Am I doing it right? CM>Switch>router&Airave>devices

[redbeardeddevil]

I live in an area that Sprint has semi-abandoned. To compensate they have given me an Airave device. Putting it between the cable modem and router kills the latency(from 32-40 to 160-250!). Putting it behind the router is a PITA. We get a lot of power blips here in my area, so it kills the settings. I got the bright idea of using a gigabit switch between the cable modem and both the router and the Airave. The router works but the speed dropped from an average of 110 Mbps to about 10. The Airave never worked after. I haven't checked the modem for settings as of yet. Am I missing something here? I will be trying different cables, check the modem settings, and trying the switch to router without the Airave. In the meantime are there any things I am missing or need to try? Thanks for the help.

 

[redbeardeddevil]

Devices in play are:
Thomson DM476 cable modem,
TP-Link TL-SG1008D Gigabit switch,
Edimax BR6478AC wireless router,
Sprint Airave 2.5+ femtocell,
Scientific Atlanta Cable phone modem (for house phones).

Everything is working correctly now, except for the Airave. I am wondering if the culprit is the Thomson not assigning addresses. I don't get to fool around with this level of networking as often as I used to. Small town means nothing fancy lol.

 

[redbeardeddevil]

I must be missing something fundamental here. I got the Airave working off the switch by removing everything else. When I add the router back to the switch, it will not get to the internet. My brain is fried from all of this. Anyone have an idea of what I am doing wrong, or that I'm failing to see?

Do I need to run a crossover cable from the CM to the switch? From the manual:

Connecting More Than Two Computers to the Cable Modem
If you need to connect two or more computers, you’ll need the following additional equipment (if supported by
your cable operator):
● Crossover-wired, or “null,” category 5 Ethernet cable for the cable modem to be connected to the hub
● 10/100/1000BaseT Hub or Switch.
● Straight through, or standard, category 5 Ethernet cable (one for each computer to be connected)
If you have a hub with an uplink port, a straight through cable can be used in combination with that port in lieu of
the crossover cable.
An uplink port has a small switch on it to change the polarity of the connection. It can accept either a crossover or
a straight cable, depending on the setting.

 

[abailey]

If your cable modem is only a modem and not a modem/router then you cannot set it up the way you have it. The cable modem is set up from your ISP to only hand out one IP address. To get more you have to pay for more. Most of the people I know that use devices like Airave put it behind their router.

 

[redbeardeddevil]

I forgot to post from the manual earlier. It should be able to handle both with the appropriate equipment according to what I have found online. Unless you know for sure that this one won't work. I will be grabbing a crossover cable from work tomorrow and try it. If it doesn't work then I guess I'll have to try something else. I appreciate the reply.

 

[abailey]

A crossover cable won't help. Your switch has Auto MIDI-x (as does most modern switches and routers). I can't find much data on your cable modem but it looks like it only has one Ethernet port on the back. This is almost always a sign that it is a modem only and not a modem/router.

 

[redbeardeddevil]

It's so weird with this modem. I bought this switch because of the Auto-MIDIX, among other things such as being Green. But after much searching, the manual says that in order to connect it to a switch that it requires a crossover. I am not saying you are wrong. I am going to try the old repair rule, try the cheapest, easiest thing first. I have a crossover cable at work. If that doesn't work, I guess I need a new CM. I am on Mediacom, so I guess Newegg here I come. Any recommendations for cable modems? In the meantime I will just have to live with setting it behind the router. I need to replace the batteries in my UPS so that I won't lose the settings so often. Thanks for the views and comments.

 

[sfx2000]

Devices in play are:
Thomson DM476 cable modem,
TP-Link TL-SG1008D Gigabit switch,
Edimax BR6478AC wireless router,
Sprint Airave 2.5+ femtocell,
Scientific Atlanta Cable phone modem (for house phones).

Everything is working correctly now, except for the Airave. I am wondering if the culprit is the Thomson not assigning addresses. I don't get to fool around with this level of networking as often as I used to. Small town means nothing fancy lol.

This should work...

Airave is already designed to get the IP from the ISP. Your router will act as the ISP and will assign everything for it via DHCP. Ensure that the AirRave is configured to obtain the IP address and login via DHCP.

1) Plug the AirRave 2.5 WAN port to one of your Router LAN ports

AirRave should grab an IP from the Router's DHCP server - for example, 192.168.1.107 - configure this as a DHCP static assignment if possible

2) Port Forward the AirRave IP address for the following port range - 5060 thru 5061 UDP only

2a) Alt config - if the router cannot port forward, you can also put the AirRave into the DMZ, bypassing the Router Firewall, and then you don't need to explicitly set the ports.

The AirRave should eventually sync up with the Sprint head-end server...

sfx

 

[Nerre]

If you need to connect two or more computers, you’ll need the following additional equipment (if supported by your cable operator):

Text bolded by me. Usually operators DON'T support more than one device. (The reason is that there is a lack of usable IP addresses.)

This means you MUST have a router closest to the modem.

 

[CGPeters61]

reply

Text bolded by me. Usually operators DON'T support more than one device. (The reason is that there is a lack of usable IP addresses.)

This means you MUST have a router closest to the modem.

You can set up personall IP adresses. and link them to the main IPto get out on the internet