It appears that 2600:: no longer responds to ICMP. $ mtr -rwc 1 2600:: Start: 2024-04-06T10:53:41+0100 HOST: metropolis Loss% 1.|-- lcy02.flat.b621.net 0.0% [...] 6.|-- ldn-b4-link.ip.twelve99.net 0.0% 7.|-- ldn-bb1-v6.ip.twelve99.net 0.0% 8.|-- nyk-bb2-v6.ip.twelve99.net 0.0% 9.|-- ??? 100.0 10.|-- sprint-ic301620-nyk-b5.ip.twelve99-cust.net 0.0% 11.|-- ??? 100.0 This seems to have happened around Friday 5th 13:40 UTC. 2600::, a IP address owned by the Sprint network (Now since acquired by Cogent Communications) is a common (at least in my circles) IPv6 testing address, in a similar way that 8.8.8.8 or 1.1.1.1 is for a quick address to remember that always pings, when such a address is so easy to remember, you sometimes cannot help it becoming a "core project" :) ( https://xkcd.com/1361/ ) 2600:: is also used to be the address of sprint.net, now sprint.net has no v6. This is sad, and I would either propose that Cogent/Sprint (I assume 2600:: is under the ownership of Cogent now) revive this address as it's a very helpful testing address that is burned into the minds of many. Or at the very least, I'm more than willing to tank the effort of responding to ICMP!
I don't know what happed to 2600::, but 2a09:: and 2a11:: can be used as alternatives. These are addresses of https://dns.sb/ running by xTom.
-----Original Message----- From: NANOG <nanog-bounces+soha=lohu.info@nanog.org> On Behalf Of Ben Cartwright-Cox via NANOG Sent: Saturday, April 6, 2024 6:01 PM To: North American Network Operators' Group <nanog@nanog.org> Subject: 2600:: No longer pings
It appears that 2600:: no longer responds to ICMP.
$ mtr -rwc 1 2600:: Start: 2024-04-06T10:53:41+0100 HOST: metropolis Loss% 1.|-- lcy02.flat.b621.net 0.0% [...] 6.|-- ldn-b4-link.ip.twelve99.net 0.0% 7.|-- ldn-bb1-v6.ip.twelve99.net 0.0% 8.|-- nyk-bb2-v6.ip.twelve99.net 0.0% 9.|-- ??? 100.0 10.|-- sprint-ic301620-nyk-b5.ip.twelve99-cust.net 0.0% 11.|-- ??? 100.0
This seems to have happened around Friday 5th 13:40 UTC.
2600::, a IP address owned by the Sprint network (Now since acquired by Cogent Communications) is a common (at least in my circles) IPv6 testing address, in a similar way that 8.8.8.8 or 1.1.1.1 is for a quick address to remember that always pings, when such a address is so easy to remember, you sometimes cannot help it becoming a "core project" :) ( https://xkcd.com/1361/ )
2600:: is also used to be the address of sprint.net, now sprint.net has no v6.
This is sad, and I would either propose that Cogent/Sprint (I assume 2600:: is under the ownership of Cogent now) revive this address as it's a very helpful testing address that is burned into the minds of many. Or at the very least, I'm more than willing to tank the effort of responding to ICMP!
On Sat, Apr 06, 2024 at 06:19:57PM +0800, Soha Jin <soha@jin.sh> wrote a message of 50 lines which said:
I don't know what happed to 2600::, but 2a09:: and 2a11:: can be used as alternatives. These are addresses of https://dns.sb/ running by xTom.
Very good DNS service, buy the way. But, although I undertsand the point of having test IPv6 addresses which are easy to remember, this is an opportunity to remind everybody that the pingability of these addresses is not guaranteed. Better to use machines which are intended for testing such as the RIPE Atlas anchors <https://atlas.ripe.net/anchors/about/>.
2409:: is replying the ICMPv6 request, in case anyone interested
On 6 Apr 2024, at 15:31, nanog@nanog.org wrote:
It appears that 2600:: no longer responds to ICMP.
