Installation and Getting Started Guide

NOTE: If the setting for the maximum number of paths is lower than the actual number of equal-cost paths, the software does not use all the paths for load sharing.

To change the number of paths, use either of the following methods.

USING THE CLI

To change the number of IP load sharing paths, enter a command such as the following:

HP9300(config)# ip load-sharing 8

Syntax: [no] ip load-sharing [<num>]

The <num> parameter specifies the number of paths and can be from 2 – 8.

USING THE WEB MANAGEMENT INTERFACE

1.Log on to the device using a valid user name and password for read-write access. The System configuration panel is displayed.

2.Click on the plus sign next to Configure in the tree view to expand the list of configuration options.

3.Click on the plus sign next to IP in the tree view to expand the list of IP option links.

4.Click on the General link to display the IP configuration panel.

5.Edit the value in the # of Paths field. You can enter a number from 2 – 8.

6.Click the Apply button to save the change to the device’s running-config file.

7.Select the Save link at the bottom of the dialog. Select Yes when prompted to save the configuration change to the startup-config file on the device’s flash memory.

Optimizing the IP Forwarding Cache

NOTE: This section applies only to routing switches that are running software release 07.1.X or higher.

The IP forwarding cache provides fast-path forwarding for IP traffic. The entries in the cache contain the following information:

•Source IP address and TCP or UDP port

•Destination IP address and TCP or UDP port

The default cache settings are adequate for most situations. However, if the routing switch forwards traffic to a very large number of destination hosts or uses default routes to send traffic to a large number of destinations, you may need to adjust the cache settings.

The software on chassis routing switches allows you to adjust the following forwarding cache settings:

•Cache capacity for unicast forwarding entries – The forwarding cache contains a unique entry for each host destination. You can set the cache to allow more unicast forwarding entries by enabling the high­ performance mode. This option enables the cache to contain more unique entries for unicast traffic.

•Cache format for default route entries – The forwarding cache contains a unique entry for each host destination of a default route. You can increase the cache’s capacity for default route entries by enabling the default-route aggregation mode. This option increases the cache’s capacity for default routes by aggregating forwarding information for multiple destinations into single default-route entries.

These optimization options are disabled by default. To enable them, use the following procedures.

Enabling Unicast High-Performance Mode

To increase the capacity of the forwarding cache for unicast entries, use the following CLI method.

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