IBM 8285 Nways, Installation And User Manual

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Status: NO ACTIVITY
Explanation: No physical layer activity is detected (either there is no cable/fiber attached, or there is no signal on the
Receive cable/fiber.
Steps to Take:
1. See if the port is enabled by entering the SHOW PORT command.
2. If the port is not enabled, use the SET PORT command to set the mode parameter to enable .
3. If the port is enabled, make sure that the remote device is operational and that its adapter is securely plugged in.
4. Make sure that the fiber/cable is securely plugged on the hub.
5. Perform the wrap test described in “ATM Port Wrap Tests” on page 161.
6. If the wrap test result is KO , the problem is associated with the workgroup switch.
7. For SC-type connectors, check that the receive and transmit cables/fibers are not swapped.
8. On SSI ports, make sure that you are using UTP/STP (ATM standard) cables to interconnect switches.
Status: NOT IN SERVICE (UNI port)
Explanation: Physical layer activity is detected (there is a receive signal on the Receive fiber/cable) but the remote
device is not responding to ILMI polling.
Steps to Take:
1. See if the port is enabled by entering the SHOW PORT command.
2. If the port is not enabled, use the SET PORT command to set the mode parameter to enable .
3. If the port is enabled, make sure that the remote device is operational and that its adapter is securely plugged in.
4. Make sure that the fiber/cable is securely plugged on the hub.
5. Perform the wrap test described in “ATM Port Wrap Tests” on page 161.
6. If the wrap test result is KO , the problem is associated with the workgroup switch.
7. The peer device does not support ILMI. Change the UNI port configuration to suppress ILMI.
8. A PVP with VPI=0 is or was defined on that port. Release the PVP and disable/enable the port.
9. The transmit wire/fiber of the cable is defective. Replace the cable.
10. The UNI port is defined with ILMI enabled, but the workstation connected to it has a device driver that does not
support the LECS well-known ATM address, and an LECS address is defined in your 8285.
Check that you have an LECS address configured in your 8285 with the command SHOW LAN_EMUL
CONFIGURATION_SERVER command. If there should not be any LECS address defined, clear it with the CLEAR
LAN_EMUL CONFIGURATION_SERVER ALL command.
11. Take traces from both the hub and the remote device for an IBM service representative.
Status: NOT IN SERVICE (SSI port)
Steps to Take:
1. Use the command SHOW PORT slot.port VERBOSE command to determine the problem.
2. There may be a problem of bandwidth availability on the module. Spread the SSI ports over several modules.
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IBM 8285 Nways ATM Workgroup Switch: Installation and User’s Guide