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tcpreplay-edit(1)		 User Commands		     tcpreplay-edit(1)

NAME
       tcpreplay-edit -	Replay network traffic stored in pcap files

SYNOPSIS
       tcpreplay-edit  [-flags]	 [-flag	 [value]]  [--option-name[[=| ]value]]
       <pcap_file(s)>

       tcpreplay is a tool for replaying network traffic from files saved with
       tcpdump or other	tools which write pcap(3) files.

DESCRIPTION
       The  basic operation of tcpreplay is to resend  all  packets  from  the
       input file(s) at	the speed at which they	were recorded, or a  specified
       data rate, up to	as fast	as the hardware	is capable.

       Optionally, the traffic can be split between two	interfaces, written to
       files, filtered and edited in various ways, providing the means to test
       firewalls, NIDS and other network devices.

       For  more  details,  please  see	the Tcpreplay Manual at: http://tcpre-
       play.appneta.com

OPTIONS

       -r string, --portmap=string
	      Rewrite TCP/UDP ports.  This option may appear up	to 9999	times.

	      Specify a	list of	comma delimited	port  mappings	consisting  of
	      colon  delimited	port  number pairs.  Each colon	delimited port
	      pair consists of the port	to match followed by the  port	number
	      to rewrite.

	      Examples:
		  --portmap=80:8000 --portmap=8080:80	 # 80->8000 and	8080->80
		  --portmap=8000,8080,88888:80		 # 3 different ports become 80
		  --portmap=8000-8999:80		 # ports 8000 to 8999 become 80

       -s number, --seed=number
	      Randomize	 src/dst IPv4/v6 addresses w/ given seed.  This	option
	      may appear up to 1 times.	 This option must not appear in	combi-
	      nation  with  any	of the following options: fuzz-seed.  This op-
	      tion takes an integer number as its argument.

	      Causes the source	and destination	IPv4/v6	addresses to be	pseudo
	      randomized   but	still  maintain	 client/server	relationships.
	      Since the	randomization is deterministic based on	the seed,  you
	      can reuse	the same seed value to recreate	the traffic.

       -N string, --pnat=string
	      Rewrite IPv4/v6 addresses	using pseudo-NAT.  This	option may ap-
	      pear up to 2 times.  This	option must not	appear in  combination
	      with any of the following	options: srcipmap.

	      Takes  a comma delimited series of colon delimited CIDR netblock
	      pairs.  Each netblock pair is evaluated in order against the  IP
	      addresses.   If  the  IP address in the packet matches the first
	      netblock,	it is rewritten	using the second netblock  as  a  mask
	      against the high order bits.

	      IPv4 Example:
		  --pnat=192.168.0.0/16:10.77.0.0/16,172.16.0.0/12:10.1.0.0/24
	      IPv6 Example:
		  --pnat=[2001:db8::/32]:[dead::/16],[2001:db8::/32]:[::ffff:0:0/96]

       -S string, --srcipmap=string
	      Rewrite  source IPv4/v6 addresses	using pseudo-NAT.  This	option
	      may appear up to 1 times.	 This option must not appear in	combi-
	      nation with any of the following options:	pnat.

	      Works  just  like	the --pnat option, but only affects the	source
	      IP addresses in the IPv4/v6 header.

       -D string, --dstipmap=string
	      Rewrite destination IPv4/v6 addresses  using  pseudo-NAT.	  This
	      option may appear	up to 1	times.	This option must not appear in
	      combination with any of the following options: pnat.

	      Works just like the --pnat option, but only affects the destina-
	      tion IP addresses	in the IPv4/v6 header.

       -e string, --endpoints=string
	      Rewrite  IP  addresses to	be between two endpoints.  This	option
	      may appear up to 1 times.	 This option must appear  in  combina-
	      tion with	the following options: cachefile.

	      Takes  a pair of colon delimited IPv4/v6 addresses which will be
	      used to rewrite all traffic to appear to be between the  two  IP
	      addresses.

	      IPv4 Example:
		  --endpoints=172.16.0.1:172.16.0.2
	      IPv6 Example:
		  --endpoints=[2001:db8::dead:beef]:[::ffff:0:0:ac:f:0:2]

       --tcp-sequence=number
	      Change  TCP  Sequence (and ACK) numbers /w given seed.  This op-
	      tion takes an integer number as its argument.  The value of num-
	      ber is constrained to being:
		  greater than or equal	to 1
	      The default number for this option is:
		   0

	      Change all TCP sequence numbers, and related sequence-acknowl-
	      edgement numbers.	 They will be shifted by a random amount based
	      on the provided seed.

