AS51790 - SIELPI/PARFC 4890 ✓RPKI ✓ 4/4ASPA -

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AS overview

Test target: 2a02:28b0:53::53 · dns1.siel.si · address space: mixed · prefixes announced: 4

prefix(es): 2a02:28b0::/32, 2a02:28b1::/32, 2a02:28b2::/32, 2a02:28b7::/32

Targets & per-vantage-point probe results (10 target(s) across 7 vantage point(s))

Source codes (hover any badge for full description): CUR=curated · NS/SOA/MX=DNS records · SPF=SPF TXT · DRV=holder-derived (www, ns1, mail, gw, …) · ATL=RIPE Atlas · PDB=PeeringDB · WHOIS=RIPE whois · RDAP=RIPE RDAP · HIT=IPv6 Hitlist · RTR=in-prefix path hop (router) · PRB=static prefix probe · SYN=synthetic prefix::1 fallback

Target IP / hostnameSourceSRB host (SOX, Belgrade)DE host (Berlin)DE host (Düsseldorf)NL host (go6lab)ITA host (Karsolink)SLO host (6connect)SLO host (T-2)
ping1500B:80:443reachedping1500B:80:443reachedping1500B:80:443reachedping1500B:80:443reachedping1500B:80:443reachedping1500B:80:443reachedping1500B:80:443reached
2a02:28b0:101:1299::1hit✓✓refusedrefused✓✓✓refusedrefused✓✓✓refusedrefused✓✓✓??✓✓✓refusedrefused✓✓✓refusedrefused✓✓✓refusedrefused✓
2a02:28b0:101:1299::2hit✓✓refusedrefused✓✓✓refusedrefused✓✓✓refusedrefused✓✓✓??✓✓✓refusedrefused-✓✓refusedrefused✓✓✓refusedrefused-
2a02:28b0:101:1499::1hit✓✓refusedrefused✓✓✓refusedrefused✓✓✓refusedrefused✓✓✓??✓✓✓refusedrefused-✓✓refusedrefused✓✓✓refusedrefused-
2a02:28b0:101:1499::2hit✓✓refusedrefused✓✓✓refusedrefused✓✓✓refusedrefused✓✓✓??✓✓✓refusedrefused✓✓✓refusedrefused✓✓✓refusedrefused✓
2a02:28b0:101:1699::1hit✓✓refusedrefused✓✓✓refusedrefused✓✓✓refusedrefused-✓✓??✓✓✓refusedrefused✓✓✓refusedrefused✓✓✓refusedrefused✓
2a02:28b0:101:1699::2hit✓✓refusedrefused✓✓✓refusedrefused✓✓✓refusedrefused-✓✓??✓✓✓refusedrefused✓✓✓refusedrefused✓✓✓refusedrefused-
2a02:28b0:101:1::1hit✓✓refusedrefused✓✓✓refusedrefused✓✓✓refusedrefused✓✓✓??✓✓✓refusedrefused-✓✓refusedrefused✓✓✓refusedrefused✓
2a02:28b0:101:247::1hit✓✓refusedrefused✓✓✓refusedrefused✓✓✓refusedrefused✓✓✓??✓✓✓refusedrefused✓✓✓refusedrefused✓✓✓refusedrefused✓
2a02:28b0:101:800::1rtr✓✓refusedrefused✓✓✓refusedrefused✓✓✓refusedrefused✓✓✓??✓✓✓refusedrefused✓✓✓refusedrefused✓✓✓refusedrefused✓
2a02:28b0:53::53
dns1.siel.si		NS✓✓refusedrefused✓✓✓refusedrefused✓✓✓refusedrefused✓✓✓refusedrefused✓✓✓refusedrefused-✓✓refusedrefused✓✓✓refusedrefused✓

SIX peering

SIX member - open peering, peering member, since 2015-05-05. IPv6 LAN: 2001:7f8:46:0:0::5:1790. Locations: lj_ijs, lj_tpl.

