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, [[email protected] ~]# route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 172.16.0.0 0.0.0.0 255.255.0.0 U 100 0 0 enp2s0f0 172.16.0.0 0.0.0.0 255.255.0.0 U 101 0 0 enp2s0f1 [[email protected] ~]# 可以看到,所有数据都是通过enp2s0f0网口 [[email protected] ~]# 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 [[email protected] ~]# 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: [[email protected] ~]# ping 172.16.16.20 PING 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 ms 64 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 999ms rtt min/avg/max/mdev = 0.059/0.060/0.062/0.007 ms [[email protected] ~]# 问题解决!
时间: 2024-09-29 19:42:56