Brocade Troubleshooting and Diagnostics Guide v6.1.0 (53-1000853-01, June 2008)

Fabric OS Troubleshooting and Diagnostics Guide 79
53-1000853-01
Chapter
10
FICON Fabric Issues
This chapter discusses FICON issues, recommended actions, and additional information you
should gather to fix your issue. Any information you need to verify that FICON has been set up
correctly can be found in the Fabric OS Administrator’s Guide.
In this chapter
•FICON issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
•Troubleshooting FICON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
FICON issues
Symptom The Control Unit Port cannot access the switch.
Probable cause and recommended action
A two 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 domain or port ID will prevent storage
Control Unit access.
Use the configure command to verify and set the Insistent Domain ID parameter.
FICON:admin> configure
Configure...
Fabric parameters (yes, y, no, n): [no] y
Domain: (1..239) [97]
R_A_TOV: (4000..120000) [10000]
E_D_TOV: (1000..5000) [2000]
WAN_TOV: (0..30000) [0]
MAX_HOPS: (7..19) [7]
Data field size: (256..2112) [2112]
Sequence Level Switching: (0..1) [0]
Disable Device Probing: (0..1) [0]
Suppress Class F Traffic: (0..1) [0]
Per-frame Route Priority: (0..1) [0]
Long Distance Fabric: (0..1) [0]
BB credit: (1..27) [16]
Insistent Domain ID Mode (yes, y, no, n): [yes] <== this should be set to ‘y’
[truncated output]
FICON:admin> configure