  • rs1-lan1-ipv6 → 2001:7f8:46::5:1790 Established (loc: lj_ijs, since 2026-09-19)
  • rs1-lan1-ipv6 → 2001:7f8:46:0:1:0:5:1790 Established (loc: lj_tpl, since 2026-08-31)
  • rs2-lan1-ipv6 → 2001:7f8:46::5:1790 Established (loc: lj_ijs, since 2026-09-08)
  • rs2-lan1-ipv6 → 2001:7f8:46:0:1:0:5:1790 Established (loc: lj_tpl, since 2026-08-24)

Announces via SIX route servers: 5 prefix(es) - 2a02:28b0::/32, 2a02:28b1::/32, 2a02:28b7::/32, 2a04:dd40::/32, 2a0e:ce40::/32

RPKI & ASPA

4 of 4 prefix(es) covered by a valid ROA.

PrefixRPKI stateReasonCovering VRP(s)
2a02:28b1::/32✓ validmatched VRP (correct origin, length within maxLength)AS51790 /32 maxLen 32 (ripe)
2a02:28b0::/32✓ validmatched VRP (correct origin, length within maxLength)AS51790 /32 maxLen 32 (ripe)
2a02:28b7::/32✓ validmatched VRP (correct origin, length within maxLength)AS51790 /32 maxLen 32 (ripe)
2a02:28b2::/32✓ validmatched VRP (correct origin, length within maxLength)AS51790 /32 maxLen 32 (ripe)

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

At least one router inside AS51790's announced prefix replied during the random-target probe. Hop(s): 2a02:28b0:101:1299::1, 2a02:28b0:101:1499::1, 2a02:28b0:101:1699::1, 2a02:28b0:101:1699::2, 2a02:28b0:101:823::1. 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 2026-09-23T10:34:47Z

tracepath6 per-hop PMTU drilldown

For each target where Type 2 verdicts disagreed across vantages, tracepath -6 ran from every vantage to capture per-hop PMTU evolution along that vantage's actual forward path. A pmtu change entry on a hop means that hop's router generated a PTB and we observed the shrink; absence of any change combined with a not_honored verdict suggests a router somewhere downstream is silently dropping >MTU packets (an RFC 4890 violation) rather than sending a PTB.

Target 2a02:28b0:101:1299::2

amsterdam - verdict ?

(no hops captured)

belgrade - verdict honored

verdict = honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22001:7f8:1e::121
32a03:dd80:1:1::1
42a03:dd80:2:e::1
52a00:fc0:4314:c::b
62a02:28b0:101:5001::1
72a02:28b0:101:1299::2
berlin - verdict honored

verdict = honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22a06:d1c0::dead:beef:1c02
32a00:c380:b200:230::178
42a00:c380:b200:230::177
52001:7f8:30:0:2:1:0:3212
62a00:fc0:4314:c::a
72a00:fc0:4314:c::b
82a02:28b0:101:5001::1
92a02:28b0:101:1299::2
duseldorf - verdict honored

verdict = honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22001:7f8:9e::1b1b:0:1
32001:470:0:52e::1
42001:470:e:1e::2
52001:470:e:a7::2
62001:470:0:578::2
72a02:28b0:101:1299::2
go6lab - verdict honored

verdict = honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22a00:8642:1000:f000::1
32001:7f8:b7::a500:6939:1
42001:470:e:38::2
52001:470:e:1e::2
62001:470:e:a7::2
72001:470:0:578::2
82a02:28b0:101:1299::2
karsolink - verdict not_honored

verdict = not_honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22a12:d8c0:109f:121::a1
32a12:d8c0:101f:6::1
4<span class='muted'>no reply</span>
52001:470:0:6ea::2
6<span class='muted'>no reply</span>
72001:470:0:577::2
82a02:28b0:101:1299::2
odin - verdict honored

verdict = honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22607:fae0:a000:2::2
32a03:a100:0:201:1::1
42a03:a100:0:201:1::1
52a02:28b0:101:1699::1
62a02:28b0:101:1299::2
t2 - verdict honored

verdict = honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22a01:260:1::225
32a01:260:1:1::9c
42001:7f8:46::5:1790
52a02:28b0:101:1699::1
62a02:28b0:101:1299::2

Target 2a02:28b0:101:1499::2

amsterdam - verdict ?

