[linux-block.git] / Documentation / networking / pktgen.txt



                  HOWTO for the linux packet generator
                  ------------------------------------

Enable CONFIG_NET_PKTGEN to compile and build pktgen either in-kernel
or as a module.  A module is preferred; modprobe pktgen if needed.  Once
running, pktgen creates a thread for each CPU with affinity to that CPU.
Monitoring and controlling is done via /proc.  It is easiest to select a
suitable sample script and configure that.

On a dual CPU:

ps aux | grep pkt
root       129  0.3  0.0     0    0 ?        SW    2003 523:20 [pktgen/0]
root       130  0.3  0.0     0    0 ?        SW    2003 509:50 [pktgen/1]


For monitoring and control pktgen creates:
	/proc/net/pktgen/pgctrl
	/proc/net/pktgen/kpktgend_X
        /proc/net/pktgen/ethX


Tuning NIC for max performance
==============================

The default NIC settings are (likely) not tuned for pktgen's artificial
overload type of benchmarking, as this could hurt the normal use-case.

Specifically increasing the TX ring buffer in the NIC:
 # ethtool -G ethX tx 1024

A larger TX ring can improve pktgen's performance, while it can hurt
in the general case, 1) because the TX ring buffer might get larger
than the CPU's L1/L2 cache, 2) because it allows more queueing in the
NIC HW layer (which is bad for bufferbloat).

One should hesitate to conclude that packets/descriptors in the HW
TX ring cause delay.  Drivers usually delay cleaning up the
ring-buffers for various performance reasons, and packets stalling
the TX ring might just be waiting for cleanup.

This cleanup issue is specifically the case for the driver ixgbe
(Intel 82599 chip).  This driver (ixgbe) combines TX+RX ring cleanups,
and the cleanup interval is affected by the ethtool --coalesce setting
of parameter "rx-usecs".

For ixgbe use e.g. "30" resulting in approx 33K interrupts/sec (1/30*10^6):
 # ethtool -C ethX rx-usecs 30


Viewing threads
===============
/proc/net/pktgen/kpktgend_0
Running:
Stopped: eth1
Result: OK: add_device=eth1

Most important are the devices assigned to the thread.  Note that a
device can only belong to one thread.


Viewing devices
===============

The Params section holds configured information.  The Current section
holds running statistics.  The Result is printed after a run or after
interruption.  Example:

/proc/net/pktgen/eth1

Params: count 10000000  min_pkt_size: 60  max_pkt_size: 60
     frags: 0  delay: 0  clone_skb: 1000000  ifname: eth1
     flows: 0 flowlen: 0
     dst_min: 10.10.11.2  dst_max: 
     src_min:   src_max: 
     src_mac: 00:00:00:00:00:00  dst_mac: 00:04:23:AC:FD:82
     udp_src_min: 9  udp_src_max: 9  udp_dst_min: 9  udp_dst_max: 9
     src_mac_count: 0  dst_mac_count: 0 
     Flags: 
Current:
     pkts-sofar: 10000000  errors: 39664
     started: 1103053986245187us  stopped: 1103053999346329us idle: 880401us
     seq_num: 10000011  cur_dst_mac_offset: 0  cur_src_mac_offset: 0
     cur_saddr: 0x10a0a0a  cur_daddr: 0x20b0a0a
     cur_udp_dst: 9  cur_udp_src: 9
     flows: 0
Result: OK: 13101142(c12220741+d880401) usec, 10000000 (60byte,0frags)
  763292pps 390Mb/sec (390805504bps) errors: 39664

Configuring threads and devices
================================
This is done via the /proc interface, and most easily done via pgset
as defined in the sample scripts.

Examples:

 pgset "clone_skb 1"     sets the number of copies of the same packet
 pgset "clone_skb 0"     use single SKB for all transmits
 pgset "burst 8"         uses xmit_more API to queue 8 copies of the same
                         packet and update HW tx queue tail pointer once.
                         "burst 1" is the default
 pgset "pkt_size 9014"   sets packet size to 9014
 pgset "frags 5"         packet will consist of 5 fragments
 pgset "count 200000"    sets number of packets to send, set to zero
                         for continuous sends until explicitly stopped.

 pgset "delay 5000"      adds delay to hard_start_xmit(). nanoseconds

 pgset "dst 10.0.0.1"    sets IP destination address
                         (BEWARE! This generator is very aggressive!)

