network throughput over a wireless access point is bad for LAN traffic, yet good for internet traffic

[Net Llama!]

I've got an bunch of 802.11b hardware (wireless access point WAP, pcmcia
cards) setup at home, connected to a wired network via a 100Mb Netgear
switch.  The same switch is also connected to the border
router/NAT/firewall box which goes out to the DSL modem/internet.  I've
had this setup for years, and haven't made any changes to it since setting
it up originally.

Over the past few weeks, I've noticed that all network traffic over the
WAP that is local (just on my home LAN) is horribly slow (like 1KB/s
slow), yet all traffic over the WAP to/from the internet is fine (about
1.5Mb/s).  I've tried scp/http/nfs and all of them are slow as can be
possibly imagined when between LAN systems (both between wireless systems,
and between wireless & wired systems). The problem does not exist between
wired systems.  There are no errors in dmesg/messages, its just like
something is swallowing 99% of the packets.

All the systems (wireless and wired) are running FC5-x86, however there
are no firewalls or traffic shaping on the LAN,  just on the border
router/firewall/NAT box, which is never in the equation except for traffic
going to/from the internet (where this problem never appears).

Anyone have any troubleshooting suggestions/ideas?

-- 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Lonni J Friedman                        netllama at linux-sxs.org
LlamaLand				http://netllama.linux-sxs.org