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Beginner

Traffic Shaping on Internet circuits

Hi,

 

I have a 100M Internet circuit connecting to a Cisco ISR4331 router. We are planning to upgrade the circuit to 400M, and have multiple businesses use this circuit.

Can I implement traffic shaping to limit certain businesses to use only 300M of bandwdith, and have the remaining 100M for the other businesses. If yes, how do I differentiate the source traffic between these businesses while implementing traffic shaping?


Thanks
Mikey

4 REPLIES 4
Hall of Fame Expert

Re: Traffic Shaping on Internet circuits

Hello Mikey,

if the business units can be classified based on IP address subnet you can use access lists to create class-maps and then you can use hierarchical QoS with a parent shaper and child policies.

 

If this is not possible you need to use NBAR (match protocol) and classify traffic at application layer.

 

Hope to help

Giuseppe

 

Beginner

Re: Traffic Shaping on Internet circuits

Hi Giuseppe, 

 

Thanks for your reply. Yes, the business units are classified into different subnets.

 

Could you please help me with any configuration examples, or guide me to any webpage for reference.

 

 

Thanks

Mikey

VIP Expert

Re: Traffic Shaping on Internet circuits

BTW, shaping can only be used for egress, so if you're looking to limit Internet ingress traffic to 300 Mbps, you would need to either shape traffic on LAN egress or police WAN ingress. Also, either won't be very precise on limiting ingress traffic before the shaper or policer because the Internet traffic can burst above the limit before it reaches the shaper or policer. If you only want to limit bandwidth going to the Internet (again not from it), either a shaper or policer will be very effective.

Also BTW, you realize an ISR 4331, to support 400 Mbps, especially duplex, will need a boost license, and even then, it might not be able to constantly guarantee above 300 Mbps aggregate performance?
Hall of Fame Expert

Re: Traffic Shaping on Internet circuits

Hello Joseph,

very good point about possible performance issues with increased aggregated traffic.

 

>> Also BTW, you realize an ISR 4331, to support 400 Mbps, especially duplex, will need a boost license, and even then, it might not be able to constantly guarantee above 300 Mbps aggregate performance? 

 

Best Regards

Giuseppe

 

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