Paul Zirnik schrieb: > On Monday 30 July 2007 16:10, Ralf Gross wrote: > > > > My goal is to increase the bandwidth for a single tcp session between > > the two hosts for a backup job (per packet round robin?), not for > > multiple connections between many hosts. I know that I won't get 2 x > > 115Mb/s because of packet reordering, but 20-30% more that a single > > connection would be ok. > > > > I followed different HowTOs > > > > http://www.lartc.org/howto/lartc.rpdb.multiple-links.html#AEN298 > > http://lartc.org/howto/lartc.loadshare.html > > or something like: ip route...equalize via... > > > > but I never got a higher transfer rate between the two hosts than > > max 115Mb/s with benchmarks like netpipe or netio. > > If you have different switches for each line i suggest the use > of "bonding" in balance-round-robin mode. > > +-------+ eth0 +--------+ eth0 +------+ > | Host |--------|switch 1|--------| Host | > | | +--------+ | | > | A | eth1 +--------+ eth1 | B | > | |--------|switch 2|--------| | > +-------+ +--------+ +------+ I tried this setup a while ago. Both hosts were connected to a Cisco switch. On the linux hosts I created bond0 interfaces (round robin) and the switch ports on both switches were configured as Port Channels. +-------+ eth2 +----+ +----+ eth2 +------+ | Host |------ |PC1 | |PC2 | ------| Host | | | |_bond0_| |__ | |_bond0_| | | | A | | |SW1 | |SW1 | | | B | | |------ | | | | ------| | +-------+ eth3 +----+ +----+ eth3 +------+ This didn't increase the transfer rate for a tcp session between the two hosts. Because the mac and ip addresses are the same for the whole tcp session (backup). http://www.cisco.com/warp/public/473/4.html <quote> For example, if the traffic on a channel only goes to a single MAC address, use of the destination MAC address results in the choice of the same link in the channel each time. Maybe I'm missing something, but the Cisco people here told me the same. Ralf _______________________________________________ LARTC mailing list LARTC@xxxxxxxxxxxxxxx http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc
