Traffic Shapping best practice

[stefan-ohg]

Helly everyone,

i have 3 Vlans (Server, Clients, Other).

The traffic prioritization should look like this:

Server - high

Clients - medium

Other - low

All of the 3 Vlans should use the full bandwidth of my Wan Interface (inbound and outbound), but if "Clients" or "Other" use the the full bandwidth and now a "Server" want to communicate over the Wan interface it should get the full bandwidth and Clients and Other only a minimum guaranteed bandwidth.

What is the best way to configure this scenario with traffic shapping?

Regards 

Stefan

[AEK]

Hello Stefan

So for a case like yours I'd first start by creating 3 profiles with just High, Medium and Low priorities, without setting other parameters (granted, max and so), and 3 rules according to the mentioned prioritization.

Besides, for WAN I'd never use reverse shaping, as it may have negative impact. I mean (as per my understanding) when you use reverse shaping you may drop retrieved data that is already retrieved from the WAN, so your client will request it again and it consumes your bandwidth further.

[Vedaant]

Hello Stefan, 

To achieve the traffic prioritization scenario you described with three VLANs (server, clients, other) using the full bandwidth of your WAN interface while ensuring the server gets full bandwidth priority when needed, you can follow these steps to configure traffic shaping:
 - Create a high priority class for the server. - Create a medium priority class for clients. - Create a low priority class for other traffic.- Create a traffic shaping profile with the classes defined above. - Assign guaranteed and maximum bandwidth percentages for each class to ensure fair allocation. - Apply the traffic shaping profile to the WAN interface for both inbound and outbound traffic shaping. - Ensure that the server class has the highest priority to receive full bandwidth when needed.  Monitor traffic patterns and adjust bandwidth allocations as needed to optimize performance.
you can refer this doc 
https://docs.fortinet.com/document/fortigate/7.4.1/administration-guide/647914/interface-based-traff...

VW