At 10:44 PM 3/12/2003 +0000, Orlando, Jr. Palomar wrote:
>Without consulting any documentation, a couple of reasons I could think of
>is forwarding rate and the switch-fabric (or the size of the backplane,
>usually in Gbps). A full-fledged Layer-3 switch running at "wire-speed"
>would be much more efficient in routing (and switching) between VLANs
>compared to a router.

Many routers route at wire speed and can do this on/between tagged 
VLANs.  This is just routing.

>Another point of comparison is port density. You can only have such and such
>number of ethernet, fastethernet, or maybe even gigabit ethernet ports on a
>router before the cost becomes quite prohibitive.
>
>Oh sure, you can use the "router-on-a-stick" method. And though it is a good
>Cisco IOS feature, it was meant to be an interim solution when transitioning
>from a flat to a segmented network.
>
>Anyway, if you only have a relatively small network, say 2 VLANs, you can
>opt for the "router-on-a-stick" method. Or better yet, use a router with
>dual ethernets or fastethernets. However, if you're supporting 4,5, or more
>networks, that's what L-3 and multi-layer switches are for.




Message Posted at:
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