This doc should hopefully clear things up.http://cisco.com/en/US/docs/ios/iproute/configuration/guide/irp_cfg_eigrp_ps6350_TSD_Products_Configuration_Guide_Chapter.html#wp1054641HTHJonathan

Try installing a TFTP Server that can support larger file sizes like TFTPDWINHTHJonathan

Technically is would be 3072, But I'm pretty sure it's managed based on the email from AT&T. He will use the Ethernet port on his router and set the proper IP/Mask and Default GW. Very simple setup. He may have to run the Ethernet cable from the D...

It sounds like your 4006 maybe loosing connectivity to whatever Upstream device is providing the gateway to your 4006. Have you checked the upstream device?HTHJonathan