IBM 2074 Installation And Maintenance Information page 39

3. When the ESCON adapter device driver is loaded successfully and the Channel
Adapter has been IML'ed, the scrolling LED Display messages will contain
"Channel offline". This indicates that the ESCON adapter is operational but the
first Establish Logical Path (ELP) has not yet been received from the host
channel connected to the 2074. Once a logical path has been established
between the 2074 and the host, the LED Display scrolling message will contain
"Channel online".
If ESCON connectivity between the host and the 2074 still has not been
established, the following should be considered:
v If the LED Display scrolling message contains "Channel online", then you
have a configuration problem and not a media (cable, trunk, etc) NOR a 2074
ESCON adapter hardware problem. If you suspect that there may be a
configuration problem, see the "2074 Console Support Controller
Configuration Guide" and the appropriate host I/O configuration
documentation.
v If the LED Display scrolling message contains "Channel offline" and "No
light", then you may have either a configuration, media (cable, trunk, etc), or
2074 ESCON adapter problem. First you should make sure both ends of the
ESCON cable are properly seated. Unplug each end one at a time and plug
plug it back in. Make sure there is a "click" heard when the cable connector
is inserted into the receptacle. When you unplug the cable connector at the
2074 ESCON adapter, the LED Display should say "DARK". When you plug
the cable connector back into the 2074 ESCON adapter, the LED Display
should say "LITE". If this does not occur, you should also clean the ends of
the ESCON cable and receptacle with a Fiber Optic Cleaning Kit. At this
point, if the LED Display scrolling message on the ESCON card still contains
"Channel offline" and "No light", then you need to conduct ESCON Link Fault
Isolation. Further ESCON Link Fault Isolation is beyond the scope of this
manual. You should proceed with ESCON Link Fault Isolation procedures that
you are familiar with and that are appropriate to the Host system to which the
2074 is connected. This may include taking light measurements with a light
meter.
Note: There are no ESCON wrap tests that can be run at the 2074 ESCON
adapter.
v From an OS/2 window, you can use the BTITOOL to display neighbor node
information and to display code violation and bit error counters. Each
command will need to be run once for each of the adapters, or better yet, for
the ESCON adapter whose link state you are trying to debug. The command
is run from an OS/2 Window.
v Use BTITOOL SHOW NEIGHBOR INFO CARD=x (where x=0 or 1) for
neighborhood node information.
Sample output:
Note: Values in ()'s are EBCDIC values in HEX.
Channel is currently: Connected
Flags field:
Node Parameters: 0x00 0x0A 0xE5
Type Number:
Model Number:
Manufacturer:
Plant:
Serial Number:
( F0 F0 F0 F0 F0 F0 F0 F4 F1 F2 F5 F6 )
Tag:
0x00
009032 ( F0 F0 F9 F0 F3 F2 )
005 ( F0 F0 F5 )
IBM ( C9 C2 D4 )
02 ( F0 F2 )
000000041256
0x00 0xE1
Chapter 2. Maintenance Information
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