IBM 2109 Service Guide - Page 54

Some ports fail to communicate action (action 4)

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customer. If the ready LED is not on and the power supply LEDs are on, replace the chassis. See "Replacing the chassis with touchpad" on page 50. Some ports fail to communicate action (action 4) | You are here because of one or more of the following reasons: v You started from the service action for total switch failure and observed that the power supply LEDs and the switch ready LEDs are functioning normally. v The customer reported that only some ports were failing while others were operating normally. v You have a steady yellow LED, and the customer is unable to correct it by making the attached device ready. It is necessary to determine if the switch has failing GBICs, a failing system board, bad cables, or if the customer configuration is wrong. 1. Determine what port or ports are failing. If you cannot determine which ports are failing, go to step 9. 2. Verify that all GBICs and cables are present and are seated in their appropriate ports. Reseat the cables and GBICs and reattempt communications. 3. If it is not possible to reattempt communications or if the attempt again fails, remove the incoming cables from the failing ports. Mark the cables when you do this so that you can return them to the same port. 4. Remove and reseat the GBICs. 5. Insert one of the small single-GBIC port-wrap connectors (black if the GBIC is shortwave or gray if it is longwave). Wait 10 seconds and observe the associated port LED. If it is flashing green, the GBIC and port are both functional. Do this for all suspect ports. If all ports show a flashing green port indicator, it will be necessary to check other customer configuration information or the associated fibre-channel cables. See "Checking the customer configuration action" on page 42 and "Suspect fibre-channel cable action" on page 42. 6. If any port does not flash green and you have another port and GBIC to use for a test, swap the GBICs between the ports and try the wrap again. If the failure (not flashing green) stayed with the port, replace the system board. If the failure followed the GBIC, replace the GBIC. In either case, see "Replacing the system board assembly" on page 49. When replacing the board, mark all cables and GBICs to ensure that they are returned to the same slots. Replacing the system board disrupts the switch operation. Ensure that all traffic on the switch is paused. 7. If other ports are available but not other GBICs, insert the suspect GBIC and wrap connector in an empty port. If the associated port indicator flashes green, reseat the GBIC and wrap connector in its original port. If the associated port indicator does not flash green, replace the system board. If it does flash green, the problem was a poorly seated GBIC. 8. If you only have this one port available and all others are functional, replace the GBIC. See "Replacing a GBIC module" on page 47. 9. If the customer is unsure what cables, ports, and other hardware are associated with the failure, start by looking for unseated cables or GBICs, and determine if these are related to the failure. If they are, reseat the GBICs and cables and reattempt communications. 10. If the previous steps did not resolve the problem, or if it is not possible to reattempt communications to verify correct switch function, continue with this procedure to ensure that the switch is good through the associated GBICs. 38 IBM SAN Fibre Channel Switch: 2109 Model S16 Installation and Service Guide

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customer. If the ready LED is not on and the power supply LEDs are on,
replace the chassis. See “Replacing the chassis with touchpad” on page 50.
Some ports fail to communicate action (action 4)
You are here because of one or more of the following reasons:
v
You started from the service action for total switch failure and observed that the
power supply LEDs and the switch ready LEDs are functioning normally.
v
The customer reported that only some ports were failing while others were
operating normally.
v
You have a steady yellow LED, and the customer is unable to correct it by
making the attached device ready.
It is necessary to determine if the switch has failing GBICs, a failing system board,
bad cables, or if the customer configuration is wrong.
1.
Determine what port or ports are failing. If you cannot determine which ports
are failing, go to step 9.
2.
Verify that all GBICs and cables are present and are seated in their
appropriate ports. Reseat the cables and GBICs and reattempt
communications.
3.
If it is not possible to reattempt communications or if the attempt again fails,
remove the incoming cables from the failing ports. Mark the cables when you
do this so that you can return them to the same port.
4.
Remove and reseat the GBICs.
5.
Insert one of the small single-GBIC port-wrap connectors (black if the GBIC is
shortwave or gray if it is longwave). Wait 10 seconds and observe the
associated port LED. If it is flashing green, the GBIC and port are both
functional. Do this for all suspect ports. If all ports show a flashing green port
indicator, it will be necessary to check other customer configuration information
or the associated fibre-channel cables. See “Checking the customer
configuration action” on page 42 and “Suspect fibre-channel cable action” on
page 42.
6.
If any port does not flash green and you have another port and GBIC to use
for a test, swap the GBICs between the ports and try the wrap again. If the
failure (not flashing green) stayed with the port, replace the system board. If
the failure followed the GBIC, replace the GBIC. In either case, see “Replacing
the system board assembly” on page 49. When replacing the board, mark all
cables and GBICs to ensure that they are returned to the same slots.
Replacing the system board disrupts the switch operation. Ensure that all
traffic on the switch is paused.
7.
If other ports are available but not other GBICs, insert the suspect GBIC and
wrap connector in an empty port. If the associated port indicator flashes green,
reseat the GBIC and wrap connector in its original port. If the associated port
indicator does not flash green, replace the system board. If it does flash green,
the problem was a poorly seated GBIC.
8.
If you only have this one port available and all others are functional, replace
the GBIC. See “Replacing a GBIC module” on page 47.
9.
If the customer is unsure what cables, ports, and other hardware are
associated with the failure, start by looking for unseated cables or GBICs, and
determine if these are related to the failure. If they are, reseat the GBICs and
cables and reattempt communications.
10.
If the previous steps did not resolve the problem, or if it is not possible to
reattempt communications to verify correct switch function, continue with this
procedure to ensure that the switch is good through the associated GBICs.
38
IBM SAN Fibre Channel Switch: 2109 Model S16 Installation and Service Guide
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