IOAM Analyser for IPv6 does

Analysing iOAM records and aggregating statistics
Export the aggregated statistics over IP-FIX to external collector.

Following statistics are collected and exported per IOAM flow:

All the Paths available for the flow : Collected using IOAM Trace.
Delay
POT data: No of packets In Policy and Out of Policy.
Packet loss count
Reordered Packet count
Duplicate Packet count

This feature can work on IOAM decapsulating node or as a standalone external analyser.

Configuration

Below command can be used to configure a VPP node as IOAM analyser:

set ioam analyse [export-ipfix-collector] [disable] [listen-ipfix]

export-ipfix-collector : This keyword instructs VPP to export the IOAM analysis data to be exported to an external collector via IP-Fix. Note that IP-Fix collector information has to be configured using the below command:
```
set ipfix exporter collector <Remote IP Address> src <Local IP address>
```
listen-ipfix : This keyword instructs VPP node to listen to IP-Fix port 4739 to receive RAW IOAM records exported by using IOAM Export plugin and analyse IOAM records.
disable : This keyword is used to instruct VPP to stop analysing IOAM.

Example1 : To use VPP as IOAM Analyser on IOAM decapsulating node and export.

set ipam analyse export-ipfix-collector
set ipfix exporter collector 172.16.1.254 src 172.16.1.229

Above commands when configured on a IOAM Decapsulating node will analyse 
all the IOAM data before Decap, aggregate statistics and export them to
node with IP address 172.16.1.254 via IP-Fix.

Example2 : To use VPP as a standalone IOAM Analyser and export.

set ipam analyse export-ipfix-collector listen-ipfix
set ipfix exporter collector 172.16.1.254 src 172.16.1.229

Above commands when configured on a VPP node will listen on IP-Fix 
port 4739 for IP-Fix records containing IOAM Raw data aggregate 
statistics and export them to node with IP address 172.16.1.254 via IP-Fix.

Operational data

For checking the operational data of VPP IOAM analyser below command needs to be used:

show ioam analyse

Example:

vpp# show ioam analyse
iOAM Analyse Information:
Flow Number: 1 
pkt_sent : 400
pkt_counter : 400
bytes_counter : 458700
Trace data: 
pkt_sent : 400
pkt_counter : 100
bytes_counter : 458700
Trace data: 
path_map:

node_id: 0x1, ingress_if: 1, egress_if: 2, state:UP
node_id: 0x2, ingress_if: 0, egress_if: 2, state:UP
node_id: 0x3, ingress_if: 3, egress_if: 0, state:UP
pkt_counter: 200
bytes_counter: 229350
min_delay: 10
max_delay: 50
mean_delay: 15

node_id: 0x1, ingress_if: 1, egress_if: 2, state:UP
node_id: 0x4, ingress_if: 10, egress_if: 12, state:UP
node_id: 0x3, ingress_if: 3, egress_if: 0, state:UP
pkt_counter: 200
bytes_counter: 229350
min_delay: 19
max_delay: 100
mean_delay: 35

POT data: 
sfc_validated_count : 200
sfc_invalidated_count : 200

Seqno Data:
RX Packets        : 400
Lost Packets      : 0
Duplicate Packets : 0
Reordered Packets : 0