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a¿ÉÒÔpingͨb£¬bÓÐʱ¿ÉÒÔpingͨa£¬ÓÐʱ²»ÐÐ,b¿ÉÒÔpingͨËùÓÐÖ÷»ú£¬³ýÁËa
a µÄ°æ±¾
# uname -a
Linux *******  2.4.21-50.ELsmp #1 SMP Tue May 8 17:18:29 EDT 2007 i686 i686 i386 GNU/Linux
bµÄ°æ±¾
# uname -a
Linux **********  2.6.18-164.el5 #1 SMP Thu Sep 3 02:16:47 EDT 2009 i686 i686 i386 GNU/Linux


a ping b
$ traceroute 172.24.2.21
traceroute to 172.24.2.21 (172.24.2.21), 30 hops max, 38 byte packets
1  172.24.2.21 (172.24.2.21)  0.231 ms  0.145 ms  0.214 ms

b ping a

[root@ytaccdb network-scripts]# traceroute 172.24.5.11
traceroute to 172.24.5.11 (172.24.5.11), 30 hops max, 40 byte packets
1  172.24.2.254 (172.24.2.254)  0.497 ms  0.418 ms  0.392 ms
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