MTU setting

US.M@JORHAZZARD · 10-01-2006, 22:13

Can anyone tell me the recommended MTU setting for Cable please...
I'm getting major packet loss of upto 26% after only being on TS for a few seconds and then ppl break up can be really anoying in the heat of a battle...

Also getting pings on BF2 on UK/Euro servers of between 25 and 40 where others are getting around 10-20 max...

NTL 250 connected to Netgear RP614 router & 10 meg service, using Dr TCP to adjust MTU values and other settings..

Any help would be greatly appreciated...

Hazz.....

JonathanLH · 10-01-2006, 22:23

connecting via ethernet? the default i believe is 1500
sounds like you have other issues though, signal levels on the cable modem ok?

US.M@JORHAZZARD · 10-01-2006, 22:33

Quote:

Originally Posted by JonathanLH

connecting via ethernet? the default i believe is 1500
sounds like you have other issues though, signal levels on the cable modem ok?

How would i find this info ?.

JonathanLH · 10-01-2006, 22:54

http://192.168.100.1
user/pass is root

US.M@JORHAZZARD · 10-01-2006, 23:02

Sorry my bad should have said where in the settings i would find this info...

---------- Post added at 00:02 ---------- Previous post was at 00:01 ----------

Is this what you mean ?

Downstream Lock : LockedDownstream Channel Id : 1Downstream Frequency : 402750000 HzDownstream Modulation : QAM64Downstream Symbol Rate : 5056.941 Ksym/secDownstream Interleave Depth : taps32Increment4Downstream Receive Power Level : -12.7 dBmVDownstream SNR : 34.1 dB

**Paul** · 11-01-2006, 00:00

MTU is set on your PC, not the modem. It should be 1500.

swoop101 · 11-01-2006, 04:27

Run the tweak tester from:

http://www.dslreports.com/tweaks

see if it can help.

US.M@JORHAZZARD · 11-01-2006, 10:23

After running the dsl tweak test you have to input some data i.e service provider, O/S that sort of stuff, where i get stuck is on the connection type which do i pick ethernet, WINXPpppoe, routerpppoe or normal ?.

these are the results with WINXPpppoe

1. Your Tweakable Settings:
Receive Window (RWIN): 65535
Window Scaling: off
Path MTU Discovery: ON
RFC1323 Window Scaling: OFF
RFC1323 Time Stamping: OFF
Selective Acks: ON
MSS requested: 1460
TTL:131
(less any hops behind firewall)
TTL remaining: 120
TOS/TOS subfield: 0
TOS/Flags:
2. Test 491101 byte download

Actual data bytes sent: 491101
Actual data packets: 338
Max packet sent (MTU): 1500
Max packet recd (MTU): 1500
Retransmitted data packets: 0
sacks you sent: 2
pushed data pkts: 48
data transmit time: 3.316 secs
our max idletime: 1469.5 ms
transfer rate: 134695 bytes/sec
transfer rate: 1077 kbits/sec
This is not a speed test!
transfer efficiency: 100%
3. ICMP (ping) check

Minimum ping: 87.36 ms
Maximum ping: 116.33 ms
Ping stability:
89.77 116.33 87.54 88.21 88.60 88.77 89.44 90.05 87.36 90.97

Notes and recommendations:

Check FAQ on MTU for XP (FAQ #2252) both of these i keep getting.

Input line speed for RWIN recommendation

Looking good

Notes and recommendations:

Good data stream (no/few rexmits)

1 second+ stall detected (FAQ #1606)

Notes and recommendations:

Looking good

swoop101 · 11-01-2006, 10:30

Try with normal

US.M@JORHAZZARD · 11-01-2006, 10:37

Damn SWOOP that was fast lol.

Hold on ill do it now.

---------- Post added at 11:37 ---------- Previous post was at 11:32 ----------

OK here are the results with a normal connection type also 1 other thing the connection sped i cannot enter as im running NTL BB 10mb service and the little box doesn't allow for the correct value...

NORMAL CONNECTION TYPE:

1. Your Tweakable Settings:
Receive Window (RWIN): 65535
Window Scaling: off
Path MTU Discovery: ON
RFC1323 Window Scaling: OFF
RFC1323 Time Stamping: OFF
Selective Acks: ON
MSS requested: 1460
TTL:131
(less any hops behind firewall)
TTL remaining: 120
TOS/TOS subfield: 0
TOS/Flags:
2. Test 432701 byte download

Actual data bytes sent: 432701
Actual data packets: 298
Max packet sent (MTU): 1500
Max packet recd (MTU): 1500
Retransmitted data packets: 0
sacks you sent: 27
pushed data pkts: 44
data transmit time: 4.844 secs
our max idletime: 2068.9 ms
transfer rate: 80323 bytes/sec
transfer rate: 642 kbits/sec
This is not a speed test!
transfer efficiency: 100%
3. ICMP (ping) check

Minimum ping: 86.63 ms
Maximum ping: 105.40 ms
Ping stability:
88.46 90.98 87.41 86.63 89.33 105.40 86.99 88.70 89.40 88.36

Notes and recommendations:

Input line speed for RWIN recommendation

Looking good

Notes and recommendations:

Good data stream (no/few rexmits)

2+ second stall detected (FAQ #1606)

Notes and recommendations:

Looking good

Note i have set MTU at 1500 in my Netgear RP614 R.3 router and haven't started playing with DR TCP today and when i got fed up last night i reset all the DR TCP setting back to default...

swoop101 · 11-01-2006, 10:39

put in 10000 for speed.

