Alternate architecture for BGW210-50mps/BGW320-1gps installations with local LAN using static IPs.

Internet access discussion, including Fusion, IP Broadband, and Gigabit Fiber!
6 posts Page 1 of 1
by emberson » Thu Nov 04, 2021 4:28 pm
This is a question. If I am incorrect, please let me know. Thanks.

Both the BGW210 and BGW320 wifi have 4x4 2.4GHz and 4x4 5GHz.
One 5GHz connection can support a speed more than 1gps, so the WIFI
is not a bottle neck compared to the ATT line out of one's house.

You have an existing internal home network with servers and desktops along
with a bunch of laptops (the laptops are sometimes used with WIFI and sometimes
with a wire connection).

I've seen a number of suggestions to place the BGW210/BGW320 in pass-through
mode and with a router on the LAN connected its WAN port to a BGWxxx
Ethernet port.

The alternate architecture I am suggesting is to have on the LAN a
router in bridge mode setup so that it communicates with the BGWxxx WIFI.
Physically, the bridging router can be near the BGWxxx broadcast gateway.
With this architecture, there is no cabling between one's home LAN and the
BGWxxx and the BGWxxx do not have to be in pass-through mode.

With this approach, the Sonic ATA box could still be connected directly
to the BGWxxx.
And, if one wishes, one could still directly connect machine(s) to the
BGWxxx Ethernet ports (though, the machine(s) could not communicate
with your other machine(s) no so connected to the BGWxxx (I assume)).

Would this work?

Thanks.
by charles2 » Fri Nov 05, 2021 4:36 pm
Small correction on the Arris spec:

2.4GHz support, 3x3 integrated omni-directional antenna with diversity
5GHz support, 4x4
--from BGW210-700 Broadband Gateway Release 1.0 Install and Operations Guide at
https://fccid.io/PGRBGW210/Users-Manual ... 205200.pdf

However, I have my doubts about how well the Arris wi-fi was implemented. When I put a TP-Link Archer A8, which is specified as 3×3 MU-MIMO beam-forming, as an access point, located in the spot where our Arris BGW210 was, and connected to the Arris by Ethernet cable, the wi-fi connection to devices around the house improved noticeably. This is with the Arris radios turned off.
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by ngufra » Sat Nov 06, 2021 6:43 am
What are you trying to achieve?
Why are you using another router? Do you want a better wifi or with the antenna in a different location?
I use another router because I want to control it and want more services; wifi is done by separate access points that do just that.

So in your new architecture which device is doing what? Dhcp firewall wifi etc?
by emberson » Sat Nov 06, 2021 8:39 am
charles2, thank you.
I was less precise than I should have been.

The BGW210-700:
Concurrent Wi-Fi
- 802.11 b/g/n and 802.11.ac 400 mW High-power radio
Wi-Fi Characteristics
- 2.4GHz support, 3x3 integrated omni-directional antenna with diversity
- 5GHz support, 4x4

The BGW320-500:
Tri-Band Wi-Fi
- 802.11 b/g/n/ac and 802.11.ax
Wi-Fi Characteristics
- 802.11.ax 2.4GHz support, 4x4
- 802.11.ax 5GHz support, 4x4 for both Low and High Band

While I am currently in the process of upgrading to Fiber-to-node at 50mps,
in a month or two I will be upgrading further to Fiber-to-the-Home at 1gps.
So, ultimately for me, there are two issues:
1) Will this proposed architecture work and
2) Will it work well (meaning, in this case, that the BGW320's 5GHz
WiFi not be the limiting speed factor, but, rather, the 1gps line
from home to external ATT connection will be the speed limit).

There are a couple of benefits to this approach:
1) With this approach, with the 2nd, inner router, in bridging mode,
there is no "double NAT", "double DNS", etc.
2) No reconfiguring, altering settings, etc. in the BGW are required.
3) The Sonic provided ATA simply plugs into the BGW.

BTW, none of my servers, desktops or laptops use DHCP.
by charles2 » Sat Nov 06, 2021 9:08 am
emberson wrote:,,,
2) Will it work well (meaning, in this case, that the BGW320's 5GHz WiFi not be the limiting speed factor, but, rather, the 1gps line from home to external ATT connection will be the speed limit).
Fiber at 1 gigabit per second moves that many bits per second (a theoretical physical speed, before reductions because of handshaking overhead, etc.)

5 GHz wi-fi operates on a 5 gigacycles per second radio band. It does not move anywhere near that many bits per second. My current wi-fi moves from 35 megabits per second up to several hundred megabits per second. It varies a lot because wi-fi is affected by how many devices are communicating at the moment, how capable each device is (somewhat similar to router architectures), distance to the device, metal objects in the signal path, interference from neighbors' wi-fi that must be sorted out, and maybe atmospheric conditions. Fortunately, the several devices we have on wi-fi do their job at these bit speeds.

If you want sustained gigabit speed to a device, something like Ethernet, not wi-fi, is necessary.
by js9erfan » Sat Nov 06, 2021 4:24 pm
If you want to extend the BGW210/320 wifi coverage consider using these to create a mesh (compatible w/ both BGW210/320): https://www.att.com/support/article/u-v ... /KM1192919

Instead of a second router in bridge mode (not totally clear on your goal) you might consider a switch for your wired devices that's connected to the BGW210/320 (assuming it provides the routing and DNS for your LAN).

You mentioned client isolation - I don't know if those ATT gateways support vlans but that's the better way to go for client isolation (or separate interfaces). Vlans also require a vlan capable switch.

As charles2 mentioned the best way to saturate your eventual 1 gbps connection is to use wire.

To help answer your question on this 'alternate architecture', a diagram of your design would help to better understand your objective here.
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