AS212417 - Mordacchini MORDACCHINI SRLPARFC 4890 ✓RPKI ✓ 1/1ASPA -

AS overview

Test target: 2a09:9a00::1 · static prefix probe · address space: PA · prefixes announced: 1

prefix(es): 2a09:9a00::/29

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

We probed 35 arbitrary IPv6 address(es) inside AS212417's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2001:7f8:10::21:2417 at hop 13 - that router does not answer ICMPv6 Echo. This is not in AS212417'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

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 2026-09-23T12:06:08Z

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 5 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.013ms pmtu 1500
 1:  _gateway                                              0.376ms 
 1:  _gateway                                              0.325ms 
 2:  sox-pn.sox.rs                                         0.565ms 
 3:  e0-33.core2.beg1.he.net                               1.140ms 
 4:  e0-34.core2.bts1.he.net                               8.372ms 
 5:  100ge0-0-0-2.core1.vie1.he.net                       12.242ms 
 6:  no reply
 7:  port-channel2.core2.rom1.he.net                      28.702ms 
 8:  2a09:9a00::1                                         27.815ms reached
     Resume: pmtu 1500 hops 8 back 8 

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                  0.438ms 
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  0.377ms 
 2:  ae0-2453.cr10.ber01.lwlcom.net                        1.024ms 
 3:  ae0-150.cr10.fra01.lwlcom.net                        31.632ms asymm  7 
 4:  ae0-100.cr10.fra02.lwlcom.net                        10.620ms asymm  8 
 5:  2001:978:2:42::154:c                                 10.919ms asymm  9 
 6:  be5484.ccr41.fra05.atlas.cogentco.com                10.962ms asymm 10 
 7:  be5516.ccr21.muc03.atlas.cogentco.com                16.830ms asymm 11 
 8:  port-channel5892.ccr92.mil02.atlas.cogentco.com      24.583ms asymm 12 
 9:  be2434.rcr71.vce01.atlas.cogentco.com                29.366ms asymm 13 
10:  be2440.rcr51.rom01.atlas.cogentco.com                35.820ms asymm 14 
11:  2001:978:2:11::13                                    38.671ms asymm 15 
12:  2a09:9a00::1                                         48.637ms reached
     Resume: pmtu 1500 hops 12 back 14 

From DE host (Düsseldorf)   openRFC 4890 ✓

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

Path (traceroute + mtr + PTR)

tracepath -6

 1?: [LOCALHOST]                        0.019ms pmtu 1500
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                 31.199ms 
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                 10.090ms 
 2:  eth1-0-12-h5594.edge5-dus1.bb.wiit.network            1.156ms 
 3:  no reply
 4:  lag11.core3-dus1.bb.wiit.network                      0.512ms 
 5:  lag2.core1-dus-ix.bb.wiit.network                     0.617ms 
 6:  6te2-2.mivivxmr01.retelit.it                         14.027ms asymm 12 
 7:  2001:1bd0:0:2::5                                     13.998ms asymm 11 
 8:  2001:1bd0:0:2::b                                     24.951ms asymm 12 
 9:  2a09:9a00::1                                         25.911ms reached
     Resume: pmtu 1500 hops 9 back 13 

From NL host (go6lab)   openRFC 4890 ✓

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

Path (traceroute + mtr + PTR)

tracepath -6

 1?: [LOCALHOST]                        0.035ms pmtu 1500
 1:  2a00:8642:42::2                                       4.399ms 
 1:  2a00:8642:42::2                                       1.806ms 
 2:  no reply
 3:  2a00:1ca8:1::194                                      6.938ms 
 4:  2a03:3f40::10:41                                      2.812ms 
 5:  2001:978:2:40::3:1                                    7.254ms 
 6:  be3458.ccr42.ams03.atlas.cogentco.com                 5.522ms 
 7:  be3343.ccr41.fra05.atlas.cogentco.com                16.439ms 
 8:  be5516.ccr21.muc03.atlas.cogentco.com                18.466ms 
 9:  port-channel5891.ccr91.mil02.atlas.cogentco.com      29.087ms 
10:  be2155.rcr71.vce01.atlas.cogentco.com                30.948ms 
11:  be2440.rcr51.rom01.atlas.cogentco.com                37.262ms 
12:  2001:978:2:11::13                                    37.856ms 
13:  2a09:9a00::1                                         37.427ms reached
     Resume: pmtu 1500 hops 13 back 13 

From ITA host (Karsolink)   openRFC 4890 ✓

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

Path (traceroute + mtr + PTR)

Rate-limited ICMPv6: hop 4, hop 7 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.047ms pmtu 1500
 1:  no reply
 2:  no reply
 3:  no reply
 4:  retelit.topix.it                                     10.694ms asymm  7 
 5:  2001:1bd0:0:2::5                                     10.776ms asymm  6 
 6:  2001:1bd0:0:2::b                                     21.826ms asymm  7 
 7:  2a09:9a00::1                                         22.225ms reached
     Resume: pmtu 1500 hops 7 back 8 

From SLO host (6connect)   openRFC 4890 ✓

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

Path (traceroute + mtr + PTR)

Rate-limited ICMPv6: hop 4, hop 6 (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                                  0.688ms 
 1:  fw1-lju.6connect.com                                  0.668ms 
 2:  no reply
 3:  2a03:a100:0:201:1::1                                  1.193ms 
 4:  2a03:a100:0:201:1::1                                  0.852ms pmtu 1500
 4:  no reply
 5:  no reply
 6:  no reply
 7:  no reply
 8:  e0-36.core2.rom1.he.net                              20.966ms 
 9:  2a09:9a00::1                                         20.718ms reached
     Resume: pmtu 1500 hops 9 back 9 

From SLO host (T-2)   openRFC 4890 ✓

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

Path (traceroute + mtr + PTR)

tracepath -6

 1?: [LOCALHOST]                        0.086ms pmtu 1500
 1:  no reply
 2:  2a01:260:1::225                                      10.324ms 
 3:  2a01-260-1-1--9c.core6.t-2.net                        2.605ms 
 4:  2a01-260-1-1--39.core6.t-2.net                        2.856ms asymm  3 
 5:  hurricane-electric.nikhef.nlsix.net                  39.485ms asymm  4 
 6:  be3.core4.fra1.he.net                                43.074ms asymm  7 
 7:  be3.core4.fra1.he.net                                41.523ms 
 8:  be10.core1.zrh2.he.net                               51.632ms 
 9:  be1.core1.mil2.he.net                                41.770ms asymm  7 
10:  e0-36.core2.rom1.he.net                              46.253ms asymm  7 
11:  e0-36.core2.rom1.he.net                              43.456ms asymm  7 
12:  2a09:9a00::1                                         47.257ms reached
     Resume: pmtu 1500 hops 12 back 8