Shulou(Shulou.com)06/01 Report--

Today, I will talk to you about how to analyze the function of Routing. Many people may not know much about it. In order to make you understand better, the editor has summarized the following contents for you. I hope you can get something according to this article.

Routing Service (Routing) provides interworking across subnet.

For example, we set up an experimental environment earlier:

Cirros-vm1 172.16.100.3 vlan100

Cirros-vm3 172.16.101.3 vlan101

The two instance must use router to communicate. It can be a physical router or a virtual router.

Physical router

Use the physical router, as shown in the following figure:

The physical router accessed has two interface ip:

172.16.100.1 corresponds to the gateway of vlan100.

172.16.101.1 corresponds to the gateway for vlan101.

When cirros-vm1 wants to communicate with cirros-vm3, the flow of packets is as follows:

1. Because the default gateway of cirros-vm1 points to 172.16.100.1, the data packet sent to cirros-vm3 first enters the physical router through the interface of vlan100.

2. If router discovers that the destination address 172.16.101.3 and 172.16.101.1 are the same vlan, it is sent from the interface of vlan101.

3. The packet finally arrives at cirros-vm3 after brq1d7040b8-01.

Virtual router

The routing mechanism of virtual router is the same as that of physical router, but is implemented by software.

Both Neutron schemes are supported.

If you want to use virtual router, you need to enable L3 agent.

L3 agent runs virtual router on the control node or network node to provide routing services for subnet.

After reading the above, do you have any further understanding of how to analyze the function of Routing? If you want to know more knowledge or related content, please follow the industry information channel, thank you for your support.

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