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

FICON Administrator’s Guide 51

53-1001771-01

Traffic Isolation Zoning

If fmsmode is enabled in a configuration file, but is disabled on the switch, the configDownload

command fails and displays an error message. This prevents undesirable conditions that could

result from enabling fmsmode on a switch that does not require it.

Traffic Isolation Zoning

Traffic Isolation (TI) Zoning allows data paths to be specified. In a FICON fabric you need Fabric OS

v6.2.0 or later. TI Zoning has the following benefits:

• Separates direct attached storage device (DASD) and tape traffic.

• Selects traffic for diverse ISL routes (typical of dual fiber networks).

• In conjunction with long-distance channel extension equipment (FICON Acceleration),

guarantee bandwidth for certain mission-critical data.

For more information on Traffic Isolation Zoning, refer to the Fabric OS Administrator’s Guide.

Determining Ports for the TI Zone

To find the device ports, use the MVS display command. The following example shows how to

determine where device D000 is connected and the paths to it, from the MVS console enter:

D M=DEV (D000)

Response is:

DEVICE D000 STATUS=ONLINE

CHP 9C 9D 9E 9F

ENTRY LINK ADDRESS 883C 883D 883E 883F

DEST LINK ADDRESS 790C 790D 790E 790F

PATH ONLINE Y Y Y Y

CHP PHYSICALLY ONLINE Y Y Y Y

PATH OPERATIONAL Y Y Y Y

MANAGED N N N N

CU NUMBER D000 D000 D000 D000

MAXIMUM MANAGED CHPID(S) ALLOWED: 0

DESTINATION CU LOGICAL ADDRESS = 10

SCP CU ND = 002107.921.IBM.07.000000002036.0086

SCP TOKEN NED = 002107.900.IBM.07.000000002036.1000

SCP DEVICE NED = 002107.900.IBM.07.000000002036.1000

Enhanced TI Zoning

Enhanced Traffic Isolation Zones allow you to specify a preferred and exclusive path through a

cascaded fabric for a particular flow by defining a set of devices or ports to appear in more than

one Enhanced TI zone. A preferred path is one that has failover enabled and an exclusive path has

failover disabled. An exclusive path in the following topologies is beneficial as it will limit the

number of hops between directors:

• triangular

• System Data Mover

• emulation

Enhanced TI Zoning for the topologies listed above is available only on the following platforms

running Fabric OS v6.4.0:

• Brocade 5100