North American Network Operators Group

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Internet Building topology

  • From: Stephen Balbach
  • Date: Tue Aug 05 14:36:58 1997

Hi,

I am designing an "Internet Building" concept using ethernet. Below is a 
model using 2 cisco Catalyst 1912's (12 port ethernet switch) and a 
cisco 2501.

Switch 2 is on the 2nd floor and Switch 1 is in 1st floor. Does this 
look like a viable topology? Are there other/better ways to approach 
this for scaleability? Thanks for any ideas/experiences.


        x.x.x.0  /26 (Customer 2nd floor)
        |
        |   x.x.x.64 /26 (Customer 2nd floor)
	|   |
        |   |
	Switch 2 (2nd floor)			
	A | B | C	VLAN 1 = A+C 
		|	VLAN 2 = B+C 
		|
		|
		| (cable drop between 1st and 2nd floor)
		|
		|
		|
	Switch 1 (first floor)
	A | B | C	VLAN 1 = B + C
            |		
	    |
	cisco (first floor)
	ip secondary x.x.x.0  /26
	ip secondary x.x.x.64 /26
            |
            |
	    |
       T1 to Internet
	    |
	    |