On 1/30/06, Andrew Sharp <[EMAIL PROTECTED]> wrote: > C -> A will end up at 1500 since C can only do 1500, obviously. B -> A, > your switch is choking, is my *guess*. > > I suspect your switch it not working as well as you think it is, > unfortunately. Is it firmware upgradeable? If so, check for updates. > Also check the Dell forums. I have a unmanaged Dell switch, it exhibits > the same behavior. Unfortunately, not upgradeable in my case ~:^(
I sure hope not! It's a Dell PowerEdge 5324, and it touts all sorts of goodies. > You should get better than 50MB/s however. What are the NICs? Using a > hacked version of netcat, to eliminate disk I/O from the picture, I see > steady 90ish MB/s. Between two 64/66 Intel NICs across my Dell switch. > Between any other NIC hardware combos, I see 70-80 MB/s max. Actually, > the only other hardware I have that isn't 32bit is a Broadcom 57XX, also > 64/66. All the servers are identical config: * Dual-core Opteron 175 * 2x1 gig DDR3200 ECC * Seagate 250G SATA * Serverworks HT1000 chipset on a Supermicro H8SSL-i motherboard (specs: http://www.supermicro.com/Aplus/motherboard/Opteron/HT1000/H8SSL-i.cfm) * appears to be Dual-port Broadcom BCM5704C Gigabit LAN / Ethernet Controller Are there any sort of sysctls or echo foo >/proc/somesettings that might help get more benefit out of jumbo frames? No magtter what I would expect it to at least be the same speed. Not 10x worse.
