AS200683 - EP-Puehringer Elektro PuehringerPARFC 4890 ✓RPKI ✓ 1/1ASPA -

AS overview

Test target: 2a05:1400::1 · static prefix probe · address space: PA · prefixes announced: 1

prefix(es): 2a05:1400::/29

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

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

We probed 35 arbitrary IPv6 address(es) inside AS200683's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2a05:d9c0:1:c::1 at hop 13 - that router answers ICMPv6 Echo. This is not in AS200683'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 2026-09-23T13:35:46Z

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]                        0.015ms pmtu 1500
 1:  _gateway                                              0.425ms 
 1:  _gateway                                              0.560ms 
 2:  sox-pn.sox.rs                                         0.577ms 
 3:  2001:7f8:1e:8::3d                                     0.678ms asymm  2 
 4:  ae8-930.RT.IRX.VIE.AT.retn.net                       12.948ms asymm  3 
 5:  vix-ip6-et-0-1-2-0-r60.inx.vie.at.nextlayer.net      11.317ms asymm  3 
 6:  ip6-ae2-0-r32.inx.vie.nextlayer.net                  13.779ms asymm  7 
 7:  2a05:1400::1                                         15.948ms reached
     Resume: pmtu 1500 hops 7 back 6 

From DE host (Berlin)   openRFC 4890 ✓

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

Path (traceroute + mtr + PTR)

tracepath -6

 1?: [LOCALHOST]                        0.028ms pmtu 1500
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  0.515ms 
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  0.558ms 
 2:  ae0-2453.cr10.ber01.lwlcom.net                        0.898ms 
 3:  ae3-90.cr10.ham01.lwlcom.net                          5.124ms 
 4:  ae0-50.cr11.ham01.lwlcom.net                          5.222ms 
 5:  2a00:c380:f000::4b                                    5.630ms asymm  4 
 6:  ae4-2087.dus10.core-backbone.com                     11.806ms asymm  5 
 7:  ae43-2026.fra30.core-backbone.com                    11.612ms asymm  5 
 8:  ae16-2123.fra40.core-backbone.com                    11.734ms asymm  6 
 9:  ae8-2027.muc10.core-backbone.com                     15.673ms asymm  8 
10:  ae1-2030.muc20.core-backbone.com                     15.554ms asymm  7 
11:  ae1-2028.vie10.core-backbone.com                     21.226ms asymm  8 
12:  vix.net.riepert.at                                   21.896ms asymm  5 
13:  po15-v500.r102.tz1.net.riepert.at                    25.146ms asymm  6 
14:  2a05:d9c0:1:11::2                                    25.184ms asymm  7 
15:  2a05:1400::1                                         25.404ms reached
     Resume: pmtu 1500 hops 15 back 8 

From DE host (Düsseldorf)   openRFC 4890 ✓

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

Path (traceroute + mtr + PTR)

tracepath -6

 1?: [LOCALHOST]                        0.017ms pmtu 1500
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                  0.397ms 
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                  0.329ms 
 2:  eth1-0-12-h5594.edge5-dus1.bb.wiit.network            1.037ms 
 3:  no reply
 4:  lag30.core3-dus1.bb.wiit.network                      0.562ms 
 5:  lag8.core1-dus-ix.bb.wiit.network                     0.608ms 
 6:  de-cix.r60.inx.fra.de.nextlayer.net                   4.040ms 
 7:  ip6-ae2-0-r32.inx.vie.nextlayer.net                  16.764ms asymm 12 
 8:  2a05:1400::1                                         23.655ms reached
     Resume: pmtu 1500 hops 8 back 9 

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

tracepath -6

 1?: [LOCALHOST]                        0.031ms pmtu 1500
 1:  2a00:8642:42::2                                       3.234ms 
 1:  2a00:8642:42::2                                       3.344ms 
 2:  gw.friends.steffann.nl                                3.467ms 
 3:  2a00:1ca8:1::194                                      5.080ms 
 4:  2a03:3f40::10:33                                      9.340ms 
 5:  no reply
 6:  no reply
 7:  po15-v500.r102.tz1.net.riepert.at                    30.081ms asymm  8 
 8:  2a05:1400::2                                         25.050ms asymm 13 
 9:  2a05:1400::1                                         24.663ms reached
     Resume: pmtu 1500 hops 9 back 12 

From ITA host (Karsolink)   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]                        0.029ms pmtu 1500
 1:  karsolink-01.net.karsolink.com                        0.619ms 
 1:  karsolink-01.net.karsolink.com                        1.019ms 
 2:  2a12:d8c0:109f:121::a1                                0.764ms 
 3:  no reply
 4:  no reply
 5:  be47.core1.mil2.he.net                               12.330ms 
 6:  be1.core1.zrh2.he.net                                14.323ms 
 7:  no reply
 8:  be1.core3.zrh3.he.net                                14.501ms 
 9:  no reply
10:  ip6-ae2-0-r32.inx.vie.nextlayer.net                  19.576ms asymm 11 
11:  2a05:1400::1                                         21.065ms reached
     Resume: pmtu 1500 hops 11 back 9 

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]                        0.037ms pmtu 9000
 1:  fw1-lju.6connect.com                                  0.620ms 
 1:  fw1-lju.6connect.com                                  0.674ms 
 2:  no reply
 3:  no reply
 4:  2a00:ee0:1:15::2                                      2.456ms asymm  3 
 5:  2a00:ee0:1:15::2                                     24.467ms pmtu 1500
 5:  de-cix.r60.inx.fra.de.nextlayer.net                  15.678ms asymm  6 
 6:  ip6-ae1-0-r32.inx.vie.nextlayer.net                  16.491ms asymm  9 
 7:  2a05:1400::1                                         18.863ms reached
     Resume: pmtu 1500 hops 7 back 10 

From SLO host (T-2)   openRFC 4890 ✓

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

Path (traceroute + mtr + PTR)

tracepath -6

 1?: [LOCALHOST]                        0.028ms pmtu 1500
 1:  2a01:261:313:b814::1                                  0.970ms 
 1:  no reply
 2:  2a01:260:1::225                                      16.128ms 
 3:  2a01-260-1-1--9c.core6.t-2.net                        3.299ms 
 4:  2a01-260-1-1--38.core6.t-2.net                        2.990ms asymm  3 
 5:  100ge0-0-0-31.core1.vie1.he.net                      12.312ms 
 6:  vix-ip6-et-0-1-2-0-r60.esh.vie.at.nextlayer.net      10.287ms asymm  5 
 7:  vix-ip6-et-0-1-2-0-r60.esh.vie.at.nextlayer.net       9.637ms asymm  5 
 8:  ip6-ae2-0-r32.inx.vie.nextlayer.net                   9.929ms asymm  9 
 9:  2a05:1400::1                                         13.591ms reached
     Resume: pmtu 1500 hops 9 back 8