Thomson TG585 and Cisco E4200 setup

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dakie

80 posts

Master Geek
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#83035 9-May-2011 15:43

I currently have a Dynalink 1320 modem attached to my cisco e4200 router. The modem is playing up and needs to be reconfigured every few days.

I have a thomson tg585 that I thought I might use with the e4200, thomson downstairs in the kids games room and the e4200 upstairs in the lounge connected to the tv with a usb hdd attached.

What is the best way to configure both the tg585 and the e4200 to work together?

Ragnor

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#467532 10-May-2011 13:16

The 1320 is well known for running hot then eventually dying usually within a year or two.

If you're interested in a few quick mods to prevent the problem you can:

- Get one of these heatsinks from Jaycar for $4.50 and put it on the main chip inside
- Replace the caps with slightly higher rated ones (if they are damaged) very easily if you have a soldering iron and some basic skills.
- Also there is a 5v header you can solder to if you want to put a small fan in the case

Example

Q: Do you have the Dynalink RTA1320 using half bridge/ip extension or is it connected currently in a double NAT setup?

Basically there are a few ways the TG585 can be setup with the Cisco eg: Double NAT, WAN Bypass, DHCP Spoofing/Half Bridge, PPTP tunnel.

What I would recommend would be dependant on how tech savvy you are, are you comfortable with telnet and using a cmd line?

dakie

80 posts

Master Geek
+1 received by user: 2

#467556 10-May-2011 13:47

It is currently set up in half bridge mode.

Im thinking the best solution would be the easiest as I have never used Telnet

Ragnor

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#467568 10-May-2011 14:08

At the bottom of the home networking page in the Thomson admin ui is "Assign public IP address to a device...." .

The speedtouch then handles the authentication but hands the IP to the PC (router or other device) that you assign.

Note: You may need to make sure the Cisco is using a different LAN network, eg: if the Thomson is using 192.168.1.x configure the Cisco to use 192.168.2.x for LAN and DHCP, can't remember exactly if this is needed.

PatrickR

5 posts

Wannabe Geek

#469423 15-May-2011 22:27

Alternatively, you can configure the Thomson for fullcone NAT as per these instructions:

http://criticaltech.wordpress.com/2009/12/12/thomson-router-full-cone-nat-configuration/

The above post "Assign public IP address to device..." will effectively put the E4200 in the DMZ of the
Thomson. I've not able to find the thread/posts now, but I recall people having problems with this (i.e. sometimes
the downstream device (in this case the E4200) would loose routing).

Regards,

Patrick