Using single-arm routing to realize VLAN communication in Enterprise network

First, the basic knowledge:

1 type of VLAN:

1. Local VLAN: Members of the same VLAN are on a single switch;

2. End-to-end VLAN: Members of the same VLAN are dispersed to different switches;

2 The advantages of VLAN:

1, control the network broadcast storm

VLAN technology can be used to draw a switch port into a VLAN, and a VLAN broadcast storm will not affect the performance of other VLANs.

2. Ensure network security

A shared LAN is difficult to secure a network because it can access the network as long as the user inserts an active port. VLAN can limit the access of individual users, control the size and location of broadcast group, and even lock the MAC address of a device, so the VLAN can ensure the security of the network.

3. Simplifying Network management

Network administrators can easily manage the entire network with the help of VLAN technology. For example, if you need to build a workgroup network for a project that may be across the country or around the world, a network administrator can set up a few commands to create a VLAN network of the project within minutes, with its members using a VLAN network, as if using a local area network.

4. Cost reduction

Cost savings can be saved by costly network upgrade requirements, higher availability of existing bandwidth and uplink.

5, performance improvement

Dividing a second-tier planar network into multiple logical workgroups (broadcast domains) can reduce unnecessary traffic on your network and improve performance.

3) Port Type:

4 message acceptance and sending process of various ports:

A, access port mode diagram

1. The port receives the message processing way