 pgset "dst_min 10.0.0.1"            Same as dst
 pgset "dst_max 10.0.0.254"          Set the maximum destination IP.
 pgset "src_min 10.0.0.1"            Set the minimum (or only) source IP.
 pgset "src_max 10.0.0.254"          Set the maximum source IP.
 pgset "dst6 fec0::1"     IPV6 destination address
 pgset "src6 fec0::2"     IPV6 source address
 pgset "dstmac 00:00:00:00:00:00"    sets MAC destination address
 pgset "srcmac 00:00:00:00:00:00"    sets MAC source address

 pgset "queue_map_min 0" Sets the min value of tx queue interval
 pgset "queue_map_max 7" Sets the max value of tx queue interval, for multiqueue devices
                         To select queue 1 of a given device,
                         use queue_map_min=1 and queue_map_max=1

 pgset "src_mac_count 1" Sets the number of MACs we'll range through.
                         The 'minimum' MAC is what you set with srcmac.

 pgset "dst_mac_count 1" Sets the number of MACs we'll range through.
                         The 'minimum' MAC is what you set with dstmac.

 pgset "flag [name]"     Set a flag to determine behaviour.  Current flags
                         are: IPSRC_RND # IP source is random (between min/max)
                              IPDST_RND # IP destination is random
                              UDPSRC_RND, UDPDST_RND,
                              MACSRC_RND, MACDST_RND
                              TXSIZE_RND, IPV6,
                              MPLS_RND, VID_RND, SVID_RND
                              FLOW_SEQ,
                              QUEUE_MAP_RND # queue map random
                              QUEUE_MAP_CPU # queue map mirrors smp_processor_id()
                              UDPCSUM,
                              IPSEC # IPsec encapsulation (needs CONFIG_XFRM)
                              NODE_ALLOC # node specific memory allocation
                              NO_TIMESTAMP # disable timestamping

 pgset spi SPI_VALUE     Set specific SA used to transform packet.

 pgset "udp_src_min 9"   set UDP source port min, If < udp_src_max, then
                         cycle through the port range.

 pgset "udp_src_max 9"   set UDP source port max.
 pgset "udp_dst_min 9"   set UDP destination port min, If < udp_dst_max, then
                         cycle through the port range.
 pgset "udp_dst_max 9"   set UDP destination port max.

 pgset "mpls 0001000a,0002000a,0000000a" set MPLS labels (in this example
                                         outer label=16,middle label=32,
					 inner label=0 (IPv4 NULL)) Note that
					 there must be no spaces between the
					 arguments. Leading zeros are required.
					 Do not set the bottom of stack bit,
					 that's done automatically. If you do
					 set the bottom of stack bit, that
					 indicates that you want to randomly
					 generate that address and the flag
					 MPLS_RND will be turned on. You
					 can have any mix of random and fixed
					 labels in the label stack.

 pgset "mpls 0"		  turn off mpls (or any invalid argument works too!)

 pgset "vlan_id 77"       set VLAN ID 0-4095
 pgset "vlan_p 3"         set priority bit 0-7 (default 0)
 pgset "vlan_cfi 0"       set canonical format identifier 0-1 (default 0)

 pgset "svlan_id 22"      set SVLAN ID 0-4095
 pgset "svlan_p 3"        set priority bit 0-7 (default 0)
 pgset "svlan_cfi 0"      set canonical format identifier 0-1 (default 0)

 pgset "vlan_id 9999"     > 4095 remove vlan and svlan tags
 pgset "svlan 9999"       > 4095 remove svlan tag


 pgset "tos XX"           set former IPv4 TOS field (e.g. "tos 28" for AF11 no ECN, default 00)
 pgset "traffic_class XX" set former IPv6 TRAFFIC CLASS (e.g. "traffic_class B8" for EF no ECN, default 00)

 pgset stop    	          aborts injection. Also, ^C aborts generator.

 pgset "rate 300M"        set rate to 300 Mb/s
 pgset "ratep 1000000"    set rate to 1Mpps

 pgset "xmit_mode netif_receive"  RX inject into stack netif_receive_skb()
				  Works with "burst" but not with "clone_skb".
				  Default xmit_mode is "start_xmit".

Sample scripts
==============

A collection of small tutorial scripts for pktgen is in the
samples/pktgen directory:

pktgen.conf-1-1                  # 1 CPU 1 dev 
pktgen.conf-1-2                  # 1 CPU 2 dev
pktgen.conf-2-1                  # 2 CPU's 1 dev 
pktgen.conf-2-2                  # 2 CPU's 2 dev
pktgen.conf-1-1-rdos             # 1 CPU 1 dev w. route DoS 
pktgen.conf-1-1-ip6              # 1 CPU 1 dev ipv6
pktgen.conf-1-1-ip6-rdos         # 1 CPU 1 dev ipv6  w. route DoS
pktgen.conf-1-1-flows            # 1 CPU 1 dev multiple flows.

