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-rw-r--r--nfvbench/traffic_gen/trex.py10
1 files changed, 6 insertions, 4 deletions
diff --git a/nfvbench/traffic_gen/trex.py b/nfvbench/traffic_gen/trex.py
index 68ab95a..207fd52 100644
--- a/nfvbench/traffic_gen/trex.py
+++ b/nfvbench/traffic_gen/trex.py
@@ -48,6 +48,8 @@ from trex_stl_lib.api import STLVmFlowVarRepetableRandom
from trex_stl_lib.api import STLVmWrFlowVar
from trex_stl_lib.api import UDP
from trex_stl_lib.services.trex_stl_service_arp import STLServiceARP
+
+
# pylint: enable=import-error
@@ -138,15 +140,15 @@ class TRex(AbstractTrafficGenerator):
def create_pkt(self, stream_cfg, l2frame_size):
pkt_base = Ether(src=stream_cfg['mac_src'], dst=stream_cfg['mac_dst'])
-
+ # TRex requires minimum payload size 16B
if stream_cfg['vlan_tag'] is not None:
# 50 = 14 (Ethernet II) + 4 (Vlan tag) + 4 (CRC Checksum) + 20 (IPv4) + 8 (UDP)
pkt_base /= Dot1Q(vlan=stream_cfg['vlan_tag'])
- payload = 'x' * (max(64, int(l2frame_size)) - 50)
+ l2payload_size = max(max(64, int(l2frame_size)) - 50, 16)
else:
# 46 = 14 (Ethernet II) + 4 (CRC Checksum) + 20 (IPv4) + 8 (UDP)
- payload = 'x' * (max(64, int(l2frame_size)) - 46)
-
+ l2payload_size = max(max(64, int(l2frame_size)) - 46, 16)
+ payload = 'x' * l2payload_size
udp_args = {}
if stream_cfg['udp_src_port']:
udp_args['sport'] = int(stream_cfg['udp_src_port'])