MTU stuck?!

[amitz3]

Hello all

It seems like my MTU is stuck or something the reg value shows: 1500 but in the diagnostic in speedguide.net it shows 1451.

Even when i use the TCP optimizer to check my MTUchecker
I get those lines (doesnt matter what url i try it on)

"Pinging [192.117.172.16] with 32 bytes ->bytes=32 time=18ms TTL=253
Pinging [192.117.172.16] with 750 bytes ->bytes=750 time=75ms TTL=253
Pinging [192.117.172.16] with 1125 bytes ->bytes=1125 time=104ms TTL=253
Pinging [192.117.172.16] with 1312 bytes ->bytes=1312 time=119ms TTL=253
Pinging [192.117.172.16] with 1406 bytes ->bytes=1406 time=127ms TTL=253
Pinging [192.117.172.16] with 1453 bytes ->Request Timed Out
Pinging [192.117.172.16] with 1453 bytes ->Request Timed Out
Pinging [192.117.172.16] with 1453 bytes ->Request Timed Out
Couldn't determine largest possible MTU due to packets being lost.
You might want to try a different URL"

Please Help,
Thanks
Amit Z
:rolleyes:

[amitz3]

I used this connection before and it work great MTU-1500 and all
this is the first time i use win98 and xp together.
And my system specs are

AMD Xp 1.8
512m DDR
Gf 3 ti 200 MSI
O/B network (realtek)

My ADSL is in always on mode my modem is speedtouch Alcatel

Thanks again

[briguy453]

are you using a roughter... if you are.. update your firmware.

[amitz3]

im not

[mnosteele52]

What OS are you running and is this a DSL PPPoE connection? Have you ever had or do you have AOL installed on your pc?:)

[amitz3]

Its WinXP pro
The funny thing it worked well at all the previos installs
And no im not using AOL,
And whats PPPoE?
And no i dont think im using it,
Sorry to be a noob

[amitz3]

BTW my modem is a router and i use a hub

[Spherion]

i have this problem too. i set my mtu = 1492(adsl-ppoe) but when check on the analyser page it show mtu = 1454.
any idea whats wrong here ? and how would i set mtu to 1492?

TCP properties for IP = Edited (Edited)
Browser/OS = Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)
Note: Read the FAQ if the above is not your IP address.

TCP options string = 020405860103030301010402

MTU = 1454
MTU is not fully optimized for broadband. Consider increasing your MTU to 1500 for better throughput.

MSS = 1414
Maximum useful data in each packet = 1414, which equals MSS.
MSS is not fully optimized for broadband (although it might work well for slower connections). Consider increasing your MTU value.

Default Receive Window (RWIN) = 520352
RWIN Scaling (RFC1323) = 3 bits
Unscaled Receive Window = 65044
RWIN is a multiple of MSS
Other values for RWIN that might work well with your current MTU/MSS:
260176 (MSS x 46 * scale factor of 4)
130088 (MSS x 46 * scale factor of 2)
65044 (MSS x 46)

bandwidth * delay product:
Your RcvWindow limits you to: 20814.08 kbps (2601.76 KBytes/s) @ 200ms
Your RcvWindow limits you to: 8325.632 kbps (1040.704 KBytes/s) @ 500ms

MTU Discovery (RFC1191) = ON

Time to live left = 49 hops
TTL value is ok.

Timestamps (RFC1323) = OFF

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349)= 00000000