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Ian Arakel
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QoS on Cisco router

Hi Team,

We have two locations connected via MPLS cloud of 20 MB.
We have observed two servers 192.168.1.1 and 192.168.1.2 from location A to be consuming huge bandwidth while communicating to a server 192.168.3.2 in location B.
We want to restrict the maximum bandwidth that can be utilized for the communication between the two talkers to 7 MB only.
We have an existing service policy called on the router as given below.

  Policy Map RESTRICT
    Class RTP
      priority 20 (%)
    Class Signaling
      bandwidth 6 (%)
    Class class-default
      fair-queue

Kindly confirm the steps in which the same could be achieved without disrupting the existing QoS?
CiscoNetworkingNetwork AnalysisNetworking ProtocolsNetwork Security

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Ian Arakel

8/22/2022 - Mon
David Johnson, CD

Do you actually have a problem or is it a perceived problem? Does QOS not throttle when other demand increases?
Dr. Klahn

David raises a good point.  Throttle them if there's no spare bandwidth, yes.  But if there is available bandwidth on the network, assuming that you're not paying per megabyte, why should these systems not have it even if they are bandwidth hogs?

imo, it would be prudent to first investigate the nature of the traffic between these systems.  Then get the support of management to help legitimize any action taken.  If somebody's watching Netflix on company time via an unapproved VPN then yes, stomp on them hard.  But throttling critical transactions could have undesirable consequences.  And it might just turn out there is something poorly configured or doing unnecessary updates across that particular link, and correcting it will solve the problem.
Ian Arakel

ASKER
Hi David/Klahn,

The traffic between the source and destination is a file transfer traffic.
QoS I believe comes into picture in cases of congestion.
The amount of transfers is huge over the WAN media and its the managements decision to ensure that only a certain max bandwidth be at any point of time i.e. even when there is no congestion file transfer should happen at max 'X' bandwidth and if it goes above that applied the necessary actions.

I was dong my own research where we found that class-maps could be created matching the source and destination after which we could police or shape the traffic.


What would you guys recommend and so send me a sample configuration to match the requirement?
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William Peck
Ian Arakel

ASKER
Hi there,

Any inputs
Ian Arakel

ASKER
Hi team,

Please help.
Ian Arakel

ASKER
This query has not been answered.
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Ian Arakel

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Ty