Named issues with T-Mobile 5G for Business

[Philip Prindeville]

> On Jan 6, 2026, at 12:58 PM, Philip Prindeville via bind-users <bind-users at lists.isc.org> wrote:
> 
> 
> 
>> On Jan 6, 2026, at 12:24 PM, Marco Moock <mm at dorfdsl.de> wrote:
>> 
>> On 06.01.2026 12:07 Philip Prindeville via bind-users
>> <bind-users at lists.isc.org> wrote:
>> 
>>> Can I use rndc to change the settings ("querylog" or "trace"?) to get
>>> more insight into what's going on?
>> 
>> I would first suggest to measure packet loss using mtr.
>> If there is any, this needs to be investigated further.
> 
> 
> mtr to where?  The root name servers?


Did one to ns-1707.awsdns-21.co.uk <http://ns-1707.awsdns-21.co.uk/>:


                             My traceroute  [v0.95]
OpenWrt2 (162.191.234.12) -> 205.251.198.171 (205.251.12026-01-06T13:00:04-0700
Keys:  Help   Display mode   Restart statistics   Order of fields   quit
                                       Packets               Pings
 Host                                Loss%   Snt   Last   Avg  Best  Wrst StDev
 1. (waiting for reply)
 2. 10.170.203.249                   64.9%    57   69.9 255.3  66.8 2003. 488.3
 3. 10.164.160.61                    82.1%    57   68.9 330.0  66.4 1930. 605.4
 4. ae2.er1.ord2.us.zip.zayo.com     64.9%    57   81.1 235.9  67.6 1857. 437.4
 5. (waiting for reply)
 6. ae20.cr1.ord8.us.zip.zayo.com    91.1%    56   91.9  78.5  64.7  91.9  12.1
 7. (waiting for reply)
 8. (waiting for reply)
 9. (waiting for reply)
10. (waiting for reply)
11. (waiting for reply)
12. ns-1707.awsdns-21.co.uk          66.1%    56   73.2 207.4  73.2 1275. 339.7