heinz57
06-04-01, 09:47 PM
Topic: MSS + MTU down by [6] on nt5 aDSL_PB
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1,333.3 down 112 up (aways) so far. no down time
Could not get my MSS up till I swiched to Me.
Low by {6] on 2000 same on 98se.
On ME I installed EnterNet300 v1.5
Fixed .inf files before install.
Patchs and ajusted REG.I got MSS=1452 MTU=1492
I should start a post on all the steps.
Check it out at 18,480 Feet from (CO) not bad !
TCP options string = 020405ac0103030301010402
MTU = 1492
MTU seems to be optimized for PPPoE...
MSS = 1452
Maximum useful data in each packet=1452,which is equal to MSS.
MSS is optimized for PPPoE.
Default Receive Window (RWIN) = 511104
RWIN Scaling (RFC1323) = 3 bits
Unscaled Receive Window = 63888
RWIN is a multiple of MSS
Other values for RWIN that might work well with your current MTU/MSS:
255552 (MSS x 44 * scale factor of 4)
127776 (MSS x 44 * scale factor of 2)
63888 (MSS x 44)
bandwidth * delay product:
Your RcvWindow limits you to: 20444.16 kbps (2555.52 KBytes/s) @ 200ms
Your RcvWindow limits you to: 8177.664 kbps (1022.208 KBytes/s) @ 500ms
MTU Discovery (RFC1191) = ON
Time to live left = 44 hops
TTL value is ok.
Timestamps (RFC1323) = OFF
Selective Acknowledgements (RFC2018) = ON
IP type of service field (RFC1349)= 00000000
xWinFire 384k ANY other DSL service is better !
[ I am on nt5 same fixes but only getting MSS=1446 MTU=1486.]
May be that PB allows Me to be right But win2k to be lower [-6]
Anyone runing nt5 EnterNet_1.5 aDSL 1.5m AMD 800 512m
who had same problem. Any REG. fix I missed HELP !
ASI wants to know what the fix turns out to be.
[Any help?] Thank You Much
--------------------------------------------------------------------------------
1,333.3 down 112 up (aways) so far. no down time
Could not get my MSS up till I swiched to Me.
Low by {6] on 2000 same on 98se.
On ME I installed EnterNet300 v1.5
Fixed .inf files before install.
Patchs and ajusted REG.I got MSS=1452 MTU=1492
I should start a post on all the steps.
Check it out at 18,480 Feet from (CO) not bad !
TCP options string = 020405ac0103030301010402
MTU = 1492
MTU seems to be optimized for PPPoE...
MSS = 1452
Maximum useful data in each packet=1452,which is equal to MSS.
MSS is optimized for PPPoE.
Default Receive Window (RWIN) = 511104
RWIN Scaling (RFC1323) = 3 bits
Unscaled Receive Window = 63888
RWIN is a multiple of MSS
Other values for RWIN that might work well with your current MTU/MSS:
255552 (MSS x 44 * scale factor of 4)
127776 (MSS x 44 * scale factor of 2)
63888 (MSS x 44)
bandwidth * delay product:
Your RcvWindow limits you to: 20444.16 kbps (2555.52 KBytes/s) @ 200ms
Your RcvWindow limits you to: 8177.664 kbps (1022.208 KBytes/s) @ 500ms
MTU Discovery (RFC1191) = ON
Time to live left = 44 hops
TTL value is ok.
Timestamps (RFC1323) = OFF
Selective Acknowledgements (RFC2018) = ON
IP type of service field (RFC1349)= 00000000
xWinFire 384k ANY other DSL service is better !
[ I am on nt5 same fixes but only getting MSS=1446 MTU=1486.]
May be that PB allows Me to be right But win2k to be lower [-6]
Anyone runing nt5 EnterNet_1.5 aDSL 1.5m AMD 800 512m
who had same problem. Any REG. fix I missed HELP !
ASI wants to know what the fix turns out to be.
[Any help?] Thank You Much