snappi 0.7.20

The Snappi Open Traffic Generator Python Package

Test scripts written in snappi, an auto-generated python SDK, can be executed against any traffic generator conforming to Open Traffic Generator API.

Ixia-c is one such reference implementation of Open Traffic Generator API.

The repository is under active development and is subject to updates. All efforts will be made to keep the updates backwards compatible.

Install on a client

python -m pip install --upgrade snappi

Start scripting

import snappi
# create a new API instance where location points to controller.
# this will use HTTP transport by default; in order to use gRPC instead,
# one can pass additional kwarg `transport=snappi.Transport.GRPC`
api = snappi.api(location='https://localhost')

# create a config object to be pushed to controller
config = api.config()
# add a port with location pointing to traffic engine
prt = config.ports.port(name='prt', location='localhost:5555')[-1]
# add a flow and assign endpoints
flw = config.flows.flow(name='flw')[-1]
flw.tx_rx.port.tx_name = prt.name

# configure 100 packets to be sent, each having a size of 128 bytes
flw.size.fixed = 128
flw.duration.fixed_packets.packets = 100

# add Ethernet, IP and TCP protocol headers with defaults
flw.packet.ethernet().ipv4().tcp()

# push configuration
api.set_config(config)

# start transmitting configured flows
ts = api.transmit_state()
ts.state = ts.START
api.set_transmit_state(ts)

# fetch & print port metrics
req = api.metrics_request()
req.port.port_names = [prt.name]
print(api.get_metrics(req))