       -b, --skipbroadcast
	      Skip rewriting broadcast/multicast IPv4/v6 addresses.

	      By default --seed, --pnat	and --endpoints	will rewrite broadcast
	      and multicast IPv4/v6 and	MAC addresses. Setting this flag will
	      keep broadcast/multicast IPv4/v6 and MAC addresses from being
	      rewritten.

       -C, --fixcsum
	      Force recalculation of IPv4/TCP/UDP header checksums.

	      Causes each IPv4/v6 packet to have their checksums recalculated
	      and fixed.  Automatically	enabled	for packets modified with
	      --seed, --pnat, --endpoints or --fixlen.

       -m number, --mtu=number
	      Override default MTU length (1500	bytes).	 This option may ap-
	      pear up to 1 times.  This	option takes an	integer	number as its
	      argument.	 The value of number is	constrained to being:
		  in the range	1 through MAX_SNAPLEN

	      Override the default 1500	byte MTU size for determining the max-
	      imum padding length (--fixlen=pad) or when truncating (--mtu-
	      trunc).

       --mtu-trunc
	      Truncate packets larger then specified MTU.  This	option may ap-
	      pear up to 1 times.

	      Similar to --fixlen, this	option will truncate data in packets
	      from Layer 3 and above to	be no larger then the MTU.

       -E, --efcs
	      Remove Ethernet checksums	(FCS) from end of frames.

	      Note, this option	is pretty dangerous!  We do not	actually check
	      to see if	a FCS actually exists in the frame, we just blindly
	      delete the last 4	bytes.	Hence, you should only use this	if you
	      know know	that your OS provides the FCS when reading raw pack-
	      ets.

       --ttl=string
	      Modify the IPv4/v6 TTL/Hop Limit.

	      Allows you to modify the TTL/Hop Limit of	all the	IPv4/v6	pack-
	      ets.  Specify a number to	hard-code the value or +/-value	to in-
	      crease or	decrease by the	value provided (limited	to 1-255).

	      Examples:
		  --ttl=10
		  --ttl=+7
		  --ttl=-64

       --tos=number
	      Set the IPv4 TOS/DiffServ/ECN byte.  This	option may appear up
	      to 1 times.  This	option takes an	integer	number as its argu-
	      ment.  The value of number is constrained	to being:
		  in the range	0 through 255

	      Allows you to override the TOS (also known as DiffServ/ECN)
	      value in IPv4.

       --tclass=number
	      Set the IPv6 Traffic Class byte.	This option may	appear up to 1
	      times.  This option takes	an integer number as its argument.
	      The value	of number is constrained to being:
		  in the range	0 through 255

	      Allows you to override the IPv6 Traffic Class field.

       --flowlabel=number
	      Set the IPv6 Flow	Label.	This option may	appear up to 1 times.
	      This option takes	an integer number as its argument.  The	value
	      of number	is constrained to being:
		  in the range	0 through 1048575

	      Allows you to override the 20bit IPv6 Flow Label field.  Has no
	      effect on	IPv4 packets.

       -F string, --fixlen=string
	      Pad or truncate packet data to match header length.  This	option
	      may appear up to 1 times.

	      Packets may be truncated during capture if the snaplen is
	      smaller then the packet.	This option allows you to modify the
	      packet to	pad the	packet back out	to the size stored in the
	      IPv4/v6 header or	rewrite	the IP header total length to reflect
	      the stored packet	length.

	      pad Truncated packets will be padded out so that the packet
	      length matches the IPv4 total length

	      trunc Truncated packets will have	their IPv4 total length	field
	      rewritten	to match the actual packet length

	      del Delete the packet

       --fuzz-seed=number
	      Fuzz 1 in	X packets. Edit	bytes, length, or emulate packet drop.
	      This option takes	an integer number as its argument.  The	value
	      of number	is constrained to being:
		  greater than or equal	to 0
	      The default number for this option is:
		   0

	      This fuzzing was designed	as to test layer 7 protocols such as
	      voip protocols.  It modifies randomly 1 out of X packets (where
	      X	= --fuzz-factor) in order for stateful protocols to cover more
	      of their code.  The random fuzzing actions focus on data start
	      and end because it often is the part of the data application
	      protocols	base their decisions on.

