WAN design

November 27, 2009 at 09:38:17
Specs: Windows Vista
I am a networking student.I am designing a network topology for a WAN which has a HQ and three branch offices.HQ has layer 3 switching, 2 of the branches are connected to HQ via frame relay and the third via DSL. HQ has 120 hosts and 30 20 and 10 at brances. I am using a class c for my network address I just need help with the layout of the IP scheme I know how to subnet but not quite sure how and where to implement the addresses ie Serial ports between routers

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November 27, 2009 at 11:45:06
No need for subnetting per say. You have to clearly understand the physical setups before you can apply a ip plan.

Frame Relay means multiple links on one interface.
Layer 3 switch at main really doesn't come into play at layer 3 unless it has a FR interface. Usually you just have a FR router with sub interfaces at HQ. You can't go from FR to dsl so you need dsl/cable at the HQ to connect.

Looks like this:

Site1router sub1<>HQ FR router sub1
Site2router sub1<>HQ FR router sub2

DSL will require VPN preferably site to site vpn.

IP plan would look like this;
HQ = 192.168.0.x
Site1 = 192.168.1.x
Site2 = 192.168.2.x
Site3 = 192.168.3.x

Between HQ sub1 and sub2 and site1 and site2 can be any ip you want to use.
site1 wan to hq wan
site2 wan to hq wan

dsl site3 isp provided wan ip to dsl hq isp provided wan ip [one end of either should be a static ip for easier setup of the vpn]


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November 27, 2009 at 16:33:18
thanks im using packet tracer 5.2 to make this wan so im prob gonna have to use a wan emulation in place of a fr router

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November 27, 2009 at 21:11:48
Good luck with that.

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