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Here's a good sample config. I'm assuming you're sending the Flow data to a host outside your organization and that the name of your outside interface is &quot;outside&quot;. 
 
snmp-server host outside 1.1.1.1 community SNMPNAME version 2c 
snmp-server location LOCATION-NAME 
snmp-server enable traps all 
! 
flow-export destination outside 1.1.1.1 2055 
flow-export template timeout-rate 1 
flow-export delay flow-create 60 
! 
access-list netflow-export extended permit ip any any 
! 
class-map netflow-export-class 
&nbsp;match access-list netflow-export 
! 
policy-map global_policy 
&nbsp;class inspection_default 
&nbsp; &nbsp;inspect snmp 
&nbsp;class netflow-export-class 
&nbsp; flow-export event-type all destination 1.1.1.1
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Here's a good sample config. I'm assuming you're sending the Flow data to a host outside your organization and that the name of your outside interface is "outside".

snmp-server host outside 1.1.1.1 community SNMPNAME version 2c
snmp-server location LOCATION-NAME
snmp-server enable traps all
!
flow-export destination outside 1.1.1.1 2055
flow-export template timeout-rate 1
flow-export delay flow-create 60
!
access-list netflow-export extended permit ip any any
!
class-map netflow-export-class
 match access-list netflow-export
!
policy-map global_policy
 class inspection_default
   inspect snmp
 class netflow-export-class
  flow-export event-type all destination 1.1.1.1

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I have never configured netflow on the ASA and after my research, I see that you can configure netflow or NSEL. Are those the same thing? Is there any performance issue when implementing Netflow on the ASA? Any tips? Thanks
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I have never configured netflow on the ASA and after my research, I see that you can configure netflow or NSEL. Are those the same thing? Is there any performance issue when implementing Netflow on the ASA? Any tips? Thanks

netflow on ASA 5500 series

Hardware-based firewalls provide more sophisticated protection for inbound and outbound traffic than the simple Windows software firewall or the basic NAT firewalls found in routers. These devices implement techniques such as stateful packet inspection, deep packet inspection, and content filtering; and may include built-in antivirus and anti-malware protection.

Hardware Firewalls

Networking hardware includes the physical devices facilitating the use of a computer network. Typically, networking hardware includes gateways, routers, network bridges, modems, wireless access points, networking cables, line drivers, switches, hubs, and repeaters. But it also includes hybrid network devices such as multilayer switches, protocol converters, bridge routers, proxy servers, firewalls, network address translators, multiplexers, network interface controllers, wireless network interface controllers, ISDN terminal adapters and other related hardware.

Networking Hardware-Other

Hardware includes cell phones and other digital living devices, tablets, computers, servers, peripherals and components, printers and scanners, gaming consoles, networking hardware such as routers, hubs, switches and modems, storage devices and security equipment such as firewalls and other appliances.