LAN SDN hard core technology insider 18 beautiful new world

Yesterday we introduced how to realize two data centers to cross the WAN , Realize layer 2 interconnection . actually , In the campus network , It can also be done through EVPN+VXLAN To achieve this goal .

The model of multi Park networking is shown in the following figure ：

We compare the networking model of the data center ：

obviously , The difference is less DCI equipment , Interconnection lines are generally through WAN or Internet V**, Between the two parks .

Because the number of terminals in the park is generally much smaller than the number of virtual machines in large and medium-sized data centers , The gauge pressure of core equipment is not so great , We can divide the core of the park into two , Undertake both core and DCI Responsibility for ,

such , Between the two parks VXLAN Interworking , It can be like this model ：

such , Two campus networks can pass VXLAN Interconnected .

that , For multiple Campus Networks ？

Let's recall the picture at the beginning ——

Is it magic ？

As long as the various sites IP Can be up to , You can go through EVPN+VXLAN Realize the interconnection of the second tier ！

and , Through this technology , We can also make full use of the local transformation of the old network , Let the old campus network support SDN, Try not to replace key equipment .

Chairman Mao said , We should not only be good at destroying an old world , We should also build a new world .

As a network engineer , We should also be good at , On the basis of the old network , Build a new network .

Tomorrow, , Let's take a look at several models of campus network transformation .