AS199883 ARUBACLOUDLTD-ASN Aruba S.p.A.

IPv6 prefix announced, but nothing inside is responding yet. AS199883 announces 1 IPv6 prefix(es) to the global routing table - that’s the part that BGP and our route-server scrape confirm. But our active discovery (curated hostnames, holder-derived domains, authoritative DNS NS/SOA/MX, certificate-transparency hostnames, RIPE Atlas, RDAP, IPv6 Hitlist) found no ICMPv6-responsive host inside the prefix on either vantage, and a yarrp pass against random addresses inside the prefix produced zero in-prefix hops (no router on the path through the AS replied with Time-Exceeded for any random target). That combination usually means the announcement is configured but the addresses inside aren’t in active use yet. The BGP route is there; the operational deployment is still ahead.

AS overview

Test target: 2a01:6e60::1 · (no live host found) · address space: PA · prefixes announced: 1

prefix(es): 2a01:6e60::/32

RPKI & ASPA

1 of 1 prefix(es) covered by a valid ROA.

Prefix	RPKI state	Reason	Covering VRP(s)
`2a01:6e60::/32`	✓ valid	matched VRP (correct origin, length within maxLength)	AS199883 /32 maxLen 48 (ripe)

ASPA: this AS has published an ASPA record listing 4 upstream provider(s) that are authorized to propagate routes from it: AS174, AS1299, AS3356, AS19905. Routes from this AS that arrive via any other upstream are considered ASPA-invalid by validators that enforce ASPA.

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

We probed 15 arbitrary IPv6 address(es) inside AS199883's announced prefix(es). No router inside the prefix responded. The deepest visible hop was 2001:978:2:20::22:2 at hop 23 - that router does not answer ICMPv6 Echo. This is not in AS199883'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 active test inconclusive: no Echo Reply to 1300-byte probe.
method: ICMPv6 Echo + forged PTB, tested 2026-05-25T12:30:15Z

Failure detail — what to grep in your logs

vantage	our source	your target	method	result	tested (UTC)
go6lab	`2a00:8642:42::75`	`2a01:6e60::1`	`icmp6-echo`	no_echo	2026-05-25T12:30:15Z
karsolink	`2a12:d8c0:105a:9001::a154`	`2a01:6e60::1`	`icmp6-echo`	no_echo	2026-05-25T12:35:01Z
odin	`2607:fae0:a000::42`	`2a01:6e60::1`	`icmp6-echo`	no_echo	2026-05-25T12:30:03Z

Attempt log (go6lab):

icmp6-echo → no_echo: no Echo Reply to 1300-byte probe
dns-tcp → no_tcp: connect failed: [Errno 113] No route to host
tls → no_tcp: TLS connect failed
http → no_tcp: tcp/80 not open

Attempt log (karsolink):

icmp6-echo → no_echo: no Echo Reply to 1300-byte probe
dns-tcp → no_tcp: connect failed: [Errno 113] No route to host
tls → no_tcp: TLS connect failed
http → no_tcp: tcp/80 not open

Attempt log (odin):

icmp6-echo → no_echo: no Echo Reply to 1300-byte probe
dns-tcp → no_tcp: connect failed: timed out
tls → no_tcp: TLS connect failed
http → no_tcp: tcp/80 not open

To match the corresponding ICMPv6 packet on your side (host firewall, AS edge, or transit tap), look for our PTBs around the timestamps above:

sudo tcpdump -i any -n -e 'icmp6 and ip6[40] = 2 and (src host 2607:fae0:a000::42 or src host 2a00:8642:42::75 or src host 2a12:d8c0:105a:9001::a154)'

If you see our PTBs arriving but the destination's TCP/Echo flow does not shrink, the drop is in the destination kernel (cause 3 below). If you don't see them at all, drop is upstream of you (cause 2). If you only see them from one of our two source IPs, the drop is path-asymmetric — one transit on the asymmetric route is filtering, the other is not.

