Try this:
#Main Config:
ip snmp agent
snmp-server host [Nagios IP] traps version [1|2c|3] [commstring]
ip flow export destination [Nagios IP] 5666|5667|12489
ip flow cache timeout active 1
#Optional:
ip flow top-talkers
top 10
#Outbound Interface(s):
ip flow egress
no awcp (if you don't use Adtran APs)
no lldp send port-description
no lldp send system-name
no lldp send system-description
no lldp send system-capabilities
no lldp send management-address
bandwidth []
On the outbound, disable lldp since it could interfere. The bandwidth parameter isn't required for this to work, but the information will be useful.
