re: Question about 'Change the MTU and RWIN Settings in Dial-Up Networking'
Saturday, February 16, 2002 at 6:57 am
Windows XP Annoyances Discussion Forum
Posted by Jason Suttle
(1 messages posted)
On Tuesday, October 30, 2001 at 3:11 am, Patrick wrote:
>This Registry fix applies to ALL AOL users who installed AOL v4.0 or v5.0 32-bit
>software for Windows 95/98, and is aimed to obtain MAXimum transfer speeed on AOL,
>with a 28 - 56 kbps analog modem.
>This is THE ONLY way you can force AOL 4.0 and 5.0 to use a MTU value other than
>1500 or 1472 (default), which is optimized ONLY for LAN/WAN networks, xDSL and cable
>and satellite modems, but NOT for analog modems, no matter how you connect to AOL:
>using AOL as your primary ISP by dialing one of AOL's local phone numbers available
>in your area;
>using another primary ISP to log on to the Internet, and then using AOL's TCP/IP
>protocol to sign on to AOL.
>CREDITS: This workaround was successfully experimented by Arvid J. Bloom (ajbloom@aol.com)
>with AOL v4.0, and by Jeff Balliett (SEAL81044@aol.com) with AOL v5.0. Many thanks
>for sharing!
>
>THE BUG:
>
>When you install AOL 4.0 or 5.0 on your Windows 9x computer, it creates this new
>Registry key, you can see by running Regedit:
>
>HKEY_LOCAL_MACHINE\SOFTWARE\America Online\AOL\aolsock
>
>and in the right hand pane you'll notice one of these DWORD values (default):
>
>mtu 0x000005dc (1500)
>
>or:
>
>mtu 0x000005c0 (1472)
>
>THE FIXES:
>
>
>You MUST apply this fix [delete the "aolsock" Registry key], and then set your TCP/IP
>MTU to 576, as described in the "AOL MAXMTU REVISITED" topic, also in AOLTIPS.TXT,
>part of my Win9x/2000/ME/XP + DOS 7/8 ©Tricks + Secrets files [W95-11D.ZIP], to
make
>all this work properly!
>
>
>On some Win9x machines you'll also notice this AOL 4/5 Registry key (using Regedit):
>HKEY_LOCAL_MACHINE\Software\America Online\AOL\AolsockBack
>
>If your Registry doesn't have this key, you need to create it: start Regedit ->
go
>to:
>
>HKEY_LOCAL_MACHINE\Software\America Online\AOL
>
>right-click on "AOL" -> select New -> click Key -> type "AolsockBack" (no quotes)
>-> click OK or press Enter.
>This is the "AolsockBack" MTU DWORD value in the right hand pane (default):
>
>mtu 0x000005dc (1500)
>
>or:
>
>mtu 0x000005c0 (1472)
>
>To create a new "mtu" DWORD (if not present) under "AolsockBack": right-click in
>the right hand pane -> select New -> DWORD Value -> name it "mtu" (no quotes) ->
>click OK or press Enter.
>To change the MTU used by AOL to 576 (for MAX speeed) under "AolsockBack": right-click
>on "mtu" -> select Modify -> check the Decimal box -> type 576 -> click OK or press
>Enter.
>Now restart Windows and log on to AOL.
>According to Arvid (using AOL v4.0) and to Jeff (using AOL v5.0), their download
>speeds went from 1-2 KB/sec to 4-5 KB/sec, sometimes even faster, ONLY after applying
>this tweak!
>Have fun.
>
>
>
>
>On Friday, October 26, 2001 at 9:36 am, steve wrote:
>I have a question about Change
>the MTU and RWIN Settings in Dial-Up Networking:
>can I do this for windowsXP? I have looked but can't find them...am I missing something
>or just going blind? LOL
>
>
>
That's great for AOL users, but what about those of us who use an independent ISP?
Is there hope for us too? :)
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