Cisco Systems NAM, 5 manual Hardware Deduplication, Auto Create of New Waas Devices

Chapter 2 Setting Up The NAM Traffic Analyzer

Traffic

Auto Create of New WAAS Devices

If you have numerous WAE devices, you can set up the NAM to configure newly discovered WAE devices using a predefined configuration template using the NAM Auto Config option.

Note If most of your WAE devices are edge WAE, you might want to set the auto config to be that of the edge device, then manually configure the data center WAE. For example, select the Client segment for monitoring.

To configure WAAS auto-config:

Step 1 Choose Setup > Traffic > NAM Data Sources. The data sources are displayed.

Step 2 Click the Auto Create button.

The NAM Data Source Configuration Dialog displays.

Step 3 Check the WAAS check box.

Step 4 Check the check boxes for the desired Segments. See Editing WAAS Data Sources, page 2-34, for more information.

Hardware Deduplication

Note This section applies only to Cisco NAM 2200 Series appliances.

NAM 5.0 supports hardware-based detection of duplicate packets and allows you to configure a single deduplication filter across all adapter ports.

After you enable deduplication, the NAM appliance detects and filters the duplicated packets. The packet is identified as duplicated if all inspected segments match another packet within the specific time window.

In addition to the duration-based timeout, there is also a fixed packet-count timeout. There cannot be more than 7 packets between the duplicate packets. If packets 0 and 8 are identical, packet 8 will be dropped. If packets 0 and 9 are identical, packet 9 will not be dropped.

To configure packet deduplication:

Step 1 Choose Setup > Traffic > Hardware Deduplication.

The Deduplication window displays.

Step 2 Check the Enabled check box to enable packet deduplication.

Step 3 Enter a value in the Time Window (1-127 in milliseconds) for the search or buffer period.

The value you set in the Time Window indicates the length of time (n milliseconds) in which two packets can be considered duplicates. If the Time Window is 100 ms but two identical packets arrive 120ms apart, the second packet would not be dropped. If the identical packets arrive 80 ms apart, the second packet would be dropped.

Step 4 Click to choose a segment of the packet to inspect for deduplication.

	User Guide for the Cisco Network Analysis Module (NAM) Traffic Analyzer, 5.0
OL-22617-01		2-35