Make static routing accessible to the whole network through ENSP

One 、 How routers work

How routers work ： When a packet is accepted by the router , The router will first check the packet destination ip Address ( The package target ip Shorthand for A）, Then check the local data table of the router . If the local data table has been previously sent to the target ip Address A The record of , Then the server accepts the packet and forwards it according to the record ; If there is nothing about the target in the local data table ip Address A The record of , The packet will be rejected by the server , That is, the server discards the packet .

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Two 、ensp Topology Environment Planning

In order to make static routing accessible throughout the network , Designed a ensp The network topology environment is convenient for everyone to understand .

The ensp Network topology environment ： Three routers 、 Three stations pc Main engine composition .

The topology environment is shown in the following figure

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3、 ... and 、 Router gateway port configuration

Normally , We need to give a gateway to each port of each router , It is convenient to realize data transmission in different broadcast domains .

For each router

AR1：

<Huawei>system-view 

[Huawei]interface g0/0/0

[Huawei-GigabitEthernet0/0/0]ip address 192.168.1.1

[Huawei-GigabitEthernet0/0/0]quit

[Huawei]interface g0/0/1

[Huawei-GigabitEthernet0/0/1]ip address 192.168.2.1

AR2:

<Huawei>system-view 

[Huawei]interface g0/0/0

[Huawei-GigabitEthernet0/0/0]ip address 192.168.2.2

[Huawei-GigabitEthernet0/0/0]quit

[Huawei]interface g0/0/1

[Huawei-GigabitEthernet0/0/1]ip address 192.168.3.1

[Huawei]interface g0/0/2

[Huawei-GigabitEthernet0/0/2]ip address 192.168.4.2

AR3:

<Huawei>system-view 

[Huawei]interface g0/0/0

[Huawei-GigabitEthernet0/0/0]ip address 192.168.5.1

[Huawei-GigabitEthernet0/0/0]quit

[Huawei]interface g0/0/1

[Huawei-GigabitEthernet0/0/1]ip address 192.168.4.1

In this way, each router port has a gateway belonging to the broadcast domain .

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Four 、 Manually add unknown network segments and PC in ipv4 Configuration of

For the newly configured router AR, There is no record of the next non directly connected broadcast domain , So we will be in AR Manually add the non direct network segment in the router data table , That is, unknown network segment .

With AR1 For example ,AR1 The data table is shown in the figure below

thus it can be seen , The AR1 Router data table does not 192.168.3.0、192.168.4.0 and 192.168.5.0 Network segment record , So we add these three network segments  .

To add 192.168.3.0 Network segment as an example ：

Input ：

[Huawei]ip route-static 192.168.3.0 24 192.168.2.2

192.168.3.0 For the unknown network segment you want to add ;

24 Mask for subnet , namely 255.255.255.0;

192.168.2.2 For the next entry interface of traffic ip Address （ Short for next jump ）;

At this time , We are already in AR1 Router data table added 192.168.3.0 This unknown network segment , We can check .

Input ：

[Huawei]display ip routing-table

stay Proto In this column , We can see a different English word Static, This line represents what we added 192.168.3.0 Network segment .

After inspection , Because there is no server allocation in this topology environment DHCP, To make static routing accessible throughout the network ,PC Terminal IPV4 Configuration should not be forgotten ;

With PC1 For example ：

IP Address ：192.168.1.2-192.168.1.254 All can ;

Subnet mask ：255.255.255.0/24;

gateway ：192.168.1.1（ The traffic finally leaves the end of the broadcast domain ip Address ）;

here , The port configuration of the router in this topology environment 、 Static configuration of router 、PC Terminal IPV4 The configuration is complete , We use each PC Terminal go ping Different broadcast domains PC Terminal ip, If each ping All actions can succeed , Then the static routing of this environment has achieved the whole network reachability ;

notes ： Need each PC Terminal go ping Through any broadcast domain PC terminal ip;

  As mentioned above , The topology environment realizes static routing, and the whole network can reach ;