AS210204 - klingeritaly KLINGER Italy srlPARFC 4890 ✓RPKI ✓ 1/1ASPA -

AS overview

Test target: 2a14:d900::1 · static prefix probe · address space: PA · prefixes announced: 1

prefix(es): 2a14:d900::/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 AS210204's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2a02:7d8:0:f::de at hop 17 - that router does not answer ICMPv6 Echo. This is not in AS210204'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 2026-09-23T12:09:50Z

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]                        0.009ms pmtu 1500
 1:  _gateway                                              0.505ms 
 1:  _gateway                                              0.586ms 
 2:  sox-pn.sox.rs                                         0.658ms 
 3:  e0-33.core2.beg1.he.net                               1.287ms 
 4:  e0-34.core2.bts1.he.net                               8.612ms 
 5:  100ge0-0-0-2.core1.vie1.he.net                       10.878ms 
 6:  no reply
 7:  irideos-AS3302-v6.mix-it.net                         26.789ms asymm  5 
 8:  2a02:7d8::104:9                                      27.889ms 
 9:  2a14:d900::1                                         27.665ms reached
     Resume: pmtu 1500 hops 9 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 5 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.016ms pmtu 1500
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  0.492ms 
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  0.639ms 
 2:  ae0-2453.cr10.ber01.lwlcom.net                        1.102ms 
 3:  ae0-150.cr10.fra01.lwlcom.net                        10.430ms asymm  7 
 4:  ae0-20.cr10.fra07.lwlcom.net                         10.497ms asymm  6 
 5:  no reply
 6:  lo0.0.edge1.Milan1.level3.net                        24.459ms asymm  8 
 7:  2001:1900:5:2:2::64da                                22.016ms asymm 10 
 8:  2a02:7d8::104:9                                      23.419ms asymm 13 
 9:  2a14:d900::1                                         22.460ms reached
     Resume: pmtu 1500 hops 9 back 12 

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                  0.374ms 
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                  0.303ms 
 2:  eth1-0-12-h5594.edge5-dus1.bb.wiit.network            1.123ms 
 3:  no reply
 4:  lag11.core3-dus1.bb.wiit.network                      0.688ms 
 5:  lag0-vl1011.core1-fra-ix.bb.wiit.network              4.602ms 
 6:  lag0-vl1001.core1-nbg-ncd.bb.wiit.network            21.939ms 
 7:  lag0-vl6.core2-nbg-ncd.bb.wiit.network                7.305ms 
 8:  lag0-vl1006.core2-muc2.bb.wiit.network               11.567ms 
 9:  lag0-vl1009.core1-muc-eq3.bb.wiit.network            10.014ms 
10:  lag0-vl1001.core1-pda-vsix.bb.wiit.network           20.666ms 
11:  lag0-vl1001.core1-mil-mix.bb.wiit.network            20.635ms asymm  9 
12:  lag0-vl5.core3-mil-irid.bb.wiit.network              20.342ms asymm  8 
13:  irideos.minap.it                                     20.671ms asymm  9 
14:  2a02:7d8::104:9                                      21.968ms asymm 12 
15:  2a14:d900::1                                         21.734ms reached
     Resume: pmtu 1500 hops 15 back 11 

From NL host (go6lab)   openRFC 4890 ✓

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

Path (traceroute + mtr + PTR)

tracepath -6

 1?: [LOCALHOST]                        0.053ms pmtu 1500
 1:  2a00:8642:42::2                                       4.747ms 
 1:  2a00:8642:42::2                                       3.512ms 
 2:  gw.friends.steffann.nl                                3.012ms 
 3:  2a00:1ca8:1::194                                      5.227ms 
 4:  2a03:3f40::10:41                                      5.076ms 
 5:  2001:978:2:40::3:1                                    6.315ms 
 6:  be3458.ccr42.ams03.atlas.cogentco.com                 6.493ms 
 7:  be3343.ccr41.fra05.atlas.cogentco.com                14.766ms 
 8:  be5516.ccr21.muc03.atlas.cogentco.com                20.375ms 
 9:  port-channel5892.ccr92.mil02.atlas.cogentco.com      26.877ms 
10:  be2155.rcr71.vce01.atlas.cogentco.com                33.224ms 
11:  be2440.rcr51.rom01.atlas.cogentco.com                39.560ms 
12:  2001:978:2:11::b:2                                   38.140ms 
13:  no reply
14:  no reply
15:  no reply
16:  2a02:7d8::104:9                                      48.104ms asymm 18 
17:  2a14:d900::1                                         49.499ms reached
     Resume: pmtu 1500 hops 17 back 17 

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:  no reply
 3:  2a12:d8c0:109f:106::a2                                3.695ms 
 4:  irideos-as3302-v6.mix-it.net                          9.453ms 
 5:  2a02:7d8::104:9                                       9.563ms asymm  7 
 6:  2a14:d900::1                                         10.199ms 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, 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                                  0.524ms 
 1:  fw1-lju.6connect.com                                  0.575ms 
 2:  no reply
 3:  2a03:a100:0:201:1::1                                  0.865ms 
 4:  2a03:a100:0:201:1::1                                  0.922ms pmtu 1500
 4:  e0-1.core1.lju1.he.net                                2.055ms 
 5:  no reply
 6:  port-channel1.core1.zag2.he.net                       4.041ms 
 7:  no reply
 8:  irideos-AS3302-v6.mix-it.net                         10.891ms asymm  6 
 9:  2a02:7d8::104:9                                      13.912ms asymm 11 
10:  2a14:d900::1                                         13.697ms reached
     Resume: pmtu 1500 hops 10 back 10 

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

tracepath -6

 1?: [LOCALHOST]                        0.027ms pmtu 1500
 1:  2a01:261:313:b814::1                                  0.975ms 
 2:  2a01:260:1::225                                       4.146ms 
 3:  2a01-260-1-1--9c.core6.t-2.net                        3.153ms 
 4:  2a01-260-1-1--39.core6.t-2.net                        3.050ms asymm  3 
 5:  hurricane-electric.nikhef.nlsix.net                  35.490ms asymm  4 
 6:  be7.core2.fra2.he.net                                42.513ms asymm  5 
 7:  be10.core1.zrh2.he.net                               53.757ms asymm  8 
 8:  be10.core1.zrh2.he.net                               51.434ms 
 9:  be1.core1.mil2.he.net                                38.467ms asymm  7 
10:  irideos-AS3302-v6.mix-it.net                         33.908ms asymm  7 
11:  retelit.topix.it                                     37.965ms asymm  7 
12:  2a02:7d8::104:9                                      36.515ms asymm 10 
13:  2a14:d900::1                                         39.483ms reached
     Resume: pmtu 1500 hops 13 back 9