Catalyst 4500 series switches with Supervisor Engine 7-E and Cisco IOS XE Software Release 3.1.0 SG supports Flexible NetFlow. Hence we thought of sharing the configuration information with you.
The configuration of Flexible NetFlow in these switches is similar to the other regular Flexible NetFlow. Same 4 steps:
1) Creating Exporter
2) Creating Record
3) Creating Monitor
4) Associate the monitor to the interface.
However, supervisor 7-E does not support predefined records like traditional routers (record neflow ipv4 original-input). Hence it is compulsory that we should create a record.
You can configure the switch as mentioned below:
Exporter creation:
flow exporter NFAexporter // where to send the flow records
destination 192.168.1.1
Record creation:
flow record NFArecord // specifies the fields in the packet
match ipv4 source address
match ipv4 destination address
collect counter bytes long
collect counter packets long
collect timestamp sys-uptime first
collect timestamp sys-uptime last
Monitor creation:
flow monitor NFAmonitor // here you can also specify how many unique flows records to collect
record NFArecord
exporter NFAexporter
cache timeout active 1
cache timeout inactive 30
cache entries 1000
Associate the monitor to the interface
interface GigabitEthernet 0/1
ip flow monitor m1 layer2-switched input // flow records collected even for bridged traffic.
ip flow monitor m1 input
interface GigabitEthernet 0/2
ip flow monitor m1 layer2-switched input // flow records collected even for bridged traffic.
ip flow monitor m1 input
Once NetFlow is configured and flows reach the NetFlow Analyzer server the router will be auto detected and reports are generated.
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The original article/video can be found at Flexible NetFlow configuration in Cisco 4500 with Supervisor Engine 7-E and Cisco IOS XE