3 HOWTO for the linux packet generator
4 ------------------------------------
8 Enable CONFIG_NET_PKTGEN to compile and build pktgen.o either in kernel
9 or as module. Module is preferred. insmod pktgen if needed. Once running
10 pktgen creates a thread on each CPU where each thread has affinity to its CPU.
11 Monitoring and controlling is done via /proc. Easiest to select a suitable
12 a sample script and configure.
17 root 129 0.3 0.0 0 0 ? SW 2003 523:20 [pktgen/0]
18 root 130 0.3 0.0 0 0 ? SW 2003 509:50 [pktgen/1]
21 For monitoring and control pktgen creates:
22 /proc/net/pktgen/pgctrl
23 /proc/net/pktgen/kpktgend_X
29 /proc/net/pktgen/kpktgend_0
30 Name: kpktgend_0 max_before_softirq: 10000
33 Result: OK: max_before_softirq=10000
35 Most important the devices assigned to thread. Note! A device can only belong
42 Parm section holds configured info. Current hold running stats.
43 Result is printed after run or after interruption. Example:
47 Params: count 10000000 min_pkt_size: 60 max_pkt_size: 60
48 frags: 0 delay: 0 clone_skb: 1000000 ifname: eth1
50 dst_min: 10.10.11.2 dst_max:
52 src_mac: 00:00:00:00:00:00 dst_mac: 00:04:23:AC:FD:82
53 udp_src_min: 9 udp_src_max: 9 udp_dst_min: 9 udp_dst_max: 9
54 src_mac_count: 0 dst_mac_count: 0
57 pkts-sofar: 10000000 errors: 39664
58 started: 1103053986245187us stopped: 1103053999346329us idle: 880401us
59 seq_num: 10000011 cur_dst_mac_offset: 0 cur_src_mac_offset: 0
60 cur_saddr: 0x10a0a0a cur_daddr: 0x20b0a0a
61 cur_udp_dst: 9 cur_udp_src: 9
63 Result: OK: 13101142(c12220741+d880401) usec, 10000000 (60byte,0frags)
64 763292pps 390Mb/sec (390805504bps) errors: 39664
66 Configuring threads and devices
67 ================================
68 This is done via the /proc interface easiest done via pgset in the scripts
72 pgset "clone_skb 1" sets the number of copies of the same packet
73 pgset "clone_skb 0" use single SKB for all transmits
74 pgset "pkt_size 9014" sets packet size to 9014
75 pgset "frags 5" packet will consist of 5 fragments
76 pgset "count 200000" sets number of packets to send, set to zero
77 for continuous sends until explicitly stopped.
79 pgset "delay 5000" adds delay to hard_start_xmit(). nanoseconds
81 pgset "dst 10.0.0.1" sets IP destination address
82 (BEWARE! This generator is very aggressive!)
84 pgset "dst_min 10.0.0.1" Same as dst
85 pgset "dst_max 10.0.0.254" Set the maximum destination IP.
86 pgset "src_min 10.0.0.1" Set the minimum (or only) source IP.
87 pgset "src_max 10.0.0.254" Set the maximum source IP.
88 pgset "dst6 fec0::1" IPV6 destination address
89 pgset "src6 fec0::2" IPV6 source address
90 pgset "dstmac 00:00:00:00:00:00" sets MAC destination address
91 pgset "srcmac 00:00:00:00:00:00" sets MAC source address
93 pgset "queue_map_min 0" Sets the min value of tx queue interval
94 pgset "queue_map_max 7" Sets the max value of tx queue interval, for multiqueue devices
95 To select queue 1 of a given device,
96 use queue_map_min=1 and queue_map_max=1
98 pgset "src_mac_count 1" Sets the number of MACs we'll range through.
99 The 'minimum' MAC is what you set with srcmac.
101 pgset "dst_mac_count 1" Sets the number of MACs we'll range through.
102 The 'minimum' MAC is what you set with dstmac.
104 pgset "flag [name]" Set a flag to determine behaviour. Current flags
105 are: IPSRC_RND # IP source is random (between min/max)
106 IPDST_RND # IP destination is random
107 UDPSRC_RND, UDPDST_RND,
108 MACSRC_RND, MACDST_RND
110 MPLS_RND, VID_RND, SVID_RND
112 QUEUE_MAP_RND # queue map random
113 QUEUE_MAP_CPU # queue map mirrors smp_processor_id()
115 IPSEC # IPsec encapsulation (needs CONFIG_XFRM)
116 NODE_ALLOC # node specific memory allocation
118 pgset spi SPI_VALUE Set specific SA used to transform packet.
