[OpenAFS] Heavy performance loss on gigabit ethernet

[Systems Administration]

> You're not making any sense.  You say the client has a 1000 Mb 
> interface,
> but operates at 100 Mb and is connected with copper at 10 Mb.  You say 
> the
> server has a 1000 Mb fiber card but runs at 100 Mb.  I didn't even 
> know you
> could run 100 Mb over a gigabit fiber interface.

Possibly misspoke - client has gigabit copper NIC (Apple Powermac G4 
blue&white digital audio, dual processor) - it is attached to a 100Mb 
copper switch which has a fiber uplink to the gigabit fiber switch.

Server has a gigabit fiber NIC (GA620) which can be forced to operate 
at 100Mbs mode by module configuration options (really just a rate cap) 
and the fiber switch is accordingly set on that port to operate at 
100Mbs.  I'm really only providing this info to show that I have made a 
good faith effort to ensure that this is not a foobar of the ethernet 
infrastructure - I have ruled out duplex issues, flow control and link 
speed as potential sources of this problem.