(no hops captured)

belgrade - verdict honored

verdict = honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22001:7f8:1e::121
32a03:dd80:1:1::1
42a03:dd80:2:e::1
52a00:fc0:4314:c::b
62a02:28b0:101:5001::1
72a02:28b0:101:1499::2
berlin - verdict honored

verdict = honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22a06:d1c0::dead:beef:1c02
32a00:c380:b200:230::178
42a00:c380:b200:230::177
52001:7f8:30:0:2:1:0:3212
62a00:fc0:4314:c::a
72a00:fc0:4314:c::b
82a02:28b0:101:5001::1
92a02:28b0:101:1499::2
duseldorf - verdict honored

verdict = honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22001:7f8:9e::1b1b:0:1
32001:470:0:52e::1
42001:470:e:1e::2
52001:470:e:a7::2
62001:470:0:578::2
72a02:28b0:101:1499::2
go6lab - verdict honored

verdict = honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22a00:8642:1000:f000::1
32001:7f8:b7::a500:6939:1
42001:470:e:38::2
52001:470:e:1e::2
62001:470:e:a7::2
72001:470:0:578::2
82001:470:435:1::2
92a02:28b0:101:1499::2
karsolink - verdict not_honored

verdict = not_honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22a12:d8c0:109f:121::a1
32a12:d8c0:101f:6::1
4<span class='muted'>no reply</span>
52001:470:0:6ea::2
6<span class='muted'>no reply</span>
72001:470:0:577::2
82a02:28b0:101:1499::2
odin - verdict honored

verdict = honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22607:fae0:a000:2::2
32a03:a100:0:201:1::1
42a03:a100:0:201:1::1
52a02:28b0:101:1499::2
t2 - verdict honored

verdict = honored; final pmtu = 1500

#hop IPpmtu change
1<span class='muted'>no reply</span>
22a01:260:1::225
32a01:260:1:1::9a
42a02:28b0:101:1499::2

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 ↗

multi-vantage path diagram for AS51790

From SRB host (SOX, Belgrade)   openRFC 4890 ✓

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

4/4
Echo small (56B) 10.7ms
4/4
Echo 1500B (DF) 10.7ms
yes
Type 1 dest-unreach
443,80
TCP responds on

Path (traceroute + mtr + PTR)

#IP / PTRRTTmtr lossASAS holder
12a09:ab81::10.3ms0%*AS60733PERKE-NET - ZORAN PEROVIC trading as Agencija Perke.NET, RS
22001:7f8:1e::1211.1ms80%AS13004SOX - Serbian Open Exchange DOO, RS
32a03:dd80:1:1::12.4ms-AS21215UGNI - UNITED GROUP NETWORK INFRASTRUCTURE d.o.o. Beograd, RS
4*-0%-
52a00:fc0:4314:c::b13.1ms0%AS3212TELEMACH - Telemach Slovenija d.o.o., SI
62a02:28b0:101:866::112.0ms0%AS51790SIEL - SIEL, d.o.o., SI
7dns1.siel.si
2a02:28b0:53::53		10.7ms0%AS51790SIEL - SIEL, d.o.o., SI

Rate-limited ICMPv6: hop 2 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.010ms pmtu 1500
 1:  _gateway                                              0.860ms 
 1:  _gateway                                              0.538ms 
 2:  no reply
 3:  2a03:dd80:1:1::1                                      1.665ms asymm  2 
 4:  2a03:dd80:2:e::1                                     13.947ms 
 5:  2a00:fc0:4314:c::b                                   13.291ms 
 6:  2a02:28b0:101:866::1                                 85.015ms asymm  8 
 7:  dns1.siel.si                                         11.145ms reached
     Resume: pmtu 1500 hops 7 back 9