From NL host (go6lab) transit only unreachable

filter likely at: past AS174 (COGENT-174) · min PMTU on path: 1500

0/4

Echo small (56B) -

0/4

Echo 1500B (DF) -

Type 1 dest-unreach

TCP responds on

Path (traceroute + mtr + PTR)

#	IP / PTR	RTT	mtr loss	AS	AS holder
1	2a00:8642:42::3	1.2ms	0%	AS203993	STEFFANN-DC-AS - S.J.M. Steffann, NL
2	*	-	0%*	-
3	2a00:1ca8:1::194	2.5ms	10%	AS50673	Serverius-as - Serverius Holding B.V., NL
4	2a03:3f40::10:41	4.3ms	0%	AS50673	Serverius-as - Serverius Holding B.V., NL
5	*	-	20%	-
6	*	-	-	-
7	be9036.ccr82.lon05.atlas.cogentco.com 2001:550:0:1000::9a36:48b9	11.4ms	20%	AS174	COGENT-174 - Cogent Communications, LLC, US
8	port-channel3464.ccr91.lhr01.atlas.cogentco.com 2001:550:0:1000::9a36:4b96	12.5ms	0%	AS174	COGENT-174 - Cogent Communications, LLC, US
9	*	-	-	-
10	2001:978:2:20::22:2	12.0ms	0%	AS174	COGENT-174 - Cogent Communications, LLC, US
11	2001:978:2:20::22:2	11.9ms	10%	AS174	COGENT-174 - Cogent Communications, LLC, US

Rate-limited ICMPv6: hop 3, hop 5, hop 7, hop 11 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.050ms pmtu 1500
 1:  2a00:8642:42::3                                       1.371ms 
 1:  2a00:8642:42::3                                       1.339ms 
 2:  no reply
 3:  2a00:1ca8:1::194                                      3.212ms 
 4:  2a03:3f40::10:41                                      2.504ms 
 5:  2001:978:2:40::3:1                                    4.208ms 
 6:  no reply
 7:  be3530.ccr81.lon05.atlas.cogentco.com                13.680ms 
 8:  port-channel8444.ccr92.lhr01.atlas.cogentco.com      11.759ms 
 9:  no reply
10:  2001:978:2:20::22:2                                  14.892ms asymm  9 
11:  2001:978:2:20::22:2                                  15.156ms !H
     Resume: pmtu 1500

From ITA host (Karsolink) transit only unreachable

filter likely at: past AS174 (COGENT-174) · min PMTU on path: 1500

0/4

Echo small (56B) -

0/4

Echo 1500B (DF) -

Type 1 dest-unreach

TCP responds on

Path (traceroute + mtr + PTR)

#	IP / PTR	RTT	mtr loss	AS	AS holder
1	*	-	0%*	-
2	*	-	0%*	-
3	2a12:d8c0:101f:6::1	10.0ms	20%	AS204471	KARSOLINK - 2S Computers SRL, IT
4	2a03:b020:1:51::a	10.1ms	0%	AS41327	FIBERTELECOM-AS - Fiber Telecom S.p.A., IT
5	2a03:b020::246	10.0ms	0%	AS41327	FIBERTELECOM-AS - Fiber Telecom S.p.A., IT
6	2001:978:2:2a::e7:1	11.2ms	0%	AS174	COGENT-174 - Cogent Communications, LLC, US
7	be4918.agr62.mil02.atlas.cogentco.com 2001:550:0:1000::9a19:8c9	10.7ms	0%	AS174	COGENT-174 - Cogent Communications, LLC, US
8	port-channel3336.ccr92.mil02.atlas.cogentco.com 2001:550:0:1000::9a36:4d39	10.2ms	0%	AS174	COGENT-174 - Cogent Communications, LLC, US
9	*	-	60%	-
10	*	-	-	-
11	port-channel8670.ccr91.lhr01.atlas.cogentco.com 2001:550:0:1000::9a36:4b2a	35.9ms	0%	AS174	COGENT-174 - Cogent Communications, LLC, US
12	be8466.agr21.lhr01.atlas.cogentco.com 2001:550:0:1000::8275:195	38.3ms	80%	AS174	COGENT-174 - Cogent Communications, LLC, US
13	2001:978:2:20::22:2	193.7ms	0%	AS174	COGENT-174 - Cogent Communications, LLC, US
14	2001:978:2:20::22:2	193.4ms	0%	AS174	COGENT-174 - Cogent Communications, LLC, US

