博客
关于我
路由表添加和删除
阅读量:773 次
发布时间:2019-03-24

本文共 2510 字,大约阅读时间需要 8 分钟。

Understanding the Routing Table Information

The routing table in Linux kernel is a crucial component for managing IP packet destinations. Below is a detailed explanation of each column in the routing table:

output item Explanation
Destination The target network or host address
Gateway The gateway (router) address. An asterisk (*) indicates that the destination is on the local network, so no gateway is needed
Genmask The network mask, which defines the range of IP addresses for which this route applies
Flags Route flags indicating the type and status of the route (e.g., U for active, H for host on interface)
Metric The cost metric of the route, which is typically used in routing protocols like RIP or OSPF
Ref The reference count of the route, which may be used for routing with certain algorithms
Use The number of active routes using this route
Iface The interface through which the route is used

Deleting Entries from the Routing Table

To delete an entry from the routing table, you can use the route -n command to view the current routes and then use route del with the appropriate parameters.

Example of Using route -n to View Routes

$ route -nKernel IP routing tableDestination     Gateway         Genmask         Flags Metric Ref    Use Iface0.0.0.0         192.168.2.1     0.0.0.0         UG    0      0        0 wlan00.0.0.0         192.168.1.1     0.0.0.0         UG    0      0        0 eth0192.168.1.0     *               255.255.255.0   U     0      0        0 eth0192.168.2.0     *               255.255.255.0   U     0      0        0 wlan0

Deleting Specific Routes

  • Delete the first route

    $ route del -net 0.0.0.0 gw 192.168.2.1 netmask 0.0.0.0 dev wlan0
  • Delete the second route

    $ route del -net 0.0.0.0 gw 192.168.1.1 netmask 0.0.0.0 dev eth0
  • Delete the third route

    $ route del -net 192.168.1.0 gw 0.0.0.0 netmask 255.255.255.0 dev eth0
  • Delete the fourth route

    $ route del -net 192.168.2.0 gw 0.0.0.0 netmask 255.255.255.0 dev wlan0
  • After running these commands, the routing table should reflect the deletions.

    Adding Entries to the Routing Table

    To add an entry to the routing table, you can use the route add command with the appropriate parameters. For example, to add a route for the wireless interface:

    $ route add-net 192.168.2.0 gw 0.0.0.0 netmask 255.255.255.0 dev wlan0 metric 0

    This command adds a route for the network 192.168.2.0 through the wireless interface (wlan0), with the gateway at 0.0.0.0 and a network mask of 255.255.255.0. The metric is set to 0 in this example.

    转载地址:http://btvkk.baihongyu.com/

    你可能感兴趣的文章
    Mysql全局优化参数
    查看>>
    MySQL全文索引实现简单版搜索引擎
    查看>>
    MySQL全面瓦解:安装部署与准备
    查看>>
    MySQL内存表使用技巧
    查看>>
    MySQL再叙(体系结构、存储引擎、索引、SQL执行过程)
    查看>>
    MySQL函数
    查看>>
    mysql函数汇总之数学函数
    查看>>
    mysql函数汇总之日期和时间函数
    查看>>
    mysql函数汇总之条件判断函数
    查看>>
    mysql函数汇总之系统信息函数
    查看>>
    MySQL函数简介
    查看>>
    mysql函数遍历json数组
    查看>>
    MySQL函数(转发)
    查看>>
    mysql分区表
    查看>>
    MySQL分层架构与运行机制详解
    查看>>
    mysql分库分表中间件简书_MySQL分库分表
    查看>>
    MySQL分库分表会带来哪些问题?分库分表问题
    查看>>
    MySQL分组函数
    查看>>
    MySQL分组查询
    查看>>
    Mysql分表后同结构不同名称表之间复制数据以及Update语句只更新日期加减不更改时间
    查看>>