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Linux 多网卡设置同一网段,引发的问题Server有两个网口,两个网口IP均为同一个网段网口1:172.16.18.102/16,通往公司局域网网口2:172.16.18.13/16,直接连接一个NAS服务器,NAS与上述两个IP也为同一个网段NAS服务器:172.16.16.20/16问题表现:按照上述连接,Server访问任何机器都好使,就是无法访问NAS服务器原理:路由表决策,[root@localhost ~]# route -nKernel IP routing tableDestination Gateway Genmask Flags Metric Ref Use Iface172.16.0.0 0.0.0.0 255.255.0.0 U 100 0 0 enp2s0f0172.16.0.0 0.0.0.0 255.255.0.0 U 101 0 0 enp2s0f1[root@localhost ~]#可以看到,所有数据都是通过enp2s0f0网口[root@localhost ~]# arp -an? (172.16.66.22) at 00:1f:c6:9c:a2:11 [ether] on enp2s0f0? (172.16.66.234) at f4:4d:30:0b:53:95 [ether] on enp2s0f0? (172.16.20.243) at 08:9e:01:24:7d:bd [ether] on enp2s0f0[root@localhost ~]# 解决办法,手动指定一条路由通过enp2s0f1网口访问172.16.16.20 route add -host 172.16.16.20 dev enp2s0f1测试:[root@localhost ~]# ping 172.16.16.20PING 172.16.16.20 (172.16.16.20) 56(84) bytes of data.64 bytes from 172.16.16.20: icmp_seq=1 ttl=64 time=0.062 ms64 bytes from 172.16.16.20: icmp_seq=2 ttl=64 time=0.059 ms^C--- 172.16.16.20 ping statistics ---2 packets transmitted, 2 received, 0% packet loss, time 999msrtt min/avg/max/mdev = 0.059/0.060/0.062/0.007 ms[root@localhost ~]# 问题解决!
转载于:https://blog.51cto.com/990487026/1969827