Installing:
trickle          x86_64         1.07-19.el6            epel           42 k
# trickle -help
Usage: trickle [-hvVs] [-d <rate>] [-u <rate>] [-w <length>] [-t <seconds>]
               [-l <length>] [-n <path>] command ...
	-h           Help (this)
	-v           Increase verbosity level
	-V           Print trickle version
	-s           Run trickle in standalone mode independent of trickled
	-d <rate>    Set maximum cumulative download rate to <rate> KB/s
	-u <rate>    Set maximum cumulative upload rate to <rate> KB/s
	-w <length>  Set window length to <length> KB 
	-t <seconds> Set default smoothing time to <seconds> s
	-l <length>  Set default smoothing length to <length> KB
	-n <path>    Use trickled socket name <path>
	-L <ms>      Set latency to <ms> milliseconds
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# yum install wondershaper
wondershaper             noarch            1.2.1-2.el6                epel               17 k
# wondershaper
Wonder Shaper 1.2.1
Usage: /usr/sbin/wondershaper [device] clean|[upload speed in Kb/s] [download speed in Kb/s]
Example: /usr/sbin/wondershaper eth0 20 500
# wondershaper eth0 5000 500
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# scp test.img root@192.168.200.213:/root
test.img	100%  293MB  10.5MB/s   00:28
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# scp test.img root@192.168.200.213:/root
test.img	100%  293MB   1.1MB/s   04:38
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# wondershaper  clear eth0
Wondershaper queues have been cleared.