Bandwidth Utilization Avg or Max for capacity Planning best practice

Hello All - This is a conceptual or Non-Cisco product question. Hope you can help me to get this best industry practice
I am doing a Capacity planning for the WAN Link Bandwidth. To study the last month bandwidth utilization in the MRTG graph, i am seeing two values
Average
Maximum.
To measure how much bandwidth my remote location is using which value i have to use. Average or Max?
Average is always low eg. 20% to 30%
Maximum is continuous 100% for 3 hour in 3 different intervals in a day and become 60% in rest of the day
What is the best practice followed in the networking industry to derive the upgrade size of the bandwidth by using the Utilization graph
regards,
SAIRAM

Hello.
It makes no sense to use average during whole day (or a month), as you do the capacity management to avoid business impact due to link utilization; and average does not help you to catch is the end-users experience any performance issues.
Typically your capacity management algorithm/thresholds are dependent on traffic patterns. As theses are really different cases if you run SAP+VoIP vs. youtube+Outlook. If you have any business critical traffic, you need to deploy QoS (unless you are allowed to increase link bandwidth infinitely).
So, I would recommend to use 95-percentile of maximum values on 5-15 minutes interval (your algorithm/thresholds will be really sensitive to pooling interval, so choose it carefully). After to collect baseline (for a month or so) - go and ask users about their experience and try to correlate poor experience with traffic bursts. This would help you to define thresholds for link upgrade triggers.
PS: proactive capacity management includes link planning for new sites and their impact on existing links (in HQ and other spoke).
PS2: also I would recommend to separately track utilization during business hours (business traffic) and non-business (service or backup traffic).

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>
harvey wu wrote:
> HI all,
>
> Is there any table for capacity planning?
> we want to do some development to get capacity requirements data for each work center, don't like using CM01.
> Thanks!
>
> Harvey
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On 10/28/2013 7:16 AM, JonathanCox wrote:
>
> Hello,
>
> We are currently designing our NSM 3.1 for AD implementation and would
> like some guidance with regard to installing the NSM Event Agent. We
> have come up with two options:
>
>
> - The first option is to install the NSM Event Agent on a Domain
> Controller where new user accounts are provisioned.
> - The second option is to install the NSM Event Agent on a server with
> the other NSM components.
>
>
>
> The argument for option 1 is that NSM will be notified as soon as an
> account is created.
> The argument for option 2 is that MS best practice is that no other
> software should be installed on a DC and that the NSM Event Agent will
> perform a network request to talk to the nearest domain controller to
> obtain a list of changes since it last connected.
>
> Is there any preferred option, or does it not matter?
>
> Regards,
>
> Jonathan
>
>
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Message was edited by: Magus069

Bandwidth Utilization Avg or Max for capacity Planning best practice

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