	      Possible fuzzing actions list:
	       * drop packet
	       * reduce	packet size
	       * edit packet Bytes:
		 * Not all Bytes have the same probability of appearance in
	      real life.
		   Replace with	0x00, 0xFF, or a random	byte with equal	like-
	      lihood.
		 * Not all Bytes have the same significance in a packet.
		   Replace the start, the end, or the middle of	the packet
	      with equal likelihood.
	       * do nothing (7 out of 8	packets)

       --fuzz-factor=number
	      Set the Fuzz 1 in	X packet ratio (default	1 in 8 packets).  This
	      option must appear in combination	with the following options:
	      fuzz-seed.  This option takes an integer number as its argument.
	      The value	of number is constrained to being:
		  greater than or equal	to 1
	      The default number for this option is:
		   8

	      Sets the ratio of	for --fuzz-seed	option.	By default this	value
	      is 8, which means	1 in 8 packets are modified by fuzzing.	Note
	      that this	ratio is based on the random number generated by the
	      supplied fuzz seed. Therefore by default you cannot expect that
	      exactly every eighth packet will be modified.

       --skipl2broadcast
	      Skip rewriting broadcast/multicast Layer 2 addresses.

	      By default, editing Layer	2 addresses will rewrite broadcast and
	      multicast	MAC addresses.	 Setting this flag will	keep broad-
	      cast/multicast MAC addresses from	being rewritten.

       --dlt=string
	      Override output DLT encapsulation.  This option may appear up to
	      1	times.

	      By default, no DLT (data link type) conversion will be made.  To
	      change the DLT type of the output	pcap, select one of the	fol-
	      lowing values:

	      enet Ethernet aka	DLT_EN10MB

	      hdlc Cisco HDLC aka DLT_C_HDLC

	      jnpr_ether Juniper Ethernet DLT_C_JNPR_ETHER

	      pppserial	PPP Serial aka DLT_PPP_SERIAL

	      user User	specified Layer	2 header and DLT type

       --enet-dmac=string
	      Override destination ethernet MAC	addresses.  This option	may
	      appear up	to 1 times.

	      Takes a pair of comma deliminated	ethernet MAC addresses which
	      will replace the destination MAC address of outbound packets.
	      The first	MAC address will be used for the server	to client
	      traffic and the optional second MAC address will be used for the
	      client to	server traffic.

	      Example:
		  --enet-dmac=00:12:13:14:15:16,00:22:33:44:55:66

       --enet-smac=string
	      Override source ethernet MAC addresses.  This option may appear
	      up to 1 times.

	      Takes a pair of comma deliminated	ethernet MAC addresses which
	      will replace the source MAC address of outbound packets.	The
	      first MAC	address	will be	used for the server to client traffic
	      and the optional second MAC address will be used for the client
	      to server	traffic.

	      Example:
		  --enet-smac=00:12:13:14:15:16,00:22:33:44:55:66

       --enet-subsmac=string
	      Substitute MAC addresses.	 This option may appear	up to 9999
	      times.

	      Allows you to rewrite ethernet MAC addresses of packets. It
	      takes comma delimited pair or MACs address and rewrites all oc-
	      currences	of the first MAC with the value	of the second MAC.
	      Example:
		  --enet-subsmac=00:12:13:14:15:16,00:22:33:44:55:66

       --enet-mac-seed=number
	      Randomize	MAC addresses.	This option may	appear up to 1 times.
	      This option must not appear in combination with any of the fol-
	      lowing options: enet-smac, enet-dmac, enet-subsmac.  This	option
	      takes an integer number as its argument.

	      Allows you to randomize ethernet MAC addresses of	packets,
	      mostly like what --seed option does for IPv4/IPv6	addresses.

       --enet-mac-seed-keep-bytes=number
	      Randomize	MAC addresses.	This option may	appear up to 1 times.
	      This option must appear in combination with the following	op-
	      tions: enet-mac-seed.  This option takes an integer number as
	      its argument.  The value of number is constrained	to being:
		  in the range	1 through 6

	      Keep some	bytes untouched	when usinging --enet-mac-seed option.

