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This article mainly explains "the configuration and implementation of Linux testing tool route". Interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Next, let the editor take you to learn the configuration and implementation of the Linux testing tool route.

This paper introduces the Linux testing tool for managing the network performance of Linux system, and mainly introduces the use and realizable functions of three network management testing tools: route, netstat and tcpdump.

When you configure a network, you specify for the machine the path that the packet will take when it is received. In Linux systems, provide a command route that sets a static route for the network card configured by the ifconfig command. This setup is usually introduced in / etc/rc.d/rc.inet1 and occurs when the system boots.

We use several examples to illustrate how to use the Linux test tool route command:

Route add-net 127.0.0.0

This command adds a route to the routing table for the specified address or network. Notice that the network is a Class An address, the mask is set to 255.0.0.0, and this newly added entry is connected to the lo device.

Route add-net xxx.xxx.xxx.xxx netmask 255.255.255.0 dev eth0

This command adds a route to the host whose IP address is xxx.xxx.xxx.xxx, and its network mask is set to 255.255.255.0.

Route del-net xxx.xxx.xxx.xxx

This command removes the route for the xxx.xxx.xxx.xxx network.

The routing information of the whole network can also be easily managed by using the Linux test tool route command, and the output result is the routing table of the network. As follows:

[root@lee / root] # route

Kernel IP routing table

Destination Gateway Genmask Flags Metric Ref Use Iface

10.10.8.224 * 255.255.255.255 UH 0 0 eth0

10.10.8.0 * 255.255.255.0 U 000 eth0

127.0.0.0 * 255.0.0.0 U 000 lo

Default dgc8.njupt.edu 0.0.0.0 UG 0 0 0 eth0

Default dgc8.njupt.edu 0.0.0.0 UG 1 0 0 eth0

[root@lee / root] #

The meaning of each field in the output result is:

Destination represents the destination IP address of the route.

Gateway indicates the hostname or IP address used by the gateway. The "*" output above indicates that there is no gateway.

Genmask represents the network mask of the route. In order to set up the route by bit-by-bit "and" operation, it is necessary to send it to the   to send the enmask and the IP address of the packet to the .

Flags is a flag that indicates a route. The available flags and their meanings are: U indicates that the route is starting, H indicates that the target is a host, G indicates to use the gateway, R indicates to reset the dynamic route, D indicates to dynamically install the route, and M indicates to modify the route! Indicates that the route is rejected.

Metric represents the unit sales volume of the route.

Ref indicates the number of other routes that depend on the status quo of this route.

Use represents the number of routing table entries that are used.

Iface represents the destination network of the packet sent by the route.

By looking at these output information, we can easily manage the routing table of the network.

At this point, I believe you have a deeper understanding of the "configuration and implementation of Linux testing tool route". 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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