Question on IP packet rewrite in multilayer switch.

[minumathur]

Hi All

I slightly confuse about between Tradional packet fowrding in router and IP packet rewrite in Multilayer switch using CEF.As per my understanding in traditional packet forwarding when packet travelling from router to router it keep changing soure MAC and destination MAC on HOP by HOP basis in router while IP address for source and destination remain unchange then what is difference between traditional IP packet forwarding and Multilayer switching forwading

summary i need to understand IP rewrite mothod in Mulitilayer switch. appriciate if someone explain me in detail.

thank you.

Minu

[paolo bevilacqua]

Both a traditional router and a layer-3 switch do the same exact re-writes in a packet :

- mac src/address

- ip ttl

- ip checksum

- ethernet CRC.

And nothing else.