nanog mailing list archives

Re: Cellular backup connections


From: Aaron1 <aaron1 () gvtc com>
Date: Fri, 28 Dec 2018 13:28:36 -0600

On the topic of static ip... as a Net Eng of an ISP, and seeing the pains that we have to endure with our static ip 
customers , I wonder if static ip customers actually inadvertently get less optimal treatment than more flexible, agile 
and dynamic ip customers ?  

I’m saying that since over the years as I have migrated from one router to another, from one technology Ethernet/IP, 
mpls/ip, it’s more difficult to move those static customers subnets around, and sometimes easier just to leave them on 
an old router where they’ve been for years.

Aaron

On Dec 28, 2018, at 12:32 PM, Jared Geiger <jared () compuwizz net> wrote:

I found horrible routing with a static IP setup with T-Mobile. The device was located in Ashburn, outbound routing 
would go out via Dallas and inbound would come in via Seattle. So ping times and usability was rough. Tried it on the 
west coast and the same problem. T-Mobile support said this was by design and they couldn’t change it. 

I decided to switch to a regular consumer AT&T data sim without a static IP and set up a small router to initiate a 
VPN tunnel out to wherever I need it. It turns out to be cheaper and reliable for us. 

~Jared Geiger

On Fri, Dec 28, 2018 at 11:53 AM Ryan Wilkins <ryan () deadfrog net> wrote:
You mention your connection is 4G.  On T-Mobile 4G is UMTS whereas LTE is, well, LTE.  Are you really on UMTS (which 
I would expect to have much crazier RTTs and jitter like you report) or did you mean LTE?

Ryan

On Dec 28, 2018, at 7:06 AM, Dovid Bender <dovid () telecurve com> wrote:

Hi All,

I finally got around to setting up a cellular backup device in our new POP. I am currently testing with T-Mobile 
where the cell signal strength is at 80%. The connection is 4G. When SSH'ing in remotely the connection seems 
rather slow. Ping times seem to be all over the place (for instance now I am seeing: rtt min/avg/max/mdev = 
174.142/336.792/555.574/99.599 ms) . Is that just cellular or is that more related to the provider and the 
location where I am? I could in theory test with VZ and ATT as well. With Verizon they charge $500.00 just to get 
a public IP and I want to avoid that if possible.

Thanks and sorry in advance if this is off topic.




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