[dns-operations] Missing g.root-servers.net and k.root-servers.net

[Peter Dambier]

Thank you Anand.

I am glad they are all back.

Yes I am connected to DTAG.de

Kind regards
Peter

Anand Buddhdev wrote:
> On 28/7/08 18:37, Peter Dambier wrote:
> 
> Hello Peter,
> 
>> at 2008-07-28 (210) 13:20:15 UTC I got an alarm:
>>
>> Root-Servers SOA records
>>
>> soa(".","2008072800","a.root-servers.net","198.41.0.4").
>> soa(".","2008072701","b.root-servers.net","192.228.79.201").
>> soa(".","2008072800","c.root-servers.net","192.33.4.12").
>> soa(".","2008072800","d.root-servers.net","128.8.10.90").
>> soa(".","2008072800","e.root-servers.net","192.203.230.10").
>> soa(".","2008072800","f.root-servers.net","192.5.5.241").
>> error(".","g.root-servers.net","192.112.36.4","no response").
>> soa(".","2008072800","h.root-servers.net","128.63.2.53").
>> soa(".","2008072800","i.root-servers.net","192.36.148.17").
>> soa(".","2008072800","j.root-servers.net","192.58.128.30").
>> error(".","k.root-servers.net","193.0.14.129","no response").
>> soa(".","2008072800","l.root-servers.net","199.7.83.42").
>> soa(".","2008072800","m.root-servers.net","202.12.27.33").
>>
>> Interestingly enough, a couple of hours later I get
>>
>> ; <<>> DiG 9.4.0 <<>> +norec @k.root-servers.net chaos txt id.server
>> ; (1 server found)
>> ;; global options:  printcmd
>> ;; Got answer:
>> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 54798
>> ;; flags: qr; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
>>
>> ;; QUESTION SECTION:
>> ;id.server.                     CH      TXT
>>
>> ;; ANSWER SECTION:
>> id.server.              0       CH      TXT     "k1.linx.k.ripe.net"
>>
>> ;; Query time: 83 msec
>> ;; SERVER: 193.0.14.129#53(193.0.14.129)
>> ;; WHEN: Mon Jul 28 18:11:21 2008
>> ;; MSG SIZE  rcvd: 58
>>
>> I expected "kserver.denic" for Frankfurt, but that is London.
> 
> You appear to be behind DTAG's network. DTAG peers with K-root at LINX,
> from where it receives 193.0.14.0/23, and at CIXP, where it receives
> 193.0.14.0/24 tagged with NO_EXPORT. Therefore, you as a customer of
> DTAG will only receive the /23 prefix, and not the /24.
> 
> I cannot say for sure what happened during the brief window when you
> experienced the outage to K-root. However, the most likely explanation
> is that DTAG briefly lost its peering at LINX, and therefore was unable
> to provide a path to K-root for its downstream customers.
> 
> What puzzles me is that DTAG only sees K-root's /23 prefix from LINX.
> I'm supposing that DTAG has transit arrangements with other networks,
> and it should see a few more paths to K-root's /23 prefix.
> 
> Regards,
> 
> Anand Buddhdev
> DNS Services Manager, RIPE NCC

-- 
Peter and Karin Dambier
Cesidian Root - Radice Cesidiana
Rimbacher Strasse 16
D-69509 Moerlenbach-Bonsweiher
+49(6209)795-816 (Telekom)
+49(6252)750-308 (VoIP: sipgate.de)
mail: peter at peter-dambier.de
http://www.peter-dambier.de/
http://iason.site.voila.fr/
https://sourceforge.net/projects/iason/