RE: AT&T Fiber Line / NOT MIS

[Dennis Burgess <dmburgess () linktechs net>]

Called Cascaded Router configuration on The POS router they gave .. their support and their support “Supervisor” could 
not make it work.  I just did .. FUN.


[LTI-Full_175px]
Dennis Burgess, Mikrotik Certified Trainer
MTCNA, MTCRE, MTCWE, MTCTCE, MTCINE, MTCSE, HE IPv6 Sage, Cambium ePMP Certified
Author of "Learn RouterOS- Second Edition”
Link Technologies, Inc -- Mikrotik & WISP Support Services
Office: 314-735-0270  Website: http://www.linktechs.net<http://www.linktechs.net/>
Create Wireless Coverage’s with www.towercoverage.com

From: Alex Conner <hello () codatory com>
Sent: Thursday, June 10, 2021 2:01 PM
To: Dennis Burgess <dmburgess () linktechs net>
Cc: TJ Trout <tj () pcguys us>; nanog () nanog org
Subject: Re: AT&T Fiber Line / NOT MIS

Yep; but even IP Passthrough, routed subnet, etc. all count as NAT sessions against the internal NAT table.

BTW, that's the feature you're looking for - routed subnet. That will pass your /26 to another network device over an 
RFC1918 subnet. The steps depend on what particular gateway hardware they have, but a quick Google of the gateway model 
and "routed subnet" should get you to the right spot. Assuming of course the other service limitations aren't a 
dealbreaker.

On Thu, Jun 10, 2021 at 2:54 PM Dennis Burgess <dmburgess () linktechs net<mailto:dmburgess () linktechs net>> wrote:
Ya not wishing to do NAT...
Sent from mobile device..

________________________________
From: Alex Conner <hello () codatory com<mailto:hello () codatory com>>
Sent: Thursday, June 10, 2021 1:49:27 PM
To: TJ Trout <tj () pcguys us<mailto:tj () pcguys us>>
Cc: Dennis Burgess <dmburgess () linktechs net<mailto:dmburgess () linktechs net>>; nanog () nanog org<mailto:nanog () 
nanog org> <nanog () nanog org<mailto:nanog () nanog org>>
Subject: Re: AT&T Fiber Line / NOT MIS

Bonus points, the small business fiber has extremely limited NAT session limits (depends on hardware, but not greater 
than 16,000 sessions) and everything counts. Cold loading CNN.com (an AT&T company) in a default config without an 
adblocker will use close to 3000, which will saturate and cause errors on some of their gateway hardware (NVG595). If 
you want to use it for any serious purpose, stick a tunnel out to a real connection.

On Thu, Jun 10, 2021 at 2:43 PM TJ Trout <tj () pcguys us<mailto:tj () pcguys us>> wrote:
Yeah not going to happen on U-verse

On Thu, Jun 10, 2021 at 11:32 AM Dennis Burgess <dmburgess () linktechs net<mailto:dmburgess () linktechs net>> wrote:

Guess their broadband stuff☹





Dennis Burgess

Author of "Learn RouterOS- Second Edition”

Link Technologies, Inc -- Mikrotik & WISP Support Services

Office: 314-735-0270  Website: http://www.linktechs.net<http://www.linktechs.net/>

Create Wireless Coverage’s with www.towercoverage.com<http://www.towercoverage.com>

Need MikroTik Cloud Management: https://cloud.linktechs.net



From: TJ Trout <tj () pcguys us<mailto:tj () pcguys us>>
Sent: Thursday, June 10, 2021 1:12 PM
To: Dennis Burgess <dmburgess () linktechs net<mailto:dmburgess () linktechs net>>
Cc: nanog () nanog org<mailto:nanog () nanog org>
Subject: Re: AT&T Fiber Line / NOT MIS



call back, i dont think that's accurate. What is the specific product?



On Thu, Jun 10, 2021 at 7:25 AM Dennis Burgess <dmburgess () linktechs net<mailto:dmburgess () linktechs net>> wrote:

I have a ATT fiber line for a customer that has a 300/300 circuit, but its not a MIS they are telling me we cannot 
route a /26 (they have allocated) to my device behind it.  ☹  Any options?





Dennis Burgess

Mikrotik : Trainer, Network Associate, Routing Engineer, Wireless Engineer, Traffic Control Engineer, Inter-Networking 
Engineer, Security Engineer, Enterprise Wireless Engineer

Hurricane Electric: IPv6 Sage Level

Cambium: ePMP



Author of "Learn RouterOS- Second Edition”

Link Technologies, Inc -- Mikrotik & WISP Support Services

Office: 314-735-0270  Website: http://www.linktechs.net<http://www.linktechs.net/>

Create Wireless Coverage’s with www.towercoverage.com<http://www.towercoverage.com>

Need MikroTik Cloud Management: https://cloud.linktechs.net

How did we do today?