snappi 0.1.25

The Snappi Open Traffic Generator Python Package

Test scripts written using snappi (a python library) can be executed against
any traffic generator conforming to Open Traffic Generator API.

Install on a client

python -m pip install --upgrade snappi
# or install along with ixnetwork extension
python -m pip install --upgrade "snappi[ixnetwork]"

Start scripting

"""
Configure a raw TCP flow with,
- tx port as source to rx port as destination
- frame count 10000, each of size 128 bytes
- transmit rate of 1000 packets per second
Validate,
- frames transmitted and received for configured flow is as expected
"""

import snappi
# when using ixnetwork extension, host is IxNetwork API Server
api = snappi.api(host='https://localhost:443', ext='ixnetwork')
# new config
config = api.config()
# when using ixnetwork extension, port location is chassis-ip;card-id;port-id
tx, rx = (
    config.ports
    .port(name='tx', location='192.168.0.1;2;1')
    .port(name='rx', location='192.168.0.1;2;2')
)
# configure only one flow
flw = config.flows.flow(name='flw')[-1]
# configure rate, size, frame count and endpoints
flw.size.fixed = 128
flw.rate.pps = 1000
flw.duration.fixed_packets.packets = 10000
flw.tx_rx.port.tx_name = tx.name
flw.tx_rx.port.rx_name = rx.name
# configure protocol headers with defaults fields
flw.packet.ethernet().vlan().ipv4().tcp()
# set configuration and start traffic
api.set_config(config)
ts = api.transmit_state()
ts.state = ts.START
api.set_transmit_state(ts)
# wait for flow metrics to be as expected
while True:
    metrics = api.get_flow_metrics(api.flow_metrics_request())
    if all([m.frames_tx == 10000 == m.frames_rx for m in metrics]):
        break