Configure routes and default gateways for CentOS basic networks

Configure routes and default gateways for CentOS basic networks

1. View routes

Enter

netstat-r

Or

route

Command to view the active routes in the system

2. Add routes

(1) Input

routeadd-net192.168.0.0/16gw10.1.1.254

This method becomes invalid after the system is restarted. Add this row in rc. local;

(2) set the system default gateway in the/etc/sysconfig/network File

GATEWAY=192.168.0.1

(3) for a single NIC/etc/sysconfig/network-scripts/ifcfg-eth0 set their own different default gateway

GATEWAY=192.168.0.1

(4) set multiple routing networks for a single NIC/etc/sysconfig/network-scripts/eth0.route

ADDRESS0=192.168.0.0NETMASK0=255.255.0.0GATEWAY0=10.1.1.254ADDRESS1=172.16.0.0NETMASK1=255.240.0.0GATEWAY1=10.1.1.254

Changes to files take effect,

Method (2) restart the system network service

servicenetworkrestart

Method (3) (4) restart a single Nic.

ifdowneth0&&ifupeth0