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Cable modem Ethernet into DSL router WAN port to use as a router - no DSL?

Last response: in Networking
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August 1, 2013 5:49:12 PM

So I'm trying to take use of this DSL modem/router I have laying around. The wireless is amazing and I haven't found another wireless router that has just as good wireless speed and quality.

Anyhow, we have cable now. The cable company gave me the E1200 and it was a complete bottleneck. I couldn't even pull 1MB/s. Without the router and hooking directly into the cable modem and rebooting, I pulled 3.3MB/s. So this is a common error on DSL Reports, with my cable company providing crap routers.

So this Netgear DSL modem/router has 10/100/1000 x4 and 300 Mbps wireless. I want this to run my wireless network.

Now is this possible?

I see a public LAN option on the router config and it's disabled.

Can I take the cable modem Ethernet, into the WAN/Uplink port onto the router, and then turn on Public LAN? I had this done last night but the DSL router couldn't pick up the connection from the modem. I never tried the Public LAN and cannot afford the downtime (big Internet family) like I had last night when running into issues. How can I take this old Netgear B90-7550 router and use it? I am going to get gigabit switches for the servers in the basement and upstairs (the router will only have two ports open and I need 3).


I can see the VersaPort options but is this WAN/Uplink port what I think it is? To connect modems into the router and pull an IP from the DHCP on the modem.

OR is it for something else? Do I need to put it into bridge mode for the WAN port? Again, I want to take the cable modem Internet into the router. On the router they supplied, I can see that it does get an IP address from DHCP (modem) but I'm statically assigned because of TiVo, so maybe I can configure something easier because of that?

It is talking about tunneling. I am only very knowledgeable in LAN management and don't know much about gateways and routers. I am learning!

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August 1, 2013 6:45:52 PM

Okay, here is the problem, your required to use a custom made hardware for a specific CableCo. that is only managed by the CableCo. but you like the high speed they provide. Your support mechinism is ONLY through the CableCo. absolutely nothing in the forums will help because all management and configuration is only (normally) accessible by the CableCo. CERTIFIED TECHNICIANS (aka we got you locked up so deal with it).

Considerings your generalized statements here I would say you are running at Business Class level then simple 'Big Internet Family' many may conceive of. Your running home servers, etc. I would tell you your EASIEST path would be to discuss with the CableCo (and yes it is a higher expense) about shifting to a business class level support, because you have extremely high end needs the CableCo. consumer level doesn't support.

That said, an analysis of your configuration with multi server location, three stories of systems and wanting accessibility throughout the house I would break down the impacted factors you need to address as follows:

1) you need Quality of Service (QoS) implemented in the router AND all systems that connect (no matter the system). QoS is a levelling system to implement prioritization for LAN traffic based on the standards you implement in the table. For example the servers that do FTP could be set to Level 1, while surfing website on the Internet could be set to Level 4 so they don't interfere with moving files to / from the servers.

2) Using Gigabit Switches won't "speed up" the network, if they all connect to the CableModem that is bogged down with someone watching Funny Kitty Youttube videos. You would be better served to create Virtual LANs or direct connection paths between the servers and other 'key' equipment (aka Dad's Office computer, not Mom's kitchen PC for recipies). Normally Wireless Routers use GB on the ports anyway, but interconnection between multiple routers/switches usually needs a cross-over cable, but that is DEPENDENT on the hardware. You should sit down and plan this out more.

3) 802.11ac is on the shelf now and costs the same as 802.11n (currently common hardware) devices. 802.11ac (http://en.wikipedia.org/wiki/IEEE_802.11ac) provides not only more speed and power but most importantly MIMO (multiple IN mulitple OUT) device support. Older equipment, things take 'turns' to talk (think walkie talkie). The more devices trying to talk / listen the longer (slower) the process takes.

4) I would highly recommend puttin in a 802.11ac router in the center of the house, and add 802.11ac adapaters to all wireless devices. If the location is hefty with thick walls / floors / etc. then consider 802.11ac extenders in the farthest point (far as I know we are talking a 5000sq foot mansion!) of the signal to boost them. Add 802.11ac USB adapters and people can walk anywhere without losing signal. Run lines to the servers from this central point (300ft limit I think), then setup QoS and Virtual Lans to isolate whom talks to what device and how they won't interfere with each other. Now from that point you just created your internal LAN, now seek your CableCo support to connect that to the 'outside world', as I suggested probably a Business Class Support Level you will need to get.
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