Reg: MPLS and GRE support in TREX

[Manimaran J]

Hi Team,

           When i was trying to send MPLS traffic from TREX i got the below error. I am using TREX version v2.02

           It will be helpful if i got MPLS and GRE support related information in detail.

Error:

Python Traceback follows:

  File "stl/traffic_bng_eth.py", line 63, in get_streams

    return [ self.create_stream() ]

  File "stl/traffic_bng_eth.py", line 12, in create_stream

    base_pkt = Ether(type=0x8847)/MPLS(label=255,s=0,ttl=64)/IP(proto="GRE")/UDP()

NameError: global name 'MPLS' is not defined

Regards,

Manimaran

[Itay Marom]

Hi Manimaran,

TRex is using Scapy to provide packet building support.

Going a bit through Scapy, it seems that MPLS packet building is supported on the contrib directory but not as part of the layers.

so adding:

from scapy.contrib.mpls import MPLS

I suggest you first research Scapy on how to build the packet you like, and when this succeeds, advance to TRex to check it out.

running your line on a clean Scapy gives the same error - so you might try to make this specific line work on scapy and then advance.

Thanks,

Itay

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Itay Marom

[hanoh haim]

Working example,

https://github.com/cisco-system-traffic-generator/trex-core/blob/master/scripts/stl/udp_1pkt_mpls.py

To view this discussion on the web visit https://groups.google.com/d/msgid/trex-tgn/CAPXuVfdUBJxp-HwrEzpFuP7DUms_MgExK%2Bwhcc9HhLr8omhJhQ%40mail.gmail.com.

For more options, visit https://groups.google.com/d/optout.

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Hanoh

Sent from my iPhone

[Manimaran J]

Thank you.Now i can able to create MPLS packets.

Regards,

Manimaran