T7938: VPP: Rewrite sFlow implementation #4796
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zdc
requested changes
Oct 21, 2025
Execute commands for vpp sflow with API calls. Use values for polling interval and sampling rate from 'system sflow'. Add op-mode command
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sever-sever
approved these changes
Oct 22, 2025
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Works as expected in my tests:
set system sflow agent-address '192.168.122.14'
set system sflow interface 'eth0'
set system sflow sampling-rate '1'
set system sflow server 10.0.0.2
set system sflow vpp
set vpp settings interface eth0 driver 'dpdk'
set vpp settings unix poll-sleep-usec '222'
set vpp sflow header-bytes '160'
set vpp sflow interface 'eth0'
vyos@r14:~$ ping 1.1.1.1
PING 1.1.1.1 (1.1.1.1) 56(84) bytes of data.
64 bytes from 1.1.1.1: icmp_seq=1 ttl=58 time=8.99 ms
sFlow server:
vyos@r16# sudo goflow2 | jq
time=2025-10-22T12:49:36.286Z level=INFO msg="starting GoFlow2"
time=2025-10-22T12:49:36.286Z level=INFO msg="starting collection" scheme=sflow hostname="" port=6343 count=1 workers=2 blocking=false queue_size=1000000
time=2025-10-22T12:49:36.288Z level=INFO msg="starting collection" scheme=netflow hostname="" port=2055 count=1 workers=2 blocking=false queue_size=1000000
{
"type": "SFLOW_5",
"time_received_ns": 1761137381262240800,
"sequence_num": 217,
"sampling_rate": 1,
"sampler_address": "192.168.122.14",
"time_flow_start_ns": 1761137381262240800,
"time_flow_end_ns": 1761137381262240800,
"bytes": 102,
"packets": 1,
"src_addr": "192.168.122.14",
"dst_addr": "1.1.1.1",
"etype": "IPv4",
"proto": "ICMP",
"src_port": 0,
"dst_port": 0,
"in_if": 1073741823,
"out_if": 26,
"src_mac": "52:54:00:8d:67:6e",
"dst_mac": "52:54:00:d4:d9:a1",
"src_vlan": 0,
"dst_vlan": 0,
"vlan_id": 0,
"ip_tos": 0,
"forwarding_status": 0,
"ip_ttl": 64,
"ip_flags": 2,
"tcp_flags": 0,
"icmp_type": 0,
"icmp_code": 0,
"ipv6_flow_label": 0,
"fragment_id": 28036,
"fragment_offset": 0,
"src_as": 0,
"dst_as": 0,
"next_hop": "",
"next_hop_as": 0,
"src_net": "0.0.0.0/0",
"dst_net": "0.0.0.0/0",
"bgp_next_hop": "",
"bgp_communities": [],
"as_path": [],
"mpls_ttl": [],
"mpls_label": [],
"mpls_ip": [],
"observation_domain_id": 0,
"observation_point_id": 0,
"layer_stack": [
"Ethernet",
"IPv4",
"ICMP"
],
"layer_size": [
14,
20,
8
],
"ipv6_routing_header_addresses": [],
"ipv6_routing_header_seg_left": 0
}
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Execute commands for vpp sflow with API calls. Use values for polling and sampling rate from 'system sflow'.
Add op mode command
show vpp sflowChange summary
Types of changes
Related Task(s)
Related PR(s)
vyos/vyos-documentation#1694
How to test / Smoketest result
Checklist: