Cisco 2811 – Divide Bandwidth

20 pts.
Tags:
Bandwidth
Cisco 2811
Cisco router configuration
Cisco Routers
Leased line
Network design
Router configuration
Routers
We have Cisco 2811 router with on serial interface and two fast ethernets. We planned to take 1 mbps leased line and we have to divide it into two parts. For one network is should be 300 kbps and the rest bandwidth for another network. Can any help in this.

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There are a few different ways this can be done but using MQC is going to be the most flexible.

Here is one way it can be done…

Basically you can create a class-map for each group of traffic you are trying to classify.

<b>access-list 101 permit ip x.x.x.x y.y.y.y <customer A’s ip address /inverse mask
access-list 102 permit ip x.x.x.x y.y.y.y <customer B’s ip address /inverse mask

class-map match-any customera
match access-group 101

class-map match-any customerb
match access-group 102

Then you will create your outbound policy for the external interface

policy-map myoutboundpolicy
class customera
bandwidth (desired bw in kbps)
class customerb
bandwidth (desired bw in kbps)

interface (outbound interface)
service-policy output myoutboundpolicy</b>

This configuration will allow each map to us above it’s allocated bandwidth if it’s available. In times of congestion, the traffic allocated as you defined.

If you want to only strictly allow the 300kbps or whatever number you decide, you can use the police option under each class in thepolicy map

<b>police (bw in bps) conform-action transmit exceed-action drop</b>

And finally you will have to determine how you want to limit inbound traffic.

An easy way to do this is to create a new service policy for each inside or customer facing interface and then police the outbound traffic there to your desired bandwidth.

There are numerous other ways to get to the same end goal but this seems to be a very easy and quick way to do what you’re trying to do.

Good luck

_____________________________________________________________________________________

set your bandwidth on the interfaces to teh speed you wish them to allow. it’s fairly simple.

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  • Jfernatt
    cragsdale I didn't meant to dump all over your answer. I had to walk away from the keyboard and just continued typing when i got back not knowing you had posted an answer or I would have put mine into discussion.
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  • Jfernatt
    Setting the bandwidth on the interface will NOT share bandwidth on the interface. It is used by routing protocols to determine the best path to a network not how to actually load share on the interface. set your bandwidth on the interfaces to teh speed you wish them to allow. it's fairly simple. is incorrect.
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