6 This tutorial shows how to use VPP use iperf3 and Trex to get some basic peformance
7 numbers from a few basic configurations. Four examples are shown. In the first two
8 examples, the **iperf3** tool is used to generate traffic, and in the last two examples
9 the Cisco's `TRex Realistic Traffic Generator <http://trex-tgn.cisco.com/>`_ is used. For
10 comparison purposes, the first example shows packet forwarding using ordinary kernel
11 IP forwarding, and the second example shows packet forwarding using VPP.
13 Three Intel Xeon processor platform systems are used to connect to the VPP host to pass traffic
14 using **iperf3** and Cisco’s `TRex <http://trex-tgn.cisco.com/>`_.
16 Intel 40 Gigabit Ethernet (GbE) network interface cards (NICs) are used to connect the hosts.
19 Using Kernel Packet Forwarding with Iperf3
20 ===========================================
22 In this test, 40 GbE Intel Ethernet Network Adapters are used to connect the three
23 systems. Figure 1 illustrates this configuration.
25 .. figure:: /_images/iperf3fig1.png
27 Figure 1: VPP runs on a host that connects to two other systems via 40 GbE NICs.
29 For comparison purposes, in the first example, we configure kernel forwarding in
30 *csp2s22c03* and use the **iperf3** tool to measure network bandwidth between
31 *csp2s22c03* and *net2s22c05*.
33 In the second example, we start the VPP engine in *csp2s22c03* instead of using
34 kernel forwarding. On *csp2s22c03*, we configure the system to have the addresses
35 10.10.1.1/24 and 10.10.2.1/24 on the two 40-GbE NICs. To find all network interfaces
36 available on the system, use the lshw Linux command to list all network interfaces
37 and the corresponding slots *[0000:xx:yy.z]*.
39 In this example, the 40-GbE interfaces are *ens802f0* and *ens802f1*.
41 .. code-block:: console
43 csp2s22c03$ sudo lshw -class network -businfo
44 Bus info Device Class Description
45 ========================================================
46 pci@0000:03:00.0 enp3s0f0 network Ethernet Controller 10-Gig
47 pci@0000:03:00.1 enp3s0f1 network Ethernet Controller 10-Gig
48 pci@0000:82:00.0 ens802f0 network Ethernet Controller XL710
49 pci@0000:82:00.1 ens802f1 network Ethernet Controller XL710
50 pci@0000:82:00.0 ens802f0d1 network Ethernet interface
51 pci@0000:82:00.1 ens802f1d1 network Ethernet interface
54 Configure the system *csp2s22c03* to have 10.10.1.1 and 10.10.2.1 on the two 40-GbE NICs
55 *ens802f0* and *ens802f1*, respectively.
57 .. code-block:: console
59 csp2s22c03$ sudo ip addr add 10.10.1.1/24 dev ens802f0
60 csp2s22c03$ sudo ip link set dev ens802f0 up
61 csp2s22c03$ sudo ip addr add 10.10.2.1/24 dev ens802f1
62 csp2s22c03$ sudo ip link set dev ens802f1 up
66 .. code-block:: console
69 Kernel IP routing table
70 Destination Gateway Genmask Flags Metric Ref Use Iface
71 default jf111-ldr1a-530 0.0.0.0 UG 0 0 0 enp3s0f1
72 default 192.168.0.50 0.0.0.0 UG 100 0 0 enp3s0f0
73 10.10.1.0 * 255.255.255.0 U 0 0 0 ens802f0
74 10.10.2.0 * 255.255.255.0 U 0 0 0 ens802f1
75 10.23.3.0 * 255.255.255.0 U 0 0 0 enp3s0f1
76 link-local * 255.255.0.0 U 1000 0 0 enp3s0f1
77 192.168.0.0 * 255.255.255.0 U 100 0 0 enp3s0f0
79 .. code-block:: console
82 default via 10.23.3.1 dev enp3s0f1
83 default via 192.168.0.50 dev enp3s0f0 proto static metric 100
84 10.10.1.0/24 dev ens802f0 proto kernel scope link src 10.10.1.1
85 10.10.2.0/24 dev ens802f1 proto kernel scope link src 10.10.2.1
86 10.23.3.0/24 dev enp3s0f1 proto kernel scope link src 10.23.3.67
87 169.254.0.0/16 dev enp3s0f1 scope link metric 1000
88 192.168.0.0/24 dev enp3s0f0 proto kernel scope link src 192.168.0.142 metric 100
90 On *csp2s22c04*, we configure the system to have the address 10.10.1.2 and use
91 the interface *ens802* to route IP packets 10.10.2.0/24. Use the lshw Linux
92 command to list all network interfaces and the corresponding slots *[0000:xx:yy.z]*.