$ mtr -rwc 1 2600:: Start: 2024-04-06T10:53:41+0100 HOST: metropolis Loss% 1.|-- lcy02.flat.b621.net 0.0% [...] 6.|-- ldn-b4-link.ip.twelve99.net 0.0% 7.|-- ldn-bb1-v6.ip.twelve99.net 0.0% 8.|-- nyk-bb2-v6.ip.twelve99.net 0.0% 9.|-- ??? 100.0 10.|-- sprint-ic301620-nyk-b5.ip.twelve99-cust.net 0.0% 11.|-- ??? 100.0
This seems to have happened around Friday 5th 13:40 UTC.
2600::, a IP address owned by the Sprint network (Now since acquired by Cogent Communications) is a common (at least in my circles) IPv6 testing address, in a similar way that 8.8.8.8 or 1.1.1.1 is for a quick address to remember that always pings, when such a address is so easy to remember, you sometimes cannot help it becoming a "core project" :) ( https://xkcd.com/1361/ )
2600:: is also used to be the address of sprint.net, now sprint.net has no v6.
This is sad, and I would either propose that Cogent/Sprint (I assume 2600:: is under the ownership of Cogent now) revive this address as it's a very helpful testing address that is burned into the minds of many. Or at the very least, I'm more than willing to tank the effort of responding to ICMP!
On Sun, Apr 07, 2024 at 09:33:18AM +0530, Gaurav Kansal via NANOG <nanog@nanog.org> wrote a message of 41 lines which said:
2409:: is replying the ICMPv6 request, in case anyone interested
Thank, I did not know this service. Note that the signatures on the reverse expired in february: % dig +cd -x 2409:: ; <<>> DiG 9.18.18-0ubuntu0.22.04.2-Ubuntu <<>> +cd -x 2409:: ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 61252 ;; flags: qr rd ra cd; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags: do; udp: 1232 ;; QUESTION SECTION: ;0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.9.0.4.2.ip6.arpa. IN PTR ;; ANSWER SECTION: 0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.9.0.4.2.ip6.arpa. 360 IN PTR dns.nic.in. 0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.9.0.4.2.ip6.arpa. 360 IN RRSIG PTR 10 34 360 ( 20240229030654 20240130030654 43700 0.0.0.9.0.4.2.ip6.arpa. Rga+5mz8UC4nOqWHT4B13aaAC2Oenyp+R3YvklfmfQvC giyr3I/qbCFZiPqKKdksFIH0LtaP8AOM1h03mvJFaAqD sDceS3WRlObCkbpDphzW8ccqzGSGF/MXHiBk1LucBtZU ZEv5YpYTb3j1HhbL4Jj135slTHJ2aMOjWOlAK8rpx1b2 KYWQdZEVK2gE5RbS1m4mhBP4FZsRRMsv7dWdZgcH4zAs g+vYUvE9x2tjSCul8i/LrzsC3BOU8la02qFarIj35TGV 0XYVoryBSuiDmdtpQPkIXB5Ef0XZK51kRqZGveGdkxnV S1zQ09bDv7fiuHVvRFUvUdsVOs/xveLM9Q== ) ;; Query time: 312 msec ;; SERVER: 192.168.2.254#53(192.168.2.254) (UDP) ;; WHEN: Sun Apr 07 10:42:02 CEST 2024 ;; MSG SIZE rcvd: 435
I'd be just as gutted if they ever pull the plug on ipv6.google.com <http://ipv6.google.com/> - it's my go-to "first attempt" for an IPv6 test. :-) But this got me curious, so I grabbed a list of prefixes from [1] and decided to ping them all. Since I went through all that effort, might as well share the findings: $ for i in `cat list.txt`; do fping -6 $i -t 500 -r 0; done | grep 'is alive' 2409:: is alive 2a09:: is alive 2a11:: is alive 2a12:: is alive [<- 2a14:7:ffff::2]2a14:: is alive [1] https://www.iana.org/assignments/ipv6-unicast-address-assignments/ipv6-unica... Tomas
6. 4. 2024 v 12:00, Ben Cartwright-Cox via NANOG <nanog@nanog.org>:
It appears that 2600:: no longer responds to ICMP.
