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4金币
一级路由器(WhiteYY):192.168.1.222一级子网 192.168.1.0/24
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* W' E0 V2 x) {. e$ x9 T二级路由器(BlueYY):192.168.99.1/192.168.1.199
$ f7 Z' \% i, D( T9 A) W% G0 f二级子网 192.168.99.0/24
( ~) a0 A; e2 V. F' R二级子网中PC: 192.168.99.119
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故障现象:从PC可以ping通WhiteYY,但是从WhiteYY无法ping通PC
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【诊断操作如下】
( Y+ ?; y5 l9 V; |0;BlueYY: /home/root[BlueYY /home/root]# ping 192.168.1.222 可以通
# B/ y) H) D) F' x! K: ?5 }PING 192.168.1.222 (192.168.1.222): 56 data bytes' L7 u+ G# h( x/ N" `9 L& p' Y
64 bytes from 192.168.1.222: seq=0 ttl=64 time=1.633 ms
: P( {3 \# ^% p$ E! n64 bytes from 192.168.1.222: seq=1 ttl=64 time=1.333 ms, G3 F4 W: T4 N1 c: h0 m$ l( c0 D
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: k9 N' f, m5 C. ?0;WhiteYY: /home/root[WhiteYY /home/root]# ping 192.168.99.1 可以通" D7 _8 k, u5 O Q: g
PING 192.168.99.1 (192.168.99.1): 56 data bytes
& p5 A0 B% C+ R; N ~3 I64 bytes from 192.168.99.1: seq=0 ttl=64 time=1.407 ms8 i" r t; Y8 l' s, T' n% F7 T; ]
64 bytes from 192.168.99.1: seq=1 ttl=64 time=2.176 ms2 j5 V9 {2 s+ T7 U; a1 z
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--- 192.168.99.1 ping statistics ---
, m3 M6 o ?& n: m$ u! m$ @% M2 packets transmitted, 2 packets received, 0% packet loss$ @9 f# u. M5 E2 h8 l
round-trip min/avg/max = 1.407/1.791/2.176 ms2 j: |0 F$ X& L$ W% y+ J
0;WhiteYY: /home/root[WhiteYY /home/root]# ping 192.168.99.119 不能通- A' i5 C2 T2 C. Y3 |7 I; V" x
PING 192.168.99.119 (192.168.99.119): 56 data bytes
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【路由表打印如下】% [8 [) {0 v4 v' `# F
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0;BlueYY: /home/root[BlueYY /home/root]# route2 y( W0 [0 f+ O/ f: ]% I( S+ s
Kernel IP routing table: l7 N. Z2 q. G
Destination Gateway Genmask Flags Metric Ref Use Iface
6 W$ ^1 ^; F, H {2 z \default 192.168.1.222 0.0.0.0 UG 1 0 0 apcli06 J, q: | y4 w( x" G2 F+ J/ p
127.0.0.0 * 255.0.0.0 U 0 0 0 lo
+ @; E6 K& }9 G. @0 i3 ^192.168.1.0 * 255.255.255.0 U 0 0 0 apcli0
1 r% l D- f8 x' ^* g0 E192.168.99.0 * 255.255.255.0 U 0 0 0 br0$ g7 f/ x; {/ c# B n
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0;WhiteYY: /home/root[WhiteYY /home/root]# route
1 r1 m" X, }: O5 I& q l: M ]3 z0 hKernel IP routing table2 X) p5 e8 F5 ^0 q5 D% k: f8 F' _% M' H
Destination Gateway Genmask Flags Metric Ref Use Iface" R; `% q8 Q( \/ B9 r$ d2 z
default 112.95.24.1 0.0.0.0 UG 1 0 0 ppp0/ p& x7 l2 ]7 Q5 O# Z" y
112.95.24.1 * 255.255.255.255 UH 0 0 0 ppp0! n$ [" Y# R' K4 U" Y
127.0.0.0 * 255.0.0.0 U 0 0 0 lo6 s+ A) R$ X2 J( t
192.168.1.0 * 255.255.255.0 U 0 0 0 br0
0 p: Z9 B1 V4 |, Z192.168.88.0 BlackYY 255.255.255.0 UG 0 0 0 br0. J" M( p. i: I) N- w5 l+ Y/ X2 M
192.168.99.0 BlueYY 255.255.255.0 UG 0 0 0 br0
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