AS208432 - posdata-as Posdata SRLPARFC 4890 ✓RPKI -ASPA -

AS overview

Test target: 2a0e:8c80::1 · static prefix probe · address space: PA · prefixes announced: 1

prefix(es): 2a0e:8c80::/29

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

We probed 35 arbitrary IPv6 address(es) inside AS208432's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2a06:7d40:254::2 at hop 13 - that router answers ICMPv6 Echo. This is not in AS208432'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 2026-09-23T12:07:43Z

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]                        0.016ms pmtu 1500
 1:  _gateway                                              0.496ms 
 1:  _gateway                                              0.525ms 
 2:  sox-pn.sox.rs                                         0.531ms 
 3:  2001:7f8:1e:8::3d                                     0.805ms asymm  2 
 4:  ae8-930.RT.IRX.VIE.AT.retn.net                       12.880ms asymm  3 
 5:  RT.TH2.LON.UK.retn.net                               33.617ms asymm  6 
 6:  2001:7f8:4::867c:1                                   45.066ms asymm  5 
 7:  2a06:7d40:26::1                                      56.356ms asymm  6 
 8:  2a0e:8c80::1                                         61.074ms reached
     Resume: pmtu 1500 hops 8 back 7 

From DE host (Berlin)   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]                        0.017ms pmtu 1500
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  0.573ms 
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  0.531ms 
 2:  ae0-2453.cr10.ber01.lwlcom.net                        0.882ms 
 3:  ae0-150.cr10.fra01.lwlcom.net                        10.437ms asymm  7 
 4:  ae0-20.cr10.fra07.lwlcom.net                         10.637ms asymm  6 
 5:  as6461.frankfurt.megaport.com                         8.166ms asymm  6 
 6:  ae21.cr2.fra9.de.zip.zayo.com                        17.863ms asymm  9 
 7:  ae21.cr2.fra9.de.zip.zayo.com                        17.725ms asymm  9 
 8:  2a00:16f8:11::dba                                    19.656ms asymm 11 
 9:  2a06:7d40:254::2                                     40.034ms asymm 12 
10:  2a0e:8c80::1                                         40.311ms reached
     Resume: pmtu 1500 hops 10 back 13 

From DE host (Düsseldorf)   openRFC 4890 ✓

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

Path (traceroute + mtr + PTR)

tracepath -6

 1?: [LOCALHOST]                        0.116ms pmtu 1500
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                  0.306ms 
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                  0.274ms 
 2:  eth1-0-12-h5594.edge5-dus1.bb.wiit.network            1.126ms 
 3:  no reply
 4:  lag30.core3-dus1.bb.wiit.network                      0.430ms 
 5:  lag0-vl1011.core1-fra-ix.bb.wiit.network              4.602ms 
 6:  lag0-vl1001.core1-nbg-ncd.bb.wiit.network             7.187ms 
 7:  lag0-vl6.core2-nbg-ncd.bb.wiit.network                7.132ms 
 8:  lag0-vl1006.core2-muc2.bb.wiit.network                9.558ms 
 9:  lag0-vl1009.core1-muc-eq3.bb.wiit.network             9.990ms 
10:  lag0-vl1001.core1-pda-vsix.bb.wiit.network           20.470ms 
11:  lag0-vl1001.core1-mil-mix.bb.wiit.network            20.096ms asymm  9 
12:  glpr-v6.mix-it.net                                   20.457ms asymm 10 
13:  2a06:7d40:254::2                                     36.310ms asymm 11 
14:  2a0e:8c80::1                                         31.759ms reached
     Resume: pmtu 1500 hops 14 back 12 

From NL host (go6lab)   openRFC 4890 ✓

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

Path (traceroute + mtr + PTR)

tracepath -6

 1?: [LOCALHOST]                        0.031ms pmtu 1500
 1:  2a00:8642:42::2                                       2.380ms 
 1:  2a00:8642:42::2                                       2.039ms 
 2:  no reply
 3:  2a00:1ca8:1::194                                      7.782ms 
 4:  2a03:3f40::10:33                                     12.543ms 
 5:  8route.interxionfra11.nlsix.net                      30.218ms asymm  7 
 6:  2a06:7d40:254::2                                     51.116ms asymm  8 
 7:  2a0e:8c80::1                                         54.152ms reached
     Resume: pmtu 1500 hops 7 back 9 

From ITA host (Karsolink)   openRFC 4890 ✓

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

Path (traceroute + mtr + PTR)

tracepath -6

 1?: [LOCALHOST]                        0.034ms pmtu 1500
 1:  karsolink-01.net.karsolink.com                        0.652ms 
 1:  karsolink-01.net.karsolink.com                        0.887ms 
 2:  2a12:d8c0:109f:121::a1                                0.662ms 
 3:  no reply
 4:  glpr-v6.mix-it.net                                    9.148ms 
 5:  2a06:7d40:254::2                                     25.049ms 
 6:  2a0e:8c80::1                                        177.575ms reached
     Resume: pmtu 1500 hops 6 back 6 

From SLO host (6connect)   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]                        0.020ms pmtu 9000
 1:  fw1-lju.6connect.com                                  0.453ms 
 1:  fw1-lju.6connect.com                                  0.935ms 
 2:  no reply
 3:  2a03:a100:0:201:1::1                                  0.969ms 
 4:  2a03:a100:0:201:1::1                                  0.801ms pmtu 1500
 4:  no reply
 5:  100ge0-0-0-5.core1.vie1.he.net                        8.443ms 
 6:  be4.core2.fra2.he.net                                19.352ms 
 7:  be2.core2.ams2.he.net                                26.325ms 
 8:  8route.interxionfra11.nlsix.net                      23.636ms asymm  7 
 9:  2a06:7d40:26::1                                      39.832ms asymm  7 
10:  2a0e:8c80::1                                         39.385ms reached
     Resume: pmtu 1500 hops 10 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]                        0.029ms pmtu 1500
 1:  no reply
 2:  2a01:260:1::225                                      10.971ms 
 3:  2a01-260-1-1--9a.core6.t-2.net                        3.696ms 
 4:  2a01-260-1-1--38.core6.t-2.net                        2.427ms asymm  3 
 5:  100ge0-0-0-31.core1.vie1.he.net                      13.173ms 
 6:  be4.core2.fra2.he.net                                37.342ms asymm  5 
 7:  be4.core2.fra2.he.net                                36.180ms asymm  5 
 8:  8route.interxionfra11.nlsix.net                      49.818ms asymm 10 
 9:  2a06:7d40:26::1                                      59.029ms asymm 11 
10:  2a06:7d40:26::1                                      59.212ms asymm 11 
11:  2a0e:8c80::1                                         59.509ms reached
     Resume: pmtu 1500 hops 11 back 12