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以下都是在XP操作系统下操作的 * b4 O! A; b4 p. C3 ^: D
1.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) ; ?: K2 S9 y) E) @* o
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; + P- M& [7 q+ {' D- F7 D/ ?6 W
3.在光标闪烁处输 ipconfig/all + Q" _2 [! E9 g$ O' a5 c6 M
4.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.* 1 k) ]2 c- Y4 |- _7 a |$ |
5.记下此DNS的地址 0 a, c$ [0 ^# a$ Q
6.在光标闪烁处输入 ping -f -l 14** 202.101.224.*
( q- A! k D5 A# m6 i4 X 14** 为你传输给当地DNS 的数据大小 ,取值一般在1450 ---1464 之间
/ C9 J7 W/ c7 i. O3 B# G* V* s' E 202.101.224.* 就是刚才记录下的DNS 地址 - t, p6 e# s$ q5 Q& Z
7.如选1457,DNS 为 202.101.224.69 则格式为
, H' i7 D. m2 j+ [ E+ i7 m. qping -f -l 1457 202.101.224.69 ~0 s& W/ _) P0 ~4 J
回车
1 }" `' I" v4 G8 W/ {若返回的是 8 p* Q) P/ p- R, ]
packet needs to be fragmented but DF set .
4 `# a2 t8 T+ I# M6 F; s* C. L表明1457 数据过大,就将1457 改为1456 再试,还不行 改为1455 .... 0 g5 g1 S/ Y* K/ l
直到返回数据为 / n& v) S6 A" _+ w6 \1 f9 U/ S
reply from 202.101.224.69:bytes=14** time = 59 ms ttl = 251 0 U4 `; X2 w' g% S2 C/ J
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 ! r" i* n/ a3 [5 Y& A
(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) ( X3 G3 u6 ^) J% x; |
8.记下此数据,那ADSL 供应商提供给我们的Maxmtu = 14** + 28 - d! z' }# [2 N/ w2 y
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 =
, U0 S- B4 x1 y$ j5 i; w# |) N& y' G1452 + 28 = 1480 # i! H P, l0 R. [# |. _/ `, B2 e, L
而不是系统默认的 1500 ,和有些优化软件标称的 1492 ' m. C( y, w8 r, Z# t! ]; e5 _
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
3 {% M, y0 s+ L$ v, \; y2 i( w[Version] % @! d7 x) S9 L; |
signature=$CHICAGO$
0 s6 Y9 v, q; P2 G; ?5 l3 U# b- L! z
[DefaultInstall]
2 P+ X$ a- Y/ D; i v) c8 JDelReg=Delete_Old_Tweaks
( Z2 H& E: j; d6 |9 O. yAddReg=Add_SpeedGuide_Tweaks
9 J; Y+ `1 y( V3 Z' H
' v, C5 _" r. }% K( v7 D) u[Delete_Old_Tweaks]
. a9 B( u- }" C. f9 o! |7 B, dHKLM,SystemCurrentControlSetServicesVxDMSTCP,DefaultRcvWindow 3 g6 J0 p' w8 ]6 @$ ]+ d
HKLM,SystemCurrentControlSetServicesVxDMSTCP,DefaultTTL 3 Q0 L5 c& D* b- S! }" `
HKLM,SystemCurrentControlSetServicesVxDMSTCP,PMTUDiscovery
. m3 S! K2 t/ c/ L5 n" [% W$ h2 [3 C4 IHKLM,SystemCurrentControlSetServicesVxDMSTCP,PMTUBlackHoleDetect
5 `, r$ k- \, g2 | p0 W5 |- aHKLM,SystemCurrentControlSetServicesVxDMSTCPParameters,Tcp1323Opts ; j/ L8 \5 t/ |" Z4 f. _
HKLM,SystemCurrentControlSetServicesVxDMSTCP,Tcp1323Opts 2 N; u: t/ ` `( T
HKLM,SystemCurrentControlSetServicesVxDMSTCPParameters,SackOpts % T# }, o/ I8 n# _) h& W$ ?/ @: @
HKLM,SystemCurrentControlSetServicesVxDMSTCP,SackOpts 2 h" f) u4 o# n8 ]
HKLM,SystemCurrentControlSetServicesVxDMSTCPParameters,MaxDupAcks
) C F" H+ J& c& nHKLM,SystemCurrentControlSetServicesClassNetTrans000,MaxMTU
2 i# r7 P8 @% d# N) G: yHKLM,SystemCurrentControlSetServicesClassNetTrans001,MaxMTU
