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

FICON Administrator’s Guide 17
53-1001771-01
Configuring switched point-to-point FICON
2
5. Set the routing policy to port-based routing by entering the aptPolicy command.
The recommended best practice is to use exchange-based routing (aptPolicy 3); however,
exchanged-based routing is only supported for FICON when Lossless DLS is enabled. If
Lossless DLS is not enabled then port-based routing (aptPolicy 1) must be used.
In addition, if FICON Emulation features (XRC or Tape Pipelining) are enabled on an FCIP
Tunnel in the switch, aptPolicy 1 must also be used.
6. Configure Dynamic Load Sharing:.
The recommended best practice is to enable Dynamic Load Sharing (DLS); however, DLS is
only supported when Lossless is enabled.
• To enable Lossless with DLS, use the dlsSet --enable –lossless command.
• If Lossless will not be used, use the dlsReset command.
NOTE
If DLS is not enabled with Lossless, the routing policy must be port-based (aptPolicy 1).
7. Set In-Order Delivery using the iodSet command.
8. Configure the switch parameters using the configure command and enter the responses in
Table 2 when prompted. (Items in italics are top-level parameters.)
TABLE 2 FICON switch parameters
Parameter Response Comment
Fabric parameter Yes Prompts for the fabric parameters.
Domain The domain ID is the switch address. The
recommended best practice is to set the switch
address and switch ID to be the same. The domain ID
is entered in decimal so a switch address of
hexadecimal 0x22 would have a domain ID of decimal
34.
R_A_TOV 10000 Do not change.
E_D_TOV 2000 The E_D_TOV is a time out value entered in
milliseconds. It should remain at 2 seconds (2000)
unless connected to extension equipment. In some
cases, when connecting to extension equipment, such
as the Brocade 7500 or 7800, it needs to be set to 5
sec (5000). This field should only be changed after
consulting a Brocade Certified Fabric Professional.
WAN_TOV 0
MAX HOPS 7 This parameter should not be confused with the one
hop FICON cascading limitation. There are
configurations that are technically more than one hop
because more than two domain IDs are used in the
path that fit within the IBM support limitation of ‘one
hop.’
Data field size 2112 Do not change.
Sequence level switching 0 Do not change.
Disable device probing 0 Do not change.
Suppress Class F traffic 0 Do not change.