94 For example, the interface *ens802d1* *(ens802)* is connected to slot *[82:00.0]*:
96 .. code-block:: console
98 csp2s22c04$ sudo lshw -class network -businfo
99 Bus info Device Class Description
100 =====================================================
101 pci@0000:03:00.0 enp3s0f0 network Ethernet Controller 10-Gigabit X540-AT2
102 pci@0000:03:00.1 enp3s0f1 network Ethernet Controller 10-Gigabit X540-AT2
103 pci@0000:82:00.0 ens802d1 network Ethernet Controller XL710 for 40GbE QSFP+
104 pci@0000:82:00.0 ens802 network Ethernet interface
106 For kernel forwarding, set 10.10.1.2 to the interface *ens802*, and add a static
107 route for IP packet 10.10.2.0/24:
109 .. code-block:: console
111 csp2s22c04$ sudo ip addr add 10.10.1.2/24 dev ens802
112 csp2s22c04$ sudo ip link set dev ens802 up
113 csp2s22c04$ sudo ip route add 10.10.2.0/24 via 10.10.1.1
115 .. code-block:: console
118 enp3s0f0 Link encap:Ethernet HWaddr a4:bf:01:00:92:73
119 inet addr:10.23.3.62 Bcast:10.23.3.255 Mask:255.255.255.0
120 inet6 addr: fe80::a6bf:1ff:fe00:9273/64 Scope:Link
121 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
122 RX packets:3411 errors:0 dropped:0 overruns:0 frame:0
123 TX packets:1179 errors:0 dropped:0 overruns:0 carrier:0
124 collisions:0 txqueuelen:1000
125 RX bytes:262230 (262.2 KB) TX bytes:139975 (139.9 KB)
127 ens802 Link encap:Ethernet HWaddr 68:05:ca:2e:76:e0
128 inet addr:10.10.1.2 Bcast:0.0.0.0 Mask:255.255.255.0
129 inet6 addr: fe80::6a05:caff:fe2e:76e0/64 Scope:Link
130 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
131 RX packets:0 errors:0 dropped:0 overruns:0 frame:0
132 TX packets:40 errors:0 dropped:0 overruns:0 carrier:0
133 collisions:0 txqueuelen:1000
134 RX bytes:0 (0.0 B) TX bytes:5480 (5.4 KB)
136 lo Link encap:Local Loopback
137 inet addr:127.0.0.1 Mask:255.0.0.0
138 inet6 addr: ::1/128 Scope:Host
139 UP LOOPBACK RUNNING MTU:65536 Metric:1
140 RX packets:31320 errors:0 dropped:0 overruns:0 frame:0
141 TX packets:31320 errors:0 dropped:0 overruns:0 carrier:0
142 collisions:0 txqueuelen:1
143 RX bytes:40301788 (40.3 MB) TX bytes:40301788 (40.3 MB)
145 After setting the route, we can ping from *csp2s22c03* to *csp2s22c04*, and vice versa:
147 .. code-block:: console
149 csp2s22c03$ ping 10.10.1.2 -c 3
150 PING 10.10.1.2 (10.10.1.2) 56(84) bytes of data.
151 64 bytes from 10.10.1.2: icmp_seq=1 ttl=64 time=0.122 ms
152 64 bytes from 10.10.1.2: icmp_seq=2 ttl=64 time=0.109 ms
153 64 bytes from 10.10.1.2: icmp_seq=3 ttl=64 time=0.120 ms
155 .. code-block:: console
157 csp2s22c04$ ping 10.10.1.1 -c 3
158 PING 10.10.1.1 (10.10.1.1) 56(84) bytes of data.
159 64 bytes from 10.10.1.1: icmp_seq=1 ttl=64 time=0.158 ms
160 64 bytes from 10.10.1.1: icmp_seq=2 ttl=64 time=0.096 ms
161 64 bytes from 10.10.1.1: icmp_seq=3 ttl=64 time=0.102 ms
163 Similarly, on *net2s22c05*, we configure the system to have the address *10.10.2.2*
164 and use the interface *ens803f0* to route IP packets *10.10.1.0/24*. Use the lshw
165 Linux command to list all network interfaces and the corresponding slots
166 *[0000:xx:yy.z]*. For example, the interface *ens803f0* is connected to slot *[87:00.0]*:
168 .. code-block:: console
