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This article mainly explains "how to add static routes to CentOS6.5". Interested friends may wish to have a look at it. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn how to add static routes to CentOS6.5.

CentOS add permanent static rout

When using dual network cards and two gateways at the same time, you need to add a static route. Of course, there are many times when it needs to be routed.

Operating system version centos-6.4 64bit

One: use the route command to add

1. The route added using the route command becomes invalid after the machine is rebooted or the network card is restarted. Method:

/ / routes added to the host

# route add-host 192.168.1.11 dev eth0

# route add-host 192.168.1.12 gw 192.168.1.1

/ / routes added to the network

# route add-net 192.168.1.11 netmask 255.255.255.0 dev eth0

# route add-net 192.168.1.11 netmask 255.255.255.0 gw 192.168.1.1

# route add-net 192.168.1.0 take 24 dev eth2

/ / add a default gateway

# route add default gw 192.168.2.1

/ / Delete a route

# route del-host 192.168.1.11 dev eth0

2. You can also use the ip command to add or delete routes

Ip route add default via 172.16.10.2 dev eth0

Ip route add 172.16.1.0/24 via 172.16.10.2 dev eth0

The format is as follows:

Ip route

Default via gateway dev interface

Ip/netmask via gateway dev interface

Second: the method of setting permanent route under linux:

1. Add to / etc/rc.local

Methods:

Route add-net 192.168.3.0 ax 24 dev eth0

Route add-net 192.168.2.0ax 24 gw 192.168.2.254

two。 Add to the end in / etc/sysconfig/network

Methods:

GATEWAY=gw-ip

Or

GATEWAY=gw-dev

3./etc/sysconfig/static-routes:

Any net 192.168.3.0/24 gw 192.168.3.254

Any net 10.250.228.128 netmask 255.255.255.192 gw 10.250.228.129

Adding routes to rc.local will cause the NFS not to mount automatically, so the method of using static-routes is the best. Both the restart of the system and service network restart will take effect.

Description of resolving NFS issues:

According to the order in which the linux starts, the contents of the rc.local are executed only after all the services of the linux are started, that is to say, the contents are executed after the netfs, that is, when the netfs starts, the static routes on the server are not added, so the netfs mount cannot succeed.

4. Add a route under / etc/sysconfig/network-script/route-interface (one file for each interface. If not, you can only add a route for that interface)

The format is as follows:

Network/prefix via gateway dev intf

For example, add a default gateway to eth0:

Vim / etc/sysconfig/network-scripts/route-eth0

# add the following (dev eth0 can be omitted)

0.0.0.0/0 via 172.16.10.2 dev eth0

Ps: notice that the mask here is 0 instead of 32, because this is a network segment, not a route.

After saving exit, service network restart.

Use route-n or netstat-r to view the routing table.

[root@localhost ~] # route-n

Kernel IP routing table

Destination Gateway Genmask Flags Metric Ref Use Iface

172.16.10.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0

192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr0

169.254.0.0 0.0.0.0 255.255.0.0 U 1002 00 eth0

0.0.0.0 172.16.10.2 0.0.0.0 UG 0 0 0 eth0

The default route has been added to the routing table.

Note that if you have two network cards, you need to set a default route to access the internet.

All methods of adding static routes have been verified on centos6.4 and are correct.

At this point, I believe you have a deeper understanding of "how to add static routes to CentOS6.5". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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