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Cam & TCAM,Backplane speed

                   1)Can any one brief me about difference between CAM & tcam?    

                   2)Back plane speed of 4507 R ,4507E , 6509,6509E

I had gone through lot of doccuments but ther are confusing.

Thanks

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Cisco Employee

Cam & TCAM,Backplane speed

Hi Ranjith,

I can answer only the 1st question.

1)Can any one brief me about difference between CAM & tcam?   

CAM performs quick lookup based on exact match on the given search key. TCAM performs quick lookups based on search key and a mask that identifies which bits of the search key must be matched. In essence, a CAM looks up a single record - the one matches the search key precisely, while a TCAM looks up an entire set of similar records that match the "interesting" bits of a search key (the "interesting" bits are identified by the mask).

Best regards,

Peter

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