:1:5be::1 | 2.1ms | 0% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 5 | * | - | - | - | |
| 6 | port-channel1.core1.zag2.he.net 2001:470:0:2ea::2 | 3.9ms | 70% | AS6939 | HURRICANE - Hurricane Electric LLC, US |
| 7 | * | - | - | - | |
| 8 | altitud-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:a5d5:7111:13 | 12.2ms | 0% | - | NA |
| 9 | 2a0a:9440:57:111:0:211:669:2 | 25.3ms | 0% | AS57111 | ALTITUD - NOVA NETWORKS S.R.L., IT |
| 10 | 2a10:a840 | 25.1ms | 0% | - | |
| 11 | 2a10:a840 | 25.5ms | 0% | - | |
| 12 | 2a10:a840 | 25.4ms | 0% | - | |
| 13 | 2a10:a840 | 25.4ms | 0% | - | |
| 14 | 2a10:a840 | 25.4ms | 0% | - | |
| 15 | 2a10:a840 | 25.5ms | 0% | - | |
| 16 | 2a10:a840 | 25.4ms | 0% | - | |
| 17 | 2a10:a840 | 25.6ms | 0% | - | |
| 18 | 2a10:a840 | 25.6ms | 0% | - | |
| 19 | 2a10:a840 | 25.4ms | 0% | - | |
| 20 | 2a10:a840 | 25.2ms | 0% | - | |
| 21 | 2a10:a840 | 25.4ms | 0% | - | |
| 22 | 2a10:a840 | 25.4ms | 0% | - | |
| 23 | 2a10:a840 | 25.5ms | 0% | - | |
| 24 | 2a10:a840 | 25.3ms | 0% | - |
Rate-limited ICMPv6: hop 3, hop 6 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).
tracepath -6
1?: [LOCALHOST] 0.021ms pmtu 1500
1: fw1-lju.6connect.com 0.482ms
1: fw1-lju.6connect.com 0.551ms
2: no reply
3: no reply
4: e0-1.core1.lju1.he.net 1.769ms
5: no reply
6: port-channel1.core1.zag2.he.net 4.270ms
7: no reply
8: altitud-v6.mix-it.net 12.159ms
9: 2a0a:9440:57:111:0:211:669:2 25.490ms
10: 2a10:a840:: 25.699ms asymm 9
11: 2a10:a840:: 25.741ms asymm 9
12: 2a10:a840:: 25.503ms asymm 9
13: 2a10:a840:: 25.392ms asymm 9
14: 2a10:a840:: 25.473ms asymm 9
15: 2a10:a840:: 25.550ms asymm 9
16: 2a10:a840:: 25.504ms asymm 9
17: 2a10:a840:: 25.555ms asymm 9
18: 2a10:a840:: 25.529ms asymm 9
19: 2a10:a840:: 25.494ms asymm 9
20: 2a10:a840:: 25.574ms asymm 9
21: 2a10:a840:: 25.700ms asymm 9
22: 2a10:a840:: 25.956ms asymm 9
23: 2a10:a840:: 25.520ms asymm 9
24: 2a10:a840:: 25.538ms asymm 9
Too many hops: pmtu 1500
Resume: pmtu 1500