data center failover design

native vlan id for a trunk port. the native vlan id is the VLAN that carries untagged traffic on trunk ports. If the untagged packet is allowed and can be set to the native vlan id, the following problem occurs: an access port with a tag of 10, it thinks that the packets from this port should not contain tags, but all of them belong to VLAN 10. As a result, a package of tag 20 is included, access Port considers this packet to belong to VLAN 10, so it finds port forwarding of VLAN 10. At this t

The cabling system consists of two types: "field" and "well. The "field" is more suitable for the layout of the ring data center, and the "well" is more suitable for the layout of the vertical and horizontal data center. Its location can be arranged under the floor and under the ceiling, each with its own characteristi

Data Center reconstruction-Layer 7 package diagram, reconstruction of Layer 7 Package Diagram The typical three-tier Data Center reconstruction is changed to seven, with the appearance layer, factory layer, and IDAL layer added. The three layers added are the application of the appearance pattern in the

servers. The main reason is that traditional servers are a shared host, therefore, different users have different permissions, which leads to security risks. When server hosting occurs, the server is in the use status of an independent host, therefore, you can set permissions by yourself. Therefore, its security performance is guaranteed, which is conducive to more work. Network (ipbnet Inc .) is China's leading IDC hosting service provider. Its main services include host hosting, Cabinet lea

problem is to VLANs are divided into two groups, one set of VLANs to dc2-n7k-3 both STP root GW, and the other to dc2-n7k-4 as STP root GW, which makes it possible to use the resources of the network more fully. The disadvantage is that the design and configuration are relatively complex. Experimental topology:650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M01/71/7D/wKiom1XRqdHDtxzfAAR0YL_4iYE372.jpg "title=" 4.png " alt= "Wkiom1xrqdhdtxzfa

, the optimal access speed can also be achieved between carriers.2. Because the BGP protocol has the characteristics of redundant backup and loop elimination, it can reflect the mutual backup function when network servers encounter problems. At the same time, it can automatically switch to other lines, so as not to affect normal user access.3. BGP server leasing also has good scalability, integration performance, and security performance, which can achieve interconnection with other carriers, so

software to help monitor, record, and manage the entire communication infrastructure. This solution is continuously monitored, verifies each port connection, and records it in a central database, which can immediately issue a warning when any change occurs. The deployment of the IPatch system provides faster response time and higher network security. At the same time, through the integration of work instruction and service provision, workflow processing, automatic routing, and other auxiliary t

on servers. The main reason is that traditional servers are a shared host, therefore, different users have different permissions, which leads to security risks. When server hosting occurs, the server is in the use status of an independent host, therefore, you can set permissions by yourself. Therefore, its security performance is guaranteed, which is conducive to more work. network access (ipbnet Inc .) is China's leading IDC hosting service provider. Its main services include host hosting, Ca

When writing the data room student registration function, I encountered some minor problems. Just like the "Sparrow is small and dirty", although the problem is small, I don't have to fully understand its logical process, the following is a summary to facilitate future use and further study. First, let's take a look at the student registration process: when you enter the card number, you can search for it to determine whether the card number exists, a

data analysis. Some enterprises often encounter problems with poorly designed data warehouses because of their large daily data volume. data can only be provided 1-3 days later. Obviously, this is not acceptable.2. Data quality. Customers should look at various types of con

company implementation of Big data platform is also understandable, so also actively participate in this project. Just before the end of the research on OSGi's enterprise-class framework, we wanted to use the CSDN platform to document this big data platform implementation process. I think I will be able to provide a good reference for other individuals or companies with similar ideas!First, the overall arc

High-availability network system design for data centers The data center has many fault types, but the results are similar. That is, the device, link, or server in the data center fails and cannot provide normal services external

Previously, when I was studying and writing documents about the data center charging system, I wrote this article about the concept design model ERTU of the data center Charging System database. Now I am in the reconstruction phase of the individual version of the

Design and Implementation of cloud computing-based university data centers At present, the application and development of Informatization Construction in military colleges puts forward new demands for further enhancing the capability of basic network platform Service Assurance teaching. Compared with the traditional IT architecture, "cloud computing" represents the development direction of the network serv

Software Design of wireless data collection system for SimpliciTI network protocol The software consists of three parts: Control Center, terminal node, and route node software. 1 Control Center The control center constantly monitors how many node devices are added and determ

recovery 2289.2 impact of read-only tablespace on Database startup and shutdown 2319.3 read-only tablespace can prevent accidental deletion and modification of Data 2379.4 read-only tablespace makes it easier to manage tablespaces 240Chapter 1 Analysis of database objects 10th10.1 CBO and RBO 24610.2 Analysis and Dynamic sampling 25110.3 object analysis frequency 25410.3.1 data will not be changed by 255 a

difficulty;???????????? Cons: Inconsistent data on a regular basis, long time to recover data;???????? Hot backup:???????????? Online backup, providing better high availability;???????????? Asynchronous Hot Backup:???????????????? Writes from the primary store are returned to the application side, and the storage system writes to the other replicas asynchronously;???????????? Synchronous Hot Backup:???????

First, what is the database design Database Design ConceptsDatabase design is based on the specific needs of the business system, combined with the selected DBMS, for this business system to construct an optimal data storage model. and establish the structure of the table in the database, as well as the relati

screen is small, an important data is displayed on a single page, how to design it? Choosing a circle at this point will be a good choice, as it forms a visual center in the page. Whether it's a pie chart, a doughnut chart, or a radar map with a visual center, you'll have a visual focus on the page. A single

Cabling slot design in data centers In the data center, all devices are interconnected through optical fiber cables or cables. Therefore, when you enter the data center, you will see various cables connected to different devices.