添加主机路由后直连路由无法ping通

Question

一台服务器两个网卡enp3s0和enp4s0，分别配置192.168.211.20/24，gw192.168.211.1和192.168.205.207/24，无网关。发现开始用192.168.205.0网段的pc192.168.205.201无法ping通192.168.211.20，判断是反向路由检测问题。添加route add  -host  192.168.205.201/32 gw  192.168.211.1后，发现能够ping通211.20，但ping192.168.205.207缺显示无法访问目的主机？请问这是为啥？

 enp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether c4:00:ad:4f:17:61 brd ff:ff:ff:ff:ff:ff
    inet 192.168.211.25/24 brd 192.168.211.255 scope global enp3s0
       valid_lft forever preferred_lft forever
    inet6 fe80::c600:adff:fe4f:1761/64 scope link
       valid_lft forever preferred_lft forever
3: enp4s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether c4:00:ad:4f:17:62 brd ff:ff:ff:ff:ff:ff
    inet 192.168.205.207/24 brd 192.168.205.255 scope global enp4s0
       valid_lft forever preferred_lft forever
    inet6 2000::c600:adff:fe4f:1762/64 scope global dynamic mngtmpaddr noprefixroute
       valid_lft 2592000sec preferred_lft 604800sec

 

未添加主机路由前路由表如下：

worker@worker:~$ route  -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         192.168.211.1   0.0.0.0         UG    0      0        0 enp3s0
172.17.0.0      0.0.0.0         255.255.0.0     U     0      0        0 docker0
172.18.0.0      0.0.0.0         255.255.0.0     U     0      0        0 docker_gwbridge
192.168.205.0   0.0.0.0         255.255.255.0   U     0      0        0 enp4s0
192.168.211.0   0.0.0.0         255.255.255.0   U     0      0        0 enp3s0