From DE host (Berlin)   openRFC 4890 ✓

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

4/4
Echo small (56B) 25.3ms
4/4
Echo 1500B (DF) 25.3ms
yes
Type 1 dest-unreach
443,80
TCP responds on

Path (traceroute + mtr + PTR)

#IP / PTRRTTmtr lossASAS holder
1*-0%*-
2ae0-2453.cr10.ber01.lwlcom.net
2a06:d1c0::dead:beef:1c02		0.6ms0%*AS59645WYBT-NET - Tobias Fiebig, DE
3ae0-40.cr10.muc02.lwlcom.net
2a00:c380:b200:230::178		11.5ms0%AS50629LWLCOM - LWLcom GmbH, DE
4ae0-10.cr10.muc01.lwlcom.net
2a00:c380:b200:230::177		11.4ms0%AS50629LWLCOM - LWLcom GmbH, DE
5*-0%-
62a00:fc0:4314:c::a29.8ms-AS3212TELEMACH - Telemach Slovenija d.o.o., SI
72a00:fc0:4314:c::b27.9ms0%AS3212TELEMACH - Telemach Slovenija d.o.o., SI
82a02:28b0:101:866::129.1ms0%AS51790SIEL - SIEL, d.o.o., SI
9dns1.siel.si
2a02:28b0:53::53		25.2ms0%AS51790SIEL - SIEL, d.o.o., SI

tracepath -6

 1?: [LOCALHOST]                        0.020ms pmtu 1500
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  0.521ms 
 1:  xe-0-0-13-178.gw01.ber01.as59645.net                  0.828ms 
 2:  ae0-2453.cr10.ber01.lwlcom.net                       31.629ms 
 3:  ae0-40.cr10.muc02.lwlcom.net                         11.605ms 
 4:  ae0-10.cr10.muc01.lwlcom.net                         11.865ms 
 5:  2001:7f8:30:0:2:1:0:3212                             21.548ms asymm  7 
 6:  2a00:fc0:4314:c::a                                   30.070ms asymm  8 
 7:  2a00:fc0:4314:c::b                                   27.032ms asymm  9 
 8:  2a02:28b0:101:866::1                                 42.397ms 
 9:  dns1.siel.si                                         25.824ms reached
     Resume: pmtu 1500 hops 9 back 9

From DE host (Düsseldorf)   openRFC 4890 ✓

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

4/4
Echo small (56B) 19.6ms
4/4
Echo 1500B (DF) 19.6ms
yes
Type 1 dest-unreach
443,80
TCP responds on

Path (traceroute + mtr + PTR)

#IP / PTRRTTmtr lossASAS holder
1xe-0-0-12-142.gw01.dus01.as59645.net
2a06:d1c1:100:d::1		0.1ms0%*AS59645WYBT-NET - Tobias Fiebig, DE
2ipv6.decix-dusseldorf.core1.dus1.he.net
2001:7f8:9e::1b1b:0:1		6.2ms0%-NA
3100ge0-0-0-18.core4.fra1.he.net
2001:470:0:52e::1		13.2ms50%AS6939HURRICANE - Hurricane Electric LLC, US
4be8.core1.prg1.he.net
2001:470:e:1e::2		19.6ms10%AS6939HURRICANE - Hurricane Electric LLC, US
5*-30%-
6*-0%-
7six2.siel.si @SIX
2001:7f8:46:0:1:0:5:1790		21.1ms0%AS51988ARNES-SIX - ARNES, SI
82a02:28b0:101:866::129.7ms0%AS51790SIEL - SIEL, d.o.o., SI
9dns1.siel.si
2a02:28b0:53::53		19.5ms0%AS51790SIEL - SIEL, d.o.o., SI

