AS42858 - WeTi-AS Limberger Handelsgesellschaft m.b.HPI/PARFC 4890 ✓RPKI -ASPA -

AS overview

Test target: 2a04:f81::10 · dns1.weti.net · address space: mixed · prefixes announced: 1

prefix(es): 2a04:f80::/29

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

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

At least one router inside AS42858's announced prefix replied during the random-target probe. Hop(s): 2a04:f81:ffff::2. 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 2026-09-22T13:55:18Z

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

tracepath -6

 1?: [LOCALHOST]                        0.024ms pmtu 1500
 1:  _gateway                                              0.556ms 
 1:  _gateway                                              0.519ms 
 2:  sox-pn.sox.rs                                         7.961ms 
 3:  2001:7f8:1e:8::3d                                     1.082ms asymm  2 
 4:  ae8-930.RT.IRX.VIE.AT.retn.net                       11.254ms asymm  3 
 5:  no reply
 6:  no reply
 7:  2a03:c100:100:d::201                                 20.411ms asymm  5 
 8:  dns1.weti.net                                        19.130ms reached
     Resume: pmtu 1500 hops 8 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]                        0.022ms pmtu 1500
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  0.490ms 
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  0.492ms 
 2:  ae0-2453.cr10.ber01.lwlcom.net                        1.236ms 
 3:  ae0-40.cr10.muc02.lwlcom.net                         11.605ms 
 4:  ae0-10.cr10.muc01.lwlcom.net                         11.808ms 
 5:  2001:7f8:30:0:2:1:4:9808                             19.200ms 
 6:  2a03:c100:c:14::1                                    37.449ms 
 7:  2a03:c100:100:d::201                                 25.102ms 
 8:  ns1.weti.net                                         25.387ms reached
     Resume: pmtu 1500 hops 8 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]                        0.016ms pmtu 1500
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                  0.373ms 
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                  0.338ms 
 2:  ae0-101.cr10.dus02.lwlcom.net                         0.455ms 
 3:  ae0-40.cr10.dus05.lwlcom.net                          0.569ms 
 4:  ae0-90.cr11.dus01.lwlcom.net                          0.646ms 
 5:  ae0-10.cr10.dus06.lwlcom.net                          0.618ms 
 6:  ae0-40.cr10.fra06.lwlcom.net                          4.065ms 
 7:  energieag.peering.cz                                 24.576ms 
 8:  2a03:c100:c:17::1                                    26.355ms 
 9:  no reply
10:  2a03:c100:100:d::201                                 31.295ms asymm  8 
11:  dns1.weti.net                                        31.256ms reached
     Resume: pmtu 1500 hops 11 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 5, hop 6, hop 8, hop 9, hop 10 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.042ms pmtu 1500
 1:  2a00:8642:42::2                                       4.037ms 
 1:  2a00:8642:42::2                                       2.937ms 
 2:  no reply
 3:  2a00:1ca8:1::194                                      4.319ms 
 4:  2a03:3f40::10:41                                      4.085ms 
 5:  2001:b28:3ff::1b1b:0:1                               29.711ms 
 6:  be9.core4.fra1.he.net                                32.758ms asymm  4 
 7:  be8.core1.prg1.he.net                                38.456ms asymm  5 
 8:  be3.core1.vie1.he.net                                57.641ms asymm  6 
 9:  2001:7f8:30:0:2:1:4:9808                             42.030ms asymm  7 
10:  no reply
11:  2a03:c100:100:d::201                                 46.258ms asymm  9 
12:  dns1.weti.net                                        55.221ms reached
     Resume: pmtu 1500 hops 12 back 10 

From ITA host (Karsolink)   openRFC 4890 ✓

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

Path (traceroute + mtr + PTR)

Rate-limited ICMPv6: hop 3, hop 5, hop 6, hop 7 (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:  2a12:d8c0:109f:121::a1                                1.085ms 
 3:  2a12:d8c0:101f:6::1                                  10.320ms 
 4:  no reply
 5:  100ge0-0-0-20.core1.vie1.he.net                      23.735ms 
 6:  no reply
 7:  no reply
 8:  2a03:c100:100:d::201                                 23.396ms 
 9:  ns1.weti.net                                         23.501ms reached
     Resume: pmtu 1500 hops 9 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, hop 6 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.024ms pmtu 9000
 1:  fw1-lju.6connect.com                                  0.729ms 
 1:  fw1-lju.6connect.com                                  0.488ms 
 2:  no reply
 3:  2a00:ee1:800:9::1                                     2.509ms 
 4:  2a00:ee0:1:10::2                                      1.344ms asymm  3 
 5:  2a00:ee0:1:15::2                                      1.568ms pmtu 1500
 5:  r-bgp-muc.power-speed.at                             16.674ms asymm  7 
 6:  no reply
 7:  2a03:c100:100:d::201                                 19.789ms asymm  6 
 8:  dns1.weti.net                                        20.877ms reached
     Resume: pmtu 1500 hops 8 back 8 

From SLO host (T-2)   openRFC 4890 ✓

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

Path (traceroute + mtr + PTR)

Rate-limited ICMPv6: hop 7, hop 8 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.058ms pmtu 1500
 1:  2a01:261:313:b814::1                                  0.730ms 
 2:  2a01:260:1::225                                       2.595ms 
 3:  2a01-260-1-1--9c.core6.t-2.net                        2.728ms 
 4:  2a01-260-1-1--38.core6.t-2.net                        2.163ms asymm  3 
 5:  100ge0-0-0-31.core1.vie1.he.net                      11.857ms 
 6:  100ge0-0-0-31.core1.vie1.he.net                      10.879ms asymm  5 
 7:  no reply
 8:  2a03:c100:100:d::201                                 17.199ms asymm  7 
 9:  ns1.weti.net                                         18.394ms reached
     Resume: pmtu 1500 hops 9 back 8