[Cable] Why does my Mac get 4x the bandwidth ? in Broadband Tweaks http://www.dslreports.com/forum/r20377786 en Tue, 02 Dec 2008 11:07:41 EDT Tue, 02 Dec 2008 11:07:41 EDT Re: [Cable] Why does my Mac get 4x the bandwidth ? http://www.dslreports.com/forum/remark,20643447 Ikyuao : What if I start with pinging to google site? that would be 1ms RTT traveling through routers of internet that would be overkill that is not happening, Irish. Most of internet does 50ms RTT to 100ms RTT that 64K RWIN is still small buffer and inefficient for speed of internet bandwidth so get a clue. Come on it's a truth, dude.


That is no 1ms RTT that means 64K RWIN buffer is not enough at 50ms RTT or above across routers of internet.
]]> http://www.dslreports.com/forum/remark,20643447 Sat, 14 Jun 2008 16:31:39 EDT Re: [Cable] Why does my Mac get 4x the bandwidth ? http://www.dslreports.com/forum/remark,20643352 Irish Shark : When 100mb/s comes around, then go nuts on the RWIN. Right now 64240 is plenty in many cases.

BTW, RWIN has nada to do with a LAN - it is an Internet only setting.
--
"You can observe a lot by watching". Yogi Berra]]> http://www.dslreports.com/forum/remark,20643352 Sat, 14 Jun 2008 16:09:18 EDT Re: [Cable] Why does my Mac get 4x the bandwidth ? http://www.dslreports.com/forum/remark,20643327 Ikyuao :
said by Irish Shark See Profile :

said by Ikyuao See Profile :

64K RWIN is too small and inefficient for most high bandwidth bandbroad connection (cable, DSL T1, T3, fiber etc) this present today.
No it is not. It depends on your line rate.
What if cable companies keeps increasing more bandwidth in future? Comcast have promised to increase to 100Mbits broadband in 2010? Then 64K RWIN buffer is too small and inefficient that's it. That is not about local area network, It is about wide area network as internet.]]> http://www.dslreports.com/forum/remark,20643327 Sat, 14 Jun 2008 16:03:28 EDT Re: [Cable] Why does my Mac get 4x the bandwidth ? http://www.dslreports.com/forum/remark,20643259 Irish Shark :
said by Ikyuao See Profile :

64K RWIN is too small and inefficient for most high bandwidth bandbroad connection (cable, DSL T1, T3, fiber etc) this present today.
No it is not. It depends on your line rate.
--
"You can observe a lot by watching". Yogi Berra]]> http://www.dslreports.com/forum/remark,20643259 Sat, 14 Jun 2008 15:47:09 EDT Re: [Cable] Why does my Mac get 4x the bandwidth ? http://www.dslreports.com/forum/remark,20642938 Ikyuao : 64K RWIN is too small and inefficient for most high bandwidth bandbroad connection (cable, DSL T1, T3, fiber etc) this present today.]]> http://www.dslreports.com/forum/remark,20642938 Sat, 14 Jun 2008 14:15:48 EDT Re: [Cable] Why does my Mac get 4x the bandwidth ? http://www.dslreports.com/forum/remark,20379804 anon : I tried that RWIN value and it made no difference. Any other ideas?]]> http://www.dslreports.com/forum/remark,20379804 Thu, 24 Apr 2008 13:16:54 EDT Re: [Cable] Why does my Mac get 4x the bandwidth ? http://www.dslreports.com/forum/remark,20379491 Irish Shark : Try an RWIN of 64240 and see what that does.]]> http://www.dslreports.com/forum/remark,20379491 Thu, 24 Apr 2008 12:24:19 EDT [Cable] Why does my Mac get 4x the bandwidth ? http://www.dslreports.com/forum/remark,20377786 anon : Hi,

I just upgraded to Comcast Cable's 6Mbit plan (with 12 Mbit powerboost). I have three computers (all wirelessly connected to the same router) which are consistently demonstrating the following bandwidth discrepancy:

1) Windows XP pro laptop : 5 Mbit down
2) Windows XP pro desktop : 5 Mbit down
3) Macbook Pro laptop : 20 Mbit down (!)

I've just spend the last couple hours trying to tweak my Windows XP laptop but have had no luck getting the bandwidth to increase. I ran the SG TCP Optimizer for example (I'll copy the changes it made at the end of this post). I just can't understand why the Mac laptop is so much faster...

Here are the answers to the initial questions for my Windows laptop:

1) »/tweakr/block:···a=normal

2) speed Test #49695790 by dslreports.com
Run: 2008-04-24 00:56:29 EST
Download: 4726 (Kbps)
Upload: 1539 (Kbps)

The Mac consistently gets download speeds around 20,000Kbps!

