topic Re: Error when using frame size increase in Tools

Error when using frame size increase

yufenwan — Thu, 16 Nov 2017 09:33:13 GMT

Hi experts,

I'm using TRex STL API.

There's only one stream added on my trex port.

Here is the json data I get by the get_stream API in trex_stl_port.py before starting the traffic.

{'mode': {'type': 'continuous', 'rate': {'value': 100, 'type': 'pps'}}, 'enabled': True, 'isg': 0, 'vm': {'instructions': [{'init_value': 64, 'step': 1, 'size': 2, 'max_value': 256, 'name': 'pkt_len', 'op': 'inc', 'type': 'flow_var', 'min_value': 64}, {'name': 'pkt_len', 'type': 'trim_pkt_size'}, {'is_big_endian': True, 'type': 'write_flow_var', 'add_value': -14, 'name': 'pkt_len', 'pkt_offset': 16}]}, 'name': 'test_stream', 'action_count': 0, 'flags': 3, 'self_start': True, 'flow_stats': {'enabled': False}, 'packet': {'meta': '', 'binary': '9E4FOimSoDafjQuOCABFAAAoAAEAAEAGIaIhCwsMIgsLDAQBBAEAAff6AAAAAFAABAAAAAAA'}}

The following error raised when I'm tring to start the traffic.

Exception stack (most recent call last):

#2 Client.py:512 - 'synchronized=synchronized,'

#1 trex_stl_client.py:1236 - 'ret = f(*args, **kwargs)'

#0 trex_stl_client.py:2719 - 'raise STLError(rc)'

Summary error message:

Port 2 : *** *** error: instruction id '0' min packet size 60 is bigger or eq to max packet size 60

I'm really confused about this error.

Could you help look into this issue?

Re: Error when using frame size increase

hhaim@cisco.com — Thu, 16 Nov 2017 10:02:03 GMT

Packet size should be bigger than trim instruction var size.

Packet with len 60 can’t be trim to be 256

Thanks.

Hanoh

Re: Error when using frame size increase

yufenwan — Fri, 17 Nov 2017 05:55:39 GMT

Hi Hanoch,

Should I modify something?

I read the code in trex_stl_hltapi.py and did the same way according to that.

Thanks,

Yufeng.

Re: Error when using frame size increase

hhaim@cisco.com — Fri, 17 Nov 2017 06:18:04 GMT

Please send to our mailer the full script

Hanoh

Sent from my iPhone

Re: Error when using frame size increase

yufenwan — Fri, 17 Nov 2017 07:01:31 GMT

Hi Hanoch,

What's the mailer name?

Thanks,

Yufeng.

Re: Error when using frame size increase

hhaim@cisco.com — Fri, 17 Nov 2017 07:13:16 GMT

https://trex-tgn.cisco.com/trex/doc/index.html

See the forum link

Hanoh

Sent from my iPhone

Re: Error when using frame size increase

yufenwan — Fri, 17 Nov 2017 07:45:13 GMT

Hi Hanoch,

Thanks for your help.

The above issue has been solved and is caused by payload data.