Last Mile Design

Mikael Abrahamsson swmike at
Thu Feb 14 20:57:46 UTC 2019

On Thu, 14 Feb 2019, Aaron Gould wrote:

> Not sure if this is what y'all are talking about, but I use lots of Juniper ACX5048 (previously Cisco ME3600 or ASR9000) for mpls-capable router edging in native ip/ethernet from ftth gpon network into mpls l2circuits and LOTS of vrf.... vrf for public ip, vrf for cgnat for private ip, vrf for voice...  I'm glad I did it.
> Residential----- ONT-----ftth/gpon------OLT------ACX5048-----mpls/vrf x-------cgnat/inet------
> Residential----- DSL Modem-----DSLAM-----------ACX5048-----mpls/vrf y-------cgnat/inet------
> Residential----- Cable Modem-----CMTS-----------ACX5048-----mpls/vrf z-------cgnat/inet------

Residential----fiber media converter---L2 switch-- and then the rest of 
the setup you can re-use. AE isn't magic, insted of having an OLT,CMTS or 
DSLAM you just have an L2 ethernet switch.

They're mostly just media converters anyway. 15 years ago I deployed ADSL 
like this:

Residential---DSL modem---DSLAM----L3 switch

So DSL-modem---DSLAM was just doing RFC1843bridged over ATM. Just media 
converters. Same thing, just different type of media converter.

Mikael Abrahamsson    email: swmike at

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