X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=nfvbench%2Ftraffic_gen%2Ftrex.py;fp=nfvbench%2Ftraffic_gen%2Ftrex.py;h=1e7c1335996361e5c564c38e6a953fde67733b8b;hb=8450089d5aa09e1c4de4b5701f5210b8f8f7dfdc;hp=e42afceaeaddb804d4b9733a4c0d091f7436a59e;hpb=ca7bc608e72076dba0b9db50b473ab0d0d18c0e6;p=nfvbench.git

diff --git a/nfvbench/traffic_gen/trex.py b/nfvbench/traffic_gen/trex.py
index e42afce..1e7c133 100644
--- a/nfvbench/traffic_gen/trex.py
+++ b/nfvbench/traffic_gen/trex.py
@@ -136,13 +136,16 @@ class TRex(AbstractTrafficGenerator):
         return result
 
     def create_pkt(self, stream_cfg, l2frame_size):
-        # 46 = 14 (Ethernet II) + 4 (CRC Checksum) + 20 (IPv4) + 8 (UDP)
-        payload = 'x' * (max(64, int(l2frame_size)) - 46)
 
         pkt_base = Ether(src=stream_cfg['mac_src'], dst=stream_cfg['mac_dst'])
 
         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)
+        else:
+            # 46 = 14 (Ethernet II) + 4 (CRC Checksum) + 20 (IPv4) + 8 (UDP)
+            payload = 'x' * (max(64, int(l2frame_size)) - 46)
 
         udp_args = {}
         if stream_cfg['udp_src_port']: