On Sat, Jan 17, 2004 at 12:50:04AM +0100, Sten Daniel S?rsdal wrote: > > Apologies for the cross-post, i wasnt sure if this was hackers or net material. > > I've often wondered why ip checksumming is done on every incoming > packet and not only on the packets that need to be delivered locally. > It looks like a very expensive way of doing it, especially on high > PPS. Basically all hosts do checksumming so why not just pass the bad > packet on, making the forward process alot cheaper (cpu wise)? > > I ran some tests (unable to disclose results) by removing it completely > and it seems to make a noticable impact on the performance. > Especially on for example gaming services where there is a high PPS versus > actual data. > > Besides that i'd like to add that FreeBSD has the fastest forwarding engine > i've seen on any free OS. It's in my opinion a very suitable OS for > routing/forwarding. > Have you tried ``sysctl net.inet.ip.fastforwarding=1''? It's documented in the inet(4) manpage.
Cheers, -- Ruslan Ermilov FreeBSD committer [EMAIL PROTECTED]
pgp00000.pgp
Description: PGP signature