       --enet-vlan=string
	      Specify ethernet 802.1q VLAN tag mode.  This option may appear
	      up to 1 times.

	      Allows you to rewrite ethernet frames to add a 802.1q header to
	      standard 802.3 ethernet headers or remove	the 802.1q VLAN	tag
	      information.

	      add Rewrites the existing	802.3 ethernet header as an 802.1q
	      VLAN header

	      del Rewrites the existing	802.1q VLAN header as an 802.3 ether-
	      net header

       --enet-vlan-tag=number
	      Specify the new ethernet 802.1q VLAN tag value.  This option may
	      appear up	to 1 times.  This option must appear in	combination
	      with the following options: enet-vlan.  This option takes	an in-
	      teger number as its argument.  The value of number is con-
	      strained to being:
		  in the range	0 through 4095

       --enet-vlan-cfi=number
	      Specify the ethernet 802.1q VLAN CFI value.  This	option may ap-
	      pear up to 1 times.  This	option must appear in combination with
	      the following options: enet-vlan.	 This option takes an integer
	      number as	its argument.  The value of number is constrained to
	      being:
		  in the range	0 through 1

       --enet-vlan-pri=number
	      Specify the ethernet 802.1q VLAN priority.  This option may ap-
	      pear up to 1 times.  This	option must appear in combination with
	      the following options: enet-vlan.	 This option takes an integer
	      number as	its argument.  The value of number is constrained to
	      being:
		  in the range	0 through 7

       --hdlc-control=number
	      Specify HDLC control value.  This	option may appear up to	1
	      times.  This option takes	an integer number as its argument.

	      The Cisco	HDLC header has	a 1 byte "control" field.  Apparently
	      this should always be 0, but if you can use any 1	byte value.

       --hdlc-address=number
	      Specify HDLC address.  This option may appear up to 1 times.
	      This option takes	an integer number as its argument.

	      The Cisco	HDLC header has	a 1 byte "address" field which has two
	      valid values:

	      0x0F Unicast

	      0xBF Broadcast
	      You can however specify any single byte value.

       --user-dlt=number
	      Set output file DLT type.	 This option may appear	up to 1	times.
	      This option takes	an integer number as its argument.

	      Set the DLT value	of the output pcap file.

       --user-dlink=string
	      Rewrite Data-Link	layer with user	specified data.	 This option
	      may appear up to 2 times.

	      Provide a	series of comma	deliminated hex	values which will be
	      used to rewrite or create	the Layer 2 header of the packets.
	      The first	instance of this argument will rewrite both server and
	      client traffic, but if this argument is specified	a second time,
	      it will be used for the client traffic.

	      Example:
		  --user-dlink=01,02,03,04,05,06,00,1A,2B,3C,4D,5E,6F,08,00

       -d number, --dbug=number
	      Enable debugging output.	This option may	appear up to 1 times.
	      This option takes	an integer number as its argument.  The	value
	      of number	is constrained to being:
		  in the range	0 through 5
	      The default number for this option is:
		   0

	      If configured with --enable-debug, then you can specify a	ver-
	      bosity level for debugging output.  Higher numbers increase ver-
	      bosity.

       -q, --quiet
	      Quiet mode.

	      Print nothing except the statistics at the end of	the run

       -T string, --timer=string
	      Select packet timing mode: select, ioport, gtod, nano.  This op-
	      tion may appear up to 1 times.  The default string for this op-
	      tion is:
		   gtod

	      Allows you to select the packet timing method to use:

	      nano - Use nanosleep() API

	      select - Use select() API

	      ioport - Write to	the i386 IO Port 0x80

	      gtod [default] - Use a gettimeofday() loop

       --maxsleep=number
	      Sleep for	no more	then X milliseconds between packets.  This op-
	      tion takes an integer number as its argument.  The default num-
	      ber for this option is:
		   0

	      Set a limit for the maximum number of milliseconds that tcpre-
	      play will	sleep between packets.	Effectively prevents long de-
	      lays between packets without effecting the majority of packets.
	      Default is disabled.

       -v, --verbose
	      Print decoded packets via	tcpdump	to STDOUT.  This option	may
	      appear up	to 1 times.

       -A string, --decode=string
	      Arguments	passed to tcpdump decoder.  This option	may appear up
	      to 1 times.  This	option must appear in combination with the
	      following	options: verbose.

	      When enabling verbose mode (-v) you may also specify one or more
	      additional  arguments to pass to tcpdump to modify the way pack-
	      ets are decoded.	By default, -n and -l are used.	  Be  sure  to
	      quote the	arguments like:	-A "-axxx" so that they	are not	inter-
	      preted by	tcpreplay.   Please see	the tcpdump(1) man page	for a
	      complete list of options.

       -K, --preload-pcap
	      Preloads packets into RAM	before sending.

	      This option loads	the specified pcap(s) into RAM before starting
	      to send in order to improve replay performance while introducing
	      a	startup	performance hit.  Preloading can be used with or with-
	      out --loop. This option also suppresses flow statistics collec-
	      tion for every iteration,	which can significantly	reduce memory
	      usage. Flow statistics are predicted based on options supplied
	      and statistics collected from the	first loop iteration.

       -c string, --cachefile=string
	      Split traffic via	a tcpprep cache	file.  This option may appear
	      up to 1 times.  This option must appear in combination with the
	      following	options: intf2.	 This option must not appear in	combi-
	      nation with any of the following options:	dualfile.

	      If you have a pcap file you would	like to	use to send bi-direc-
	      tional traffic through a device (firewall, router, IDS, etc)
	      then using tcpprep you can create	a cachefile which tcpreplay
	      will use to split	the traffic across two network interfaces.

       -2, --dualfile
	      Replay two files at a time from a	network	tap.  This option may
	      appear up	to 1 times.  This option must appear in	combination
	      with the following options: intf2.  This option must not appear
	      in combination with any of the following options:	cachefile.

	      If you captured network traffic using a network tap, then	you
	      can end up with two pcap files- one for each direction.  This
	      option will replay these two files at the	same time, one on each
	      interface	and inter-mix them using the timestamps	in each.

       -i string, --intf1=string
	      Client to	server/RX/primary traffic output interface.  This op-
	      tion may appear up to 1 times.

	      Required network interface used to send either all traffic or
	      traffic which is marked as 'primary' via tcpprep.	 Primary traf-
	      fic is usually client-to-server or inbound (RX) on khial virtual
	      interfaces.

       -I string, --intf2=string
	      Server to	client/TX/secondary traffic output interface.  This
	      option may appear	up to 1	times.

	      Optional network interface used to send traffic which is marked
	      as 'secondary' via tcpprep.  Secondary traffic is	usually
	      server-to-client or outbound (TX)	on khial virtual interfaces.
	      Generally, it only makes sense to	use this option	with
	      --cachefile.

       --listnics
	      List available network interfaces	and exit.

       -l number, --loop=number
	      Loop through the capture file X times.  This option may appear
	      up to 1 times.  This option takes	an integer number as its argu-
	      ment.  The value of number is constrained	to being:
		  greater than or equal	to 0
	      The default number for this option is:
		   1

       --loopdelay-ms=number
	      Delay between loops in milliseconds.  This option	must appear in
	      combination with the following options: loop.  This option takes
	      an integer number	as its argument.  The value of number is con-
	      strained to being:
		  greater than or equal	to 0
	      The default number for this option is:
		   0

       --pktlen
	      Override the snaplen and use the actual packet len.  This	option
	      may appear up to 1 times.

	      By default, tcpreplay will send packets based on the size	of the
	      "snaplen"	stored in the pcap file	which is usually the correct
	      thing to do.  However, occasionally, tools will store more bytes
	      then told	to.  By	specifying this	option,	tcpreplay will ignore
	      the snaplen field	and instead try	to send	packets	based on the
	      original packet length.  Bad things may happen if	you specify
	      this option.

       -L number, --limit=number
	      Limit the	number of packets to send.  This option	may appear up
	      to 1 times.  This	option takes an	integer	number as its argu-
	      ment.  The value of number is constrained	to being:
		  greater than or equal	to 1
	      The default number for this option is:
		   -1

	      By default, tcpreplay will send all the packets.	Alternatively,
	      you can specify a	maximum	number of packets to send.

       --duration=number
	      Limit the	number of seconds to send.  This option	may appear up
	      to 1 times.  This	option takes an	integer	number as its argu-
	      ment.  The value of number is constrained	to being:
		  greater than or equal	to 1
	      The default number for this option is:
		   -1

	      By default, tcpreplay will send all the packets.	Alternatively,
	      you can specify a	maximum	number of seconds to transmit.

       -x string, --multiplier=string
	      Modify replay speed to a given multiple.	This option may	appear
	      up to 1 times.  This option must not appear in combination with
	      any of the following options: pps, mbps, oneatatime, topspeed.

	      Specify a	value to modify	the packet replay speed.  Examples:
		      2.0 will replay traffic at twice the speed captured
		      0.7 will replay traffic at 70% the speed captured

       -p string, --pps=string
	      Replay packets at	a given	packets/sec.  This option may appear
	      up to 1 times.  This option must not appear in combination with
	      any of the following options: multiplier,	mbps, oneatatime, top-
	      speed.

	      Specify a	value to regulate the packet replay to a specific
	      packet-per-second	rate.  Examples:
		      200 will replay traffic at 200 packets per second
		      0.25 will	replay traffic at 15 packets per minute

       -M string, --mbps=string
	      Replay packets at	a given	Mbps.  This option may appear up to 1
	      times.  This option must not appear in combination with any of
	      the following options: multiplier, pps, oneatatime, topspeed.

	      Specify a	floating point value for the Mbps rate that tcpreplay
	      should send packets at.

       -t, --topspeed
	      Replay packets as	fast as	possible.  This	option must not	appear
	      in combination with any of the following options:	mbps, multi-
	      plier, pps, oneatatime.

       -o, --oneatatime
	      Replay one packet	at a time for each user	input.	This option
	      must not appear in combination with any of the following op-
	      tions: mbps, pps,	multiplier, topspeed.

	      Allows you to step through one or	more packets at	a time.

       --pps-multi=number
	      Number of	packets	to send	for each time interval.	 This option
	      must appear in combination with the following options: pps.
	      This option takes	an integer number as its argument.  The	value
	      of number	is constrained to being:
		  greater than or equal	to 1
	      The default number for this option is:
		   1

	      When trying to send packets at very high rates, the time between
	      each packet can be so short that it is impossible	to accurately
	      sleep for	the required period of time.  This option allows you
	      to send multiple packets at a time, thus allowing	for longer
	      sleep times which	can be more accurately implemented.

       --unique-ip
	      Modify IP	addresses each loop iteration to generate unique
	      flows.  This option must appear in combination with the follow-
	      ing options: loop.  This option must not appear in combination
	      with any of the following	options: seed, fuzz-seed.

	      Ensure IPv4 and IPv6 packets will	be unique for each --loop it-
	      eration.	This is	done in	a way that will	not alter packet CRC,
	      and therefore will genrally not affect performance. This option
	      will significantly increase the flows/sec	over generated over
	      multiple loop iterations.

       --unique-ip-loops=string
	      Number of	times to loop before assigning new unique ip.  This
	      option may appear	up to 1	times.	This option must appear	in
	      combination with the following options: unique-ip.

	      Number of	--loop iterations before a new unique IP is assigned.
	      Default is 1. Assumes both --loop	and --unique-ip.

       --netmap
	      Write packets directly to	netmap enabled network adapter.

	      This feature will	detect netmap capable network drivers on Linux
	      and BSD systems. If detected, the	network	driver is bypassed for
	      the execution duration, and network buffers will be written to
	      directly.	This will allow	you to achieve full line rates on com-
	      modity network adapters, similar to rates	achieved by commercial
	      network traffic generators. Note that bypassing the network
	      driver will disrupt other	applications connected through the
	      test interface. See INSTALL for more information.

	      This feature can also be enabled by specifying an	interface as
	      'netmap:<intf>' or 'vale:<intf>. For example 'netmap:eth0' spec-
	      ifies netmap over	interface eth0.

       --nm-delay=number
	      Netmap startup delay.  This option takes an integer number as
	      its argument.  The default number	for this option	is:
		   10

	      Number of	seconds	to delay after netmap is loaded. Required to
	      ensure interfaces	are fully up before netmap transmit. Requires
	      netmap option. Default is	10 seconds.

       --no-flow-stats
	      Suppress printing	and tracking flow count, rates and expira-
	      tions.

	      Suppress the collection and printing of flow statistics. This
	      option may improve performance when not using --preload-pcap op-
	      tion, otherwise its only function	is to suppress printing.

	      The flow feature will track and print statistics of the flows
	      being sent.  A flow is loosely defined as	a unique combination
	      of a 5-tuple, i.e.  source IP, destination IP, source port, des-
	      tination port and	protocol.

	      If --loop	is specified, the flows	from one iteration to the next
	      will not be unique, unless the packets are altered. Use
	      --unique-ip or tcpreplay-edit to alter packets between itera-
	      tions.

       --flow-expiry=number
	      Number of	inactive seconds before	a flow is considered expired.
	      This option must not appear in combination with any of the fol-
	      lowing options: no-flow-stats.  This option takes	an integer
	      number as	its argument.  The value of number is constrained to
	      being:
		  greater than or equal	to 0
	      The default number for this option is:
		   0

	      This option will track and report	flow expirations based on the
	      flow idle	times. The timestamps within the pcap file are used to
	      determine	the expiry, not	the actual timestamp of	the packets
	      are replayed. For	example, a value of 30 suggests	that if	no
	      traffic is seen on a flow	for 30 seconds,	any subsequent traffic
	      would be considered a new	flow, and thereby will increment the
	      flows and	flows per second (fps) statistics.

	      This option can be used to optimize flow timeout settings	for
	      flow products.  Setting the timeout low may lead to flows	being
	      dropped when in fact the flow is simply slow to respond. Config-
	      uring your flow timeouts too high	may increase resources re-
	      quired by	your flow product.

	      Note that	using this option while	replaying at higher than orig-
	      inal speeds can lead to inflated flows and fps counts.

	      Default is 0 (no expiry) and a typical value is 30-120 seconds.

       -P, --pid
	      Print the	PID of tcpreplay at startup.

       --stats=number
	      Print statistics every X seconds,	or every loop if '0'.  This
	      option takes an integer number as	its argument.  The value of
	      number is	constrained to being:
		  greater than or equal	to 0

	      Note that	timed delays are a "best effort" and long delays be-
	      tween sending packets may	cause equally long delays between
	      printing statistics.

       -V, --version
	      Print version information.

       -h, --less-help
	      Display less usage information and exit.

       -H, --help
	      Display usage information	and exit.

       -!, --more-help
	      Pass the extended	usage information through a pager.

       --save-opts [=cfgfile]
	      Save the option state to cfgfile.	 The default is	the last con-
	      figuration file listed in	the OPTION PRESETS section, below.
	      The command will exit after updating the config file.

       --load-opts=cfgfile, --no-load-opts
	      Load options from	cfgfile.  The no-load-opts form	will disable
	      the loading of earlier config/rc/ini files.  --no-load-opts is
	      handled early, out of order.

OPTION PRESETS
       Any option that is not marked as	not presettable	may be preset by load-
       ing values from configuration ("RC" or ".INI") file(s).	The homerc
       file is "$$/", unless that is a directory.  In that case, the file
       ".tcpreplay-editrc" is searched for within that directory.

FILES
       See OPTION PRESETS for configuration files.

EXIT STATUS
       One of the following exit values	will be	returned:

       0  (EXIT_SUCCESS)
	      Successful program execution.

       1  (EXIT_FAILURE)
	      The operation failed or the command syntax was not valid.

       66  (EX_NOINPUT)
	      A	specified configuration	file could not be loaded.

       70  (EX_SOFTWARE)
	      libopts had an internal operational error.  Please report	it to
	      autogen-users@lists.sourceforge.net.  Thank you.

AUTHORS
       Copyright 2013-2018 Fred	Klassen	- AppNeta Copyright 2000-2012 Aaron
       Turner For support please use the tcpreplay-users@lists.sourceforge.net
       mailing list.  The latest version of this software is always available
       from: http://tcpreplay.appneta.com/

COPYRIGHT
       Copyright (C) 2000-2018 Aaron Turner and	Fred Klassen all rights	re-
       served.	This program is	released under the terms of the	GNU General
       Public License, version 3 or later.

BUGS
       Please send bug reports to: tcpreplay-users@lists.sourceforge.net

NOTES
       This manual page	was AutoGen-erated from	the tcpreplay-edit option def-
       initions.

tcpreplay			  01 Mar 2021		     tcpreplay-edit(1)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | OPTION PRESETS | FILES | EXIT STATUS | AUTHORS | COPYRIGHT | BUGS | NOTES

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