Re: SVI Doubt

Hi fellas,

How does a L3 switch recognize that it should switch the packet or do the
routing engine. To my understanding If a frame is received with the SVI MAC
Address ( Virtual MC ) if there is a L3 Switch and it is running SVI
interface as its gateway..
And that is the gateway given to the host machine.

So when it receives a frame with SVI MAC, the packet will be send to the
routing engine.

Correct me if i am wrong

How does the L3 switch internally knows that frame is to switch or send it
to the routing engine? How does it decide ?

On Sun, Dec 25, 2011 at 6:44 PM, shiran guez <shiranp3_at_gmail.com> wrote:

> When performing a show version you can see:
>
> *Base ethernet MAC Address: *XX:XX:XX:XX:XX:XX
>
> That is the address used by the SVI (all of them)
> And all the other ports are incremented
>
> So
> F0/1 will be XX:XX:XX:XX:XX:X1
> F0/2 will be XX:XX:XX:XX:XX:X2
> ...
>
> On the MAC address table you can see the STATIC and normally the first MAC
> is the SVI's MAC, the others are the physical ports
>
> sh mac address-table | in STATIC
>
> For a SVI to transition to the port stat up/up
>
> You must have the following conditions:
>
> * vlan must exist in VLAN database
> * vlan need to be assigned to at least one switched port
> * and the port must be in STP forwarding state
>
> if all this are met the port will transition automatically, and that is
> what called SVI autostate
>
> Regards,
>
> Shiran Guez
>
> On Sun, Dec 25, 2011 at 2:47 PM, CCIE KID <eliteccie_at_gmail.com> wrote:
>
>> Hi fellas,
>>
>> I am having a SVI interface. when a host arp for the default gateway MAC,
>> the Layer three switch forwards the SVI Virtual MAC to the host . Where
>> does the SVI Virtual MAC ?. Is the virtual MAC gets stored in normal MAC
>> table ?
>>
>> Wat does SVI Autostate mean exactly. Can anyone explain me Autostate ?
>>
>> --
>> With Warmest Regards,
>>
>> CCIE KID
>> CCIE#29992 (Security)
>>
>>
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>>
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>
>
> --
> Shiran Guez
> MCSE CCNP NCE1 JNCIA-ENT JNCIS-ENT CCIE #20572
> http://cciep3.blogspot.com
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>
>

-- 
With Warmest Regards,
CCIE KID
CCIE#29992 (Security)
Blogs and organic groups at http://www.ccie.net