I. Cisco Fabric Extender Introduction
      Cisco Fabric Extender (FEX): switch matrix extender, the function provides scalable and extensible structure.

      With the soaring demand for user data services, the density of servers in the data center room is getting higher and higher, and new technology trends such as virtualization and cloud computing are becoming more and more popular, which makes the network ports corresponding to servers increase greatly and increase the complexity of management, and in addition, the convergence of Ethernet (LAN) and fiber-optic storage area networks (SANs) is becoming more and more common, which inevitably requires a new network topology with its This inevitably requires a new network topology. With the advent of cloud computing, this distributed architecture is highly scalable and requires an increasing number of servers. For example, the new Apache Hadoop 0.23 supports 6,000 to 10,000 servers in a cluster. The massive number of servers requires full use of the data center cabinet space, and at the same time, the massive amount of business data also requires faster and more direct high-performance links to send the data to the network core. Under such a trend, FEX will effectively solve the problems of TOR and EOR, TOR-reduce the number of management devices in the LAN, EOR-reduce the trouble of cabling.
      II. Environment Setup
      2.1 Cisco N2K switch 1 unit;
      2.2 1 Cisco N5K switch;
      2.3 10G rate, 3-meter cable, 1pcs, using Motel Optronics product model DAC-SFP10-P-M-30AWG-003.00M;

Environment setup

Figure 1 Environment setup

      III. Configure FEX function
      Create fex, with the number of configured ports to use:
   
  Switch N5k # configure terminal
      Switch N5k # fex 100
   Create fex 100 (range 100-199)
   
  Switch N5k # pinning max-links 1 Configure the number of ports to be used (in the range of 1-4, 1 means 48 ports are used, 2 means 24 ports are used, 3 means 16 ports are used, and 4 means 12 ports are used)
      Port Configuration:
      
Switch N5k # interface terminal
      Switch N5k(config)# switchport ethernet 1/1

      Switch N5k(config-if) # switchport mode fex-fabric   Configure the port mode to fex-fabric
      
Switch N5k(config-if) # fex associate 100   Assign port to fex 100
      View the configuration:

Viewing the Configuration

Figure 2 Viewing the Configuration

      View the switch status:
      Identifying and Connecting Status

Identify and Connect Status

Figure 3 Identify and Connect Status

      After configuration, you can view the ports of N2K on N5K.

Viewing the N2K ports on the N5K

Figure 4 Viewing the N2K ports on the N5K

      IV. Traffic Verification Test
      Traffic test is conducted for 20 minutes, the test result is no error code, proving that the 10G copper cable of MOTEK can be perfectly compatible with Cisco's Fabric Extender, and other 10G optical modules of MOTEK can also be used in the above application scenarios.

Experimental environment of traffic verification test

Figure 5 Experimental environment of traffic verification test

Traffic Verification Test Result

Figure 6 Traffic Verification Test Result

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