AS47917 - RTV SlovenijaPARFC 4890 ✓RPKI -ASPA -

AS overview

Test target: 2a02:7a8::3 · via IPv6 Hitlist (responsive) · address space: PA · prefixes announced: 1

prefix(es): 2a02:7a8::/32

SIX peering

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

We probed 35 arbitrary IPv6 address(es) inside AS47917's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2a02:d90:5000:e000::2 at hop 14 - that router answers ICMPv6 Echo. This is not in AS47917's announced prefix; operationally it's the AS-edge / peering interface (often on a SIX 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 2026-09-23T10:34:55Z

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]                        0.014ms pmtu 1500
 1:  _gateway                                              0.710ms 
 1:  _gateway                                              0.793ms 
 2:  2001:7f8:1e::4                                        2.251ms 
 3:  2001:7f8:30:0:2:1:4:3061                             18.757ms 
 4:  2a02:7a8::3                                          19.196ms reached
     Resume: pmtu 1500 hops 4 back 4 

From DE host (Berlin)   openRFC 4890 ✓

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

Path (traceroute + mtr + PTR)

tracepath -6

 1?: [LOCALHOST]                        0.020ms pmtu 1500
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  0.642ms 
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  0.633ms 
 2:  ae0-2453.cr10.ber01.lwlcom.net                        1.082ms 
 3:  ae0-10.cr10.ber03.lwlcom.net                          1.354ms 
 4:  ae0-15.cr11.dtm01.lwlcom.net                          8.753ms asymm  5 
 5:  ae0-10.cr10.dtm02.lwlcom.net                          8.703ms asymm  6 
 6:  ae0-50.cr10.dus02.lwlcom.net                          9.114ms asymm  3 
 7:  ae0-10.cr10.dus01.lwlcom.net                          9.191ms asymm  4 
 8:  ae6-60.cr10.ams01.lwlcom.net                         11.726ms asymm  5 
 9:  2001:7f8:12a::110                                    17.790ms asymm  7 
10:  ip6-2a02-2720-100b-1c--1.euroweb.ro                  27.598ms asymm  9 
11:  ip6-2a02-2720-100b-1c--2.euroweb.ro                  28.736ms asymm  5 
12:  2a02:7a8::3                                          29.204ms reached
     Resume: pmtu 1500 hops 12 back 6 

From DE host (Düsseldorf)   openRFC 4890 ✓

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

Path (traceroute + mtr + PTR)

tracepath -6

 1?: [LOCALHOST]                        0.023ms pmtu 1500
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                  0.497ms 
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                  0.331ms 
 2:  eth1-0-12-h5594.edge5-dus1.bb.wiit.network            2.112ms 
 3:  no reply
 4:  lag30.core3-dus1.bb.wiit.network                      0.514ms 
 5:  lag0-vl1011.core1-fra-ix.bb.wiit.network              4.340ms 
 6:  lag0-vl1001.core1-nbg-ncd.bb.wiit.network             6.993ms 
 7:  lag0-vl6.core2-nbg-ncd.bb.wiit.network                6.968ms 
 8:  lag0-vl1006.core2-muc2.bb.wiit.network                9.623ms 
 9:  lag0-vl1009.core1-muc-eq3.bb.wiit.network            10.035ms 
10:  lag0-vl1001.core1-pda-vsix.bb.wiit.network           20.334ms 
11:  lag0-vl1001.core1-mil-mix.bb.wiit.network            20.273ms asymm  9 
12:  stelkom-v6.mix-it.net                                30.871ms asymm 10 
13:  2a02:d90:2000:e001::1e                               34.819ms asymm  6 
14:  2a02:7a8::3                                          35.026ms reached
     Resume: pmtu 1500 hops 14 back 7 

From NL host (go6lab)   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]                        0.044ms pmtu 1500
 1:  ???                                                 729.774ms 
 1:  ???                                                   2.538ms 
 2:  no reply
 3:  2a00:1ca8:1::194                                      7.855ms 
 4:  2a03:3f40::10:41                                      4.146ms 
 5:  2a03:5f80:7::230:185                                 41.403ms 
 6:  ip6-2a02-2720-100b-1c--1.euroweb.ro                  40.788ms asymm  4 
 7:  ip6-2a02-2720-100b-1c--2.euroweb.ro                  48.641ms asymm  5 
 8:  2a02:7a8::3                                          47.842ms reached
     Resume: pmtu 1500 hops 8 back 6 

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:  no reply
 2:  2a12:d8c0:109f:121::a1                                0.939ms 
 3:  2a12:d8c0:101f:103::1                                 9.054ms 
 4:  stelkom-v6.mix-it.net                                19.708ms 
 5:  2a02:d90:2000:e001::1e                               19.769ms 
 6:  2a02:7a8::3                                          20.107ms 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)

tracepath -6

 1?: [LOCALHOST]                        0.026ms pmtu 9000
 1:  fw1-lju.6connect.com                                  0.702ms 
 1:  fw1-lju.6connect.com                                  0.773ms 
 2:  ccr-to-fw-ccr1-gw-lju.6connect.com                    1.093ms 
 3:  2a03:a100:0:201:1::1                                  1.286ms 
 4:  2a03:a100:0:201:1::1                                  5.322ms pmtu 1500
 4:  2a02:7a8::3                                           1.924ms reached
     Resume: pmtu 1500 hops 4 back 4 

From SLO host (T-2)   openRFC 4890 ✓

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

Path (traceroute + mtr + PTR)

tracepath -6

 1?: [LOCALHOST]                        0.026ms pmtu 1500
 1:  no reply
 2:  2a01:260:1::225                                       5.924ms 
 3:  2a01-260-1-1--9a.core6.t-2.net                        2.596ms 
 4:  2a02:7a8::3                                           3.722ms reached
     Resume: pmtu 1500 hops 4 back 4