Just realised I have not reset mine, will post again in a while.
Please note I missed a 0 off the above number

US.M@JORHAZZARD · 11-01-2006, 10:46

I'll start with the speed at 1000 and see what i get but do i enter the values of the tweakable settings in DR TCP i.e

1. Your Tweakable Settings:
Receive Window (RWIN): 65535
Window Scaling: off
Path MTU Discovery: ON
RFC1323 Window Scaling: OFF
RFC1323 Time Stamping: OFF
Selective Acks: ON
MSS requested: 1460
TTL:131
(less any hops behind firewall)
TTL remaining: 120
TOS/TOS subfield: 0
TOS/Flags:

So do i change the the values printed in bold type or is it more trial and error ?...

BTW thanks for all yr help man and the timely responses...

either you have just left school or are bored at work or LIKE ME you are unemployed lmao either way thanks man...

---------- Post added at 11:46 ---------- Previous post was at 11:45 ----------

Damn tweak test is always blinking busy lol...

swoop101 · 11-01-2006, 10:54

My results using normal and 10000

1. Your Tweakable Settings:
Receive Window (RWIN): 251120
Window Scaling: 2
Path MTU Discovery: ON
RFC1323 Window Scaling: ON
RFC1323 Time Stamping: OFF
Selective Acks: ON
MSS requested: 1460
TTL:
(less any hops behind firewall)
129
TTL remaining: 118
TOS/TOS subfield: 0
TOS/Flags:

2. Test 100741 byte download
Actual data bytes sent: 100741
Actual data packets: 70
Max packet sent (MTU): 1500
Max packet recd (MTU): 1500
Retransmitted data packets: 0
sacks you sent: 1
pushed data pkts: 15
data transmit time: 1.110 secs
our max idletime: 1957.4 ms
transfer rate: 31629 bytes/sec
transfer rate: 253 kbits/sec
This is not a speed test!
transfer efficiency: 100%

3. ICMP (ping) check
Minimum ping: 85.18 ms
Maximum ping: 96.73 ms
Ping stability:
93.09 96.73 86.35 86.19 86.89 87.35 85.18 90.76 86.59 87.05

Notes and recommendations:
RWIN is in range
Looking good

Notes and recommendations:
Good data stream (no/few rexmits)
1 second+ stall detected (FAQ #1606)

Notes and recommendations:
Looking good

And I work split shifts so am on my din-dins LOL

US.M@JORHAZZARD · 11-01-2006, 10:56

LOL ok set connection speed at 10000 and lmao it goes from bad to worse...

1. Your Tweakable Settings:
Receive Window (RWIN): 65535
Window Scaling: offP
ath MTU Discovery: ON
RFC1323 Window Scaling: OFF
RFC1323 Time Stamping: OFF
Selective Acks: ON
MSS requested: 1460
TTL:131
(less any hops behind firewall)

TTL remaining: 120
TOS/TOS subfield: 0
TOS/Flags:
2. Test 650241 byte download

Actual data bytes sent: 650241
Actual data packets: 447
Max packet sent (MTU): 1500
Max packet recd (MTU): 1500
Retransmitted data packets: 0
sacks you sent: 31
pushed data pkts: 61
data transmit time: 5.741 secs
our max idletime: 1162.9 ms
transfer rate: 103651 bytes/sec
transfer rate: 829 kbits/sec
This is not a speed test!
transfer efficiency: 100%
3. ICMP (ping) check

Minimum ping: 87.62 ms
Maximum ping: 102.39 ms
Ping stability:
- 87.74 89.37 87.62 97.41 101.89 88.97 91.78 87.96 102.39
Loss at 56byte pkts: 0%
Loss at 1000byte pkts: 0%
Average Big ping: 97 ms
Big ping stability:
100.38 108.33 91.12 127.34 95.78 92.25 91.78 91.55 114.03 91.83 91.60 91.49 92.15 91.63 92.61 100.15 91.45 92.08 99.63 111.60 91.75 124.97 93.08 94.14 90.13 107.37 93.25 91.17 95.25 91.43 ms

Notes and recommendations:

Choose RWIN between 94900 and 251120 (FAQ #586)

download/use DRTCP .. (FAQ #578)

Read the tweak FAQ

Notes and recommendations:

Good data stream (no/few rexmits)

1 second+ stall detected (FAQ #1606)

Notes and recommendations:

Run a line quality

---------- Post added at 11:56 ---------- Previous post was at 11:54 ----------

If i was to enter your settings into DR TCP would i maybe get a similar result as we are both on NTL BB 10 mb service ?...

swoop101 · 11-01-2006, 10:58

As to the original problem, I would assume that the problem is congestion in your area/cabinet.
Ring NTL to see if they can help with info.
I hope you can get it sorted.

Try my setting to see if it helps.