Run in shell: ./pktgen.conf-X-Y
This does all the setup including sending.


Interrupt affinity
===================
Note that when adding devices to a specific CPU it is a good idea to
also assign /proc/irq/XX/smp_affinity so that the TX interrupts are bound
to the same CPU.  This reduces cache bouncing when freeing skbs.

Enable IPsec
============
Default IPsec transformation with ESP encapsulation plus transport mode
can be enabled by simply setting:

pgset "flag IPSEC"
pgset "flows 1"

To avoid breaking existing testbed scripts for using AH type and tunnel mode,
you can use "pgset spi SPI_VALUE" to specify which transformation mode
to employ.


Current commands and configuration options
==========================================

** Pgcontrol commands:

start
stop

** Thread commands:

add_device
rem_device_all


** Device commands:

count
clone_skb
debug

frags
delay

src_mac_count
dst_mac_count

pkt_size
min_pkt_size
max_pkt_size

mpls

udp_src_min
udp_src_max

udp_dst_min
udp_dst_max

flag
  IPSRC_RND
  IPDST_RND
  UDPSRC_RND
  UDPDST_RND
  MACSRC_RND
  MACDST_RND
  TXSIZE_RND
  IPV6
  MPLS_RND
  VID_RND
  SVID_RND
  FLOW_SEQ
  QUEUE_MAP_RND
  QUEUE_MAP_CPU
  UDPCSUM
  IPSEC
  NODE_ALLOC
  NO_TIMESTAMP

dst_min
dst_max

src_min
src_max

dst_mac
src_mac

clear_counters

dst6
src6

flows
flowlen

rate
ratep

xmit_mode <start_xmit|netif_receive>


References:
ftp://robur.slu.se/pub/Linux/net-development/pktgen-testing/
ftp://robur.slu.se/pub/Linux/net-development/pktgen-testing/examples/

Paper from Linux-Kongress in Erlangen 2004.
ftp://robur.slu.se/pub/Linux/net-development/pktgen-testing/pktgen_paper.pdf

Thanks to:
Grant Grundler for testing on IA-64 and parisc, Harald Welte,  Lennert Buytenhek
Stephen Hemminger, Andi Kleen, Dave Miller and many others.


