[c-nsp] Layer 3 Switch operation

[Kristofer Sigurdsson]

Hi,

There are basically two ways (assuming you're talking Cisco);

1. Physical interfaces can be defined as L2 or L3 interfaces.  The
switch will act according to this.

2. A logical "Switched Virtual Interface" (SVI) can be created (one or
more) and placed in a VLAN in which one or more L2 ports are members.
This means packets will be L2 switched and L3 switched if they are
destined for the SVI logical interface.

-Kristo

2006/8/8, Sam Jacob <samj at tataelxsi.co.in>:
> Hi All,
>
>
> I have a question on the operation of  layer3   switches.
>
> Since Layer 3 switches can do Layer 2 also , How will a Layer 3 Switch know
> it has to do a Layer-2 or Layer 3 forwarding when an Ethernet frame comes
> in.
>
> Regards,
>
> Sam Jacob
>
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