TRex Traffic Generator

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Hanoch Haim, sre...@benunets.com8

4/28/20

Announcement

TRex EMU for client protocols (beta) v2.76

Hi Hanoh, I am simulating 10K GRE tunnels, under each tunnel bringing up 10 dhcp clients. Earlier

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Announcement

TRex EMU for client protocols (beta) v2.76

Hi Hanoh, I am simulating 10K GRE tunnels, under each tunnel bringing up 10 dhcp clients. Earlier

4/28/20

brendana...@gmail.com

12/7/25

EMU load profile fails

I am running v3.08 and when I first load the IGMP profile it works just fine. When I run

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EMU load profile fails

I am running v3.08 and when I first load the IGMP profile it works just fine. When I run

12/7/25

chris...@gmail.com2

11/28/25

Trex for performance - port stats is fine but stream stats counter is not working

Can someone please clarify , if per stream stats works fine for high performance traffic ? On Friday,

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Trex for performance - port stats is fine but stream stats counter is not working

Can someone please clarify , if per stream stats works fine for high performance traffic ? On Friday,

11/28/25

Murali Tharan

11/18/25

how to check profile exists on a port or not

Hi Team, I am facing error "profile does not exist" in the port, while doing traffic start

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how to check profile exists on a port or not

Hi Team, I am facing error "profile does not exist" in the port, while doing traffic start

11/18/25

sed.p...@gmail.com

11/8/25

What combination of Distro OS/version and Python version would allow me to run trex3.x on XXV710-DA2 ?

Hi All, If somebody is using XXV710 NICs would you please share details of your environment ? IE

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What combination of Distro OS/version and Python version would allow me to run trex3.x on XXV710-DA2 ?

Hi All, If somebody is using XXV710 NICs would you please share details of your environment ? IE

11/8/25

Johannes Luther, … Andreas Bourges4

11/3/25

TRex client Python 3.12 support

That's great news - thanks! Shlomo Yaakov schrieb am Mittwoch, 29. Oktober 2025 um 15:08:25 UTC+1

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TRex client Python 3.12 support

That's great news - thanks! Shlomo Yaakov schrieb am Mittwoch, 29. Oktober 2025 um 15:08:25 UTC+1

11/3/25

Haklat haklat, Shlomo Yaakov3

10/31/25

Failed to build 3.07 with Mellanox

Thanks, yes the pre-compiled package works (except few things in my case and not on all our servers (

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Failed to build 3.07 with Mellanox

Thanks, yes the pre-compiled package works (except few things in my case and not on all our servers (

10/31/25

chris...@gmail.com, hanoh haim27

10/10/25

Latency stats drops few packets received.Need help in debugging further

Thanks Hanoh for the response . Could you brief me the root cause for this issue , so that i can see

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Latency stats drops few packets received.Need help in debugging further

Thanks Hanoh for the response . Could you brief me the root cause for this issue , so that i can see

10/10/25

Haklat haklat2

10/8/25

DPDK args threads issue when compiling with RTE_MAX_LCORE > 256

Hi, found some few uint8_t variables that sounded related in following files that I changed to

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DPDK args threads issue when compiling with RTE_MAX_LCORE > 256

Hi, found some few uint8_t variables that sounded related in following files that I changed to

10/8/25

Mohsen Meamarian, chris...@gmail.com3

9/30/25

TRex Skipping Latency Packet

Hi, The problem was packet size; the packet size should be larger than a specific number. Best, On

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TRex Skipping Latency Packet

Hi, The problem was packet size; the packet size should be larger than a specific number. Best, On

9/30/25

chris...@gmail.com

9/29/25

Latency stats doesn't show all the packets, though capture has all the packets

Hi All , I am using trex stateless, v 3.06. I am running trex within a kubernetes pod. My cfg is : -

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Latency stats doesn't show all the packets, though capture has all the packets

Hi All , I am using trex stateless, v 3.06. I am running trex within a kubernetes pod. My cfg is : -

9/29/25

robert.b...@gmail.com

6/20/25

IPG is not being followed when using ASTF-flow

Hi guys, have a problem, that when we want to generate following PCAP that is attached, the IPG is

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IPG is not being followed when using ASTF-flow

Hi guys, have a problem, that when we want to generate following PCAP that is attached, the IPG is

6/20/25

Bent Kuhre

5/26/25

regression test

Hi I am trying to run the regression test, but I got the following error: ImportError: cannot import

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regression test

Hi I am trying to run the regression test, but I got the following error: ImportError: cannot import

5/26/25

mura...@gmail.com

5/6/25

How to check port is in active or not

Hi Team, While modifying the traffic stream i am getting the below error. How to check port is in

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How to check port is in active or not

Hi Team, While modifying the traffic stream i am getting the below error. How to check port is in

5/6/25

Haresh Khandelwal

5/5/25

Trex bird integration does not support evpn route type 5

Hi, I am trying to use BIRD to advertise and receive EVPN type 5 routes where the remote end is using

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Trex bird integration does not support evpn route type 5

Hi, I am trying to use BIRD to advertise and receive EVPN type 5 routes where the remote end is using

5/5/25

Vivek Sharma

5/2/25

Statistics collection using Python API

Adding for easier reference for others who might be interested in pulling statistics from Trex and

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Statistics collection using Python API

Adding for easier reference for others who might be interested in pulling statistics from Trex and