3) Wouldn't let me do (not a member)

4) I have Comcast Cable (modem shouldn't matter b/c I'm getting great speeds with the Mac)

5) n/a

6) n/a

7) Windows XP Pro

8) 6 Mbit (12 Mbit powerboost)

9) No connection sharing or VPN

10) Using WRT54G wireless router

11) n/a

------------

[SYSTEM\CurrentControlSet\Services\Tcpip\Parameters]
TcpWindowSize=256960
GlobalMaxTcpWindowSize=256960
EnablePMTUDiscovery=1
EnablePMTUBHDetect=0
SackOpts=1
DefaultTTL=64
TcpMaxDupAcks=2
Tcp1323Opts=1
DisableUserTOSSetting=-1
DefaultTOSValue=-1
[SYSTEM\CurrentControlSet\Services\Afd\Parameters]
DefaultReceiveWindow=-1
[Software\Microsoft\Windows\CurrentVersion\Internet Settings]
MaxConnectionsPerServer=10
MaxConnectionsPer1_0Server=10
[SYSTEM\CurrentControlSet\Services\ICSharing\Settings\General]
InternetMTU=-1
[SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\RemoteComputer\NameSpace\{D6277990-4C6A-11CF-8D87-00AA0060F5BF}]
{D6277990-4C6A-11CF-8D87-00AA0060F5BF}=-2
[SYSTEM\CurrentControlSet\Services\Dnscache\Parameters]
MaxNegativeCacheTtl=0
NegativeCacheTime=-1
NetFailureCacheTime=0
NegativeSOACacheTime=0
[SOFTWARE\Policies\Microsoft\Windows\Psched]
NonBestEffortLimit=-2
[SYSTEM\CurrentControlSet\Services\Tcpip\ServiceProvider]
LocalPriority=5
HostsPriority=6
DnsPriority=7
NetbtPriority=8
[System\CurrentControlSet\Services\LanmanServer\Parameters]
SizReqBuf=16384
[SYSTEM\CurrentControlSet\Services\NdisWan\Parameters\Protocols\0]
ProtocolMTU=1500
[SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{D37167D0-E65B-463B-94EC-217F4CBCE836}]
MTU=-1
TcpWindowSize=-1
[SYSTEM\CurrentControlSet\Services\Psched\Parameters\Adapters\{D37167D0-E65B-463B-94EC-217F4CBCE836}]
NonBestEffortLimit=-1
[SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{0719BB45-D044-4545-8442-1A577D223FAF}]
MTU=1500
TcpWindowSize=-1
[SYSTEM\CurrentControlSet\Services\Psched\Parameters\Adapters\{0719BB45-D044-4545-8442-1A577D223FAF}]
NonBestEffortLimit=-1
[SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{F110305D-3979-4D30-92AC-B2C1F4AAC9CD}]
MTU=1300
TcpWindowSize=-1
[SYSTEM\CurrentControlSet\Services\Psched\Parameters\Adapters\{F110305D-3979-4D30-92AC-B2C1F4AAC9CD}]
NonBestEffortLimit=-2
[SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{130AA788-46CD-4400-94A5-AEB57884FFA9}]
MTU=-1
TcpWindowSize=-1
[SYSTEM\CurrentControlSet\Services\Psched\Parameters\Adapters\{130AA788-46CD-4400-94A5-AEB57884FFA9}]
NonBestEffortLimit=-2
[SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{BB1BB564-A084-475B-9653-CD44EB765399}]
MTU=1300
TcpWindowSize=-1
[SYSTEM\CurrentControlSet\Services\Psched\Parameters\Adapters\{BB1BB564-A084-475B-9653-CD44EB765399}]
NonBestEffortLimit=-2
[SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{92D21647-46A9-4E41-8D12-B57260949A25}]
MTU=-1
TcpWindowSize=-1
[SYSTEM\CurrentControlSet\Services\Psched\Parameters\Adapters\{92D21647-46A9-4E41-8D12-B57260949A25}]
NonBestEffortLimit=-1
[SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{39DAF23D-DE3E-442F-ADA0-FBD364A9AC4B}]
MTU=-1
TcpWindowSize=-1
[SYSTEM\CurrentControlSet\Services\Psched\Parameters\Adapters\{39DAF23D-DE3E-442F-ADA0-FBD364A9AC4B}]
NonBestEffortLimit=-1]]> http://www.dslreports.com/forum/remark,20377786 Thu, 24 Apr 2008 01:15:24 EDT