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Re: layer 3 switch debate

  • From: Stephen Sprunk
  • Date: Fri Sep 27 13:13:32 2002

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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