默认网关设置.

第一生效文件

[root@openstack-ceph-01 ~]# grep -i gate /etc/sysconfig/network-scripts/ifcfg-eth0
GATEWAY=10.57.26.1

第二生效文件

[root@openstack-ceph-01 ~]# grep -i gate /etc/sysconfig/network
GATEWAY=10.57.26.1

第三：命令行有限，且临时生效

[root@openstack-ceph-01 ~]# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         10.57.26.1      0.0.0.0         UG    0      0        0 eth0
10.57.26.0      0.0.0.0         255.255.255.0   U     0      0        0 eth0
169.254.0.0     0.0.0.0         255.255.0.0     U     1002   0        0 eth0
169.254.0.0     0.0.0.0         255.255.0.0     U     1003   0        0 eth1
169.254.169.254 192.168.2.2     255.255.255.255 UGH   0      0        0 eth1
172.17.0.0      0.0.0.0         255.255.0.0     U     0      0        0 docker0
192.168.2.0     0.0.0.0         255.255.255.0   U     0      0        0 eth1

route add default gw 10.57.26.1 dev eth1

route del default gw 192.168.2.1 



route add 0.0.0.0 gw 10.57.26.1 netmask 0.0.0.0 dev eth1