AS12779 - ITGATE IT.GatePI/PARFC 4890 ✓RPKI ✓ 5/5ASPA ✓

AS overview

Test target: 2001:1418:9::a:254 · ns.mil.itgate.net · address space: mixed · prefixes announced: 5

prefix(es): 2a10:e140::/32, 2001:1418::/29, 2a02:c480::/32, 2a0c:79c0:2::/48, 2a0c:79c0:4::/48

MIX-IT / NAMEX / MINAP / TOP-IX / VSIX / EQUINIX-MILAN / BGPX-ROME / NAMEX-BARI / PCIX / DECIX-PALERMO peering

Random-IP probe (yarrp) into the AS' prefixes

At least one router inside AS12779's announced prefix replied during the random-target probe. Hop(s): 2001:1418:1::102, 2001:1418:1::112, 2001:1418:1::1242, 2001:1418:1::1252, 2001:1418:1::1262. These are candidate targets for direct testing.

ICMPv6 Type 2 (Packet Too Big) acceptance - active test

Type 2 honored. Forged ICMPv6 PTB (MTU=1280) was accepted by the destination's stack: the next 1500-byte Echo Reply arrived split into 2 fragments via the IPv6 Fragment Header.
method: ICMPv6 Echo + forged PTB, tested 2026-09-23T11:59:25Z

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)

Rate-limited ICMPv6: hop 4 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.018ms pmtu 1500
 1:  _gateway                                              0.501ms 
 1:  _gateway                                              0.635ms 
 2:  sox-pn.sox.rs                                         0.493ms 
 3:  2001:7f8:1e:8::3d                                     0.578ms asymm  2 
 4:  ae8-930.RT.IRX.VIE.AT.retn.net                       12.925ms asymm  3 
 5:  RT.TC2.AMS.NL.retn.net                               28.965ms 
 6:  ams-ix.ipv6.itgate.net                               30.746ms 
 7:  be11.Jolly-Jumper.MIL3.ipv6.ITgate.net               39.579ms asymm  5 
 8:  2001:1418:1::1382                                    39.452ms asymm  6 
 9:  2001:1418:9:ff::172                                  38.722ms asymm  7 
10:  fcf3:7f71:35b5:fde8:50:56ff:fe56:5402                38.630ms asymm  8 
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 DE host (Berlin)   openRFC 4890 ✓

filter likely at: (none) · min PMTU on path: 1500

Path (traceroute + mtr + PTR)

tracepath -6

 1?: [LOCALHOST]                        0.029ms pmtu 1500
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  0.572ms 
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  0.621ms 
 2:  ae0-2453.cr10.ber01.lwlcom.net                        1.011ms 
 3:  ae0-150.cr10.fra01.lwlcom.net                        10.158ms asymm  7 
 4:  ae0-100.cr10.fra02.lwlcom.net                        10.745ms asymm  8 
 5:  ae0-10.cr10.fra06.lwlcom.net                         10.310ms asymm  7 
 6:  ams-ix.1-ix.net                                      21.482ms asymm  8 
 7:  ams-ix.ipv6.itgate.net                               22.688ms asymm  6 
 8:  be11.Jolly-Jumper.MIL3.ipv6.ITgate.net               25.589ms 
 9:  2001:1418:1::1391                                    25.557ms 
10:  2001:1418:9:ff::171                                  24.660ms 
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 DE host (Düsseldorf)   openRFC 4890 ✓

filter likely at: (none) · min PMTU on path: 1500

Path (traceroute + mtr + PTR)

tracepath -6

 1?: [LOCALHOST]                        0.027ms pmtu 1500
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                  0.448ms 
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                  0.261ms 
 2:  eth1-0-12-h5594.edge5-dus1.bb.wiit.network           25.304ms 
 3:  no reply
 4:  lag11.core3-dus1.bb.wiit.network                      0.618ms 
 5:  lag8.core1-dus-ix.bb.wiit.network                     0.434ms 
 6:  de-cix.FRA.ipv6.itgate.net                            4.414ms 
 7:  be11.Jolly-Jumper.MIL3.ipv6.ITgate.net               12.739ms 
 8:  2001:1418:1::1391                                    12.974ms 
 9:  2001:1418:9:ff::172                                  12.539ms 
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 NL host (go6lab)   openRFC 4890 ✓

filter likely at: (none) · min PMTU on path: 1500

Path (traceroute + mtr + PTR)

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:  2a00:8642:42::2                                       2.189ms 
 1:  2a00:8642:42::2                                       2.401ms 
 2:  no reply
 3:  ccr2-ccr1.dc1.nogalliance.org                         3.976ms asymm  2 
 4:  ams-ix.ipv6.itgate.net                                8.470ms asymm  3 
 5:  be11.Jolly-Jumper.MIL3.ipv6.ITgate.net               22.602ms asymm  4 
 6:  2001:1418:1::1382                                    25.358ms asymm  5 
 7:  2001:1418:9:ff::172                                  19.868ms asymm  6 
 8:  fcf3:7f71:35b5:fde8:50:56ff:fe56:5402                19.589ms 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 

From ITA host (Karsolink)   openRFC 4890 ✓

filter likely at: (none) · min PMTU on path: 1500

Path (traceroute + mtr + PTR)

tracepath -6

 1?: [LOCALHOST]                        0.057ms pmtu 1500
 1:  karsolink-01.net.karsolink.com                        1.370ms 
 1:  no reply
 2:  no reply
 3:  2a12:d8c0:101f:6::1                                  10.052ms 
 4:  itgate.minap.it                                      10.683ms asymm  5 
 5:  be11.jolly-jumper.mil3.ipv6.itgate.net                9.968ms asymm  4 
 6:  2001:1418:1::1382                                    10.384ms asymm  5 
 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
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

Path (traceroute + mtr + PTR)

Rate-limited ICMPv6: hop 3 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.023ms pmtu 9000
 1:  fw1-lju.6connect.com                                  0.586ms 
 1:  fw1-lju.6connect.com                                  0.512ms 
 2:  ccr-to-fw-ccr1-gw-lju.6connect.com                    0.888ms 
 3:  2a00:ee1:800:9::1                                     1.932ms 
 4:  2a00:ee0:1:10::2                                      1.309ms asymm  3 
 5:  2a00:ee0:1:15::2                                      6.700ms pmtu 1500
 5:  de-cix.FRA.ipv6.itgate.net                           15.467ms asymm  9 
 6:  be11.Jolly-Jumper.MIL3.ipv6.ITgate.net               14.831ms 
 7:  2001:1418:1::1382                                    15.247ms asymm  8 
 8:  2001:1418:9:ff::172                                  14.680ms asymm  9 
 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

From SLO host (T-2)   openRFC 4890 ✓

filter likely at: (none) · min PMTU on path: 1500

Path (traceroute + mtr + PTR)

tracepath -6

 1?: [LOCALHOST]                        0.029ms pmtu 1500
 1:  no reply
 2:  2a01:260:1::225                                       5.079ms 
 3:  2a01-260-1-1--9c.core6.t-2.net                        1.934ms 
 4:  hurricane-electric.nikhef.nlsix.net                  35.175ms 
 5:  no reply
 6:  no reply
 7:  be11.Jolly-Jumper.MIL3.ipv6.ITgate.net               34.218ms asymm  8 
 8:  2001:1418:1::1382                                    34.339ms asymm  9 
 9:  2001:1418:1::1391                                    34.235ms 
10:  2001:1418:9:ff::172                                  34.221ms 
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