Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

Bandwidth Upgrade ?


1.I need to upgrade the site bandwidth

from 256kb to 1533kb

what are the steps to do it ?

2. Also will this change cause any

outage on production network ?

3. the project read like this This

project is to increase the bandwidth

at US-ABC from 256Kb to 1533Kb.

This will be a software change

since the Access Bandwidth is already

1536Kb and the port speed is set to


I have attached a network diagram

Please Help

Thank You



Re: Bandwidth Upgrade ?

When uprgrading circuits i tend to order a new circuit, burn it in on replacement / spare equipment, then do a hot cut. Downtime can be eliminated with careful planning.

Is your CSU/DSU onboard or a seperate device?

New Member

Re: Bandwidth Upgrade ?


I am not sure its onboard or seperate how do i fing it I m not at the site also in the network diagram it is shown as a seperate device

so what are the sequence of the steps I need to do I guess the service provider have done from their side

is it not simple as I go in the serial interface and type Bandwidth 1533 done !!


Hall of Fame Super Bronze

Re: Bandwidth Upgrade ?

Based on the attached document, the CSU/DSU is already clocked at 1.5Mbps and it seems you are doing software traffic shaping on the 2600 router to limit the speed down to 256kbps.

Again, this is based on the attached document. If the CSU/DSU is clocked at 256kbps, you manually need to change the clock allocation on the device at the same time the provider changes their clock allocation so they can be on sync.

You need to find out more information as to what procedure must take place.

As for changing the bandwidth command under the interface, this step won't change the bandwidth speed. You need to check if Frame Relay Traffic Shaping is implemented on the 2600.

If you post configs, we can help you further.