120 pgset "udp_src_min 9" set UDP source port min, If < udp_src_max, then
121 cycle through the port range.
123 pgset "udp_src_max 9" set UDP source port max.
124 pgset "udp_dst_min 9" set UDP destination port min, If < udp_dst_max, then
125 cycle through the port range.
126 pgset "udp_dst_max 9" set UDP destination port max.
128 pgset "mpls 0001000a,0002000a,0000000a" set MPLS labels (in this example
129 outer label=16,middle label=32,
130 inner label=0 (IPv4 NULL)) Note that
131 there must be no spaces between the
132 arguments. Leading zeros are required.
133 Do not set the bottom of stack bit,
134 that's done automatically. If you do
135 set the bottom of stack bit, that
136 indicates that you want to randomly
137 generate that address and the flag
138 MPLS_RND will be turned on. You
139 can have any mix of random and fixed
140 labels in the label stack.
142 pgset "mpls 0" turn off mpls (or any invalid argument works too!)
144 pgset "vlan_id 77" set VLAN ID 0-4095
145 pgset "vlan_p 3" set priority bit 0-7 (default 0)
146 pgset "vlan_cfi 0" set canonical format identifier 0-1 (default 0)
148 pgset "svlan_id 22" set SVLAN ID 0-4095
149 pgset "svlan_p 3" set priority bit 0-7 (default 0)
150 pgset "svlan_cfi 0" set canonical format identifier 0-1 (default 0)
152 pgset "vlan_id 9999" > 4095 remove vlan and svlan tags
153 pgset "svlan 9999" > 4095 remove svlan tag
156 pgset "tos XX" set former IPv4 TOS field (e.g. "tos 28" for AF11 no ECN, default 00)
157 pgset "traffic_class XX" set former IPv6 TRAFFIC CLASS (e.g. "traffic_class B8" for EF no ECN, default 00)
159 pgset stop aborts injection. Also, ^C aborts generator.
161 pgset "rate 300M" set rate to 300 Mb/s
162 pgset "ratep 1000000" set rate to 1Mpps
167 A collection of small tutorial scripts for pktgen is in examples dir.
169 pktgen.conf-1-1 # 1 CPU 1 dev
170 pktgen.conf-1-2 # 1 CPU 2 dev
171 pktgen.conf-2-1 # 2 CPU's 1 dev
172 pktgen.conf-2-2 # 2 CPU's 2 dev
173 pktgen.conf-1-1-rdos # 1 CPU 1 dev w. route DoS
174 pktgen.conf-1-1-ip6 # 1 CPU 1 dev ipv6
175 pktgen.conf-1-1-ip6-rdos # 1 CPU 1 dev ipv6 w. route DoS
176 pktgen.conf-1-1-flows # 1 CPU 1 dev multiple flows.
178 Run in shell: ./pktgen.conf-X-Y It does all the setup including sending.
183 Note when adding devices to a specific CPU there good idea to also assign
184 /proc/irq/XX/smp_affinity so the TX-interrupts gets bound to the same CPU.
185 as this reduces cache bouncing when freeing skb's.
189 Default IPsec transformation with ESP encapsulation plus Transport mode
190 could be enabled by simply setting:
195 To avoid breaking existing testbed scripts for using AH type and tunnel mode,
196 user could use "pgset spi SPI_VALUE" to specify which formal of transformation
200 Current commands and configuration options
201 ==========================================
203 ** Pgcontrol commands:
279 ftp://robur.slu.se/pub/Linux/net-development/pktgen-testing/
280 ftp://robur.slu.se/pub/Linux/net-development/pktgen-testing/examples/
282 Paper from Linux-Kongress in Erlangen 2004.
283 ftp://robur.slu.se/pub/Linux/net-development/pktgen-testing/pktgen_paper.pdf
286 Grant Grundler for testing on IA-64 and parisc, Harald Welte, Lennert Buytenhek
287 Stephen Hemminger, Andi Kleen, Dave Miller and many others.
290 Good luck with the linux net-development.