Network Design

[msaeed]

i am designing a new architecture for my network. i have the below devices and network component 

• ISR 4331 router
• 2 core switch C9470 
• 2 cisco firewall 1150
• CT3504 wireless controller
• and access switches 9300 and 9200
• i will have around 5 internet fiber lines
• servers for  LAN and servers will be accessed from the internet 
• around 20 VLAN

what is the best practice design for my network?

[marce1000]

 - Note , in essence this isn't really a question for the forum , which targets 'short-lived' practical and technical questions. In that context you can better work with a re-seller or integrator for solid advice. That costs money indeed, but you will also create a stronger case for your business and you handoff responsibilities somewhat.

 M.

[msaeed]

i already have re-seller. but I am afraid that the design they suggested is not the best practice. therefor i am seeking the experts advice here 

[Leo Laohoo]

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@msaeed wrote:

but I am afraid that the design they suggested is not the best practice. therefor i am seeking the experts advice here 

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Without knowing a lot about this network there is not a lot to say other than "engage a reputable system integration".  
Sure, the list of equipment is nice but "what are you trying achieve" is the best question that needs to be asked.

[marce1000]

         - What design was suggested , why did you not like it ?

 M.

[msaeed]

• they connected the internet direct to the firewall. router removed 
• the make firewall the default gateway for all VLAN. all routing on the firewall