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以下都是在XP操作系统下操作的
8 L/ N) v' T' F/ d8 Z5 b. X6 r1.选择系统自带的拨号软件(尽量不要安装其他的拨号及加速软件) $ k" w8 l# }4 H6 O( I
2.拨号进行连接后,点 "开始" --> "运行" ,在"打开栏"输入cmd,回车,进入DOS窗口;
/ D; f6 F6 k2 ?3.在光标闪烁处输 ipconfig/all
9 F- O6 ]9 w" q4 W) n4.回车,在 PPP adapter adsl 段落(最后一段落)中找到 DNS serves一行后面的数字为DNS的地址,模式如 202.101.224.* , E+ g. ~3 l, f; \ p
5.记下此DNS的地址 . Z/ D! }6 ~4 D
6.在光标闪烁处输入 ping -f -l 14** 202.101.224.* 6 `) y f* d4 w2 B5 g
14** 为你传输给当地DNS 的数据大小 ,取值一般在1450 ---1464 之间
# c* ^6 y% F, j. l1 e3 r 202.101.224.* 就是刚才记录下的DNS 地址
( w/ \9 E5 x3 v9 r7.如选1457,DNS 为 202.101.224.69 则格式为 ' H3 @$ O. B2 N) h
ping -f -l 1457 202.101.224.69
5 p+ W( _2 F0 @9 w. q; x" [回车
# S) Z4 d, j1 N% k+ i2 T若返回的是
7 c6 C* @* T; m5 F8 g1 u2 {! ppacket needs to be fragmented but DF set .
0 P' N, l. @8 E+ ^- [表明1457 数据过大,就将1457 改为1456 再试,还不行 改为1455 .... J c* t, d& o- y* {( R+ x$ D
直到返回数据为 1 t* O9 g6 m6 w$ J8 U7 B
reply from 202.101.224.69:bytes=14** time = 59 ms ttl = 251
9 X6 x- p9 A2 Q9 G类字样,才说明你输入的数据不会在传输及接受时不会产生碎片
) g4 j0 M% |) S* T/ r(注意此数据应取能返回reply ***** 的最大值,也就是返回的倒数第4行的末尾有 lost = 0 的字样) - T5 x* m3 P' z( l
8.记下此数据,那ADSL 供应商提供给我们的Maxmtu = 14** + 28 9 \0 K, i3 d! H% _- o# ~0 B
如九江的为1452数据 能不产生碎片,那九江电信的ADSL 用户的 Maxmtu = ) q9 Y i q3 W2 O) a
1452 + 28 = 1480 5 S2 ]8 g7 r" _' r; J S
而不是系统默认的 1500 ,和有些优化软件标称的 1492 r9 u, r& I2 J6 v+ R( S9 Y
新建一记事本,将下面的复制到记事本,将记事本命名为adslrg.txt
+ L8 f5 u7 M+ K0 @& V1 H. Z" g[Version]
% c) {7 h% h1 _& }1 m/ tsignature=$CHICAGO$
% k Q! ^# N5 k* Q/ K/ I- I8 f! o1 | v
[DefaultInstall]
2 M3 D$ K* Z1 G& q6 r% X6 EDelReg=Delete_Old_Tweaks
9 b6 S: z( B% F: o: G3 r9 PAddReg=Add_SpeedGuide_Tweaks
" m0 n$ x* @0 C
' M% b1 W. P$ m& M5 q[Delete_Old_Tweaks]
' d. _9 q7 H) L2 [2 u' lHKLM,SystemCurrentControlSetServicesVxDMSTCP,DefaultRcvWindow % }: q% O. X/ f |' |. ?, g
HKLM,SystemCurrentControlSetServicesVxDMSTCP,DefaultTTL
4 r; O; w4 F) w$ A( r0 r$ H# wHKLM,SystemCurrentControlSetServicesVxDMSTCP,PMTUDiscovery 7 N" \5 K7 [) i7 d6 c' ^
HKLM,SystemCurrentControlSetServicesVxDMSTCP,PMTUBlackHoleDetect # h% F9 {" c3 {
HKLM,SystemCurrentControlSetServicesVxDMSTCPParameters,Tcp1323Opts + V4 G" ~$ `0 D, u3 w% d! c
HKLM,SystemCurrentControlSetServicesVxDMSTCP,Tcp1323Opts
4 Y3 W0 p9 W. l9 I" f. EHKLM,SystemCurrentControlSetServicesVxDMSTCPParameters,SackOpts $ e7 S5 L; y9 Z2 u2 f. n
HKLM,SystemCurrentControlSetServicesVxDMSTCP,SackOpts
5 b% T: \: [/ J% G& W8 I4 c1 }HKLM,SystemCurrentControlSetServicesVxDMSTCPParameters,MaxDupAcks 4 _8 A9 d* p2 [# E' f. V
HKLM,SystemCurrentControlSetServicesClassNetTrans000,MaxMTU
& S( {6 v* }5 o JHKLM,SystemCurrentControlSetServicesClassNetTrans001,MaxMTU 7 G& G4 J( C% r8 C
HKLM,SystemCurrentControlSetServicesClassNetTrans002,MaxMTU
