AS34606 - ASN-BBBELL B.B.Bell SPAPARFC 4890 ✓RPKI ✓ 1/1ASPA -

AS overview

Test target: 2a06:8580::1 · static prefix probe · address space: PA · prefixes announced: 1

prefix(es): 2a06:8580::/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 AS34606's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2a02:260:0:2::2 at hop 17 - that router does not answer ICMPv6 Echo. This is not in AS34606'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 2026-09-23T12:05:02Z

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 3, hop 4, 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                                              0.634ms 
 1:  _gateway                                              0.612ms 
 2:  sox-pn.sox.rs                                         0.514ms 
 3:  e0-33.core2.beg1.he.net                               1.440ms 
 4:  e0-34.core2.bts1.he.net                               8.593ms 
 5:  100ge0-0-0-2.core1.vie1.he.net                       11.989ms 
 6:  no reply
 7:  bbbell.topix.it                                      22.533ms asymm 10 
 8:  2a02:260:0:1::17                                     22.074ms asymm 11 
 9:  2a02:260:0:7::2                                      22.214ms 
10:  2a02:260:0:1::23                                     22.434ms 
11:  2a06:8580::1                                         21.571ms reached
     Resume: pmtu 1500 hops 11 back 11 

From DE host (Berlin)   openRFC 4890 ✓

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

Path (traceroute + mtr + PTR)

tracepath -6

 1?: [LOCALHOST]                        0.071ms pmtu 1500
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  1.055ms 
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  0.639ms 
 2:  ae0-2453.cr10.ber01.lwlcom.net                        1.180ms 
 3:  ae0-150.cr10.fra01.lwlcom.net                        10.207ms asymm  7 
 4:  ae0-100.cr10.fra02.lwlcom.net                        10.716ms asymm  8 
 5:  ae0-10.cr10.fra06.lwlcom.net                         10.190ms asymm  7 
 6:  ams-ix.1-ix.net                                      20.868ms asymm  8 
 7:  ams-ix.ipv6.itgate.net                               22.917ms asymm  6 
 8:  if-0-2-0-1.Muttley-Monster.TRN.ipv6.itgate.net       27.226ms 
 9:  bbbell-gw6.customer.itgate.net                       28.856ms asymm 12 
10:  2a02:260:0:1::15                                     28.509ms asymm 13 
11:  2a02:260:0:1::23                                     28.758ms asymm 12 
12:  2a06:8580::1                                         27.668ms reached
     Resume: pmtu 1500 hops 12 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]                        0.039ms pmtu 1500
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                  0.626ms 
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                  0.308ms 
 2:  eth1-0-12-h5594.edge5-dus1.bb.wiit.network           17.310ms 
 3:  no reply
 4:  lag11.core3-dus1.bb.wiit.network                      0.415ms 
 5:  lag0-vl1011.core1-fra-ix.bb.wiit.network              4.320ms 
 6:  lag0-vl1001.core1-nbg-ncd.bb.wiit.network             6.799ms 
 7:  lag0-vl6.core2-nbg-ncd.bb.wiit.network                6.755ms 
 8:  lag0-vl1006.core2-muc2.bb.wiit.network                9.491ms 
 9:  lag0-vl1009.core1-muc-eq3.bb.wiit.network             9.728ms 
10:  lag0-vl1001.core1-pda-vsix.bb.wiit.network           20.388ms 
11:  lag0-vl1001.core1-mil-mix.bb.wiit.network            20.167ms asymm  9 
12:  lag0-vl5.core3-mil-irid.bb.wiit.network              20.077ms asymm  8 
13:  bbbell.minap.it                                      42.829ms asymm  8 
14:  2a02:260:0:7::5                                      21.138ms asymm  9 
15:  2a02:260:0:7::                                       23.530ms asymm 10 
16:  2a02:260:0:1::23                                     23.799ms asymm 11 
17:  2a06:8580::1                                         22.631ms reached
     Resume: pmtu 1500 hops 17 back 12 

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]                        0.052ms pmtu 1500
 1:  2a00:8642:42::2                                       2.366ms 
 1:  2a00:8642:42::2                                       1.565ms 
 2:  gw.friends.steffann.nl                                9.098ms 
 3:  ccr2-ccr1.dc1.nogalliance.org                         2.499ms asymm  2 
 4:  ams-ix.ipv6.itgate.net                                5.006ms asymm  3 
 5:  if-0-2-0-1.Muttley-Monster.TRN.ipv6.itgate.net       21.447ms asymm  4 
 6:  bbbell-gw6.customer.itgate.net                       21.236ms asymm  5 
 7:  no reply
 8:  no reply
 9:  2a06:8580::1                                         23.950ms reached
     Resume: pmtu 1500 hops 9 back 8 

From ITA host (Karsolink)   openRFC 4890 ✓

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

Path (traceroute + mtr + PTR)

tracepath -6

 1?: [LOCALHOST]                        0.033ms pmtu 1500
 1:  no reply
 2:  no reply
 3:  2a12:d8c0:109f:106::a2                                3.485ms 
 4:  bbbell.topix.it                                      10.476ms 
 5:  2a02:260:0:7::7                                      11.262ms asymm  6 
 6:  2a02:260:0:1::23                                     10.556ms 
 7:  2a02:260:0:1::21                                     11.578ms asymm  6 
 8:  2a06:8580::1                                         11.035ms reached
     Resume: pmtu 1500 hops 8 back 7 

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

tracepath -6

 1?: [LOCALHOST]                        0.018ms pmtu 9000
 1:  fw1-lju.6connect.com                                  0.590ms 
 1:  fw1-lju.6connect.com                                  0.457ms 
 2:  no reply
 3:  2a03:a100:0:201:1::1                                  1.035ms 
 4:  2a03:a100:0:201:1::1                                  0.940ms pmtu 1500
 4:  e0-1.core1.lju1.he.net                                2.123ms 
 5:  no reply
 6:  port-channel1.core1.zag2.he.net                       4.179ms 
 7:  no reply
 8:  bbbell.minap.it                                      12.792ms 
 9:  2a02:260:0:7::5                                      13.116ms 
10:  2a02:260:0:7::2                                      15.584ms 
11:  2a02:260:0:1::23                                     15.233ms 
12:  2a06:8580::1                                         14.303ms reached
     Resume: pmtu 1500 hops 12 back 12 

From SLO host (T-2)   openRFC 4890 ✓

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

Path (traceroute + mtr + PTR)

Rate-limited ICMPv6: hop 6, hop 7, hop 13 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.034ms pmtu 1500
 1:  2a01:261:313:b814::1                                  1.036ms 
 2:  2a01:260:1::225                                       6.619ms 
 3:  2a01-260-1-1--9a.core6.t-2.net                        3.519ms 
 4:  2a01-260-1-1--39.core6.t-2.net                        2.999ms asymm  3 
 5:  hurricane-electric.nikhef.nlsix.net                  33.218ms asymm  4 
 6:  be3.core4.fra1.he.net                                37.617ms asymm  7 
 7:  be10.core1.zrh2.he.net                               45.522ms asymm  8 
 8:  be10.core1.zrh2.he.net                               45.720ms 
 9:  be1.core1.mil2.he.net                                35.019ms asymm  7 
10:  bbbell.topix.it                                      34.690ms 
11:  2a02:260:0:7::7                                      32.714ms asymm  8 
12:  2a02:260:0:1::17                                     34.082ms asymm 11 
13:  2a06:8580::1                                         33.281ms reached
     Resume: pmtu 1500 hops 13 back 11