[Video] Big Layer 2 network technology analysis of data centers, Layer 2 of data centers

[Video] Big Layer 2 network technology analysis of data centers, Layer 2 of data centers

In the dual-Active Data Center solutionBusiness Clusters, storage, and networksCross-Data Center cluster capabilities are also achieved. With data center virtualization, dynamic migration of virtual machines requires that a virtual machine system be moved from one physical server to another when services on the virtual machine are running normally. This process is imperceptible to end users. When a site failure occurs in the virtual machine business system, the active-active business system must not affect normal use of users, automatic Service Cross-Site Automatic Switch is completed.

However, in a traditional L2 network, once the server is migrated to another L2 data centerChange IP address and MACThe operation status such as the address and TCP connection will also be interrupted, so the services carried by this server will be interrupted, and the associated business servers will also need to change the corresponding configuration, which has a huge impact. Therefore, you mustLarge L2 Network TechnologyTo solve this problem.

The large L2 network is designed to meet the specific requirement of dynamic migration of virtual machines after Virtualization of servers in the data center. Currently, the layer-2 network technology is complex, suchVxLAN, From HuaweiCSS, iStack, EVN, SVF, CiscoVSS, FEX, H3CIRF. Today we will share with you the implementation principles of VxLAN Technology (from: Huawei product materials ).

VXLAN features 1

VXLAN features 2

Use of traditional networks on Layer 3VLAN for broadcast isolationTo use a 12-bit Ethernet data frameVLAN IDs divide L2 Networks into multiple broadcast domains. The number of VLANs must be less than 4094.. However, with the popularization of virtualization, the maximum number of 4094 data entries is facing great pressure. In additionSpanning Tree Protocol (STP)Limits greatly limit the number of VLANs that can be used. VXLAN-based network virtualization solves many problems faced by traditional physical networks.

Technically speaking, it is also simple to say. The core problem of L2 Networks is the loop problem and the resulting broadcast storm.(Background, principles, and technical classificationsAndEVN and VxLAN technologies)For detailed parsing, please go throughOriginal article linkObtain details.

>>> Recommended reading

• What are the advantages of the storage as a service (STaaS) solution?

• What are the memories of the battlefield after the traditional enterprise storage fight?

Tip:
Search for "ict_effecect" or "scan" the QR code below to follow the public account for more highlights.

Focus on creating a technology sharing platform with feelings