Good luck with the linux net-development.
Commit	Line	Data
1da177e4 LT	1
1da177e4 LT	2
d012827e	3	HOWTO for the linux packet generator
1da177e4 LT	4	------------------------------------
1da177e4 LT	5
4e081e0c BH	6	Enable CONFIG_NET_PKTGEN to compile and build pktgen either in-kernel
4e081e0c BH	7	or as a module. A module is preferred; modprobe pktgen if needed. Once
ca5b542c BH	8	running, pktgen creates a thread for each CPU with affinity to that CPU.
	9	Monitoring and controlling is done via /proc. It is easiest to select a
	10	suitable sample script and configure that.
1da177e4 LT	11
	12	On a dual CPU:
	13
	14	ps aux \| grep pkt
	15	root 129 0.3 0.0 0 0 ? SW 2003 523:20 [pktgen/0]
	16	root 130 0.3 0.0 0 0 ? SW 2003 509:50 [pktgen/1]
	17
	18
2fe0ae78	19	For monitoring and control pktgen creates:
1da177e4 LT	20	/proc/net/pktgen/pgctrl
	21	/proc/net/pktgen/kpktgend_X
	22	/proc/net/pktgen/ethX
	23
	24
9ceb87fc JDB	25	Tuning NIC for max performance
	26	==============================
	27
ca5b542c	28	The default NIC settings are (likely) not tuned for pktgen's artificial
9ceb87fc JDB	29	overload type of benchmarking, as this could hurt the normal use-case.
	30
	31	Specifically increasing the TX ring buffer in the NIC:
	32	# ethtool -G ethX tx 1024
	33
	34	A larger TX ring can improve pktgen's performance, while it can hurt
	35	in the general case, 1) because the TX ring buffer might get larger
ca5b542c	36	than the CPU's L1/L2 cache, 2) because it allows more queueing in the
9ceb87fc JDB	37	NIC HW layer (which is bad for bufferbloat).
9ceb87fc JDB	38
ca5b542c	39	One should hesitate to conclude that packets/descriptors in the HW
9ceb87fc	40	TX ring cause delay. Drivers usually delay cleaning up the
ca5b542c BH	41	ring-buffers for various performance reasons, and packets stalling
ca5b542c BH	42	the TX ring might just be waiting for cleanup.
9ceb87fc	43
ca5b542c BH	44	This cleanup issue is specifically the case for the driver ixgbe
ca5b542c BH	45	(Intel 82599 chip). This driver (ixgbe) combines TX+RX ring cleanups,
9ceb87fc JDB	46	and the cleanup interval is affected by the ethtool --coalesce setting
	47	of parameter "rx-usecs".
	48
ca5b542c	49	For ixgbe use e.g. "30" resulting in approx 33K interrupts/sec (1/30*10^6):
9ceb87fc JDB	50	# ethtool -C ethX rx-usecs 30
	51
	52
1da177e4 LT	53	Viewing threads
1da177e4 LT	54	===============
d012827e JDB	55	/proc/net/pktgen/kpktgend_0
	56	Running:
	57	Stopped: eth1
	58	Result: OK: add_device=eth1
1da177e4	59
ca5b542c BH	60	Most important are the devices assigned to the thread. Note that a
ca5b542c BH	61	device can only belong to one thread.
1da177e4 LT	62
	63
	64	Viewing devices
	65	===============
	66
ca5b542c BH	67	The Params section holds configured information. The Current section
	68	holds running statistics. The Result is printed after a run or after
	69	interruption. Example:
1da177e4	70
d012827e	71	/proc/net/pktgen/eth1
1da177e4 LT	72
	73	Params: count 10000000 min_pkt_size: 60 max_pkt_size: 60
	74	frags: 0 delay: 0 clone_skb: 1000000 ifname: eth1
	75	flows: 0 flowlen: 0
	76	dst_min: 10.10.11.2 dst_max:
	77	src_min: src_max:
	78	src_mac: 00:00:00:00:00:00 dst_mac: 00:04:23:AC:FD:82
	79	udp_src_min: 9 udp_src_max: 9 udp_dst_min: 9 udp_dst_max: 9
	80	src_mac_count: 0 dst_mac_count: 0
	81	Flags:
	82	Current:
	83	pkts-sofar: 10000000 errors: 39664
	84	started: 1103053986245187us stopped: 1103053999346329us idle: 880401us
	85	seq_num: 10000011 cur_dst_mac_offset: 0 cur_src_mac_offset: 0
	86	cur_saddr: 0x10a0a0a cur_daddr: 0x20b0a0a
	87	cur_udp_dst: 9 cur_udp_src: 9
	88	flows: 0
	89	Result: OK: 13101142(c12220741+d880401) usec, 10000000 (60byte,0frags)
	90	763292pps 390Mb/sec (390805504bps) errors: 39664
	91
5d3f083d ML	92	Configuring threads and devices
5d3f083d ML	93	================================
7c95a9d9 BH	94	This is done via the /proc interface, and most easily done via pgset
7c95a9d9 BH	95	as defined in the sample scripts.
