Cisco 5505 and Linksys EF2s24

[peterkrich]

I have a Cisco 5505 that I have been using for four years. Cat 5 lines from clients have gone into Cisco 1900 hubs which were fibre uplinked to 5505. Have replaced most of the 1900's with Linksys ef2S24 10/100 switches w/fibre uplink to 5505. A DOS copy of 100 files from a client on one linksys switch through 5505 to a client on another linksys switch will fail after 25 or 30 files are copied (device not present error). If clients are connected to cisco 1900 hubs, the copy finishes fine. If both clients are on a single linksys switch, copy also finishes fine. Fiber ports on both linksys and cisco switches are set at half duplex

I would appreciate any thoughts anyone would have.