Stateless Traffic Gen with VPP ============================== It’s simple to configure vpp as a high-performance stateless traffic generator. A couple of vpp worker threads running on an older system can easily generate 20 MPPS’ worth of traffic. In the configurations shown below, we connect a vpp traffic generator and a vpp UUT using two 40 gigabit ethernet ports on each system: :: +-------------------+ +-------------------+ | traffic generator | | UUT | | port 0 | <=======> | port 0 | | 192.168.40.2/24 | | 192.168.40.1/24 | +-------------------+ +-------------------+ +-------------------+ +-------------------+ | traffic generator | | UUT | | port 1 | <=======> | port 1 | | 192.168.41.2/24 | | 192.168.41.1/24 | +-------------------+ +-------------------+ Traffic Generator Setup Script ------------------------------ :: set int ip address FortyGigabitEthernet2/0/0 192.168.40.2/24 set int ip address FortyGigabitEthernet2/0/1 192.168.41.2/24 set int state FortyGigabitEthernet2/0/0 up set int state FortyGigabitEthernet2/0/1 up comment { send traffic to the VPP UUT } packet-generator new { name worker0 worker 0 limit 0 rate 1.2e7 size 128-128 tx-interface FortyGigabitEthernet2/0/0 node FortyGigabitEthernet2/0/0-output data { IP4: 1.2.40 -> 3cfd.fed0.b6c8 UDP: 192.168.40.10 -> 192.168.50.10 UDP: 1234 -> 2345 incrementing 114 } } packet-generator new { name worker1 worker 1 limit 0 rate 1.2e7 size 128-128 tx-interface FortyGigabitEthernet2/0/1 node FortyGigabitEthernet2/0/1-output data { IP4: 1.2.4 -> 3cfd.fed0.b6c9 UDP: 192.168.41.10 -> 192.168.51.10 UDP: 1234 -> 2345 incrementing 114 } } comment { delete return traffic on sight } ip route add 192.168.50.0/24 via drop ip route add 192.168.51.0/24 via drop Note 1: the destination MAC addresses shown in the configuration (e.g. 3cfd.fed0.b6c8 and 3cfd.fed0.b6c9) **must** match the vpp UUT port MAC addresses. Note 2: this script assumes that /etc/vpp/startup.conf and/or the command-line in use specifies (at least) two worker threads. Uncomment “workers 2” in the cpu configuration section of /etc/vpp/startup.conf: :: ## Specify a number of workers to be created ## Workers are pinned to N consecutive CPU cores while skipping "skip-cores" CPU core(s) ## and main thread's CPU core workers 2 Any plausible packet generator script - including one which replays pcap captures - can be used. UUT Setup Script ---------------- The vpp UUT uses a couple of static routes to forward traffic back to the traffic generator: :: set int ip address FortyGigabitEthernet2/0/0 192.168.40.1/24 set int ip address FortyGigabitEthernet2/0/1 192.168.41.1/24 set int state FortyGigabitEthernet2/0/0 up set int state FortyGigabitEthernet2/0/1 up ip route add 192.168.50.10/32 via 192.168.41.2 ip route add 192.168.51.10/32 via 192.168.40.2