How switch reads frames?

[chandra_rc16]

How the switch process/read the received frames? Is there any difference in reading normal ethernet frames and dot1Q tagged frames and also ISL frames ?

Can somone please explain or else a link/doc is fine?

Regards,

Chandu

[acampbell]

Chandu,

Have a wee look at this link:-

http://www.cisco.com/en/US/tech/tk389/tk689/technologies_tech_note09186a0080094665.shtml

ISL - Proprietry cisco -  Inserts a new ISL header infront of the original etherenet header

802.1Q is multi vendor - Inserts a 4 byte TAG fild after the source address field and recomputes the FCS

Regards,
Alex.
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