Friday, 28 March 2014

Load Balancing With EIGRP


To a remote network multiple paths are configured to the networks, typically. When those paths are nearly equal or equal, then all the utilized available parts are makes a sense. Instead of the layer 2 forwarding layer 3 forwarding has the ability and high capability of loading the balance between the multiple sorts of paths. And this the obtained router which was used to send frames out in multiple frames in order to reduce the amount of traffic and data to be reduced in a single sort of network connection. And the important key to this network paths is that they should be in an equal cost and to compute the costs EIGRP uses the metric in a given single network. 

EIGRP Metric:
Several sort of criteria are used in the bases of the EIGRP Metric, and by default the EIGRP uses only two of these various criteria’s.

  • Delay: There is a delay in the cumulative interface in a microseconds along all the way in the path.

  • Bandwidth: It is the bandwidth between the destination and the source in a small bandwidth. 
And some other criteria’s are used in a frequent recalculation of the topology table and they are used in the typical results.
  • Load: this sort of value is represented by the worst load in a link in between the destination and the source, which are computed in the based on the configured bandwidth and the packet rate of the interface.

  • Reliability:  the worst reliability is maintained in between the destination and the source which are mainly based on the keep alive.

Load Balancing Across the Equal Parts:
In the destination address the equal-cost load is used to balance the capability of the router to provide and distribute traffic of data among all its network ports which are in the same metric. The load balancing increases the network bandwidth in an effective manner and also increases the usage of the network segments.
                                        
By default the load balancing is across up to the four different equal costa and paths in the IP, Cisco and IOS Software appliances. And the router configuration command of maximum-path, they are up to 16 equal- cost routes which are being kept in the table routing, an if there the maximum-path to be set as one then the load balancing is disabled. When a certain load process was switched then there occurs of equal costs in a per-packet basis. And when there was a fast switch in the packets, and then on the per-destination basis load balancing over an equal set of costs are occurred.

Configuring the Load Balancing Across the Unequal-Cost Paths:
Multiple routes with have a different metrics can be balanced by the EIGRP, which is well known as an unequal-cost load balancing. And to the degree in which the EIGRP performs the load balancing is then controlled by the variance of the commands.
And the value for the variance command is from the 1 to 128 in the multiplier parameter which are used for the load balancing. There is equal-cost loading is being performed because of the default value as 1. In these the multiplier is defined in the range of the matric values which are expected in the load balancing in the EIGRP process. 

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