129.250.35.250/251 NTT DNS Instability

Mon Jan 12 16:30:39 UTC 2015

Traceroute from my home connection in Dubai, United Arab Emirates:

traceroute to 129.250.35.250 (129.250.35.250), 64 hops max, 52 byte packets
 1  192.168.1.1 (192.168.1.1)  2.293 ms  1.549 ms  7.657 ms
 2  94.203.22.1 (94.203.22.1)  3.281 ms  8.348 ms  8.494 ms
 3  10.39.162.65 (10.39.162.65)  5.722 ms  2.753 ms  4.999 ms
 4  10.171.0.19 (10.171.0.19)  2.780 ms  3.022 ms  3.278 ms
 5  10.100.35.78 (10.100.35.78)  6.344 ms  5.340 ms  5.254 ms
 6  10.44.24.162 (10.44.24.162)  90.120 ms  90.141 ms  92.448 ms
 7  116.51.26.81 (116.51.26.81)  276.227 ms  265.609 ms  368.385 ms
 8  ae-1.r21.sngpsi05.sg.bb.gin.ntt.net (129.250.7.20)  275.509 ms  270.857 ms  274.100 ms
 9  ae-4.r23.tokyjp01.jp.bb.gin.ntt.net (129.250.7.37)  258.667 ms  265.824 ms  256.990 ms
10  x.ns.gin.ntt.net (129.250.35.250)  251.302 ms  252.865 ms  255.337 ms

> On Jan 12, 2015, at 8:28 PM, A MEKKAOUI <amekkaoui at mektel.ca> wrote:
> 
> What we've seen is that this morning some of our clients cannot connect to
> internet and when we change the DNS to use Google DNS internet works fine.
> I'll see if I can get a tracert to 129.250.35.250 and will send it.
> 
> Thank you
> 
> A MEKKAOUI
> MEKTEL INC
> www.mektel.ca
> 
> 
> -----Original Message-----
> From: Jared Mauch [mailto:jared at puck.nether.net] 
> Sent: 12 janvier 2015 11:20
> To: A MEKKAOUI
> Cc: nanog at nanog.org
> Subject: Re: 129.250.35.250/251 NTT DNS Instability
> 
> Can you give examples?  129.250.35.250/251 are anycasted so a trace route
> would be helpful as well.
> 
> - jared
> 
>> On Jan 12, 2015, at 11:17 AM, A MEKKAOUI <amekkaoui at mektel.ca> wrote:
>> 
>> Hi
>> 
>> 
>> 
>> We've seen some DNS instability and want to know if anyone of you have 
>> seen the same thing. Your comments will be appreciated.
>> 
>> 
>> 
>> Thank you
>> 
>> 
>> 
>> Karim
>> 
>> 
> 
> 