Are you sure you wouldn't connect to the outside interface? If you think of it logically you are going from LAN->router->outside->inside->LAN right?If that's the case you need to use the outside VLAN and create a route from that network to the inside...
I've never had a mac pause when just appletalk was dropped. You could test it by pinging the IP address of the mac and watch it when it drops. If TCP/IP is still responding it's an appletalk issue, if you can't it's probably lower on the ladder tha...
Just to counter this point, we have a few mac's and I've never seen what you mention above in the numbers that you seem to be suggesting. I've seen a few machnines connected to a few switches that worked better if they were not set to auto-neg, but ...
We installed a Xante printer this summer too and, not to suggest that it's causing your problems, but it was set up for DHCP, and it started flooding our network. Our DHCP server was dutifully responding to the DHCP requests, but the xante was ignor...