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T-REX

Installation

wget https://trex-tgn.cisco.com/trex/release/v3.03.tar.gz
tar xvf v3.03.tar.gz
cd v3.03

Setup

Create the File /etc/trex_cfg.yaml

- version: 2
  interfaces: ['b1:00.0', 'dummy']
  port_info:
      - ip: 192.168.20.1
        default_gw: 192.168.20.2
      - ip: 2.2.2.2
        default_gw: 1.1.1.1
  platform :
        master_thread_id  : 16
        latency_thread_id : 17
        dual_if   :
             - socket   : 1
               threads  : [18, 19, 20,21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31]

DPDK Bind

Bind to DPDK if necessary, not necessary for mlx5 but it requires special dpdk setup

Run

  1. Run the t-rex daemon: sudo ./t-rex-64 -i -c 14
  2. Run the console: sudo ./trex-console
  3. In trex-console, run ARP service: service, then arp, finally service --off
  4. In the trex-console, latency test using:
    1. Run test using: start -m <packet-rate> --port 0 --force -f stl/udp_1pkt_src_ip_split_latency.py -t fsize=<packet-size>,lfsize=<packet-size> where <packet-rate> is the RFC2544 throughput expressed in percentage e.g. 100% or in million packet per second e.g. 9.6mpps, and <packet-size> is the packet size
    2. Go to TUI mode by typing tui
    3. Go to Latency view by pressing l
    4. A histogram of latency can be toggled by pressing h