Bandwidth limitation on switch and router

[ANGELO DE MASI]

Hi, I'm workin gon this scenario: a router 2821 works as internet router and it's connected to a 3750 switch. Every switch port is configured as routed port and it is linked to a different customer network. All customers share the same internet bandwitdth so I should need to limit accordingly internet bandwidth use. Can you please give me and advise to implement this configuration?

First of all, where it is more convenient to implement rate limit and in which direction? Do I need to use CAR or Traffic Policing? I already tried both but it seems nothing change. How can I verify and monitor if CAR or Policing are tightly working? More over on switch I can't apply output policy on intefaces.  

I will appreciate very much any kind suggestion. Thandk you in advance.

If you need more information about my scenario, please ask me.

Regards

angelo

[paolo bevilacqua]

You can use traffic-shaping for a fixed limit.

Or a percent that applies only when link is congested.

Both in PBR likely under an hierarchical shaping.

I recommend you don't anything on the switch.

In all cases, read QoS about QoS in cisco standard documentation.

[ANGELO DE MASI]

Hi Paolo,

first of all thanks for your answer.

You suggest dont' do anything on the switch, so do I need to apply QoS only on customer's router?

I applied a configuration like the following to limit customer's bandidth to 10Mb, is it correct?

Example:

class-map match-all Rate-Limit-Out

match access-group name ACL-Rate-Limit

class-map match-all CIR

match access-group name ACL-Rate-Limit

!

!

policy-map CCP-QoS-Policy-1

class CIR

   police cir 10000000 bc 2000000 be 4000000

     conform-action transmit

     exceed-action drop

policy-map CCP-QoS-Policy-2

class Rate-Limit-Out

   police cir 10000000 bc 2000000 be 4000000

     conform-action transmit

     exceed-action drop

!

interface FastEthernet0/0

description Interfaccia Outside verso Fibra

service-policy input CCP-QoS-Policy-1

service-policy output CCP-QoS-Policy-2

!

ip access-list standard ACL-Rate-Limit

remark CCP_ACL Category=256

permit any

Every other tips will be very appreciated.

Thanks a lot in advance

regards

angelo