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:  xe-0-0-12-142.gw01.dus01.as59645.net                  0.320ms 
 1:  xe-0-0-12-142.gw01.dus01.as59645.net                  0.285ms 
 2:  ipv6.decix-dusseldorf.core1.dus1.he.net               6.503ms asymm  3 
 3:  no reply
 4:  be8.core1.prg1.he.net                                12.284ms asymm  5 
 5:  no reply
 6:  e0-36.core1.lju1.he.net                              20.722ms asymm  5 
 7:  2001:470:435:1::2                                    19.747ms asymm  6 
 8:  2a02:28b0:101:866::1                                 22.906ms asymm  7 
 9:  2a02:28b0:101:866::1                                 25.086ms asymm  7 
10:  dns1.siel.si                                         19.678ms reached
     Resume: pmtu 1500 hops 10 back 8

From NL host (go6lab)   openRFC 4890 ✓

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

4/4
Echo small (56B) 73.5ms
4/4
Echo 1500B (DF) 27.0ms
yes
Type 1 dest-unreach
443,80
TCP responds on

Path (traceroute + mtr + PTR)

#IP / PTRRTTmtr lossASAS holder
12a00:8642:42::20.4ms0%AS203993GNA-DC1-AS - S.J.M. Steffann, NL
2*---
3speed-ix.he.net
2001:7f8:b7::a500:6939:1		7.6ms0%-NA
4be2.core4.fra1.he.net
2001:470:e:38::2		12.7ms20%AS6939HURRICANE - Hurricane Electric LLC, US
5be8.core1.prg1.he.net
2001:470:e:1e::2		18.5ms0%AS6939HURRICANE - Hurricane Electric LLC, US
6be3.core1.vie1.he.net
2001:470:e:a7::2		22.7ms40%AS6939HURRICANE - Hurricane Electric LLC, US
7e0-36.core1.lju1.he.net
2001:470:0:578::2		28.1ms0%AS6939HURRICANE - Hurricane Electric LLC, US
8six2.siel.si @SIX
2001:7f8:46:0:1:0:5:1790		24.7ms0%AS51988ARNES-SIX - ARNES, SI
92a02:28b0:101:866::136.4ms0%AS51790SIEL - SIEL, d.o.o., SI
102a02:28b0:101:866::132.0ms0%AS51790SIEL - SIEL, d.o.o., SI
11dns1.siel.si
2a02:28b0:53::53		23.7ms0%AS51790SIEL - SIEL, d.o.o., SI

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]                        0.053ms pmtu 1500
 1:  ???                                                 802.350ms 
 1:  ???                                                   5.537ms 
 2:  no reply
 3:  speed-ix.he.net                                       5.946ms 
 4:  be2.core4.fra1.he.net                                13.590ms 
 5:  be8.core1.prg1.he.net                                17.986ms 
 6:  be3.core1.vie1.he.net                                21.507ms 
 7:  e0-36.core1.lju1.he.net                              28.016ms 
 8:  six2.siel.si                                         25.120ms 
 9:  2a02:28b0:101:866::1                                 31.226ms 
10:  dns1.siel.si                                         26.662ms reached
     Resume: pmtu 1500 hops 10 back 10

From ITA host (Karsolink)   openRFC 4890 ✓

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

4/4
Echo small (56B) 19.8ms
4/4
Echo 1500B (DF) 19.9ms
yes
Type 1 dest-unreach
443,80
TCP responds on

Path (traceroute + mtr + PTR)

#IP / PTRRTTmtr lossASAS holder
1*---
2*---
32a12:d8c0:101f:6::19.7ms70%AS204471KARSOLINK - 2S Computers SRL, IT
4*---
5e0-35.core1.zag2.he.net
2001:470:0:6ea::2		19.0ms0%AS6939HURRICANE - Hurricane Electric LLC, US
6*---
7e0-35.core1.lju1.he.net
2001:470:0:577::2		21.0ms0%AS6939HURRICANE - Hurricane Electric LLC, US
82001:470:435:1::219.6ms0%AS6939HURRICANE - Hurricane Electric LLC, US
92a02:28b0:101:1299::120.5ms0%AS51790SIEL - SIEL, d.o.o., SI
102a02:28b0:101:866::122.5ms0%AS51790SIEL - SIEL, d.o.o., SI

