Brocade FICON Administrator’s Guide (Supporting Fabric OS v7.3.0) User Manual
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NOTE
If Lossless DLS is not enabled, the routing policy must be port-based routing (aptPolicy 1).
6.
Set In-Order Delivery using the iodSet command.
7.
Configure the switch parameters using the configure command and enter the responses shown
in the table below when prompted. (Items in italics are top-level parameters.)
FICON switch parameters
TABLE 2
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 domain 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. The Resource Allocation TimeOut Value (R_A_TOV) is
entered in milliseconds. This works with the variable E_D_TOV to
determine switch actions when presented with an error condition.
Allocated circuit resources with detected errors are not released until the
time value has expired. If the condition is resolved prior to the timeout, the
internal timeout clock resets and waits for the next error condition.
E_D_TOV
2000
The Error Detect TimeOut Value (E_D_TOV) is a timeout value entered in
milliseconds. This timer is used to flag a potential error condition when an
expected response is not received within the set time limit. If the time for
an expected response exceeds the set value, then an error condition
occurs. Leave this value at 2 seconds (2000) unless connected to
extension equipment. In some cases, when connecting to extension
equipment, such as the Brocade 7800, it must be set to 5 seconds (5000).
This field should only be changed after consulting a Brocade Certified
Fabric Professional.
WAN_TOV
0
Wide-Area Network TimeOut Value (WAN_TOV) is set in milliseconds.
This is the maximum frame timeout value for a WAN, if any,
interconnecting the Fibre Channel islands.
MAX HOPS
7
This parameter should not be confused with the one- hop FICON
cascading limitation. There are configurations that are 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. Specifies the largest possible value, in bytes, for the size
of a type 1 (data) frame. The switch advertises this value to other switches
in the fabric during construction of the fabric and to other devices when
they connect to the fabric. Setting this value smaller than 2112 may result
in decreased performance.
Sequence level
switching
0
Do not change. When set to 1, frames of the same sequence from a
particular source are transmitted together as a group. When set to 0,
frames are interleaved among multiple sequences when transmitted.
Under normal conditions, sequence-level switching should be disabled for
better performance.
Disable device
probing
1
The recommended best practice is to disable device probing. When
disable device probing is set to 1, devices that do not register with the
Name Server will not be present in the Name Server database.
Administering FICON Fabrics
38
FICON Administrator's Guide
53-1003144-01