Qos question

Unanswered Question
Oct 28th, 2009
User Badges:

Dear all

I have some branch offices, they user voip and video conference and also some application.

the problem is video conference need bandwidth but it does not user very day?

how can I garantee bandwidth why its on demand and when the video conference is not in use the bandwidth allocate for other applications

thank you

  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
Loading.
huangedmc Wed, 10/28/2009 - 04:01
User Badges:

On the high level, you need to work w/ your MPLS carrier to make sure you have a suitable QoS policy in the provider cloud, and configure your QoS policy accordingly w/ various priority & bandwidth commands.


Read through the IOS 12.4 QoS config guide:

http://www.cisco.com/en/US/docs/ios/qos/configuration/guide/12_4/qos_12_4_book.html


The design guide should also help:

http://www.cisco.com/en/US/docs/solutions/Enterprise/WAN_and_MAN/QoS_SRND/QoS-SRND-Book.html



Joseph W. Doherty Wed, 10/28/2009 - 04:23
User Badges:
  • Super Bronze, 10000 points or more

Much QoS is based on the premise that a class or type of traffic is guaranteed a certain amount of bandwidth but often when any of that bandwidth isn't being used it can be used by other traffic.


For example a CBWFQ such as:


policy-map aSample


class VoIP

priority percent 10


class VidConf

priorty percent 20


would guarantee VoIP 10% of interface bandwidth, VidConf 20% of interface bandwidth and guarantee 70% for all other traffic but if VoIP was only actually using 5% and VidConf wasn't active, other traffic could use 95% of the interface's bandwidth. If VidConf became active and used 15% while VoIP was still using just 5%, then other traffic could use as much as 80%, and so on.

Actions

This Discussion