5/2/25

Mohsen Meamarian

4/23/25

Latency meaerments

Hi, When i am sending pkts with latency tag with trex, only if i be in service mode (via console) i

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Latency meaerments

Hi, When i am sending pkts with latency tag with trex, only if i be in service mode (via console) i

4/23/25

mura...@gmail.com, Foday Harris2

4/22/25

Need filters to apply on RX port of trex

Having the same issue. tried to use flow id but doesn't really work when running between two

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Need filters to apply on RX port of trex

Having the same issue. tried to use flow id but doesn't really work when running between two

4/22/25

Haklat haklat, … Todd Blevins3

4/18/25

TRex lcore limit

i have a setup with 512 cores: NUMA node0 CPU(s): 0-127256-383 NUMA node1 CPU(s): 128-255384-511 made

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TRex lcore limit

i have a setup with 512 cores: NUMA node0 CPU(s): 0-127256-383 NUMA node1 CPU(s): 128-255384-511 made

4/18/25

Andreas Bourges, … Haklat haklat4

4/8/25

*** Failed allocating statistic counter

Hi, I finally tried compiling with: - trex_driver_mlx5.cpp: num_counters = 127; //With MAX_FLOW_STATS

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*** Failed allocating statistic counter

Hi, I finally tried compiling with: - trex_driver_mlx5.cpp: num_counters = 127; //With MAX_FLOW_STATS

4/8/25

brendana...@gmail.com

3/23/25

tui won’t run

Hello, I have a trex instance I haven't used in a while. I can get traffic to work just fine.

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tui won’t run

Hello, I have a trex instance I haven't used in a while. I can get traffic to work just fine.

3/23/25

Цветков Андрей, … Dominik Tran9

3/4/25

trex v3.06

We had same problem with TRex v3.06 on clean Debian 12 (./_t-rex-64: so/x86_64/libstdc++.so.6:

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trex v3.06

We had same problem with TRex v3.06 on clean Debian 12 (./_t-rex-64: so/x86_64/libstdc++.so.6:

3/4/25

Christopher Adigun2

2/20/25

GTPU LoadTest on VPP

Apologies this looks more like incomplete VPP GTPU config for the return traffic. I will continue

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GTPU LoadTest on VPP

Apologies this looks more like incomplete VPP GTPU config for the return traffic. I will continue

2/20/25

chris...@gmail.com, hanoh haim4

2/11/25

How are Linux namespaces associated with trex interface ?

Hi Hanoh , I could resolve the transmission of packets out of sriov vf though mac address doesn't

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How are Linux namespaces associated with trex interface ?

Hi Hanoh , I could resolve the transmission of packets out of sriov vf though mac address doesn't

2/11/25

mura...@gmail.com, Цветков Андрей2

2/10/25

Need to connect two TRex server (1gig and 10gig) in single API connect call

Hi Yes. it possible two servers - client / sever 1 config client - interfaces: ['07:00.0',

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Need to connect two TRex server (1gig and 10gig) in single API connect call

Hi Yes. it possible two servers - client / sever 1 config client - interfaces: ['07:00.0',

2/10/25

Haresh Khandelwal, Цветков Андрей3

2/10/25

Queue_full and virtio vhu interface

Hi Set addishinal pameters for virt nic - queues="16" rx_queue_size="1024"

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Queue_full and virtio vhu interface

Hi Set addishinal pameters for virt nic - queues="16" rx_queue_size="1024"

2/10/25

Andreas Bourges

1/28/25

[STL][IPv6] STLVmFixChecksumHw

Hi Team - hope you're all doing well... ...I'm currently onboarding at a new customer and

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[STL][IPv6] STLVmFixChecksumHw

Hi Team - hope you're all doing well... ...I'm currently onboarding at a new customer and

1/28/25

Mohsen Meamarian

1/14/25

min ramp up time

Hi, Does anyone know the minimum ramp-up time for STL in TRex when using the SingleBurst API?

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min ramp up time

Hi, Does anyone know the minimum ramp-up time for STL in TRex when using the SingleBurst API?

1/14/25

Mohsen Meamarian

1/10/25

STLTXSingleBurst Ramp-Up Time and Narrow Bursts in TRex v3.4

Hi everyone, I have a question regarding the ramp-up time for the STLTXSingleBurst feature in TRex v3

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STLTXSingleBurst Ramp-Up Time and Narrow Bursts in TRex v3.4

Hi everyone, I have a question regarding the ramp-up time for the STLTXSingleBurst feature in TRex v3

1/10/25

btjo...@gmail.com

11/27/24

FATAL errors when starting TRex v3.06 in stateless mode

I've been trying to uplift a TRex configuration that runs fine with v2.81 to v3.06. The system is

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FATAL errors when starting TRex v3.06 in stateless mode

I've been trying to uplift a TRex configuration that runs fine with v2.81 to v3.06. The system is

11/27/24

shashank varshney, Mohsen Meamarian2

11/15/24

Not able to use all available cores - try to reduce `-c value ` or 'c:' in the config file error

Hi, We have the same problem, any solution guys? Best, On Thursday, June 9, 2022 at 6:54:49 AM UTC+2

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Not able to use all available cores - try to reduce `-c value ` or 'c:' in the config file error

Hi, We have the same problem, any solution guys? Best, On Thursday, June 9, 2022 at 6:54:49 AM UTC+2

11/15/24