#!/bin/bash

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DEVICE="eth0"

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if [ ! -z $2 ]; then

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DEVICE="$2"

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fi

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if [ "$1" == "--disable" ]; then

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tc qdisc delete dev $DEVICE root || echo "Unable to remove rules, did you specify the right device? Or were rules already removed?"

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logger IMHADMIN "Disabled bandwidtch shaping on $DEVICE"

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exit;

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fi

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if [ "$1" == "--enable" ]; then

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########################################Begin Shaping Code

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#Delete any qdiscs in place (reverts to standard pfifo)

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# tc qdisc delete dev $DEVICE root

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#Set Device and default 'marking' (language not correct)

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tc qdisc add dev $DEVICE root handle 1: htb default 90 || echo "Unable to use tc to do bandwidth shaping - did you specify the wrong device? Is it already enabled?"

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#Set 'Base' limits that will apply to all derivative clases

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tc class add dev $DEVICE parent 1: classid 1: htb rate 90mbit ceil 100mbit || echo "Unable to use tc to do bandwidth shaping - did you specify the wrong device? Is it already enabled?"

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#Set limits for default ":90"

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tc class add dev $DEVICE parent 1:1 classid 1:90 htb rate 85mbit ceil 88mbit || echo "Unable to use tc to do bandwidth shaping - did you specify the wrong device? Is is already enabled?"

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logger IMHADMIN "Enabled 100mbit bandwidtch shaping on $DEVICE"

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exit

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fi

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if [ "$1" == "--show" ]; then

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#show all rules

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tc -s -d qdisc show dev $DEVICE;tc -s -d class show dev $DEVICE;tc -s -d filter show dev $DEVICE || echo "Couldn't list bandwish shaping properties - You used $DEVICE, is that right?"

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exit;

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fi

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if [ "$1" == "--status" ]; then

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tc -s -d qdisc show dev $DEVICE | grep pfifo 1>/dev/null 2>/dev/null

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if [ "$?" -eq 0 ]; then

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echo "Bandwidth shaping NOT enabled on $DEVICE";

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exit 0;

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elif [ "$?" -eq 1 ]; then

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echo "Bandwidth shaping enabled on $DEVICE"

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exit 1;

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else

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echo "You shouldn't see this."

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exit;

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fi

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fi

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echo "This script enables/disabled traffic shaping

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Usage:

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$0 --enable - Enables bandwidth shaping on eth0

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$0 --disable - Disables bandwidth shaping on eth0

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$0 --status - Returns 1 if no shaping is enabled, 0 if enabled. (this

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is primarily for shell scripting/a nagios check if we need it)

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$0 --show - Displays the bandwidth shaping properties.

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If no shaping is in place a default setup will have default qdisc

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of pfifo and will will look similar to the following:

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qdisc pfifo_fast 0: bands 3 priomap 1 2 2 2 1 2 0 0 1 1 1 1 1 1 1 1

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Sent 383480 bytes 3266 pkt (dropped 0, overlimits 0 requeues 0)

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rate 0bit 0pps backlog 0b 0p requeues 0

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If bandwidth shaping is enabled, it will have the htb qdisk in place:

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qdisc htb 1: r2q 10 default 90 direct_packets_stat 0 ver 3.17

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Sent 6022 bytes 67 pkt (dropped 0, overlimits 0 requeues 0)

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rate 0bit 0pps backlog 0b 0p requeues 0

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class htb 1: root prio 0 quantum 200000 rate 90000Kbit ceil 100000Kbit

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burst 12847b/8 mpu 0b overhead 0b cburst 14100b/8 mpu 0b overhead 0b level 0

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Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)

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rate 0bit 0pps backlog 0b 0p requeues 0

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lended: 0 borrowed: 0 giants: 0

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tokens: 1142 ctokens: 1128

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class htb 1:90 root prio 0 quantum 200000 rate 85000Kbit ceil 88000Kbit

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burst 12218b/8 mpu 0b overhead 0b cburst 12595b/8 mpu 0b overhead 0b level 0

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Sent 6410 bytes 69 pkt (dropped 0, overlimits 0 requeues 0)

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rate 0bit 0pps backlog 0b 0p requeues 0

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lended: 69 borrowed: 0 giants: 0

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tokens: 1131 ctokens: 1127

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If you need to specify an alternate device (a few servers do not have their primary adapter as eth0),

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you can do the following:

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$0 --enable eth1

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$0 --disable eth1

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"

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exit

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