1da177e4 LT	96
	97	Examples:
	98
	99	pgset "clone_skb 1" sets the number of copies of the same packet
	100	pgset "clone_skb 0" use single SKB for all transmits
38b2cf29 AS	101	pgset "burst 8" uses xmit_more API to queue 8 copies of the same
	102	packet and update HW tx queue tail pointer once.
	103	"burst 1" is the default
1da177e4 LT	104	pgset "pkt_size 9014" sets packet size to 9014
	105	pgset "frags 5" packet will consist of 5 fragments
	106	pgset "count 200000" sets number of packets to send, set to zero
d0f19d82	107	for continuous sends until explicitly stopped.
1da177e4 LT	108
	109	pgset "delay 5000" adds delay to hard_start_xmit(). nanoseconds
	110
	111	pgset "dst 10.0.0.1" sets IP destination address
	112	(BEWARE! This generator is very aggressive!)
	113
	114	pgset "dst_min 10.0.0.1" Same as dst
	115	pgset "dst_max 10.0.0.254" Set the maximum destination IP.
	116	pgset "src_min 10.0.0.1" Set the minimum (or only) source IP.
	117	pgset "src_max 10.0.0.254" Set the maximum source IP.
	118	pgset "dst6 fec0::1" IPV6 destination address
	119	pgset "src6 fec0::2" IPV6 source address
	120	pgset "dstmac 00:00:00:00:00:00" sets MAC destination address
	121	pgset "srcmac 00:00:00:00:00:00" sets MAC source address
	122
896a7cf8 ED	123	pgset "queue_map_min 0" Sets the min value of tx queue interval
	124	pgset "queue_map_max 7" Sets the max value of tx queue interval, for multiqueue devices
	125	To select queue 1 of a given device,
	126	use queue_map_min=1 and queue_map_max=1
	127
d012827e	128	pgset "src_mac_count 1" Sets the number of MACs we'll range through.
1da177e4 LT	129	The 'minimum' MAC is what you set with srcmac.
	130
	131	pgset "dst_mac_count 1" Sets the number of MACs we'll range through.
	132	The 'minimum' MAC is what you set with dstmac.
	133
	134	pgset "flag [name]" Set a flag to determine behaviour. Current flags
72f8e06f MK	135	are: IPSRC_RND # IP source is random (between min/max)
	136	IPDST_RND # IP destination is random
	137	UDPSRC_RND, UDPDST_RND,
	138	MACSRC_RND, MACDST_RND
	139	TXSIZE_RND, IPV6,
f0e82fd0	140	MPLS_RND, VID_RND, SVID_RND
72f8e06f	141	FLOW_SEQ,
896a7cf8 ED	142	QUEUE_MAP_RND # queue map random
896a7cf8 ED	143	QUEUE_MAP_CPU # queue map mirrors smp_processor_id()
72f8e06f MK	144	UDPCSUM,
	145	IPSEC # IPsec encapsulation (needs CONFIG_XFRM)
	146	NODE_ALLOC # node specific memory allocation
f1f00d8f	147	NO_TIMESTAMP # disable timestamping
896a7cf8	148
e5f79d11	149	pgset spi SPI_VALUE Set specific SA used to transform packet.
1da177e4 LT	150
	151	pgset "udp_src_min 9" set UDP source port min, If < udp_src_max, then
	152	cycle through the port range.
	153
	154	pgset "udp_src_max 9" set UDP source port max.
	155	pgset "udp_dst_min 9" set UDP destination port min, If < udp_dst_max, then
	156	cycle through the port range.
	157	pgset "udp_dst_max 9" set UDP destination port max.
	158
ca6549af SW	159	pgset "mpls 0001000a,0002000a,0000000a" set MPLS labels (in this example
	160	outer label=16,middle label=32,
	161	inner label=0 (IPv4 NULL)) Note that
	162	there must be no spaces between the
	163	arguments. Leading zeros are required.
	164	Do not set the bottom of stack bit,
fa00e7e1	165	that's done automatically. If you do
ca6549af SW	166	set the bottom of stack bit, that
	167	indicates that you want to randomly
	168	generate that address and the flag
	169	MPLS_RND will be turned on. You
	170	can have any mix of random and fixed
	171	labels in the label stack.
	172
	173	pgset "mpls 0" turn off mpls (or any invalid argument works too!)
	174
f0e82fd0 FF	175	pgset "vlan_id 77" set VLAN ID 0-4095
	176	pgset "vlan_p 3" set priority bit 0-7 (default 0)
	177	pgset "vlan_cfi 0" set canonical format identifier 0-1 (default 0)
	178
	179	pgset "svlan_id 22" set SVLAN ID 0-4095
	180	pgset "svlan_p 3" set priority bit 0-7 (default 0)
	181	pgset "svlan_cfi 0" set canonical format identifier 0-1 (default 0)
	182