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:d8c0:101f:103::1                                 8.696ms 
 4:  no reply
 5:  e0-35.core1.zag2.he.net                              18.702ms 
 6:  no reply
 7:  e0-35.core1.lju1.he.net                              22.459ms 
 8:  six2.siel.si                                         21.977ms 
 9:  2a02:28b0:101:866::1                                 23.916ms 
10:  2a02:28b0:101:866::1                                 33.857ms asymm  9 
11:  dns1.siel.si                                         19.968ms reached
     Resume: pmtu 1500 hops 11 back 10

From SLO host (6connect)   openRFC 4890 ✓

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

4/4
Echo small (56B) 1.2ms
4/4
Echo 1500B (DF) 1.2ms
yes
Type 1 dest-unreach
443,80
TCP responds on

Path (traceroute + mtr + PTR)

#IP / PTRRTTmtr lossASAS holder
1fw1-lju.6connect.com
2607:fae0:a000::2		0.3ms0%*AS80386CONNECT - 6connect, Inc., US
2*---
3*---
42001:7f8:46::5:1790 @SIX1.4ms0%AS51988ARNES-SIX - ARNES, SI
52a02:28b0:101:1699::11.6ms0%AS51790SIEL - SIEL, d.o.o., SI
62a02:28b0:101:866::14.6ms0%AS51790SIEL - SIEL, d.o.o., SI
7dns1.siel.si
2a02:28b0:53::53		1.7ms0%AS51790SIEL - SIEL, d.o.o., SI

tracepath -6

 1?: [LOCALHOST]                        0.015ms pmtu 9000
 1:  fw1-lju.6connect.com                                  0.704ms 
 1:  fw1-lju.6connect.com                                  0.458ms 
 2:  no reply
 3:  2a03:a100:0:201:1::1                                  1.577ms 
 4:  2a03:a100:0:201:1::1                                  1.065ms pmtu 1500
 4:  2001:7f8:46::5:1790                                   1.511ms asymm  6 
 5:  2a02:28b0:101:1699::1                                 1.626ms asymm  6 
 6:  2a02:28b0:101:866::1                                 50.428ms asymm  7 
 7:  dns1.siel.si                                          1.399ms reached
     Resume: pmtu 1500 hops 7 back 8

From SLO host (T-2)   openRFC 4890 ✓

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

4/4
Echo small (56B) 2.6ms
4/4
Echo 1500B (DF) 2.7ms
yes
Type 1 dest-unreach
443,80
TCP responds on

Path (traceroute + mtr + PTR)

#IP / PTRRTTmtr lossASAS holder
1*---
22a01:260:1::2251.8ms0%*AS34779T-2-AS - T-2, d.o.o., SI
32a01-260-1-1--9a.core6.t-2.net
2a01:260:1:1::9a		2.3ms0%*AS34779T-2-AS - T-2, d.o.o., SI
4six2.siel.si @SIX
2001:7f8:46:0:1:0:5:1790		2.7ms0%AS51988ARNES-SIX - ARNES, SI
52a02:28b0:101:1699::13.3ms0%AS51790SIEL - SIEL, d.o.o., SI
62a02:28b0:101:866::14.2ms0%AS51790SIEL - SIEL, d.o.o., SI
7dns1.siel.si
2a02:28b0:53::53		3.1ms0%AS51790SIEL - SIEL, d.o.o., SI

tracepath -6

 1?: [LOCALHOST]                        0.027ms pmtu 1500
 1:  no reply
 2:  2a01:260:1::225                                       4.829ms 
 3:  2a01-260-1-1--9a.core6.t-2.net                        3.459ms 
 4:  2001:7f8:46::5:1790                                   2.716ms asymm  5 
 5:  2a02:28b0:101:1299::1                                 3.376ms 
 6:  2a02:28b0:101:866::1                                  7.589ms 
 7:  dns1.siel.si                                          3.221ms reached
     Resume: pmtu 1500 hops 7 back 7