170 NET2S22C05$ sudo lshw -class network -businfo
171 Bus info Device Class Description
172 ========================================================
173 pci@0000:03:00.0 enp3s0f0 network Ethernet Controller 10-Gigabit X540-AT2
174 pci@0000:03:00.1 enp3s0f1 network Ethernet Controller 10-Gigabit X540-AT2
175 pci@0000:81:00.0 ens787f0 network 82599 10 Gigabit TN Network Connection
176 pci@0000:81:00.1 ens787f1 network 82599 10 Gigabit TN Network Connection
177 pci@0000:87:00.0 ens803f0 network Ethernet Controller XL710 for 40GbE QSFP+
178 pci@0000:87:00.1 ens803f1 network Ethernet Controller XL710 for 40GbE QSFP+
180 For kernel forwarding, set 10.10.2.2 to the interface ens803f0, and add a static
181 route for IP packet 10.10.1.0/24:
183 .. code-block:: console
185 NET2S22C05$ sudo ip addr add 10.10.2.2/24 dev ens803f0
186 NET2S22C05$ sudo ip link set dev ens803f0 up
187 NET2S22C05$ sudo ip route add 10.10.1.0/24 via 10.10.2.1
189 After setting the route, you can ping from *csp2s22c03* to *net2s22c05*, and vice
190 versa. However, in order to ping between *net2s22c05* and *csp2s22c04*, kernel IP
191 forwarding in *csp2s22c03* has to be enabled:
193 .. code-block:: console
195 csp2s22c03$ sysctl net.ipv4.ip_forward
196 net.ipv4.ip_forward = 0
197 csp2s22c03$ echo 1 | sudo tee /proc/sys/net/ipv4/ip_forward
198 csp2s22c03$ sysctl net.ipv4.ip_forward
199 net.ipv4.ip_forward = 1
201 If successful, verify that now you can ping between *net2s22c05* and *csp2s22c04*:
203 .. code-block:: console
205 NET2S22C05$ ping 10.10.1.2 -c 3
206 PING 10.10.1.2 (10.10.1.2) 56(84) bytes of data.
207 64 bytes from 10.10.1.2: icmp_seq=1 ttl=63 time=0.239 ms
208 64 bytes from 10.10.1.2: icmp_seq=2 ttl=63 time=0.224 ms
209 64 bytes from 10.10.1.2: icmp_seq=3 ttl=63 time=0.230 ms
211 We use the **iperf3** utility to measure network bandwidth between hosts. In this
212 test, we download the **iperf3** utility tool on both *net2s22c05* and *csp2s22c04*.
213 On *csp2s22c04*, we start the **iperf3** server with “iperf3 –s”, and then on *net2s22c05*,
214 we start the **iperf3** client to connect to the server:
216 .. code-block:: console
218 NET2S22C05$ iperf3 -c 10.10.1.2
219 Connecting to host 10.10.1.2, port 5201
220 [ 4] local 10.10.2.2 port 54074 connected to 10.10.1.2 port 5201
221 [ ID] Interval Transfer Bandwidth Retr Cwnd
222 [ 4] 0.00-1.00 sec 936 MBytes 7.85 Gbits/sec 2120 447 KBytes
223 [ 4] 1.00-2.00 sec 952 MBytes 7.99 Gbits/sec 1491 611 KBytes
224 [ 4] 2.00-3.00 sec 949 MBytes 7.96 Gbits/sec 2309 604 KBytes
225 [ 4] 3.00-4.00 sec 965 MBytes 8.10 Gbits/sec 1786 571 KBytes
226 [ 4] 4.00-5.00 sec 945 MBytes 7.93 Gbits/sec 1984 424 KBytes
227 [ 4] 5.00-6.00 sec 946 MBytes 7.94 Gbits/sec 1764 611 KBytes
228 [ 4] 6.00-7.00 sec 979 MBytes 8.21 Gbits/sec 1499 655 KBytes
229 [ 4] 7.00-8.00 sec 980 MBytes 8.22 Gbits/sec 1182 867 KBytes
230 [ 4] 8.00-9.00 sec 1008 MBytes 8.45 Gbits/sec 945 625 KBytes
231 [ 4] 9.00-10.00 sec 1015 MBytes 8.51 Gbits/sec 1394 611 KBytes
232 - - - - - - - - - - - - - - - - - - - - - - - - -
233 [ ID] Interval Transfer Bandwidth Retr
234 [ 4] 0.00-10.00 sec 9.45 GBytes 8.12 Gbits/sec 16474 sender
235 [ 4] 0.00-10.00 sec 9.44 GBytes 8.11 Gbits/sec receiver