Solving Other Problems 221An error occurs when the utility attempts to transfer the file. Therecould be a number of reasons for this: The null modem cable has become disconnected from the Switch orthe PC during the file transfer. Reconnect the cable and start again. Power to the Switch has been disrupted during the file transfer.Check the power connection to the Switch and start again. An incorrect file is being specified and transferred to the Switch.Check the filenames and start again.Solving OtherProblemsYou see network problems and a Packet LED is lit continuously dueto constant collisions. You are using PACE-equipped devices and PACEis enabled at both ends of the link. PACE must only be enabled at oneend of the Switch–device link. Disabling PACE for a port is described in“Configuring a Port” on page 59.You have added the Switch to an already busy network, andresponse times and traffic levels have increased. You may haveadded a group of users to one of the Switch ports via a hub, and notdisabled half duplex flow control for the port. Disable half duplex flowcontrol for all ports that are operating in half duplex and are connected tomultiple devices using a hub. Disabling half duplex flow control isdescribed in “Configuring a Port” on page 59.You have enabled auto-negotiation for a 10BASE-T/100BASE-TXport, and you are seeing a large number of late events on the port.The port connected to the Switch is not auto-negotiating and is operatingin full duplex: If you want the link to operate in full duplex, set the port on theSwitch to operate in full duplex. For more information, see“Configuring a Port” on page 59. If you want the link to operate in half duplex, set the port on the otherend of the link to operate in half duplex. For more information, seethe documentation supplied with the remote device.