0 L5 b* U' i2 `% H9 ]/ P( GHKLM,SystemCurrentControlSetServicesClassNetTrans002,MaxMTU
( \$ s0 @1 }2 W! Y3 qHKLM,SystemCurrentControlSetServicesClassNetTrans003,MaxMTU
) ^9 b7 E0 g& e$ w& WHKLM,SystemCurrentControlSetServicesClassNetTrans004,MaxMTU 6 u: B' U @* d, o3 m+ |* o
HKLM,SystemCurrentControlSetServicesClassNetTrans005,MaxMTU
1 r! v& f' O- i4 K. e/ ]HKLM,SystemCurrentControlSetServicesClassNetTrans006,MaxMTU
4 n# `5 {* K6 h6 N/ B& h3 DHKLM,SystemCurrentControlSetServicesClassNetTrans007,MaxMTU
0 ?8 ^8 J& k: \/ d( L' |: `HKLM,SystemCurrentControlSetServicesClassNetTrans008,MaxMTU
" `0 H: T7 F- j4 C0 R- l K8 ?HKLM,SystemCurrentControlSetServicesClassNetTrans009,MaxMTU
& m, c8 {9 `3 t# x& g4 uHKLM,SystemCurrentControlSetServicesICSharingSettingsGeneral,InternetMTU
- B! E8 x8 i+ X- w4 q) c6 A) [- m5 s
[Add_SpeedGuide_Tweaks]
9 b7 }; e6 o; P: THKLM,SystemCurrentControlSetServicesVxDMSTCP,DefaultRcvWindow,0,"255552" . c; y+ `1 f0 Q7 }: U1 X: m: v
HKLM,SystemCurrentControlSetServicesVxDMSTCP,DefaultTTL,0,"64"
2 y* B# P8 T# r% `HKLM,SystemCurrentControlSetServicesVxDMSTCP,PMTUDiscovery,0,"1"
1 N* M8 Q- h. Q. [% d$ [HKLM,SystemCurrentControlSetServicesVxDMSTCP,PMTUBlackHoleDetect,0,"0" # C- J0 x. ^8 y2 [5 ^ w
HKLM,SystemCurrentControlSetServicesVxDMSTCP,Tcp1323Opts,0,"1"
- E2 \! @! c) ?; [HKLM,SystemCurrentControlSetServicesVxDMSTCP,SackOpts,0,"1"
9 ]: ]2 j8 M, U5 |9 ?HKLM,SystemCurrentControlSetServicesVxDMSTCPParameters,MaxDupAcks,0x10001,"3"
+ S$ n! B. G! f4 E) o' a. WHKLM,SystemCurrentControlSetServicesClassNetTrans000,MaxMTU,0,"1480"
: X8 A( K. e" Z0 iHKLM,SystemCurrentControlSetServicesClassNetTrans001,MaxMTU,0,"1480"
- n1 k* C$ |4 q1 j% |HKLM,SystemCurrentControlSetServicesClassNetTrans002,MaxMTU,0,"1480"
1 q, r( x+ y" }HKLM,SystemCurrentControlSetServicesClassNetTrans003,MaxMTU,0,"1480"
$ M% S- `( L" w: a/ [4 P8 X2 {: HHKLM,SystemCurrentControlSetServicesClassNetTrans004,MaxMTU,0,"1480" . D5 d! L) H8 J
HKLM,SystemCurrentControlSetServicesClassNetTrans005,MaxMTU,0,"1480"
: x g: M+ T, e" H; v6 nHKLM,SystemCurrentControlSetServicesClassNetTrans006,MaxMTU,0,"1480" q7 F& T; W3 C
HKLM,SystemCurrentControlSetServicesClassNetTrans007,MaxMTU,0,"1480" 9 C: G7 R! B) }1 U r$ e9 [
HKLM,SystemCurrentControlSetServicesClassNetTrans008,MaxMTU,0,"1480" 1 T- L$ x" G% n; n4 X
HKLM,SystemCurrentControlSetServicesClassNetTrans009,MaxMTU,0,"1480"
1 n8 X( \! ]( K7 A, Q' w0 x, f% V) A0 P$ h6 D8 g+ g
! m! U% ~+ k w# ^
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其中在记事本中的1480 改为你测出的数值
4 v' a Q: t6 n保存后在记事本 文件菜单栏选择:另存为... 命名为adslrg.inf : z I/ S4 b! x
用右键点击adslrg.inf 选择安装, / a0 B) {& @0 M, C' S5 y7 ~% j4 x
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发表于 2007-3-28 01:25:37