	183	pgset "vlan_id 9999" > 4095 remove vlan and svlan tags
	184	pgset "svlan 9999" > 4095 remove svlan tag
	185
	186
	187	pgset "tos XX" set former IPv4 TOS field (e.g. "tos 28" for AF11 no ECN, default 00)
	188	pgset "traffic_class XX" set former IPv6 TRAFFIC CLASS (e.g. "traffic_class B8" for EF no ECN, default 00)
	189
1da177e4 LT	190	pgset stop aborts injection. Also, ^C aborts generator.
1da177e4 LT	191
43d28b65 DT	192	pgset "rate 300M" set rate to 300 Mb/s
43d28b65 DT	193	pgset "ratep 1000000" set rate to 1Mpps
1da177e4	194
62f64aed AS	195	pgset "xmit_mode netif_receive" RX inject into stack netif_receive_skb()
	196	Works with "burst" but not with "clone_skb".
	197	Default xmit_mode is "start_xmit".
	198
7c95a9d9 BH	199	Sample scripts
7c95a9d9 BH	200	==============
1da177e4	201
7c95a9d9 BH	202	A collection of small tutorial scripts for pktgen is in the
7c95a9d9 BH	203	samples/pktgen directory:
1da177e4 LT	204
	205	pktgen.conf-1-1 # 1 CPU 1 dev
	206	pktgen.conf-1-2 # 1 CPU 2 dev
	207	pktgen.conf-2-1 # 2 CPU's 1 dev
	208	pktgen.conf-2-2 # 2 CPU's 2 dev
	209	pktgen.conf-1-1-rdos # 1 CPU 1 dev w. route DoS
	210	pktgen.conf-1-1-ip6 # 1 CPU 1 dev ipv6
	211	pktgen.conf-1-1-ip6-rdos # 1 CPU 1 dev ipv6 w. route DoS
	212	pktgen.conf-1-1-flows # 1 CPU 1 dev multiple flows.
	213
ca5b542c BH	214	Run in shell: ./pktgen.conf-X-Y
ca5b542c BH	215	This does all the setup including sending.
1da177e4 LT	216
	217
	218	Interrupt affinity
	219	===================
ca5b542c BH	220	Note that when adding devices to a specific CPU it is a good idea to
	221	also assign /proc/irq/XX/smp_affinity so that the TX interrupts are bound
	222	to the same CPU. This reduces cache bouncing when freeing skbs.
1da177e4	223
e5f79d11 FD	224	Enable IPsec
e5f79d11 FD	225	============
ca5b542c BH	226	Default IPsec transformation with ESP encapsulation plus transport mode
ca5b542c BH	227	can be enabled by simply setting:
e5f79d11 FD	228
	229	pgset "flag IPSEC"
	230	pgset "flows 1"
	231
	232	To avoid breaking existing testbed scripts for using AH type and tunnel mode,
ca5b542c	233	you can use "pgset spi SPI_VALUE" to specify which transformation mode
e5f79d11 FD	234	to employ.
e5f79d11 FD	235
1da177e4 LT	236
	237	Current commands and configuration options
	238	==========================================
	239
	240	** Pgcontrol commands:
	241
	242	start
	243	stop
	244
	245	** Thread commands:
	246
	247	add_device
	248	rem_device_all
1da177e4 LT	249
	250
	251	** Device commands:
	252
	253	count
	254	clone_skb
	255	debug
	256
	257	frags
	258	delay
	259
	260	src_mac_count
	261	dst_mac_count
	262
d012827e	263	pkt_size
1da177e4 LT	264	min_pkt_size
	265	max_pkt_size
	266
ca6549af SW	267	mpls
ca6549af SW	268
1da177e4 LT	269	udp_src_min
	270	udp_src_max
	271
	272	udp_dst_min
	273	udp_dst_max
	274
	275	flag
	276	IPSRC_RND
1da177e4 LT	277	IPDST_RND
	278	UDPSRC_RND
	279	UDPDST_RND
	280	MACSRC_RND
	281	MACDST_RND
72f8e06f MK	282	TXSIZE_RND
	283	IPV6
	284	MPLS_RND
	285	VID_RND
	286	SVID_RND
	287	FLOW_SEQ
	288	QUEUE_MAP_RND
	289	QUEUE_MAP_CPU
	290	UDPCSUM
e5f79d11	291	IPSEC
72f8e06f	292	NODE_ALLOC
f1f00d8f	293	NO_TIMESTAMP
1da177e4 LT	294
	295	dst_min
	296	dst_max
	297
	298	src_min
	299	src_max
	300
	301	dst_mac
	302	src_mac
	303
	304	clear_counters
	305
	306	dst6
	307	src6
	308
	309	flows
	310	flowlen
	311
43d28b65 DT	312	rate
	313	ratep
	314
62f64aed AS	315	xmit_mode <start_xmit\|netif_receive>
	316
	317
1da177e4 LT	318	References:
	319	ftp://robur.slu.se/pub/Linux/net-development/pktgen-testing/
	320	ftp://robur.slu.se/pub/Linux/net-development/pktgen-testing/examples/
	321
	322	Paper from Linux-Kongress in Erlangen 2004.
	323	ftp://robur.slu.se/pub/Linux/net-development/pktgen-testing/pktgen_paper.pdf
	324
	325	Thanks to:
	326	Grant Grundler for testing on IA-64 and parisc, Harald Welte, Lennert Buytenhek
	327	Stephen Hemminger, Andi Kleen, Dave Miller and many others.
	328
	329
ca6549af	330	Good luck with the linux net-development.