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@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@puck.nether.net] Sent: 12 janvier 2015 11:20 To: A MEKKAOUI Cc: nanog@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@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