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The following brings you how to use PVST to achieve network load balancing, hoping to give you some help in practical application. Load balancing involves more things, there are not many theories, and there are many books on the Internet. Today, we use the accumulated experience in the industry to do an answer.

PVST+1 supports ISL and IEEE802.1Q trunks 2 supports cisco proprietary stp extensions 3 adds BPDU protection and root defense enhancements 4 allows each VLAN to have its own root bridge network load balancing

Through some kind of load sharing technology, the requests sent from the outside are evenly distributed to a cloud server in the symmetrical structure, and the server that receives the request responds to the customer's request independently. Load balancing can evenly distribute customer requests to the server array, so as to provide rapid access to important data and solve a large number of concurrent access service problems.

5 STP states of switch port

STP protocol (spanning Tree Protocol) logically breaks the loop to prevent broadcast storms in layer 2 networks. When the line fails, the disconnected interface is activated to restore communication and act as a backup line.

The function of STP is to prune a bridge network with loops to a tree topology without loops by blocking redundant links.

Stateful purpose forwarding (forwarding) forwarding / receiving user data Learning (learning) Building Bridge Table listening (listening) Building "active" Topology blocking (blocking) receiving only BPDU disabling (disabled) forcing shutdown Experimental destination sw1 becomes the root bridge of vlan10 sw2 becomes the root bridge of vlan20 Experimental Analysis of configuring vlan for switch and configuring switch connection Port for TRUNK configuring vlan load balancing verifying stp Information experiment begins the experiment Draw the topology diagram needed for this experiment with GNS3 And mark the key information.

Set the three switch ports to trunk and select the encapsulation type as dot1qint range f1ap0-1 / / enter multiple consecutive interfaces switchport mode trunk// trunk link switchport trunk encapsulation dot1q// encapsulation type

Divide sw1 into vlan10 vlan20 and set vtp (if you find it troublesome, you can divide vlan directly on three switches, I use vtp here to consolidate knowledge points) vlan10, 20pm / partition vlan10 vlan20 vtp domain test//vtp name is testvtp mode server// server vtp version 2amp / version number is 2vtp pruning//vtp pruning

The vtp configuration of sw2 changes the server to the client, and the settings of sw2 and sw3 are the same. After the settings are completed, check the vlan information, and you can find that sw2 and sw3 have learned the vlan division of sw1 themselves.

Configure vlan load balancer

Sw1

Spanning-tree vlan10 / / vlan10-enabled spanning tree spanning-tree vlan10 root primary// specifies that sw1 is the root bridge of vlan10 spanning-tree vlan20 / / vlan20-enabled spanning tree spanning-tree vlan20 root secondary// specifies sw1 as the backup bridge of vlan show spanning-tree brief// query spanning tree information

Sw2

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Verify stp information

Read the above about how to use PVST to achieve network load balancing, if there is anything else you need to know, you can find what you are interested in in the industry information or find our professional and technical engineers to answer, technical engineers have more than ten years of experience in the industry.

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