[ovs-discuss] question about ipfix

[Ray Li]

I'm testing ipfix on OVS, but I can't get it to work for some reason. I'm
running OVS 2.5.2

Here's my OVS output. I've left out the irrelevant fields

# ovs-vsctl list Flow_Sample_Collector_Set
_uuid               : 5a4dacb6-034d-416a-861b-843a0f63bc9f
bridge              : a1cfae07-227f-471b-a81a-c874eddc6b62
external_ids        : {}
id                  : 1
ipfix               : 460d8e4f-3404-4dc6-a960-706a728d3f3c


# ovs-vsctl list ipfix
_uuid               : 460d8e4f-3404-4dc6-a960-706a728d3f3c
cache_active_timeout: []
cache_max_flows     : []
external_ids        : {}
obs_domain_id       : []
obs_point_id        : []
other_config        : {}
sampling            : 16
targets             : ["192.168.5.2:10000"]

# ovs-vsctl list bridge a1cfae07-227f-471b-a81a-c874eddc6b62
_uuid               : a1cfae07-227f-471b-a81a-c874eddc6b62
ipfix               : []
name                : br.mx

# ovs-ofctl dump-flows br.mx
NXST_FLOW reply (xid=0x4):
 cookie=0x0, duration=272.404s, table=0, n_packets=18392, n_bytes=14687347,
idle_age=0, priority=1,in_port=2
actions=sample(probability=65535,collector_set_id=1,obs_domain_id=20000,obs_point_id=30000),output:1

I'm assuming that probability=65535 means that every packet gets sampled,
according to OVS docs.
As you can see, there are traffic hitting the sample() action but when I
attach tcpdump to the interface I don't see any ipfix traffic. I've
disabled the firewall on this machine, and the tcpdump shows other traffic
to and from 192.168.5.2, so there shouldn't be any network issue.

Am I missing something?

Thanks,
Ray
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