I have a 3750G and 3750X which were both running Netflow and exporting to PRTG fine. I recently powered them down and changed some interface configurations around, renamed both switches (basically I'm using the 3750x as a core switch now instead of an access switch). Everything works fine, except netflow doesn't seem to export at all now. I made no changes to the netflow configuration at all. I've turned terminal monitor on and run "debug ip flow", "debug ip flow cache" and "debug ip flow non-forwarded" on both switches and I get nothing in the CLI. Here's some example output from one of the switches:
#do sh ip flow export
Flow export v1 is enabled for main cache
Export source and destination details :
VRF ID : Default
Source(1) 10.8.255.2 (Loopback1)
Destination(1) 10.5.7.172 (9997)
Version 1 flow records
0 flows exported in 0 udp datagrams
0 flows failed due to lack of export packet
0 export packets were sent up to process level
#do sh flow export stat
Flow Exporter NetFlow-To-PRTG:
Packet send statistics (last cleared 00:46:58 ago):
Successfully sent: 0 (0 bytes)
Client send statistics:
Client: Flow Monitor NetFlow-To-PRTG
Records added: 0
Bytes added: 0
#do sh run | s flow
flow record NetFlow-To-PRTG
match ipv4 tos
match ipv4 protocol
match ipv4 source address
match ipv4 destination address
match transport source-port
match transport destination-port
match transport tcp source-port
match transport tcp destination-port
match transport tcp flags
flow exporter NetFlow-To-PRTG
destination 10.5.7.172
source Port-channel1
transport udp 9997
flow monitor NetFlow-To-PRTG
record NetFlow-To-PRTG
exporter NetFlow-To-PRTG
cache timeout active 5
ip flow-export source Loopback1
ip flow-export destination 10.5.7.172 9997Again, I have not changed any of the netflow config, outside of changing the source interfaces a bit just to see if I could get it to work. I know it's not an IOS version issue because it was running fine before. I tried running "clear ip cef * prefix" but that didn't seem to help either.
I'm kind of at a loss since I didn't touch any of the netflow config when I reconfigured the switches to swap the core and the access switch around. Any help would be greatly appreciated.
