[K12OSN] Setting up a Managed Switch

[Carl Keil <carl snarlnet com>]

Hi Folks,

I just bought a used 3Com Superstack 3, 26 port switch, with Gigabit 
uplink.  When I transfer all the ethernet cables over to it from a fully 
working install of K12LTSP with 7 clients.  The clients can't boot past 
a certain point.  They do the DHCP handshake ok, but they lock up trying 
to find the NFS server at 192.168.0.254.  When I move the cables back to 
the other switch, the clients boot normally and quickly. 

Can anyone diagnose my problem with the Superstack from that 
description?  What do I need to change?  I've telnetted into it via the 
serial port, but I'm bewildered by all the options.  I've never set up a 
managed switch before.  I'm wondering also, if I reinstall the BIOS or 
OS, or whatever it is on this switch, will it just work?  If I restore 
it to factory defaults?

Any thoughts would be appreciated.  I'm also wondering if there's anyone 
in the Portland area that would be willing to configure this switch for 
me, if I brought it over.  I feel a bit out of my depth.  I could pay, 
maybe $50, if that's not a completely insultingly small amount.

Thanks for any replies.

ck