Bandwidth Command

[Joe Lee]

We installed the DS3 connection and the ISP provides only 20 MB bandwidth, and we run QoS modular. I was under impression that the command "bandwidth" is for QoS setup, and the command " dsu bandwidth" is layer1 setup.  I have questions about the difference " bandwidth" and " dsu bandwidth". Did I configure right? Please advise.

int s1/0

ip address 192.168.1.1 255.255.255.252

bandwidth 20000

encpsulation ppp

dsu bandwidth 44210

Thanks,

Joe

[vmiller]

Certain DSU's (external) have dip switches that

can be set for "actual" bandwith. You might try setting the dsu b/w to what you actually ordered

I'd also set the bandwidth to what was ordered, your qos will make more sense.

[kathpric]

The interface "bandwidth" command like you have configured does not apply to QoS.  It is for routing protocols like EIGRP, etc.  There is also a "bandwidth" command you use under a policy-map which is used for QoS.

QoS example using bandwidth:

policy-map foo

  class-map bar

    bandwidth percent 30

Additionally you would need to define the class-map and apply the policy to an interface.  This older document describes the use of the bandwidth command in QoS.

http://www.cisco.com/en/US/tech/tk543/tk757/technologies_tech_note09186a0080103eae.shtml

Kathy