AT&T Fiber Line / NOT MIS

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. :frowning: Any options?

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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

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

Guess their broadband stuff☹

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Dennis Burgess

Author of "Learn RouterOS- Second Edition”

Link Technologies, Inc – Mikrotik & WISP Support Services

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

Create Wireless Coverage’s with www.towercoverage.com

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

Yeah not going to happen on U-verse

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.

Ya not wishing to do NAT…

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.

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.

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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

Create Wireless Coverage’s with www.towercoverage.com