CISCO PT Simulation Experiment (5) port aggregation configuration for switches

Cisco PT Simulation Experiment (5) port aggregation configuration for switches

Experimental Purpose :

Understanding Port Aggregation Fundamentals

Master the configuration method of general switch port aggregation

Experimental Background : The company's finance department and the sales department of the PC through 2 switches to communicate frequently, in order to improve the bandwidth between links, to ensure the reliability of network communications, while providing link redundancy, to avoid link single point failure, thereby affecting the key nodes of the large area of the network, you can consider using port aggregation technology to achieve.

Technical Principle :

• Port/ link aggregation, which is the bundling of multiple physical ports on a switch into a logical port (called aggregate port), so that a large broadband link (etherchannel) is formed between the switches, and load balancing is also possible. and provides redundant links.

  • increase the link bandwidth, when there are multiple redundant links between the switches, because of the reason of spanning tree, the actual bandwidth still has only one physical link bandwidth, it is easy to form network bottleneck. With port aggregation, the bandwidth of a single logical link is the sum of all physical links.

  • Support load balancing, according to the message of the MAC address, IP address and other characteristics of the traffic evenly distributed to the member link, to avoid the single link flow saturation.

  • Provides a link backup that, when a member link disconnects, the traffic for that member link is automatically assigned to the other active member links.

  • Prevent network loops, broadcast or multiple broadcasts received by a member link in the AP, will not be forwarded to other member links.

• of the aggregation port and the aggregation function needs to be configured at both ends of the link to take effect.

  • After the port is aggregated into a separate logical port, configuration , the should be configured in aggregate port mode

Experimental Equipment : switch_2960 2 units, PC 4, straight line, crossover line.

Experimental topology :

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Experimental steps:

Network by topology and redundant links for switches

Select a numbered contiguous port to configure

Add successive multiport ports to the link group and turn on

Turn on the balanced load function for the aggregation link

PC settings 192.168.1.2        // pc0192.168.1.3        //pc1192.168.1.4         //pc2192.168.1.5        //pc3// Subnet mask and gateway 255.255.255.0192.168.1.1 

switch0 and Switch1 configuration Switch>enswitch#conf tswitch (config) #inter  range f0/23-24switch (config-if-range) #switch  mode trunk              //Configure the port as Trunk mode switch (config-if-range) #channel-group 1  mode on       //Join Link Group 1 and turn on switch (config-if-range) #exSwitch (config ) #port-channel load-balance dst-ip       //to achieve load balancing by Destination IP address switch ( Config) #exSwitch #show etherchannel summary              //Display Ethernet Channel Information Switch#conf tswitch (config) #interface  port-channel 1       //port configuration mode switch (config) into the aggregation port #exSwitch #show interfaces etherchannel           //displaying aggregation port information 

PC0 (Command prompt cmd) ping 192.168.1.3//link ping 192.168.1.4//link ping 192.168.1.5//Link Pass

Port aggregation is the main application of the occasion:

• The connection between the switch and the switch: The aggregation layer switch to the core layer switch or the core layer switch.

• The connection between the switch and the server: the cluster server provides centralized access with multiple network adapters and switch connections.

• The connection between the switch and the router: the switch and router use port aggregation to solve the WAN and LAN connection bottlenecks.

• connection between server and router: The cluster server provides centralized access with multiple network cards and router connections.

Lab Environment: Windows 7, Cisco PT 6.3

Reference: CCNA Study Guide (7th edition)

CISCO PT Simulation Experiment (5) port aggregation configuration for switches