FTTH ONTs and routers
frnkblk at iname.com
Sat May 17 15:17:56 UTC 2014
FYI, Calix has GPON support for the 836GE ONT on the E7 today, and it will
be supported in GPON mode in Release 9.0 on the C7.
From: NANOG [mailto:nanog-bounces at nanog.org] On Behalf Of Pete at TCC
Sent: Friday, May 16, 2014 11:15 AM
To: Jean-Francois Mezei; nanog at nanog.org
Subject: Re: FTTH ONTs and routers
There are many ONTs out there with various abilities. I can only
comment on what I deploy, and what various telcos deploy that I am
A few years ago, all of our AE and GPON ONTs were deployed as bridges.
Port 1 was generally an Internet VLAN, and port 2,3,4 were IPTV VLANs.
We have been using Occam (now Calix), but are considering other options
at this point. Currently we bridge all services on GPON deployments,
but rent routers for the Internet service if customers do not wish to
provide their own.
The 700-series ONTs are able to bounce between GPON and AE deployments
with a firmware change, so they are very flexible. Calix has apparently
released RG code (Residential Gateway, basic home router functionality)
for for the 700s, but we don't use that code.
We also deploy 836 ONTs, which had RG code built-in on release, and also
WiFi. The 836s currently only do AE, but were originally supposed to
do GPON/AE similar to the 700-series.
Today, the standard AE deployment is an 836 with RG code enabled for
WiFi and Port 1. WAN is DHCP, authorized with Option 82/RADIUS for
bandwidth profiles. LAN does NAT, and hands out a 192.168.88.0/24 subnet
to break as few consumer routers as possible. We have no problem
enabling bridging for Port 1 if the customer requests it. We bridge
Port 2,3,4 for IPTV because the RG functionality breaks certain
features, namely call display on the TVs. The 836s can do Static,
PPPoE, or DHCP on the WAN side.
We use MGCP for voice.
On 14-05-15 01:11 PM, Jean-Francois Mezei wrote:
> It had been my impression that ONTs, like most other consumer modems,
> came with built-in router capabilities (along with ATA for voice).
> The assertion that ONTs have built-in routing capabilities has been
> Can anyone confirm whether ONTs generally have routing (aka: home router
> that does the PPPoE or DHCP and then NAT for home) capabilities?
> Are there examples where a telco has deployed ONTs with the router
> built-in and enabled ? Or would almost all FTTH deployments be made with
> any routing disabled and the ONT acting as a pure ethernet bridge ?
> (I appreciate your help on this as I am time constrained to do research).
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