Understanding The Netflow Statistics - Cisco WS-C6506 Software Manual

Chapter 13 Configuring CEF for PFC2 and PFC3A
Figure 13-2
MAC = Aa
Host A
Data

Understanding the NetFlow Statistics

With Supervisor Engine 720 (MSFC3), IPX routing is done through the software.
Note
These sections describe NetFlow statistics:
•
•
•
NetFlow Statistics Overview
CEF for PFC2/PFC3A generates flow statistics for Layer 3-switched traffic, which are stored in the
NetFlow table. NetFlow statistics can be displayed with show commands and are also available to
NetFlow Data Export (NDE).
A NetFlow table with more than 32,000 entries increases the probability that there will be insufficient
Note
room to store statistics. To reduce the number of entries in the NetFlow table, you can exclude specified
IP protocols from the statistics or use the least granular flow mask (see the
Entries from the NetFlow Table" section on page
OL-8978-04
IPX CEF Example Topology
Source IPX Destination
Address IPX Address
01.Aa 03.Bb
01.Aa 02.Cc
02.Cc 01.Aa
Net 1/Sales
01
01.Aa:02.Cc Aa:Dd
NetFlow Statistics Overview, page 13-11
NetFlow Table Entry Aging, page 13-12
Flow Masks, page 13-12
Rewrite Src/Dst Destination
MAC Address VLAN
Dd:Bb Marketing
Dd:Cc Engineering
Dd:Aa Sales
MAC = Dd
MSFC
Data
13-31).
Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
Understanding How Layer 3 Switching Works
MAC = Bb
Host B
MAC = Cc
Host C
01.Aa:02.Cc Dd:Cc
"Excluding the IP Protocol
13-11