Hi Russ
Layer 3 switching is actually use the concept of "route once, switch many".
Its mean that the first packet is go through the route processor and the
subsequence packets is "switch" over to the destination port.
Layer 3 routing which is every packets is process by the router.
""Russell Lusignan"" <[EMAIL PROTECTED]> wrote in message
8r88h9$hp8$[EMAIL PROTECTED]">news:8r88h9$hp8$[EMAIL PROTECTED]...
> Layer 2 switching makes intelligent forwarding decisions based on MAC
> addresses. For example, if HostA is on port 1, and HostB is on port 2, and
> HostA sends a packet for HostB, the switch will only pass the traffic
> between those 2 ports (unless it's a broadcast).
>
> Layer 3 switching is basically a Router. It makes intelligent forwarding
> decisions based on the Network address, ie: IP address or IPX address. A
> layer 3 switch is basically a router with a lot of ethernet ports. Those
> ports can be divided up into VLANs and can route without the help of an
> external router or Route Switch Module for the Catalyst swtich.
>
> There is a lot of confusion out there about layer 3 switching, vendors
will
> brag about their product being able to do layer 3 switching etc..
Basically
> all they mean is that their product has routing (intelligent forwarding of
> layer 3 addresses) built into their box, without the use of an external
> router or module!
>
> Hope that helps!
> Russ..
>
> ""kenny"" <[EMAIL PROTECTED]> wrote in message
> [EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> > Hi all ,
> > Anyone care to explain the difference between Layer 2 and Layer 3
> switching ?
> >
> > Regards
> > ken
> >
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