AS24992 - DIC-AS DIC Online WolfPARFC 4890 ✓RPKI -ASPA -

AS overview

Test target: 2a02:2b10:8000::1 · dns1.dic.at · address space: PA · prefixes announced: 1

prefix(es): 2a02:2b10::/32

VIX / AAIX / SAIX / TIROL-IX / ERA-IX peering

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

We probed 35 arbitrary IPv6 address(es) inside AS24992's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2001:678:c1c:80a0::2 at hop 23 - that router does not answer ICMPv6 Echo. This is not in AS24992'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 2026-09-22T13:53:23Z

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)

tracepath -6

 1?: [LOCALHOST]                        0.038ms pmtu 1500
 1:  _gateway                                              0.990ms 
 1:  _gateway                                              0.553ms 
 2:  sox-pn.sox.rs                                         0.920ms 
 3:  2001:7f8:1e:8::3d                                     1.254ms asymm  2 
 4:  ae8-930.RT.IRX.VIE.AT.retn.net                       13.001ms asymm  3 
 5:  vix-ip6-et-0-1-2-0-r60.inx.vie.at.nextlayer.net      31.717ms asymm  3 
 6:  no reply
 7:  2001:678:c1c:80a0::2                                 13.699ms asymm  8 
 8:  dns1.dic.at                                          13.510ms !A
     Resume: pmtu 1500 

From DE host (Berlin)   openRFC 4890 ✓

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

Path (traceroute + mtr + PTR)

Rate-limited ICMPv6: hop 8 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.040ms pmtu 1500
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  0.851ms 
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  0.723ms 
 2:  ae0-2453.cr10.ber01.lwlcom.net                        1.138ms 
 3:  ae0-150.cr10.fra01.lwlcom.net                        10.629ms asymm  7 
 4:  ae0-100.cr10.fra02.lwlcom.net                        11.103ms asymm  8 
 5:  ae0-10.cr10.fra06.lwlcom.net                         10.437ms asymm  7 
 6:  nextlayer.peering.cz                                 19.030ms asymm  8 
 7:  no reply
 8:  2001:678:c1c:80a0::2                                 23.280ms asymm 14 
 9:  dns1.dic.at                                          23.346ms !A
     Resume: pmtu 1500 

From DE host (Düsseldorf)   openRFC 4890 ✓

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

Path (traceroute + mtr + PTR)

Rate-limited ICMPv6: hop 8 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.015ms pmtu 1500
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                  0.441ms 
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                  0.740ms 
 2:  eth1-0-12-h5594.edge5-dus1.bb.wiit.network            1.853ms 
 3:  no reply
 4:  lag11.core3-dus1.bb.wiit.network                      0.281ms 
 5:  lag2.core1-dus-ix.bb.wiit.network                     0.648ms 
 6:  de-cix.r60.inx.fra.de.nextlayer.net                   3.861ms 
 7:  no reply
 8:  no reply
 9:  dns1.dic.at                                          15.508ms !A
     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, hop 6 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.022ms pmtu 1500
 1:  2a00:8642:42::2                                       2.511ms 
 1:  2a00:8642:42::2                                       3.809ms 
 2:  no reply
 3:  2a00:1ca8:1::194                                      6.791ms 
 4:  2a03:3f40::10:41                                      5.132ms 
 5:  2001:b28:3ff::1b1b:0:1                               33.216ms 
 6:  be2.core1.cph1.he.net                                29.014ms asymm  4 
 7:  be7.core3.ams1.he.net                                30.681ms asymm  3 
 8:  de-cix.r60.inx.fra.de.nextlayer.net                  41.252ms 
 9:  ams-ix.r06.nikh.ams.nl.nextlayer.net                 44.834ms asymm  8 
10:  no reply
11:  dns1.dic.at                                          41.143ms !A
     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]                        0.047ms pmtu 1500
 1:  no reply
 2:  2a12:d8c0:109f:121::a1                                0.703ms 
 3:  no reply
 4:  no reply
 5:  be47.core1.mil2.he.net                               12.267ms 
 6:  be1.core1.zrh2.he.net                                13.559ms 
 7:  no reply
 8:  be1.core3.zrh3.he.net                                15.288ms 
 9:  no reply
10:  no reply
11:  no reply
12:  dns1.dic.at                                          18.257ms !A
     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]                        0.031ms pmtu 9000
 1:  fw1-lju.6connect.com                                  0.748ms 
 1:  fw1-lju.6connect.com                                  0.521ms 
 2:  no reply
 3:  2a00:ee1:800:9::1                                     2.641ms 
 4:  2a00:ee0:1:15::2                                      1.443ms asymm  3 
 5:  2a00:ee0:1:10::2                                      1.588ms pmtu 1500
 5:  de-cix.r60.inx.fra.de.nextlayer.net                  15.526ms asymm  6 
 6:  no reply
 7:  no reply
 8:  dns1.dic.at                                          22.187ms !A
     Resume: pmtu 1500 

From SLO host (T-2)   openRFC 4890 ✓

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

Path (traceroute + mtr + PTR)

Rate-limited ICMPv6: hop 6 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.028ms pmtu 1500
 1:  no reply
 2:  2a01:260:1::225                                       2.957ms 
 3:  2a01-260-1-1--9c.core6.t-2.net                        3.967ms 
 4:  2a01-260-1-1--38.core6.t-2.net                        2.405ms asymm  3 
 5:  100ge0-0-0-31.core1.vie1.he.net                      11.945ms 
 6:  100ge0-0-0-31.core1.vie1.he.net                      13.126ms asymm  5 
 7:  vix-ip6-et-0-1-2-0-r60.inx.vie.at.nextlayer.net       9.630ms asymm  5 
 8:  2001:678:c1c:80a0::2                                 11.721ms asymm 10 
 9:  dns1.dic.at                                          10.568ms !A
     Resume: pmtu 1500