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mathieuploton
Beginner

Traffic shaping for bandwidth management

Hello,

I am trying to get ride of an old traffic management appliance and would like to replace it by a simple Cisco 3845.

The configuration is really simple:

Customers -- Router 3845 -- Internet

I want to be able to provide bundles to customer such 64kps garanteed/ 2mbps MIR (retail) and 2mbps garanteed no MIR (business).

I need also to specify to the router the total internet bandwitdh available (example: 20mbps symetrical).

Could you let me know if this configuration will work ? Should I worry about any performance issue if I start to have a lot of customers ?

ip access-list extended Cust1

permit ip any sub_Cust1

permit ip subCust1 any

ip access-list extended Cust2

permit ip any sub_Cust2

permit ip subCust2 any

class-map match-all Cust1

match access-group name Cust1

class-map match-all Cust2

match access-group name Cust2

policy-map parent

  class class-default

  bandwidth 20000 //total bandwidth available : 20mbps

   service-policy customers

policy-map customers

class Cust1

  shape peak 64000 6400 198400 !Retail customer CIR 64kbps MIR 2048kbps

  class Cust2

  shape average 2048000 !Business customer 2mbps dedicated

int gi0/0

   service-policy output parent

int gi0/1

service-policy output parent

2 REPLIES 2
ashok_boin
Contributor

Hi,

Your configuration looks good to me and it will meet your objective.

shape peak 64000 6400 198400 --> This enables this type of customers to burst to 2Mbps in only during non-congestion periods. But, I am not sure whether it's recommended to have CIR as 64Kbps and MIR as 2Mbps as there will be drops and delays while turning from non-congestion to congestion periods before settling down to their contracted rates.

http://www.cisco.com/en/US/docs/ios/12_2t/qos/command/reference/qftcmd9.html#wp1077189

Regards...

-Ashok.


With best regards...
Ashok

Hello ashok_boin,

Thank you for your answer,

Actually I dont want to commit on a bigger CIR because it is a retail connection. Should I turn the CIR to 0 and only work in best effort?

I would like to imitate the same behaviour of a home user dsl connection.

Best regards,