FICON Administrator's Guide v6.4.0 (53-1001771-01, June 2010)

FICON Administrator’s Guide 63
53-1001771-01
Common FICON issues
5
When using multimode fiber, make sure that all fiber is either all 50u or all 62.5u. A common
mistake is to mix 50u and 62.5u fiber cables, which causes errors at patch panels.
Example of a Boxed Channel
In this example, the customer complained that the CHPIDs with 2-byte addressing did not come
online. He was instructed to configure the CHPID offline and then try to configure the CHPID back
online.
MVS console commands and responses (lines beginning with “IEE” are responses and all other
lines are entries.):
CF CHP(60),OFFLINE
IEE503I CHP(60),OFFLINE
IEE712I CONFIG PROCESSING COMPLETE
CF CHP(60),ONLINE
IEE754I NOT ALL PATHS BROUGHT ONLINE WITH CHP(60)
IEE502I CHP(60),ONLINE
IEE712I CONFIG PROCESSING COMPLETE
The line below displays the status of the CHPID with the “D M =” command. All other lines are
responses:
D M=CHP(60)
IEE174I 03.29.45 DISPLAY M 021
CHPID 60: TYPE=1D, DESC=FICON INCOMPLETE, ONLINE
DEVICE STATUS FOR CHANNEL PATH 60
0 1 2 3 4 5 6 7 8 9 A B C D E F
006 . $@ . . . . . . . . . . . . . .
SWITCH DEVICE NUMBER = NONE
ATTACHED ND = NOT KNOWN
PHYSICAL CHANNEL ID = 01F0
************************ SYMBOL EXPLANATIONS ************************
+ ONLINE @ PATH NOT VALIDATED - OFFLINE . DOES NOT EXIST
* PHYSICALLY ONLINE $ PATH NOT OPERATIONAL
The responses “NOT ALL PATHS BROUGHT ONLINE” after attempting to configure the CHPID online
and “FICON INCOMPLETE” after the display command indicate that the channel did not come
online. This is determined because the IEE error types are shown and combined with validating that
there was no attempt to do a basic FLOGI (no light displayed on the port view (LED) and no Fibre
Channel frames were received).
Symptom The Control Unit Port cannot access the switch.
Probable cause and recommended action
A 2-byte CHPID (channel path identifier) link is defined using a domain and port ID that must
remain consistent. Any change in the physical link, such as a change in a domain or port ID, will
prevent storage control unit access.
Use the configure command to verify and set the insistent domain ID (IDID) parameter.
FICON:admin> configure
Configure...
Fabric parameters (yes, y, no, n): [no] y
Domain: (1..239) [97]