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Author Topic: Admin access to modems - second cable?  (Read 2055 times)

Weaver

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  • Posts: 11459
  • Retd s/w dev; A&A; 4x7km ADSL2 lines; Firebrick
Admin access to modems - second cable?
« on: September 17, 2018, 04:33:24 AM »

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j0hn

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Re: Admin access to modems - second cable?
« Reply #1 on: September 17, 2018, 08:48:40 AM »

Yes that is possible but it is entirely unnecessary.

With the correct config on your Firebrick you can access each individual modem through its existing single LAN cable.
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Talktalk FTTP 550/75 - Speedtest - BQM

Ixel

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Re: Admin access to modems - second cable?
« Reply #2 on: September 17, 2018, 03:00:56 PM »

I did something like this with my DrayTek devices. However, the DrayTek devices also ended up broadcasting PPPoE connection attempts for some reason so I had to isolate the 'second cable' on each of them using a VLAN tag on my EdgeSwitch. Now they can no longer see each other, just the FireBrick, EdgeSwitch and my virtual machine which monitors and records DSL statistics from both of the DrayTek devices.
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Weaver

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  • Posts: 11459
  • Retd s/w dev; A&A; 4x7km ADSL2 lines; Firebrick
Re: Admin access to modems - second cable?
« Reply #3 on: September 17, 2018, 03:18:19 PM »

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johnson

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Re: Admin access to modems - second cable?
« Reply #4 on: September 18, 2018, 12:57:30 AM »

A 2 cable solution, i.e 1 for the PPPoE session and 1 for admin/stats access works fine with zyxel modems, but you need to set up separate "Interface Groups" from the web gui as per:

https://kitz.co.uk/routers/zyxel_VMG8324-B10A_bridge.htm

Otherwise as Ixel mentioned, the modem is expecting to negotiate a PPPoE session over any cable plugged in. Each of these groups are assigned a different IP address that you can change under the "Home Networking" tab.
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Weaver

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  • Posts: 11459
  • Retd s/w dev; A&A; 4x7km ADSL2 lines; Firebrick
Re: Admin access to modems - second cable?
« Reply #5 on: September 18, 2018, 06:55:48 AM »

Well spotted, I had forgotten about that article.
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