3 # Copyright (c) 2016 Cisco and/or its affiliates.
4 # Licensed under the Apache License, Version 2.0 (the "License");
5 # you may not use this file except in compliance with the License.
6 # You may obtain a copy of the License at:
8 # http://www.apache.org/licenses/LICENSE-2.0
10 # Unless required by applicable law or agreed to in writing, software
11 # distributed under the License is distributed on an "AS IS" BASIS,
12 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 # See the License for the specific language governing permissions and
14 # limitations under the License.
16 """This script uses T-REX stateless API to drive t-rex instance.
19 - T-REX: https://github.com/cisco-system-traffic-generator/trex-core
20 - compiled and running T-REX process (eg. ./t-rex-64 -i -c 4)
21 - trex_stl_lib.api library
22 - Script must be executed on a node with T-REX instance
25 1. Stop any running traffic
32 sys.path.insert(0, "/opt/trex-core-2.25/scripts/automation/"+\
33 "trex_control_plane/stl/")
34 from trex_stl_lib.api import *
37 def stop_all_traffic_streams():
38 """Stop traffic if any is running.
44 client = STLClient(verbose_level=LoggerApi.VERBOSE_QUIET)
50 client.acquire(force=True)
51 client.stop(ports=[0, 1])
53 # read the stats after the test
54 stats = client.get_stats()
56 print("#####statistics (approx.)#####")
57 print(json.dumps(stats, indent=4,
58 separators=(',', ': '), sort_keys=True))
60 lost_a = stats[0]["opackets"] - stats[1]["ipackets"]
61 lost_b = stats[1]["opackets"] - stats[0]["ipackets"]
63 print("\npackets lost from 0 --> 1: {0} pkts".format(lost_a))
64 print("packets lost from 1 --> 0: {0} pkts".format(lost_b))
66 except STLError as ex_error:
67 print_error(str(ex_error))
75 """Print error message on stderr.
77 :param msg: Error message to print.
82 sys.stderr.write(msg+'\n')
88 stop_all_traffic_streams()
90 if __name__ == "__main__":