On Sun, 18 Jun 2000, Michael Black wrote:
> On Sat, 17 Jun 2000, Christoph Lameter wrote:
>
> > Briding requires that the ethernet boards operate in promiscuous mode.
> > The CPU has to inspect all traffic to check if it needs to be forwarded to
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> > another interface... Having Ethernet boards not needing much processing
>
> I know it's a big cpu time consumer. And I could switch to 3Com
> EtherLink III (ISA) but I don't think it'll help a lot. I'll try in the
> morning just with PCI boards (as Alan sugested), but I don't think it'll
> help much. the traffic is still there. :) It feels like the processor it's
> not cathing up with the traffic (4 any interfaces in use). btw when all
> copying stops, everything's working great.
..
> ah... how speedy? I think a 450mhz is quite a runner. and the 100mhz fsb
> improves a lot.
You missed the point -- it doesn't matter how fast the processor is. The
processor is stalled while waiting for the ISA bus transaction to finish.
If it took 95% of a 286 to transfer the data over the ISA bus, it still
takes 95% of a 450Mhz CPU.
> eth2 Link encap:Ethernet HWaddr 00:00:21:4A:54:47
> <ISA> UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1
> RX packets:49850 errors:0 dropped:0 overruns:0 frame:0
> TX packets:46995 errors:0 dropped:0 overruns:0 carrier:0
Hmmm, that's not a lot of packets, unless you just started the network a
minute or two ago.
> here's ifconfig from a fresh boot, but I had _a lot_ of numbers in the
> frame section. and collisions to. hmm..those numbers are big just for the
> ISA adapters and backbone/eth1. I've talked with some friends and we
> agreed that bad cabling is responsible for collisions. but frames? huh..
Bad cabling will case frame errors. If you getting *any* frame errors you
should immediately track down the cause.
Donald Becker [EMAIL PROTECTED]
Scyld Computing Corporation http://www.scyld.com
410 Severn Ave. Suite 210 Annapolis MD 21403
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