hello, On 3/11/08, fooler mail <[EMAIL PROTECTED]> wrote: > you cannot benefit the tcp offloading feature of a nic if you put this > on your box acting as a router... the basic mechanism of a router is > to route or forward packets based on the destination address... as the > packets pass on the router... router will only decrease the ip > header's ttl value, if the value is zero, it drops the packet and send > icmp type 11 (time exceeded) back to the sender... if the value is > non-zero.. recompute and updates the checksum in the ip header and > forwards on the next hop based on its routing table...
but the NIC consumes cpu power while it process traffic, right? im just thinking of offloading (saving) cpu task and put it in the nic w/ its onboard processor. cheap nics relies on main cpu power, while better (and expensive) ones have processor onboard. btw, i got this from google (a bit dated, but helpful): http://www.fefe.de/linuxeth/. > > ip routing is done on layer 3 while tcp offloading is done on layer 4.... well, i dont know that. im talking of the hardware support of some nics (eeepro oor 3com for example). maybe i missused the term "offloading" in my explanation, as there's actually a "tcp offloading" in some nics which may or may not be the same thing. anyway, thanks to all who replied ;) > > > fooler. > > _________________________________________________ > Philippine Linux Users' Group (PLUG) Mailing List > [email protected] (#PLUG @ irc.free.net.ph) > Read the Guidelines: http://linux.org.ph/lists > Searchable Archives: http://archives.free.net.ph > _________________________________________________ Philippine Linux Users' Group (PLUG) Mailing List [email protected] (#PLUG @ irc.free.net.ph) Read the Guidelines: http://linux.org.ph/lists Searchable Archives: http://archives.free.net.ph
