http://www.dslreports.com/forum/Re-ADSL2-Modem-With-a-ADSL-router-22640238 en Fri, 10 Feb 2012 14:55:33 EDT Fri, 10 Feb 2012 14:55:33 EDT http://www.dslreports.com/forum/Re-ADSL2-Modem-With-a-ADSL-router-22642107
Earlier modems were just bridge modems and whatever connected to the modem had to handle the PPPoE (either your PC directly connected to it, or a router).

Current modems are usually modem/router and handle the PPPoE. If you put a router behind that you have to make sure that the LAN side of the router is a different IP range than used on the LAN side of the modem. Even if you have the modem pass through your public IP, the modem might use a private IP as its LAN gateway.

Not sure if that is the speed issue or if it is an MTU issue. PPPoE has an 8-byte header, so it max MTU is 1492. Your LAN may not know that due to the router and assumes default ethernet MTU of 1500, so packets can get fragmented.

If your router has an MTU setting for its WAN, you might try setting that to 1492. Otherwise if the modem was bridged and the router did PPPoE it would likely communicate that to the LAN, but then you might not be able to access stats on your modem.]]> http://www.dslreports.com/forum/Re-ADSL2-Modem-With-a-ADSL-router-22642107 Wed, 01 Jul 2009 21:02:52 EDT http://www.dslreports.com/forum/Re-ADSL2-Modem-With-a-ADSL-router-22641761 http://www.dslreports.com/forum/Re-ADSL2-Modem-With-a-ADSL-router-22641761 Wed, 01 Jul 2009 19:50:43 EDT http://www.dslreports.com/forum/Re-ADSL2-Modem-With-a-ADSL-router-22641722
I had about the same speed from Cable 4000-5000 kbps
and going through the router it never changed.

I have since reset the router to factory defaults and still no change.

Power cycled both the modem and router to no avail.]]> http://www.dslreports.com/forum/Re-ADSL2-Modem-With-a-ADSL-router-22641722 Wed, 01 Jul 2009 19:42:03 EDT http://www.dslreports.com/forum/Re-ADSL2-Modem-With-a-ADSL-router-22641640
ADSL2 is a second generation ADSL spec. ADSL2 offers better performance over marginal lines and other minor improvements. All that is done within the modem itself has no affect on router.

Since speed is low using wired Ethernet you have eliminated WiFi as the problem. What speed did you have with Cable? My first guess would be the router is underpowered. But Cable is typically faster then DSL so that is unlikely.

I took a quick look at the manual but is is pretty short on details.
»www.belkin.com/support/article/?···scid=221

/tom]]> http://www.dslreports.com/forum/Re-ADSL2-Modem-With-a-ADSL-router-22641640 Wed, 01 Jul 2009 19:22:48 EDT http://www.dslreports.com/forum/Re-ADSL2-Modem-With-a-ADSL-router-22641599
With switching internet types you may need to make some tweaks to your PC to maximize the speed of the connection.
--
Brian

"It drops into your stomach like a Abrams's tank.... driven by Rosanne Barr..." A. Bourdain]]> http://www.dslreports.com/forum/Re-ADSL2-Modem-With-a-ADSL-router-22641599 Wed, 01 Jul 2009 19:11:33 EDT http://www.dslreports.com/forum/ADSL2-Modem-With-a-ADSL-router-22640238
I have a Belkin F5D9231-4 Wireless router that says it supports ADSL And Cable.

But the AT&T Modem I have says it is ADSL2+

Will these two work correctly together?

The reason I am asking this question is:

When I hookup the router to the modem my speed is cut by 2\3.

This is using wireless or wired to the same computer.

If I remove the router and just connect the modem directly to the computer through the cable its fine.

Speed with modem direct is = 5072 kbps

With router in line speed is = 1072 kbps

By the way I recently had cable and used roadrunner with this same router and had no issues what so ever.

I thank you for any help in this matter.]]> http://www.dslreports.com/forum/ADSL2-Modem-With-a-ADSL-router-22640238 Wed, 01 Jul 2009 14:52:15 EDT