Brocade Communications Systems SN3000B Command Reference Manual page 641

Fabric OS Command Reference
53-1001764-01
--max-write-devs value
Defines the maximum number of concurrent emulated tape write operations.
As concurrency increases, the value of emulation decreases. Excessive
concurrency has the potential to oversubscribe packet data memory. The
setting has significance only for host (channel) initiated operations at this side
and will not affect tape write operations initiated by hosts (channels) attached
The default value is 16. The range is 1 to 32.
--write-timer value
Defines a time limit for pipelined write chains. This value is specified in
milliseconds (ms). If a pipelined write chain takes longer than this value to
complete, the ending status for the next write chain will be withheld from the
channel. This limits processing to what the network and device can support.
Too small a value limits pipelining performance. Too large a value results in
too much data being accepted for one device on a path. The default value is
300 milliseconds (ms). The range is 100 to 1500.
--write-chain value
Defines the maximum amount of data that can be contained in a single CCW
chain. If this value is exceeded, emulation is suspended. The default value is
3.2 MB (3200000 bytes) The range is 1 MB to 5 MB.
--oxid-base value
Defines the base value of an entry pool of 256 OXIDs supplied to
emulation-generated exchanges. It should fall outside the range used by
FICON channels and devices to avoid conflicts. The default value is 0x8000
(recommended setting). The range is 0x0000 to 0xF000.
--ficon-debug value
Defines optional debug flags. The default value is 0xF7C80000. This
parameter is primarily for use by technical support personnel.
Optional FCIP circuit arguments for fciptunnel create and modify include the
following.
-a | --admin-status [0|1]
Enables (1) or disables (0) the circuit. Admin status is disabled by default.
Use -a --admin-status to enable the feature when you create a circuit. Use
-a |--admin-status 0|1 when you modify a circuit.
-C | --connection-type [0|1|2] | [default|listener|initiator]
Specifies whether the circuit is the listener or the initiator. Values are
0=Default, 1=Listener, and 2=Initiator. You can use either the numeric values
or their string equivalents. String values are not case sensitive. In default
mode, the initiator and listener are automatically chosen based on the lower
and higher-order IP address. This can cause a problem in Network Address
Translation (NAT) environments, if both sides of the circuit have lower-order
addresses. This option is a disruptive modify request that causes the tunnel
to bounce. The command prompts for confirmation with an appropriate
message.
-s | --sack 0|1
Disables (0) or enables (1) selective acknowledgement code (SACK) on the
FCIP circuit. SACK is enabled by default. Use -s | --sack to disable the
feature when you create a circuit. Use -s | --sack 0 | 1 to disable or enable
SACK when you modify a circuit.
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