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Question on MTU


ajb62787
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is it part of the tweaks that makes my download  start  at  like  1300kB/s and drops down to 350 kB/s  which is my  download speed

well, the tweaks can work like that if you have problems with connection, it start fast cos you have a big receivebuffer

follow all these steps and post again https://testmy.net/forum/t-2097

VanBuren :)

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Receive Window (RWIN): 256960

Window Scaling: 2

Path MTU Discovery: ON

RFC1323 Window Scaling: ON

RFC1323 Time Stamping: OFF

Selective Acks: ON

MSS requested: 1452

TTL:

(less any hops behind firewall)

64

TTL remaining: 51

2. Test 146000 byte download

Actual data bytes sent: 146000

Actual data packets: 101

Max packet sent (MTU): 1492

Max packet recd (MTU): 1492

Retransmitted data packets: 0

sacks you sent: 0

pushed data pkts: 2

data transmit time: 0.349 secs

our max idletime: 49.4 ms

transfer rate: 165536 bytes/sec

transfer rate: 1324 kbits/sec

This is not a speed test!

transfer efficiency: 100%

3. ICMP (ping) check

Minimum ping: 29 ms

Maximum ping: 40 ms

Ping stability:

34 40 32 32 30 30 30 29 31 30

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

Connection is:: 2801 Kbps about 2.8 Mbps (tested with 2992 kB)

Download Speed is:: 342 kB/s

Tested From:: https://testmy.net/ (server1)

Test Time:: Mon Aug 08 2005 17:11:29 GMT-0400 (Eastern Daylight Time)

Bottom Line:: 50X faster than 56K 1MB download in 2.99 sec

Diagnosis: May need help : running at only 65.97 % of your hosts average (verizon.net)

Validation Link:: https://testmy.net/stats/id-RQUY3F68X

:::.. Upload Stats ..:::

Connection is:: 543 Kbps about 0.5 Mbps (tested with 579 kB)

Upload Speed is:: 66 kB/s

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

Test Time:: Mon Aug 08 2005 17:14:46 GMT-0400 (Eastern Daylight Time)

Bottom Line:: 10X faster than 56K 1MB upload in 15.52 sec

Diagnosis: May need help : running at only 87.3 % of your hosts average (verizon.net)

Validation Link:: https://testmy.net/stats/id-FSAI9O081

http://nitro.ucsc.edu/

running 10s outbound test (client to server) . . . . . 603.80Kb/s

running 10s inbound test (server to client) . . . . . . 2.69Mb/s

Your PC is connected to a Cable/DSL modem

Information: Other network traffic is congesting the link

The current date is: Mon 08/08/2005

The current time is: 17:15:40.10

Microsoft Windows XP [Version 5.1.2600]

Pinging testmy.net [67.18.179.85] with 32 bytes of data:

Reply from 67.18.179.85: bytes=32 time=77ms TTL=52

Reply from 67.18.179.85: bytes=32 time=46ms TTL=52

Reply from 67.18.179.85: bytes=32 time=50ms TTL=52

Reply from 67.18.179.85: bytes=32 time=49ms TTL=52

Ping statistics for 67.18.179.85:

    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),

Approximate round trip times in milli-seconds:

    Minimum = 46ms, Maximum = 77ms, Average = 55ms

Ping Complete.

Tracing route to testmy.net [67.18.179.85]

over a maximum of 30 hops:

  1    <1 ms    <1 ms    <1 ms  dslrouter [192.168.1.1]

  2    24 ms    23 ms    23 ms  10.4.1.1

  3    24 ms    24 ms    25 ms  130.81.10.225

  4    20 ms    39 ms    40 ms  so-2-0-0-0.BB-RTR1.RES.verizon-gni.net [130.81.18.120]

  5    74 ms    46 ms    35 ms  130.81.10.90

  6    26 ms    26 ms    27 ms  so-0-2-0-0.e1.Washington1.Level3.net [67.29.172.13]

  7    27 ms    28 ms    26 ms  so-2-1-0.bbr1.Washington1.Level3.net [209.244.11.9]

  8    63 ms    65 ms    67 ms  as-0-0.bbr2.Dallas1.Level3.net [64.159.0.137]

  9    73 ms    78 ms    70 ms  ge-1-2-52.car3.Dallas1.Level3.net [4.68.122.38]

10    27 ms    42 ms    80 ms  4.78.220.10

11    46 ms    77 ms    65 ms  dist-vlan32.dsr3-1.dllstx3.theplanet.com [70.85.127.61]

12    65 ms    42 ms    64 ms  dist-vlan41.dsr2-1.dllstx4.theplanet.com [70.85.127.83]

13    65 ms    65 ms    49 ms  gig1-0-1.tp-car9-1.dllstx4.theplanet.com [67.18.116.69]

14    50 ms    73 ms    53 ms  85.67-18-179.reverse.theplanet.com [67.18.179.85]

Trace complete.

Everything Complete!  Now  to hand it over to you Van

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Update from the congested  nitro  link

With no programs  running....

Checking for Middleboxes . . . . . . . . . . . . . . . . . .  Done

running 10s outbound test (client to server) . . . . . 606.63Kb/s

running 10s inbound test (server to client) . . . . . . 2.67Mb/s

Your PC is connected to a Cable/DSL modem

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im no expert in modems, but i belive you can run PPPoE without using a router

http://www.dslreports.com/faq/2252

"Q: Raising MTU from 1480 with WinXP, using *built in* PPPoE connection software. (#2252) 

A: As of 10/15/01, there is no way known to raise MTU in WinXP from 1480. This issue is seen only by WinXP users who are connecting with the built in PPPoE connection software. If you change to RASPPPoE, or use a router instead, your MTU should then default to 1492. RASPPPoE is popular, free, and less problematic than WinPoet (another choice).

This small difference (12 bytes) in MTU is negligible however, and should cause no concern. Check back from time to time though for a "fix"."

the "built in" setup look like this http://dslnuts.com/pppoe/XPCON.htm

VanBuren :)

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