andrixxx94
16-04-2011, 19:08
Ciao ragazzi,
Vorrei impostare il rwin ideale dato che sul sito SpeedGuide dice che il Rwin non è ottimizato.
Ho una 7 mega alice e questo è il mio speedtest( di solito il download si aggira quasi sempre sui 6.5 MB mentre il ping sui 55/50):
http://www.speedtest.net/result/1255203286.png
Il sito Speedguide riporta questi risultati:
TCP options string = 020405ac0103030201010402
MTU = 1492
MTU is optimized for PPoE DSL broadband. If not, consider raising MTU to 1500 for optimal throughput.
MSS = 1452
MSS is optimized for PPPoE DSL broadband. If not, consider raising your MTU value.
Default TCP Receive Window (RWIN) = 66792
RWIN Scaling (RFC1323) = 2 bits (scale factor: 2^2=4)
Unscaled TCP Receive Window = 16698
In Windows 7, unless "TCP/IP Auto-Tuning" is disabled, only the Current TCP Window is displayed. Use the SG Vista TCP/IP patch instead of the TCP Optimizer for automatic tweaking.
RWIN is not fully optimized (even though it is a comparatively large number). The unscaled RWIN value is lower than it should be. Also, RWIN being close to and above 65535 does not justify the header overhead of enabling TCP 1323 Options. You might want to use one of the recommended RWIN values below.
RWIN is a multiple of MSS
Other RWIN values that might work well with your current MTU/MSS:
63888 (up to 2 Mbit lines, depending on latency. MSS * 44)
127776 (1-5 Mbit lines, depending on latency. MSS * 44 * 2)
255552 (2-14 Mbit lines, depending on latency. MSS * 44 * 2^2)
511104 (8-30 Mbit lines, depending on latency. MSS * 44 * 2^3)
1022208 (25-60 Mbit lines depending on latency. MSS * 44 * 2^4)
bandwidth * delay product (Note this is not a speed test):
Your TCP Window limits you to: 2672 kbps (334 KBytes/s) @ 200ms
Your TCP Window limits you to: 1069 kbps (134 KBytes/s) @ 500ms
MTU Discovery (RFC1191) = ON
Time to live left = 111 hops
TTL value is ok.
Timestamps (RFC1323) = OFF
Selective Acknowledgements (RFC2018) = ON
IP type of service field (RFC1349) = 00000000 (0)
SpeedGuide.net TCP Analyzer Results »
Tested on: 04.16.2011 13:00
IP address: 95.238.xxx.xxx
Client OS: Windows 7
TCP options string: 020405ac0103030201010402
MSS: 1452
MTU: 1492
TCP Window: 66792 (multiple of MSS)
RWIN Scaling: 2 bits (2^2=4)
Unscaled RWIN : 16698
Recommended RWINs: 63888, 127776, 255552, 511104, 1022208
BDP limit (200ms): 2672kbps (334KBytes/s)
BDP limit (500ms): 1069kbps (134KBytes/s)
MTU Discovery: ON
TTL: 111
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)
sono idenciso tra questi programma tcp optimizer o dr.TCP.
Ho sempre usato il primo programma citato ma credo che mettendo la V su optimal e su modify all network adapter non mi sia cambiato nulla, ditemi voi.
Perciò vorrei provare quest'ultimo programma (dr.tcp) che leggendo varie discussioni dovrebbe essere settato con questi valori:
•TCP Receive Window: ( da trovare )
•Window scaling: default
•Time stamping: no
•Selective Acks: 3
•MTU: valore scelto
•Path MTU discovery: yes
•Black hole detection: no
•Max duplicate Acks: 3
•TTL: 64
Fatemi sapere, ringrazio tutti per le risposte
Vorrei impostare il rwin ideale dato che sul sito SpeedGuide dice che il Rwin non è ottimizato.
Ho una 7 mega alice e questo è il mio speedtest( di solito il download si aggira quasi sempre sui 6.5 MB mentre il ping sui 55/50):
http://www.speedtest.net/result/1255203286.png
Il sito Speedguide riporta questi risultati:
TCP options string = 020405ac0103030201010402
MTU = 1492
MTU is optimized for PPoE DSL broadband. If not, consider raising MTU to 1500 for optimal throughput.
MSS = 1452
MSS is optimized for PPPoE DSL broadband. If not, consider raising your MTU value.
Default TCP Receive Window (RWIN) = 66792
RWIN Scaling (RFC1323) = 2 bits (scale factor: 2^2=4)
Unscaled TCP Receive Window = 16698
In Windows 7, unless "TCP/IP Auto-Tuning" is disabled, only the Current TCP Window is displayed. Use the SG Vista TCP/IP patch instead of the TCP Optimizer for automatic tweaking.
RWIN is not fully optimized (even though it is a comparatively large number). The unscaled RWIN value is lower than it should be. Also, RWIN being close to and above 65535 does not justify the header overhead of enabling TCP 1323 Options. You might want to use one of the recommended RWIN values below.
RWIN is a multiple of MSS
Other RWIN values that might work well with your current MTU/MSS:
63888 (up to 2 Mbit lines, depending on latency. MSS * 44)
127776 (1-5 Mbit lines, depending on latency. MSS * 44 * 2)
255552 (2-14 Mbit lines, depending on latency. MSS * 44 * 2^2)
511104 (8-30 Mbit lines, depending on latency. MSS * 44 * 2^3)
1022208 (25-60 Mbit lines depending on latency. MSS * 44 * 2^4)
bandwidth * delay product (Note this is not a speed test):
Your TCP Window limits you to: 2672 kbps (334 KBytes/s) @ 200ms
Your TCP Window limits you to: 1069 kbps (134 KBytes/s) @ 500ms
MTU Discovery (RFC1191) = ON
Time to live left = 111 hops
TTL value is ok.
Timestamps (RFC1323) = OFF
Selective Acknowledgements (RFC2018) = ON
IP type of service field (RFC1349) = 00000000 (0)
SpeedGuide.net TCP Analyzer Results »
Tested on: 04.16.2011 13:00
IP address: 95.238.xxx.xxx
Client OS: Windows 7
TCP options string: 020405ac0103030201010402
MSS: 1452
MTU: 1492
TCP Window: 66792 (multiple of MSS)
RWIN Scaling: 2 bits (2^2=4)
Unscaled RWIN : 16698
Recommended RWINs: 63888, 127776, 255552, 511104, 1022208
BDP limit (200ms): 2672kbps (334KBytes/s)
BDP limit (500ms): 1069kbps (134KBytes/s)
MTU Discovery: ON
TTL: 111
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)
sono idenciso tra questi programma tcp optimizer o dr.TCP.
Ho sempre usato il primo programma citato ma credo che mettendo la V su optimal e su modify all network adapter non mi sia cambiato nulla, ditemi voi.
Perciò vorrei provare quest'ultimo programma (dr.tcp) che leggendo varie discussioni dovrebbe essere settato con questi valori:
•TCP Receive Window: ( da trovare )
•Window scaling: default
•Time stamping: no
•Selective Acks: 3
•MTU: valore scelto
•Path MTU discovery: yes
•Black hole detection: no
•Max duplicate Acks: 3
•TTL: 64
Fatemi sapere, ringrazio tutti per le risposte