$ mtr -rwc 1 2600:: Start: 2024-04-06T10:53:41+0100 HOST: metropolis Loss% 1.|-- lcy02.flat.b621.net 0.0% [...] 6.|-- ldn-b4-link.ip.twelve99.net 0.0% 7.|-- ldn-bb1-v6.ip.twelve99.net 0.0% 8.|-- nyk-bb2-v6.ip.twelve99.net 0.0% 9.|-- ??? 100.0 10.|-- sprint-ic301620-nyk-b5.ip.twelve99-cust.net 0.0% 11.|-- ??? 100.0
This seems to have happened around Friday 5th 13:40 UTC.
2600::, a IP address owned by the Sprint network (Now since acquired by Cogent Communications) is a common (at least in my circles) IPv6 testing address, in a similar way that 8.8.8.8 or 1.1.1.1 is for a quick address to remember that always pings, when such a address is so easy to remember, you sometimes cannot help it becoming a "core project" :) ( https://xkcd.com/1361/ )
2600:: is also used to be the address of sprint.net, now sprint.net has no v6.
This is sad, and I would either propose that Cogent/Sprint (I assume 2600:: is under the ownership of Cogent now) revive this address as it's a very helpful testing address that is burned into the minds of many. Or at the very least, I'm more than willing to tank the effort of responding to ICMP!
On Sun, Apr 07, 2024 at 01:12:21PM +0200, Tomáš Holý <holy@interconnect.cz> wrote a message of 227 lines which said:
$ for i in `cat list.txt`; do fping -6 $i -t 500 -r 0; done | grep 'is alive' 2409:: is alive 2a09:: is alive 2a11:: is alive 2a12:: is alive
All of them are public DNS resolvers, which make sense: having a simple IP address is a big marketing plus for a DNS resolver.
Wonderful news, this has now been fixed :) Thank you to Cogent for fixing this On Sat, 6 Apr 2024 at 11:00, Ben Cartwright-Cox <ben@benjojo.co.uk> wrote:
It appears that 2600:: no longer responds to ICMP.
$ mtr -rwc 1 2600:: Start: 2024-04-06T10:53:41+0100 HOST: metropolis Loss% 1.|-- lcy02.flat.b621.net 0.0% [...] 6.|-- ldn-b4-link.ip.twelve99.net 0.0% 7.|-- ldn-bb1-v6.ip.twelve99.net 0.0% 8.|-- nyk-bb2-v6.ip.twelve99.net 0.0% 9.|-- ??? 100.0 10.|-- sprint-ic301620-nyk-b5.ip.twelve99-cust.net 0.0% 11.|-- ??? 100.0
This seems to have happened around Friday 5th 13:40 UTC.
2600::, a IP address owned by the Sprint network (Now since acquired by Cogent Communications) is a common (at least in my circles) IPv6 testing address, in a similar way that 8.8.8.8 or 1.1.1.1 is for a quick address to remember that always pings, when such a address is so easy to remember, you sometimes cannot help it becoming a "core project" :) ( https://xkcd.com/1361/ )
2600:: is also used to be the address of sprint.net, now sprint.net has no v6.
This is sad, and I would either propose that Cogent/Sprint (I assume 2600:: is under the ownership of Cogent now) revive this address as it's a very helpful testing address that is burned into the minds of many. Or at the very least, I'm more than willing to tank the effort of responding to ICMP!
Wonderful news, this has now been fixed :) Thank you to Cogent for fixing this
indee. otoh, i still can not resist https://www.kame.net/ randy
participants (6)
-
Ben Cartwright-Cox -
Gaurav Kansal -
Randy Bush -
Soha Jin -
Stephane Bortzmeyer -
Tomáš Holý