linux route没有默认路由解决

1.route看不到default路由，只有到本网段的的

root@datasrv network-scripts# route

Kernel IP routing table

Destination Gateway Genmask Flags Metric Ref Use Iface

192.168.81.0 0.0.0.0 255.255.255.0 U 100 0 0 p6p1

192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr0

2.添加默认路由

root@datasrv network-scripts# ip route add default via 192.168.81.1

3.查看添加的默认路由

root@datasrv network-scripts# route

Kernel IP routing table

Destination Gateway Genmask Flags Metric Ref Use Iface
default gateway 0.0.0.0 UG 0 0 0 p6p1

192.168.81.0 0.0.0.0 255.255.255.0 U 100 0 0 p6p1

192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr0