tc-mirred(osx) [osx man page]

Mirror/redirect action in tc(8) 				       Linux					   Mirror/redirect action in tc(8)

NAME

       mirred - mirror/redirect action

SYNOPSIS

       tc ... action mirred DIRECTION ACTION [ index INDEX ] dev DEVICENAME

       DIRECTION := { ingress | egress }

       ACTION := { mirror | redirect }

DESCRIPTION

       The  mirred  action  allows  packet  mirroring  (copying)  or redirecting (stealing) the packet it receives. Mirroring is what is sometimes
       referred to as Switch Port Analyzer (SPAN) and is commonly used to analyze and/or debug flows.

OPTIONS

       ingress
       egress Specify the direction in which the packet shall appear on the destination interface.

       mirror
       redirect
	      Define whether the packet should be copied (mirror) or moved (redirect) to the destination interface.

       index INDEX
	      Assign a unique ID to this action instead of letting the kernel choose one automatically.  INDEX is a 32bit unsigned integer greater
	      than zero.

       dev DEVICENAME
	      Specify the network interface to redirect or mirror to.

EXAMPLES

       Limit ingress bandwidth on eth0 to 1mbit/s, redirect exceeding traffic to lo for debugging purposes:

	      # tc qdisc add dev eth0 handle ffff: ingress
	      # tc filter add dev eth0 parent ffff: u32 
		   match u32 0 0 
		   action police rate 1mbit burst 100k conform-exceed pipe 
		   action mirred egress redirect dev lo

       Mirror all incoming ICMP packets on eth0 to a dummy interface for examination with e.g. tcpdump:

	      # ip link add dummy0 type dummy
	      # ip link set dummy0 up
	      # tc qdisc add dev eth0 handle ffff: ingress
	      # tc filter add dev eth0 parent ffff: protocol ip 
		   u32 match ip protocol 1 0xff 
		   action mirred egress mirror dev dummy0

       Using an ifb interface, it is possible to send ingress traffic through an instance of sfq:

	      # modprobe ifb
	      # ip link set ifb0 up
	      # tc qdisc add dev ifb0 root sfq
	      # tc qdisc add dev eth0 handle ffff: ingress
	      # tc filter add dev eth0 parent ffff: u32 
		   match u32 0 0 
		   action mirred egress redirect dev ifb0

SEE ALSO

       tc(8), tc-u32(8)

iproute2							    11 Jan 2015 				   Mirror/redirect action in tc(8)

Check Out this Related Man Page

Match-all classifier in tc(8)					       Linux					     Match-all classifier in tc(8)

NAME

       matchall - traffic control filter that matches every packet

SYNOPSIS

       tc filter ... matchall [ skip_sw | skip_hw  ] [ action ACTION_SPEC ] [ classid CLASSID ]

DESCRIPTION

       The matchall filter allows to classify every packet that flows on the port and run a action on it.

OPTIONS

       action ACTION_SPEC
	      Apply an action from the generic actions framework on matching packets.

       classid CLASSID
	      Push matching packets into the class identified by CLASSID.

       skip_sw
	      Do  not  process filter by software. If hardware has no offload support for this filter, or TC offload is not enabled for the inter-
	      face, operation will fail.

       skip_hw
	      Do not process filter by hardware.

EXAMPLES

       To create ingress mirroring from port eth1 to port eth2:

	      tc qdisc	add dev eth1 handle ffff: ingress
	      tc filter add dev eth1 parent ffff:	    
		      matchall skip_sw			    
		      action mirred egress mirror	    
		      dev eth2

       The first command creats an ingress qdisc with handle ffff: on device eth1 where the second command attaches a matchall filters on it  that
       mirrors the packets to device eth2.

       To create egress mirroring from port eth1 to port eth2:

	      tc qdisc add dev eth1 handle 1: root prio
	      tc filter add dev eth1 parent 1:		     
		      matchall skip_sw			     
		      action mirred egress mirror	     
		      dev eth2

       The  first  command  creats  an egress qdisc with handle 1: that replaces the root qdisc on device eth1 where the second command attaches a
       matchall filters on it that mirrors the packets to device eth2.

       To sample one of every 100 packets flowing into interface eth0 to psample group 12:

	      tc qdisc add dev eth0 handle ffff: ingress
	      tc filter add dev eth0 parent ffff: matchall 
		   action sample rate 100 group 12

SEE ALSO

       tc(8),

iproute2							    21 Oct 2015 				     Match-all classifier in tc(8)

Linux and UNIX Man Pages

tc-mirred(osx) [osx man page]

Check Out this Related Man Page