how can I limit internet bandwidth for some ip clients?

[Samiullah Osman]

I have a C3900 cisco router and I want to limit internet bandwidth for some users using there ip address. How can I do this?

I appreciate any replay. 

[Thomas Schmitt]

You can create an ACL matching IP addresses, then apply that ACL to new class and then create a service policy to shape traffic from that class

[anboom · Accepted solution]

as @Thomas Schmitt mentioned, you could use an ACL to shape traffic for traffic. I added an example you can use below.

There are different ways to do this, and if you want to test in a lab, check out this link on QoS on Cisco IOS:

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/qos_regpkt/configuration/15-mt/qos-regpkt-15-mt-book/qos-regpkt-gts.html

Configuring Generic Traffic Shaping Using an Access Control List

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    access-list access-list-number {deny | permit} source [source-wildcard]

4.    interface type number

5.    traffic-shape group access-list bit-rate [burst-size [excess-burst-size]]

6.    end

7.    show traffic-shape [interface-type interface-number]

8.    show traffic-shape statistics [interface-type interface-number]

9.    exit

DETAILED STEPS

	Command or Action	Purpose
Step 1	enable Example: Router> enable	Enables privileged EXEC mode. Enter your password if prompted.
Step 2	configure terminal Example: Router# configure terminal	Enters global configuration mode.
Step 3	access-list access-list-number {deny | permit} source [source-wildcard] Example: Router(config)# access-list 1 permit 192.5.34.0 0.0.0.255	Shapes traffic according to specified access list. Enter the access list number, one of the required keywords, and the source information.
Step 4	interface type number Example: Router(config)# interface s4/0	Configures an interface (or subinterface) type and enters interface configuration mode. Enter the interface type number.
Step 5	traffic-shape group access-list bit-rate [burst-size [excess-burst-size]] Example: Router(config-if)# traffic-shape group 101 128000	Enables traffic shaping based on a specific access list for outbound traffic on an interface. Enter the access list number and the bit rate.
Step 6	end Example: Router(config-if)# end	Returns to privileged EXEC mode.
Step 7	show traffic-shape [interface-type interface-number] Example: Router# show traffic-shape serial4/0	(Optional) Displays the current traffic-shaping configuration.
Step 8	show traffic-shape statistics [interface-type interface-number] Example: Router# show traffic-shape statistics serial4/0	(Optional) Displays the current traffic-shaping statistics.
Step 9	exit Example: Router# exit	(Optional) Exits privileged EXEC mode.

What to Do Next

Note	Repeat the above procedure for each additional type of traffic you want to shape.

[Joseph W. Doherty]

BTW, do take note this is for IOS Release 15M&T.

I recall (?) on some later ISRs finding GTS no longer provided on interfaces.  Needed to use CBWFQ's traffic shaping.  Which interestingly, in the referenced document has the note:

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GTS is similar to Class-Based Traffic Shaping. Although Class-Based Traffic Shaping is the Cisco-recommended mechanism, GTS is still supported.

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