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Topic # 126860 22-Jul-2013 14:58
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I have a DSL 2870B wireless gigabit ADSL modem/router ( 

I am about to hook up to Telecom’s VDSL service. They have supplied the TG589vn vdsl modem (
). This does wireless and has 4 LAN ports, but only 100 Mbps.

My home network is wired cat 5e and there are 3 PCs, an XBOX and a few wireless devices I stream content to. (As an aside, there is also a Samsung TV but that and the xbox are connected to the 5 port switch as there is only one RJ45 in the TV room and I never use both simultaneously.)

I currently use the DSL 2870B for everything – it has an ADSL port and 4 x 1000Mbps LAN ports so works a charm.

Presumably best bet would be to buy an 8 port switch, but was wondering if I could:

  • Connect VDSL modem to one of the DSL 2870 ethernet ports.

  • Connect Xbox and 2xPC to the remaining 3 DSL 2870

  • Continue to use DSL2870 for wireless (given it has a gigabit connection to the network, whereas the new ADSL modem is only 100Mbps)

  • Connect remaining PC to the 100Mbps LAN port on the back of the new VDSL modem (speed not a major for this PC). If this is a deal-breaker I could buy a cheap 100Mbps switch and presumably connect the VDSL and remaining PC to this switch, and then connect this switch to the DSL 2870B?

Would this work? Presumably I’d have to play around with some settings to avoid ip conflicts? I’m assuming I can’t use the ADSL port on the back of the DSL 2870B as a LAN port, as that would give me the 5th 1000Mbps port I need. 

Thanks in advance.



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1044 posts

Uber Geek


  Reply # 863689 22-Jul-2013 15:52
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I'm hijacking your thread for my own nefarious purposes, although linked in a vaguely related way.

Would I be able to add my old Belkin ADSL/router/wi-fi doodad to a network based on my Thomson VDSL device? Having read that my old g-spec laptop will bog the network down to match its limited wifi connection speeds, and being much too Scottish to buy a new laptop, I'd hoped to find a way to get the Belkin to be seen as a separate node on the network, with the ancient laptop talking to that instead of crippling the wi-fi speeds available through the Thomson for various mobile devices in the household.

If such a cunning plan exists, I'd be mighty glad to hear from the networking god who can enlighten me.

Thanks in advance and cheers,

Update: Got the answer I was after in the VDSL thread, and happy to say that all went as claimed - two networks using the one VDSL modem and no speed hit on the faster network. Woohoo...

Galaxy S has gone to its new owner. HTC Sensation has gone to its new
owner. Galaxy S3 has gone to its new owner. Now using Galaxy Note 3. Skipping Note 4 I think...

633 posts

Ultimate Geek
+1 received by user: 124

  Reply # 863995 23-Jul-2013 01:29
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To the OP, Yes you can daisy chain them together.

You would need to change the LAN IP address of the the Dlink device to be on the same subnet as the VDSL router to one that doesn't conflict with it. You'd also need to change the Wireless side of the Dlink's IP address to be on the same subnet if it's set separately to the LAN IP address.

You would need to switch off any DHCP server on the Dlink, as the new VDSL router will already have a DHCP server on it, so you wouldn't want two on the same network for conflict issues. The VDSL router would then hand out DHCP details so clients correctly use it as their gateway.

The Dlink would simply become a switch and a Wi-Fi bridge with all devices on the one IP range on your network.

You could operate both units Wi-Fi's and put them on a seperate channel giving you two access points to choose from with their own bandwidth,. However running Wi-Fi on both of them may caused more interference with each other depending on the bandwidth they each use regardless of channel selection.

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