3Com 6416SW Installation And User Manual

Communication Problems in an IBM LAN Emulation EnvironmentThis section details the problems that may occur during the setup of the IBM LANemulation environment. Such an environment may include concentrators (ONsembleATM Workgroup Concentrator) and bridges (4404B), the external IBM LAN EmulationServer (LES), workstations (WS), ATM Workgroup Switches (4412SW), and the ONcorehubs.A workstation/bridge cannot connect to another workstation/bridge.Steps to Take:1. Using the LES monitor, check in the list of registered end stations that bothworkstation/bridge addresses are present. If you do not know the ATM addresses ofyour workstation bridge, use the ATMC Interface Configuration panel for the portsattached to your workstation/bridge. If both addresses are registered in the LES,then proceed to point 2).If one workstation/bridge address is missing, then use the Call Status Historyprovided by the LES monitor to get the Q2931 cause of the failing call. The missingstation/bridge has probably a wrong LES ATM address defined in its configuration.Check the missing station's configuration.2. Both workstation/bridges are registered to the LES, but one cannot call the otherone, because the LES is not available any more (port disabled, or not-in-service).The LES does not tell you that it has lost its address, because it only tells that oncethe connection to the ONcore hub/CELLplex 4000 is returned.Check that the LES cable is well plugged, then check that the LES port is enabled.If it stays enabled and not-in-service, then the LES is faulty. Contact your 3Comrepresentative for investigation, or re-boot the LES.7-39