为什么网络不可达，而同一子网内的另一个 IP 可达？
网络可达
[root@vcn03 ~]# ping -I eth0 -c 1 10.52.96.48
PING 10.52.96.48 (10.52.96.48) from 10.52.111.3 eth0: 56(84) bytes of data.
64 bytes from 10.52.96.48: icmp_seq=1 ttl=64 time=0.248 ms
--- 10.52.96.48 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.248/0.248/0.248/0.000 ms
[root@vcn03 ~]#
网络无法连接
[root@vcn03 ~]# ping -I eth0 -c 1 10.52.96.45
PING 10.52.96.45 (10.52.96.45) from 10.52.111.3 eth0: 56(84) bytes of data.
--- 10.52.96.45 ping statistics ---
1 packets transmitted, 0 received, 100% packet loss, time 0ms
[root@vcn03 ~]#
可达的机器 [10.52.96.48] 的路由表
$ route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
10.10.92.0 0.0.0.0 255.255.255.0 U 0 0 0 em4
10.52.96.0 0.0.0.0 255.255.240.0 U 0 0 0 em1
169.254.0.0 0.0.0.0 255.255.0.0 U 1002 0 0 em1
169.254.0.0 0.0.0.0 255.255.0.0 U 1005 0 0 em4
0.0.0.0 10.52.96.1 0.0.0.0 UG 0 0 0 em1
$
无法访问的机器 [10.52.96.45] 的路由表
$ route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
172.16.10.0 0.0.0.0 255.255.255.0 U 0 0 0 em2
10.52.96.0 0.0.0.0 255.255.248.0 U 0 0 0 bond0
10.52.96.0 0.0.0.0 255.255.248.0 U 0 0 0 em4
169.254.0.0 0.0.0.0 255.255.0.0 U 1003 0 0 em2
169.254.0.0 0.0.0.0 255.255.0.0 U 1005 0 0 em4
169.254.0.0 0.0.0.0 255.255.0.0 U 1006 0 0 bond0
0.0.0.0 10.52.96.1 0.0.0.0 UG 0 0 0 bond0
$