Re: layer 3 switch debate

[ip dude <ipdude () cattle-today com>]

Since you are from Cisco...so it is your opinion that a Catalyst 6509 (i.e. Layer 3 switch) is equivalent to a 7206 or 
GSR? Of course, this is in regard to 'core' routing device in the middle of a national IP network. This network in 
question just happens to utilize a lot of GE LH interconnections.  

--- "Stephen Sprunk" <ssprunk () cisco com> wrote:
> Thus spake "ip dude" <ipdude () cattle-today com>
> > IP Community:
> >
> > When designing an all IP network requiring mostly Ethernet interfaces, the
> logical conclusion is to specify layer 3 switches (instead of routers). The cost
> per port and functionality requirements make a layer 3 switch the perfect
> choice. However, the rule of thumb in the IP community is that routers are
> superior to layer 3 switches and should be utilized instead, especially when
> considering core type functionality.
> > Does this rule of thumb still apply considering the modern layer 3 switches
> available? If not, why? What makes a layer 3 switch sub-standard to a pure
> router? Any quantitative analysis you could provide would be greatly
> appreciated.
>
>
> "switch" is a marketing term meaning fast, nothing more.  Any device that
> operates at Layer 3 is a router by definition.  Therefore, "Layer 3 switch"
> means "fast router".
>
> Now think about your question again.
>
> S

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