Configuring IP

As shown in Table 6.7, the results of the network-based IP load sharing algorithm provide evenly-distributed load sharing. Figure 6.8 shows a network where a routing switch has eight equal-cost paths to destination networks N1 – N8. The routing switch (R1) has been enabled to support up to eight IP load sharing paths.

IP Forwarding Cache

Network-Based Load Sharing

Destination Network

Next Hop

N1

R3

N2

R4

N3

R5

 

R2

N4

R6

N5

R7

N6

R8

N7

R9

 

R3

N8

R2

 

N1

 

R4

 

N2

 

N3

 

N4

 

R5

R1

R10

N5

R1 is configured with eight

 

N6

IP load sharing paths, and has

 

 

 

eight paths to networks N1 - N8,

 

 

attached to R10.

R6

N7

 

The cache entries in this example

 

 

are based on the assumption that

 

N8

R1 receives traffic for N1 - N8, in

 

 

 

that order.

 

 

 

R7

 

R8

R9

Figure 6.8 Network-based IP load sharing – example with eight equal-cost paths and eight destination networks

As shown in this example, the algorithm for network-based IP load-sharing does not select the paths beginning with the first path, but the algorithm nonetheless results in an evenly distributed selection of paths.

Disabling or Re-Enabling Load Sharing

If you do not use IP load sharing and you want to disable the feature, use either of the following methods.

USING THE CLI

To disable IP load sharing, enter the following commands:

HP9300(config)# no ip load-sharing

Syntax: [no] ip load-sharing

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