QoS Guidance

Unanswered Question
Apr 16th, 2008

I have not done much QoS, other than rate limiting.

I am looking for a solution to help with a nationwide project.

We have over 100 locations, all have 2811, running DMVPN, running VoIP, running in SRST Mode with all phones registering to CUCM 6.1

We have an application that will be a public resource that will need priority traffic, as well as VoIP calls.

What are some of the best options for QoS?

I could do rate limiting but I want all available bandwidth and not force that type of traffic to only get a specified amount of bandwidth.

does that make sense?

I have this problem too.
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cisco_lad2004 Wed, 04/16/2008 - 10:12

U can use CBWFQ

1-You have to identify your traffic classes, and decide how many you want to have.

2-you decide on how much BW needs to be allocated to each class.

3-make sure VoIP uses LLQ.

You can typically allocate to all your classes 75% of total BW.

with CBWFQ Bandwith command, if a class is not using its allocated ammount fully, it can be shared with the other classes.

For example, u might have:

Data class 40%

VoIP class 15%

Internet Class 30%

if data is only using 20% the rest will then be allocated to Internet.



Rick Morris Wed, 04/16/2008 - 10:16

right now we just entered in Auto QoS.

When we look at the settings, config suggestions, it appears to be the same as discussed above.

Is this true, does AutoQoS do the same as the CBWFQ?

a.cruea1980 Wed, 04/16/2008 - 11:50

AutoQoS should really just be used as a template and suggestions as to how to set things up.

But as the old saying goes, if it ain't broke, don't fix it, right? :)


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