8 z: R' u# q( G- e! VHKLM,SystemCurrentControlSetServicesClassNetTrans003,MaxMTU
7 F; S, M- b) |; B. K ]HKLM,SystemCurrentControlSetServicesClassNetTrans004,MaxMTU
) `9 _) ~4 ?8 V: UHKLM,SystemCurrentControlSetServicesClassNetTrans005,MaxMTU 3 g) y7 P: A9 v! r4 u7 p
HKLM,SystemCurrentControlSetServicesClassNetTrans006,MaxMTU
" v& q4 {- G! J) ], F3 ^3 n9 B. BHKLM,SystemCurrentControlSetServicesClassNetTrans007,MaxMTU
) n6 P; f3 u8 KHKLM,SystemCurrentControlSetServicesClassNetTrans008,MaxMTU 1 x! y1 J7 S9 l+ ~/ _5 Q1 x
HKLM,SystemCurrentControlSetServicesClassNetTrans009,MaxMTU 7 Y1 O0 `2 W8 C# n& }" w$ f# J. ^
HKLM,SystemCurrentControlSetServicesICSharingSettingsGeneral,InternetMTU
! Q# j7 X {: x7 {) Y' }8 D. |% a% T9 ?: O' S! p) A1 j
[Add_SpeedGuide_Tweaks] + w3 p4 w' g% ?) e
HKLM,SystemCurrentControlSetServicesVxDMSTCP,DefaultRcvWindow,0,"255552" 7 c; H# i3 U3 D8 n3 K" ]
HKLM,SystemCurrentControlSetServicesVxDMSTCP,DefaultTTL,0,"64" ! X" Y& _- m1 J, [6 x' Y. y, D
HKLM,SystemCurrentControlSetServicesVxDMSTCP,PMTUDiscovery,0,"1"
( a0 Y4 m3 A, E2 mHKLM,SystemCurrentControlSetServicesVxDMSTCP,PMTUBlackHoleDetect,0,"0" 7 S. K: Z# O& J! P {' d
HKLM,SystemCurrentControlSetServicesVxDMSTCP,Tcp1323Opts,0,"1" 9 ~# D* U/ S" @5 H4 [/ ^4 ]& h& e9 Z8 i
HKLM,SystemCurrentControlSetServicesVxDMSTCP,SackOpts,0,"1" 6 b5 E. ^' o f1 B
HKLM,SystemCurrentControlSetServicesVxDMSTCPParameters,MaxDupAcks,0x10001,"3" - D: V5 t( q& _6 I& n3 v4 J
HKLM,SystemCurrentControlSetServicesClassNetTrans000,MaxMTU,0,"1480" 2 o- _7 t# U. n& y; o! q. V- K' B
HKLM,SystemCurrentControlSetServicesClassNetTrans001,MaxMTU,0,"1480" ) L" `9 ]0 X; t* G+ m
HKLM,SystemCurrentControlSetServicesClassNetTrans002,MaxMTU,0,"1480" $ M t I7 e2 w6 n) g' N* ?: n
HKLM,SystemCurrentControlSetServicesClassNetTrans003,MaxMTU,0,"1480" 7 ^3 b3 P! _$ h1 r
HKLM,SystemCurrentControlSetServicesClassNetTrans004,MaxMTU,0,"1480" ) Z) h7 k! Z% _- U% ~" a# a
HKLM,SystemCurrentControlSetServicesClassNetTrans005,MaxMTU,0,"1480" ! I/ d4 J$ G1 e+ Q6 h0 H1 c
HKLM,SystemCurrentControlSetServicesClassNetTrans006,MaxMTU,0,"1480" # q8 A% P: U) S# D' e, x8 d' u
HKLM,SystemCurrentControlSetServicesClassNetTrans007,MaxMTU,0,"1480"
% H9 t/ m9 L# j9 Y2 n" t `# cHKLM,SystemCurrentControlSetServicesClassNetTrans008,MaxMTU,0,"1480" * b% |6 M- W' X* J0 @% ` B m; q
HKLM,SystemCurrentControlSetServicesClassNetTrans009,MaxMTU,0,"1480"
* f0 g+ N4 w8 s
8 n" I" ^8 G# L( y" U! N0 w: u5 z _. s" |
# o+ [/ l5 Y+ i! o2 f其中在记事本中的1480 改为你测出的数值
+ }" L1 x6 [0 ^& X8 ~- `; m6 T保存后在记事本 文件菜单栏选择:另存为... 命名为adslrg.inf
+ f8 Y- X' ]8 U4 R' n用右键点击adslrg.inf 选择安装,
2 }7 B0 ]" n" Z& D3 w4 w" ?重新启动你的电脑 |
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发表于 2007-3-28 01:25:37