goflow2 support for PEN fields

[Owlsbluff]

Describe the bug
Im sending IPFIX records like the following with Enterprise fields pen: 9999 field 1,2,3,4 and I get template errors - time=2025-12-19T01:44:45.280Z level=WARN msg="template error" scheme=netflow hostname="" port=2055 count=1 workers=2 blocking=false queue_size=1000000
time=2025-12-19T01:45:00.253Z level=WARN msg="template error" scheme=netflow hostname="" port=2055 count=1 workers=2 blocking=false queue_size=1000000 - debug doesnt show anything further. Does goflow2 support PEN fields? I thought it did. Im using the latest version of goflow2 in docker.

formatter:
fields:
- type
- time_received_ns
- sequence_num
- sampling_rate
- sampler_address
- time_flow_start_ns
- time_flow_end_ns
- bytes
- packets
- src_addr
- dst_addr
- etype
- proto
- src_port
- dst_port
- in_if
- out_if
- src_mac
- dst_mac
# TCP performance fields
- min_rtt_us
- max_rtt_us
- avg_rtt_us
- retransmit_count
- min_tcp_window
- max_tcp_window
protobuf:
- name: min_rtt_us
index: 1001
type: varint
- name: max_rtt_us
index: 1002
type: varint
- name: avg_rtt_us
index: 1003
type: varint
- name: retransmit_count
index: 1004
type: varint
- name: min_tcp_window
index: 1005
type: varint
- name: max_tcp_window
index: 1006
type: varint

ipfix:
mapping:
- field: 1
pen: 99999
penprovided: true
destination: min_rtt_us
- field: 2
pen: 99999
penprovided: true
destination: max_rtt_us
- field: 3
pen: 99999
penprovided: true
destination: avg_rtt_us
- field: 4
pen: 99999
penprovided: true
destination: retransmit_count
- field: 5
pen: 99999
penprovided: true
destination: min_tcp_window
- field: 6
pen: 99999
penprovided: true
destination: max_tcp_window

To Reproduce
Steps to reproduce the behavior:

1. Run GoFlow2 with arguments '...'
2. Receive samples '....'
3. See error

Expected behavior
A clear and concise description of what you expected to happen.

Captures
If applicable, add output (JSON, protobuf), packet captures and device configuration.

Sampler device:

• Brand: [e.g. Cisco, Juniper, Arista, Mikrotik]
• Model: [e.g. MX, QFX]
• Version: [e.g. 22]
• Estimated flow traffic: [e.g. 5000 samples per second]

GoFlow2:

• Version: [e.g. v2.0.0]
• Environment: [e.g. Kubernetes, Docker, Debian package]
• OS: [e.g. Linux Ubuntu Server 23.04]

Additional context
Add any other context about the problem here.

[lspgn]

Hello,

Does goflow2 support PEN fields? I thought it did. Im using the latest version of goflow2 in docker.

Yes they are supported.

Are you able to share a packet capture? It seems that the template error might be a different issue