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Speed problems...


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Hi... I just got Comcast Internet service yesterday, the 6Mbps/384Kbps plan, and by my test results, I believe I'm a little slow. Any help will be greatly appreciated.

I have a Motorola SB5101 modem.

SpeedGuide.net TCP/IP Analyzer

TCP properties for IP = ()

Browser/OS = Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.1) Gecko/20060111 Firefox/1.5.0.1

Notes: Read the Analyzer FAQ if the above is not your IP address.

TCP options string = 020405b4

MTU = 1500

MTU is fully optimized for broadband.

MSS = 1460

Maximum useful data in each packet = 1460, which equals MSS.

Default TCP Receive Window (RWIN) = 65535

RWIN Scaling (RFC1323) = 0 bits

Unscaled TCP Receive Window = 65535

Note: TCP 1323 Options need to be enabled for RWIN over 2^16 (65535). Windows 9x might also need the MS Vtcp386 fix.

For optimum performance, consider changing RWIN to a multiple of MSS.

Other values for RWIN that might work well with your current MTU/MSS:

513920 (MSS x 44 * scale factor of 8)

256960 (MSS x 44 * scale factor of 4)

128480 (MSS x 44 * scale factor of 2)

64240 (MSS x 44)

bandwidth * delay product (Note this is not a speed test):

Your TCP Window limits you to: 2621.4 kbps (327.675 KBytes/s) @ 200ms

Your TCP Window limits you to: 1048.56 kbps (131.07 KBytes/s) @ 500ms

MTU Discovery (RFC1191) = ON

Time to live left = 113 hops

TTL value is ok.

Timestamps (RFC1323) = OFF

Selective Acknowledgements (RFC2018) = OFF

IP type of service field (RFC1349) = 00000000 (0)

:::.. Download Stats ..:::

Connection is:: 1062 Kbps about 1.1 Mbps (tested with 5983 kB)

Download Speed is:: 130 kB/s

Tested From:: https://testmy.net (server2)

Test Time:: Sat Feb 04 2006 02:32:10 GMT-0400 (Atlantic Standard Time)

Bottom Line:: 19X faster than 56K 1MB download in 7.88 sec

Diagnosis: May need help : running at only 22.32 % of your hosts average (comcast.net)

Validation Link:: https://testmy.net/stats/id-FICQZWU75

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THANKS A LOT!!!

:::.. Download Stats ..:::

Connection is:: 5581 Kbps about 5.6 Mbps (tested with 5983 kB)

Download Speed is:: 681 kB/s

Tested From:: https://testmy.net (server2)

Test Time:: Sat Feb 4 16:09:37 UTC-0400 2006

Bottom Line:: 100X faster than 56K 1MB download in 1.5 sec

Diagnosis: Looks Great : 17.27 % faster than the average for host (comcast.net)

Validation Link:: https://testmy.net/stats/id-3T1RGAK2Y

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