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Network design help

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Last Modified: 2012-06-21
Hi Experts,

we are setting up a new office. I need a help in designing network . We will have all our servers at the datacentre. So basically all we have at out premises will be some routers , firewalls and switches.

 can you please advice how many devices i need layer 3, layer 2 and firewall . It will be good if you can please tell what cisco devices should i use.

We have about 75 users . PC's & voip phones POE enabled. printers  , wireless routers.
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Commented:
so if i understand it correctly you will have an office with internet connection, 75 users and added voip phones and printers etc.


you would need 1 firewall that also sets up the vpn to the datacenter.
2 or 3 switches depends on how many users use the wifi and not cables.

what devices are up to you.. basically you need to know what equipment there is in the datacenter to ensure you can setup a vpn.. that is the delimiter on the firewall. the switch and access points are pretty straight forward so you basically can use any..

I would use cisco clusters for the switches and maybe have a redundant firewall with auto failover.
Senior IT Manager
Commented:
Equipment purchase depends on your redundancy requirements.

Minimun for one site without failover
CISCO Router 1841/2900 =1
ASA 5510 =1
CISCO Catalyst 3750 (Core Switch)=1
CISCO 2960 (Access Switch)=2

Note 2960 is not POE switch, if you required POE should go for 3760 switches...
Top Expert 2010

Author

Commented:
Thanks for quick feedback .

We are going to have an 100MBps dedicated link to Datacenter.

Currently i have following devices:
cisco 3750 - 2 of them
cisco 2960
cisco 3560
cisco 5510 -- i believe this is firewall


Can you please advice further what else i will need and how can i use above devices at the best. like which device can i use as a default gateway that will route the traffic accordingly.

Appreciated your help
Top Expert 2010

Author

Commented:
sorry sumod i didn't read your post. i am going to start designing a diagram and post it back.
sumod_jacobSenior IT Manager

Commented:
Above device is enough to design a simple network.. Create Vlans in core switch (3750) and make switch as your gateway..
Top Expert 2010

Author

Commented:
Hi ,

I have attached a network diagram. please advice accordingly
test-network-diagram.jpg
sumod_jacobSenior IT Manager

Commented:
You may need to redesign in following order from top.

Internet
Router
ASA Firewall
COre Switch
Access Switch...
Top Expert 2010

Author

Commented:
Please advice accordingly.

I am not at all good at networking.
updated-test-network.jpg
Top Expert 2010

Author

Commented:
Can anyone please help me set the VLANS .

I would like to use cisco 3750 switch for VOIP traffic and rest all for data.I think there will be two VLAN's

1 for voip traffic and another for rest of the traffic.
Top Expert 2010

Author

Commented:
Hi experts,

I have designed attached diagram , please review it and let me know if you think anything is wroing.

Thanks
sample-network-diagram.jpg
Top Expert 2010

Author

Commented:
Thanks Guys

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