DUA1840-0AAA01Switch 1005 Operation Problems 6-5You cannot see internal backplane connection E3 (port 27) on anyscreen.Backplane connection E3 (port 27) disappears from all screens ifthere is an expansion module fitted to your Switch 1005 and youhave four 4 Port 10BASE-T Transceiver Modules installed. Port 27 willreappear and will be fully manageable if you remove one 4 Port10BASE-T Transceiver Module.You have added the Switch 1005 to an already busy network, andresponse times and traffic levels have increased.You may have added a group of users to one of the Switch 1005ports via a repeater or switch, and not turned off IFM. Turn off IFMon any port that is connected to multiple devices. See “Port Setup”in Chapter 3.You have a chassis with a Management Module and at least oneSwitch 1005 module installed, and you have just installed anotherSwitch module. One or more of the backplane LEDs arecontinuously lit.You have installed the latest Switch 1005 into the chassis when thechassis and the Management Module were powered off, and due tothe way the Management Module behaves when it is powered on(see “Operation after Power-up” in Chapter 2), this has caused anetwork loop on the chassis backplane. With the chassis andManagement Module powered on, remove the latest Switch 1005and insert it into another slot. If there are no spare slots, insert amodule of a different type into the slot vacated by the Switchmodule for 30 seconds, and then replace that module with theSwitch module.You have more than one Switch 1005 in your chassis. The networkdoes not appear to pass traffic, and one or more of the backplaneLEDs are continuously lit.You may have caused a network loop on the chassis backplane.See “Advice for Setting Backplane Connections and Avoiding Loops”in Chapter 2.