Rate-limited ICMPv6: hop 3, hop 9, hop 12 (loss between 5% and 95% across mtr cycles - the router replies but only sometimes).

tracepath -6

 1?: [LOCALHOST]                        0.029ms pmtu 1500
 1:  karsolink-01.net.karsolink.com                        0.738ms 
 1:  karsolink-01.net.karsolink.com                        0.725ms 
 2:  2a12:d8c0:109f:121::a1                                1.064ms 
 3:  2a12:d8c0:101f:6::1                                  10.521ms 
 4:  2a03:b020:1:51::a                                    10.804ms 
 5:  2a03:b020::246                                       11.426ms asymm  6 
 6:  2001:978:2:2a::e7:1                                  11.564ms asymm  7 
 7:  be4918.agr62.mil02.atlas.cogentco.com                11.344ms asymm  8 
 8:  port-channel4690.ccr92.mil02.atlas.cogentco.com      10.750ms asymm  9 
 9:  no reply
10:  no reply
11:  port-channel2732.ccr92.lhr01.atlas.cogentco.com      36.255ms asymm 12 
12:  be8466.agr21.lhr01.atlas.cogentco.com                38.293ms asymm 13 
13:  2001:978:2:20::22:2                                  33.289ms asymm  8 
14:  2001:978:2:20::22:2                                  33.952ms !H
     Resume: pmtu 1500

From SLO host (6connect) transit only unreachable

filter likely at: past AS3356 (LEVEL3) · min PMTU on path: 1500

0/4

Echo small (56B) -

0/4

Echo 1500B (DF) -

Type 1 dest-unreach

TCP responds on

Path (traceroute + mtr + PTR)

#	IP / PTR	RTT	mtr loss	AS	AS holder
1	fw1-lju.6connect.com 2607:fae0:a000::2	0.3ms	0%*	AS8038	6CONNECT - 6connect, Inc., US
2	*	-	0%*	-
3	2a00:ee1:800:9::1	1.8ms	0%	AS5603	SIOL-NET - Telekom Slovenije, d.d., SI
4	2a00:ee0:1:15::2	1.2ms	0%	AS5603	SIOL-NET - Telekom Slovenije, d.d., SI
5	2001:1900:5:2:2:0:11c:d49	7.2ms	0%	AS3356	LEVEL3 - Level 3 Parent, LLC, US
6	*	-	0%	-
7	2001:1900:5:2:2::3c02	35.2ms	0%	AS3356	LEVEL3 - Level 3 Parent, LLC, US
8	*	-	-	-
9	*	-	-	-
10	*	-	-	-
11	*	-	-	-
12	*	-	-	-
13	*	-	-	-
14	*	-	-	-
15	*	-	-	-
16	*	-	-	-
17	*	-	-	-
18	*	-	-	-
19	*	-	-	-
20	*	-	-	-
21	*	-	-	-
22	*	-	-	-
23	*	-	-	-
24	*	-	-	-

tracepath -6

 1?: [LOCALHOST]                        0.044ms pmtu 1500
 1:  fw1-lju.6connect.com                                  0.627ms 
 1:  fw1-lju.6connect.com                                  0.507ms 
 2:  no reply
 3:  2a00:ee1:800:9::1                                     2.548ms 
 4:  2a00:ee0:1:15::2                                      1.342ms asymm  3 
 5:  2001:1900:5:2:2:0:11c:d49                             7.349ms asymm  7 
 6:  no reply
 7:  2001:1900:5:2:2::3c02                                32.963ms asymm 13 
 8:  no reply
 9:  no reply
10:  no reply
11:  no reply
12:  no reply
13:  no reply
14:  no reply
15:  no reply
16:  no reply
17:  no reply
18:  no reply
19:  no reply
20:  no reply
21:  no reply
22:  no reply
23:  no reply
24:  no reply
     Too many hops: pmtu 1500
     Resume: pmtu 1500