ASR1001: NetFlow fails to send

[ivarstrandberg]

We have an ASR1001 running version 03.10.01.S.

This is the NetFlow config:

flow record v4_r1

match ipv4 tos

match ipv4 protocol

match ipv4 source address

match ipv4 destination address

match transport source-port

match transport destination-port

collect counter bytes long

collect counter packets long

flow exporter EXPORTER-1

destination 192.168.1.1 vrf Mgmt-intf

transport udp 2055

flow monitor FLOW-MONITOR-1

exporter EXPORTER-1

record v4_r1

!

interface TenGigabitEthernet0/1/0.1

ip flow monitor FLOW-MONITOR-1 input

!

end

Output of show flow exporter statistics:

Flow Exporter EXPORTER-1:

  Packet send statistics (last cleared 00:11:29 ago):

    Successfully sent:         0                     (0 bytes)

    Reason not given:          10024                 (11887500 bytes)

  Client send statistics:

    Client: Flow Monitor FLOW-MONITOR-1

      Records added:           389413

        - failed to send:      389413

      Bytes added:             11682390

        - failed to send:      11682390

The config is from this document:

http://www.cisco.com/en/US/docs/ios-xml/ios/fnetflow/configuration/xe-3s/asr1000/fnf-xe-3s-asr1000-book.html

I've also tried to add a source interface in the flow exporter. Does not have any effect.

Various "debug flow exporter" commands does not give any messages at all.

Any ideas? A bug perhaps?

[ivarstrandberg]

Seems like this is a feature, not a bug.

The management-interface belongs to the route processor, and it is not possible to send NetFlows via the RP.

[jsimm1994]

After many failed attempts and receiving confirmations from multiple Cisco engineers that my unsuccessful configuration appeared correct, here was the finally config which worked.  I did not have any success attempting to send Netflow traffic through the vrf.

---

flow record NETFLOW_RECORD
match ipv4 tos
match ipv4 protocol
match ipv4 source address
match ipv4 destination address
match transport source-port
match transport destination-port
match interface input
match interface input snmp
match interface output snmp
collect interface output
collect counter bytes
collect counter packets
!

!

flow exporter NETFLOW_EXPORT
 destination x.x.x.x                      (Netflow monitor server IP)
 source GigabitEthernet_/_/_      (an appropriate interface which can route and communicate with the Netflow monitor server)
 transport udp 2055

!

!

flow monitor NETFLOW_MONITOR
description Original Netflow captures
exporter NETFLOW_EXPORT
cache timeout inactive 10
cache timeout active 5
record NETFLOW_RECORD

!

(Monitor interfaces with traffic) 

interface GigabitEthernet_/_/_

 ip flow monitor NETFLOW_MONITOR input
 ip flow monitor NETFLOW_MONITOR output

interface GigabitEthernet_/_/_

 ip flow monitor NETFLOW_MONITOR input
 ip flow monitor NETFLOW_MONITOR output

!

---